--- /dev/null
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?fileVersion 4.0.0?>
+
+<cproject storage_type_id="org.eclipse.cdt.core.XmlProjectDescriptionStorage">
+<storageModule moduleId="org.eclipse.cdt.core.settings">
+<cconfiguration id="0.2107346173">
+<storageModule buildSystemId="org.eclipse.cdt.managedbuilder.core.configurationDataProvider" id="0.2107346173" moduleId="org.eclipse.cdt.core.settings" name="Default">
+<externalSettings/>
+<extensions>
+<extension id="org.eclipse.cdt.core.VCErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+<extension id="org.eclipse.cdt.core.MakeErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+<extension id="org.eclipse.cdt.core.GCCErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+<extension id="org.eclipse.cdt.core.GASErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+<extension id="org.eclipse.cdt.core.GLDErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+</extensions>
+</storageModule>
+<storageModule moduleId="cdtBuildSystem" version="4.0.0">
+<configuration artifactName="simavr" buildProperties="" description="" id="0.2107346173" name="Default" parent="org.eclipse.cdt.build.core.prefbase.cfg">
+<folderInfo id="0.2107346173." name="/" resourcePath="">
+<toolChain id="org.eclipse.cdt.build.core.prefbase.toolchain.563132950" name="No ToolChain" resourceTypeBasedDiscovery="false" superClass="org.eclipse.cdt.build.core.prefbase.toolchain">
+<targetPlatform id="org.eclipse.cdt.build.core.prefbase.toolchain.563132950.732794089" name=""/>
+<builder arguments="jap make -C Sources/Utils/simavr" command="ssh" id="org.eclipse.cdt.build.core.settings.default.builder.618922905" keepEnvironmentInBuildfile="false" managedBuildOn="false" name="Gnu Make Builder" superClass="org.eclipse.cdt.build.core.settings.default.builder"/>
+<tool id="org.eclipse.cdt.build.core.settings.holder.libs.1175233835" name="holder for library settings" superClass="org.eclipse.cdt.build.core.settings.holder.libs"/>
+<tool id="org.eclipse.cdt.build.core.settings.holder.936002247" name="Assembly" superClass="org.eclipse.cdt.build.core.settings.holder">
+<inputType id="org.eclipse.cdt.build.core.settings.holder.inType.1978040989" languageId="org.eclipse.cdt.core.assembly" languageName="Assembly" sourceContentType="org.eclipse.cdt.core.asmSource" superClass="org.eclipse.cdt.build.core.settings.holder.inType"/>
+</tool>
+<tool id="org.eclipse.cdt.build.core.settings.holder.1940002337" name="GNU C++" superClass="org.eclipse.cdt.build.core.settings.holder">
+<inputType id="org.eclipse.cdt.build.core.settings.holder.inType.1031230860" languageId="org.eclipse.cdt.core.g++" languageName="GNU C++" sourceContentType="org.eclipse.cdt.core.cxxSource,org.eclipse.cdt.core.cxxHeader" superClass="org.eclipse.cdt.build.core.settings.holder.inType"/>
+</tool>
+<tool id="org.eclipse.cdt.build.core.settings.holder.1605608141" name="GNU C" superClass="org.eclipse.cdt.build.core.settings.holder">
+<inputType id="org.eclipse.cdt.build.core.settings.holder.inType.269360962" languageId="org.eclipse.cdt.core.gcc" languageName="GNU C" sourceContentType="org.eclipse.cdt.core.cSource,org.eclipse.cdt.core.cHeader" superClass="org.eclipse.cdt.build.core.settings.holder.inType"/>
+</tool>
+</toolChain>
+</folderInfo>
+</configuration>
+</storageModule>
+<storageModule moduleId="scannerConfiguration">
+<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
+<profile id="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/${specs_file}" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.make.core.GCCStandardMakePerFileProfile">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="makefileGenerator">
+<runAction arguments="-f ${project_name}_scd.mk" command="make" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCManagedMakePerProjectProfile">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/${specs_file}" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCManagedMakePerProjectProfileCPP">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/specs.cpp" command="g++" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCManagedMakePerProjectProfileC">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/specs.c" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCWinManagedMakePerProjectProfile">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/${specs_file}" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCWinManagedMakePerProjectProfileCPP">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/specs.cpp" command="g++" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCWinManagedMakePerProjectProfileC">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/specs.c" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<scannerConfigBuildInfo instanceId="0.2107346173">
+<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile"/>
+<profile id="org.eclipse.cdt.make.core.GCCStandardMakePerProjectProfile">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/${specs_file}" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.make.core.GCCStandardMakePerFileProfile">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="makefileGenerator">
+<runAction arguments="-f ${project_name}_scd.mk" command="make" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCManagedMakePerProjectProfile">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/${specs_file}" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCManagedMakePerProjectProfileCPP">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/specs.cpp" command="g++" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCManagedMakePerProjectProfileC">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/specs.c" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCWinManagedMakePerProjectProfile">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/${specs_file}" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCWinManagedMakePerProjectProfileCPP">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/specs.cpp" command="g++" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+<profile id="org.eclipse.cdt.managedbuilder.core.GCCWinManagedMakePerProjectProfileC">
+<buildOutputProvider>
+<openAction enabled="true" filePath=""/>
+<parser enabled="true"/>
+</buildOutputProvider>
+<scannerInfoProvider id="specsFile">
+<runAction arguments="-E -P -v -dD ${plugin_state_location}/specs.c" command="gcc" useDefault="true"/>
+<parser enabled="true"/>
+</scannerInfoProvider>
+</profile>
+</scannerConfigBuildInfo>
+</storageModule>
+<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
+</cconfiguration>
+</storageModule>
+<storageModule moduleId="cdtBuildSystem" version="4.0.0">
+<project id="simavr.null.2105255402" name="simavr"/>
+</storageModule>
+</cproject>
--- /dev/null
+obj
+*.axf
+*.hex
+*.s
+simavr/simavr
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+ <name>simavr</name>
+ <comment></comment>
+ <projects>
+ </projects>
+ <buildSpec>
+ <buildCommand>
+ <name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
+ <triggers>clean,full,incremental,</triggers>
+ <arguments>
+ <dictionary>
+ <key>?name?</key>
+ <value></value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.append_environment</key>
+ <value>true</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.autoBuildTarget</key>
+ <value>all</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.buildArguments</key>
+ <value>jap make -C Sources/Utils/simavr</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.buildCommand</key>
+ <value>ssh</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.cleanBuildTarget</key>
+ <value>clean</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.contents</key>
+ <value>org.eclipse.cdt.make.core.activeConfigSettings</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.enableAutoBuild</key>
+ <value>false</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.enableCleanBuild</key>
+ <value>true</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.enableFullBuild</key>
+ <value>true</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.fullBuildTarget</key>
+ <value>all</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.stopOnError</key>
+ <value>true</value>
+ </dictionary>
+ <dictionary>
+ <key>org.eclipse.cdt.make.core.useDefaultBuildCmd</key>
+ <value>false</value>
+ </dictionary>
+ </arguments>
+ </buildCommand>
+ <buildCommand>
+ <name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
+ <arguments>
+ </arguments>
+ </buildCommand>
+ </buildSpec>
+ <natures>
+ <nature>org.eclipse.cdt.core.cnature</nature>
+ <nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
+ <nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
+ </natures>
+</projectDescription>
--- /dev/null
+jx_browser_data 79
+# project tree
+0 "root"
+T
+1 "main"
+T
+2 "Makefile"
+F
+"./simavr/Makefile"
+T
+2 "avr_spi.c"
+F
+"./simavr/sim/avr_spi.c"
+T
+2 "avr_spi.h"
+F
+"./simavr/sim/avr_spi.h"
+T
+2 "avr_timer8.c"
+F
+"./simavr/sim/avr_timer8.c"
+T
+2 "avr_timer8.h"
+F
+"./simavr/sim/avr_timer8.h"
+T
+2 "avr_ioport.c"
+F
+"./simavr/sim/avr_ioport.c"
+T
+2 "avr_ioport.h"
+F
+"./simavr/sim/avr_ioport.h"
+T
+2 "avr_eeprom.c"
+F
+"./simavr/sim/avr_eeprom.c"
+T
+2 "avr_eeprom.h"
+F
+"./simavr/sim/avr_eeprom.h"
+T
+2 "avr_uart.c"
+F
+"./simavr/sim/avr_uart.c"
+T
+2 "avr_uart.h"
+F
+"./simavr/sim/avr_uart.h"
+T
+2 "sim_core.c"
+F
+"./simavr/sim/sim_core.c"
+T
+2 "sim_core.h"
+F
+"./simavr/sim/sim_core.h"
+T
+2 "sim_gdb.c"
+F
+"./simavr/sim/sim_gdb.c"
+T
+2 "sim_gdb.h"
+F
+"./simavr/sim/sim_gdb.h"
+T
+2 "sim_elf.c"
+F
+"./simavr/sim/sim_elf.c"
+T
+2 "sim_elf.h"
+F
+"./simavr/sim/sim_elf.h"
+T
+2 "simavr.c"
+F
+"./simavr/sim/simavr.c"
+T
+2 "simavr.h"
+F
+"./simavr/sim/simavr.h"
+F
+T
+1 "tests"
+T
+2 "atmega88_example.c"
+F
+"./tests/atmega88_example.c"
+F
+T
+1 "cores"
+T
+2 "sim_core_declare.h"
+F
+"./simavr/cores/sim_core_declare.h"
+T
+2 "sim_mega88.c"
+F
+"./simavr/cores/sim_mega88.c"
+T
+2 "sim_mega168.c"
+F
+"./simavr/cores/sim_mega168.c"
+T
+2 "sim_mega48.c"
+F
+"./simavr/cores/sim_mega48.c"
+T
+2 "sim_megax8.c"
+F
+"./simavr/cores/sim_megax8.c"
+T
+2 "sim_megax8.h"
+F
+"./simavr/cores/sim_megax8.h"
+T
+2 "sim_tiny85.c"
+F
+"./simavr/cores/sim_tiny85.c"
+T
+2 "sim_mega644.c"
+F
+"./simavr/cores/sim_mega644.c"
+F
+F
+# tasks
+4
+"echo Makefile must be updated manually"
+F
+# build settings
+0
+T
+"simavr"
+""
+"make -k all"
+# search paths
+T "./" T
+F
+# C preprocessor
+F
--- /dev/null
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+ To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights. Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received. You must make sure that they, too, receive
+or can get the source code. And you must show them these terms so they
+know their rights.
+
+ Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+ For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software. For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+ Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
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+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable. Therefore, we
+have designed this version of the GPL to prohibit the practice for those
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+stand ready to extend this provision to those domains in future versions
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+
+ Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
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+ The precise terms and conditions for copying, distribution and
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+
+ TERMS AND CONDITIONS
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+ "This License" refers to version 3 of the GNU General Public License.
+
+ "Copyright" also means copyright-like laws that apply to other kinds of
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+ "The Program" refers to any copyrightable work licensed under this
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+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
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+ 2. Basic Permissions.
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+ All rights granted under this License are granted for the term of
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+
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+
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+
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+
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+
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+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
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+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
--- /dev/null
+
+
+all: make-tests
+ make -C simavr
+
+make-tests:
+ make -C tests
+
+clean:
+ make -C simavr clean
+ make -C tests clean
+
\ No newline at end of file
--- /dev/null
+
+simavr -- a simple, lean and mean AVR simulator
+
+http://gitorious.org/simavr
+
+simavr is a new AVR simulator for linux, or any platform that uses avr-gcc. It uses
+avr-gcc own register definition to simplify creating new targets for supoortted AVR
+devices.
+
+The core was made to be small and compact, and hackable so allow quick protoyping
+of an AVR project. The simulator loads .elf directly, and there is even a way to
+specify simulation parameters directly in the emulated code using an .elf section.
+
+The status of the project is the core works at about 98% (ie, it works, but there
+is a known bug). The supported IOs are eeprom, IO ports (including pin interupts),
+8 bits timers (well, one of mode of the myriad) and a simple UART that makes
+ÒprintfÓ work.
+
+gdb support is planned next.
+
+PREQUISTES:
++ avr-gcc ; tested with 4.3.4 (from debian)
+ The code rudely assumes the avr-gcc is in /usr/lib/avr/include/...
++ libelf-dev
+
+BUILD:
++ make
+
+TEST:
++ ./simavr/simavr tests/atmega88_example.axf
+
+There are no command line options for now.. The simulator recognizes attiny85,
+atmega48,88,168 and atmega644. It's fairly easy to add new cores.
+
+Michel Pollet <buserror@gmail.com>
--- /dev/null
+/*
+ avr_mcu_section.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __AVR_MCU_SECTION_H__
+#define __AVR_MCU_SECTION_H__
+
+/*
+ * This structure is used to pass "parameters" to the programmer or the simulator,
+ * it tags the ELF file with a section that contains parameters about the physical
+ * AVR this was compiled for, including the speed, model, and signature bytes.
+ *
+ * A programmer software can read this and verify fuses values for example, and a
+ * simulator can instanciate the proper "model" of AVR, the speed and so on without
+ * command line parameters.
+ *
+ * Exemple of use:
+ *
+ * #include "avr_mcu_section.h"
+ * AVR_MCU(F_CPU, "atmega88");
+ *
+ */
+
+typedef struct avr_mcu_t {
+ long f_cpu; // avr is little endian
+ unsigned char id[4]; // signature bytes
+ unsigned char fuse[4]; // optional
+ char name[16];
+} avr_mcu_t;
+
+#define AVR_MCU(_speed, _name) \
+const avr_mcu_t _mmcu __attribute__((section(".mmcu"))) = {\
+ .f_cpu = _speed, \
+ .id = {SIGNATURE_0, SIGNATURE_1, SIGNATURE_2}, \
+ .name = _name,\
+}
+
+#endif
--- /dev/null
+#
+# Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+#
+# This file is part of simavr.
+#
+# simavr is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# simavr is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with simavr. If not, see <http://www.gnu.org/licenses/>.
+
+target = simavr
+
+CFLAGS = -g -std=gnu99 -Wall
+CFLAGS += -O3 -mfpmath=sse -msse2
+
+cores = ${wildcard cores/*.c}
+cores_o = ${patsubst cores/%.c, obj/%.o, ${cores}}
+sim = ${wildcard sim/*.c}
+sim_o = ${patsubst sim/%.c, obj/%.o, ${sim}}
+
+VPATH = .
+VPATH += cores
+VPATH += sim
+
+IPATH = .
+IPATH += sim
+IPATH += ../../shared
+IPATH += ../include
+IPATH += /opt/local/include
+
+CFLAGS += ${patsubst %,-I%,${subst :, ,${IPATH}}}
+LFLAGS = -L/opt/local/lib/
+LDFLAGS += -lelf
+
+all: obj ${target}
+
+obj:
+ @mkdir -p obj
+
+obj/sim_%.o : cores/sim_%.h cores/sim_core_declare.h sim/*.h
+obj/sim_%.o : cores/sim_%.c
+ @gcc $(CFLAGS) \
+ -I/usr/lib/avr/include/ \
+ $< -c -o $@
+ @echo CORE $<
+
+obj/%.o: %.h sim/*.h
+obj/%.o: %.c
+ @gcc $(CFLAGS) \
+ $< -c -o $@
+ @echo CC $<
+
+${target} : ${cores_o}
+${target} : ${sim_o}
+ @gcc $(CFLAGS) $(LFLAGS) \
+ ${^} -o $@ \
+ $(LDFLAGS)
+ @echo LD $@
+
+clean:
+ rm -rf ${target} obj
+
--- /dev/null
+/*
+ sim_core_declare.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __SIM_CORE_DECLARE_H__
+#define __SIM_CORE_DECLARE_H__
+
+/*
+ * The macros "fake" the ones in the real avrlib
+ */
+#define _SFR_IO8(v) ((v)+32)
+#define _SFR_MEM8(v) (v)
+#define _BV(v) (v)
+#define _VECTOR(v) (v)
+
+/*
+ * This declares a typical AVR core, using constants what appears
+ * to be in every io*.h file...
+ */
+#define DEFAULT_CORE(_vector_size) \
+ .ramend = RAMEND, \
+ .flashend = FLASHEND, \
+ .e2end = E2END, \
+ .vector_size = _vector_size, \
+ .signature = { SIGNATURE_0,SIGNATURE_1,SIGNATURE_2 }, \
+ .fuse = { LFUSE_DEFAULT, HFUSE_DEFAULT, EFUSE_DEFAULT }
+
+
+#endif /* __SIM_CORE_DECLARE_H__ */
--- /dev/null
+/*
+ sim_mega168.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "simavr.h"
+
+#define SIM_VECTOR_SIZE 4
+#define SIM_MMCU "atmega168"
+#define SIM_CORENAME mcu_mega168
+
+#define _AVR_IO_H_
+#define __ASSEMBLER__
+#include "avr/iom168.h"
+// instanciate the new core
+#include "sim_megax8.h"
+
+static avr_t * make()
+{
+ return &SIM_CORENAME.core;
+}
+
+avr_kind_t mega168 = {
+ .names = { "atmega168", "atmega168p","atmega168pa" },
+ .make = make
+};
+
--- /dev/null
+/*
+ sim_mega48.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "simavr.h"
+
+#define SIM_VECTOR_SIZE 2
+#define SIM_MMCU "atmega48"
+#define SIM_CORENAME mcu_mega48
+
+#define _AVR_IO_H_
+#define __ASSEMBLER__
+#include "avr/iom48.h"
+// instanciate the new core
+#include "sim_megax8.h"
+
+static avr_t * make()
+{
+ return &SIM_CORENAME.core;
+}
+
+avr_kind_t mega48 = {
+ .names = { "atmega48", "atmega48p","atmega48pa" },
+ .make = make
+};
+
--- /dev/null
+/*
+ sim_mega644.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include </usr/include/stdio.h>
+#include "simavr.h"
+#include "sim_core_declare.h"
+#include "avr_eeprom.h"
+#include "avr_ioport.h"
+#include "avr_uart.h"
+#include "avr_timer8.h"
+
+#define _AVR_IO_H_
+#define __ASSEMBLER__
+#include "avr/iom644.h"
+
+static void init(struct avr_t * avr);
+static void reset(struct avr_t * avr);
+
+
+static struct mcu_t {
+ avr_t core;
+ avr_eeprom_t eeprom;
+ avr_ioport_t porta, portb, portc, portd;
+ avr_uart_t uart0,uart1;
+ avr_timer8_t timer0,timer2;
+} mcu = {
+ .core = {
+ .mmcu = "atmega644",
+ DEFAULT_CORE(4),
+
+ .init = init,
+ .reset = reset,
+ },
+ .eeprom = {
+ .size = E2END+1,
+ .r_eearh = EEARH,
+ .r_eearl = EEARL,
+ .r_eedr = EEDR,
+ .r_eecr = EECR,
+ .eepm = { AVR_IO_REGBIT(EECR, EEPM0), AVR_IO_REGBIT(EECR, EEPM1) },
+ .eempe = AVR_IO_REGBIT(EECR, EEMPE),
+ .eepe = AVR_IO_REGBIT(EECR, EEPE),
+ .eere = AVR_IO_REGBIT(EECR, EERE),
+ .ready = {
+ .enable = AVR_IO_REGBIT(EECR, EERIE),
+ .vector = EE_READY_vect,
+ },
+ },
+ .porta = {
+ .name = 'A', .r_port = PORTA, .r_ddr = DDRA, .r_pin = PINA,
+ .pcint = {
+ .enable = AVR_IO_REGBIT(PCICR, PCIE0),
+ .raised = AVR_IO_REGBIT(PCIFR, PCIF0),
+ .vector = PCINT0_vect,
+ },
+ .r_pcint = PCMSK0,
+ },
+ .portb = {
+ .name = 'B', .r_port = PORTB, .r_ddr = DDRB, .r_pin = PINB,
+ .pcint = {
+ .enable = AVR_IO_REGBIT(PCICR, PCIE1),
+ .raised = AVR_IO_REGBIT(PCIFR, PCIF1),
+ .vector = PCINT1_vect,
+ },
+ .r_pcint = PCMSK1,
+ },
+ .portc = {
+ .name = 'C', .r_port = PORTC, .r_ddr = DDRC, .r_pin = PINC,
+ .pcint = {
+ .enable = AVR_IO_REGBIT(PCICR, PCIE2),
+ .raised = AVR_IO_REGBIT(PCIFR, PCIF2),
+ .vector = PCINT2_vect,
+ },
+ .r_pcint = PCMSK2,
+ },
+ .portd = {
+ .name = 'D', .r_port = PORTD, .r_ddr = DDRD, .r_pin = PIND,
+ .pcint = {
+ .enable = AVR_IO_REGBIT(PCICR, PCIE3),
+ .raised = AVR_IO_REGBIT(PCIFR, PCIF3),
+ .vector = PCINT3_vect,
+ },
+ .r_pcint = PCMSK3,
+ },
+
+ .uart0 = {
+ .disabled = AVR_IO_REGBIT(PRR,PRUSART0),
+ .name = '0',
+ .r_udr = UDR0,
+ .udre = AVR_IO_REGBIT(UCSR0A, UDRE0),
+
+ .r_ucsra = UCSR0A,
+ .r_ucsrb = UCSR0B,
+ .r_ucsrc = UCSR0C,
+ .r_ubrrl = UBRR0L,
+ .r_ubrrh = UBRR0H,
+ .rxc = {
+ .enable = AVR_IO_REGBIT(UCSR0B, RXCIE0),
+ .vector = USART0_RX_vect,
+ },
+ .txc = {
+ .enable = AVR_IO_REGBIT(UCSR0B, TXCIE0),
+ .vector = USART0_TX_vect,
+ },
+ .udrc = {
+ .enable = AVR_IO_REGBIT(UCSR0B, UDRIE0),
+ .vector = USART0_UDRE_vect,
+ },
+ },
+ .uart1 = {
+ .disabled = AVR_IO_REGBIT(PRR,PRUSART1),
+ .name = '1',
+ .r_udr = UDR1,
+ .udre = AVR_IO_REGBIT(UCSR1A, UDRE1),
+
+ .r_ucsra = UCSR1A,
+ .r_ucsrb = UCSR1B,
+ .r_ucsrc = UCSR1C,
+ .r_ubrrl = UBRR1L,
+ .r_ubrrh = UBRR1H,
+ .rxc = {
+ .enable = AVR_IO_REGBIT(UCSR1B, RXCIE1),
+ .vector = USART1_RX_vect,
+ },
+ .txc = {
+ .enable = AVR_IO_REGBIT(UCSR1B, TXCIE1),
+ .vector = USART1_TX_vect,
+ },
+ .udrc = {
+ .enable = AVR_IO_REGBIT(UCSR1B, UDRIE1),
+ .vector = USART1_UDRE_vect,
+ },
+ },
+
+ .timer0 = {
+ .name = '0',
+ .wgm = { AVR_IO_REGBIT(TCCR0A, WGM00), AVR_IO_REGBIT(TCCR0A, WGM01), AVR_IO_REGBIT(TCCR0B, WGM02) },
+ .cs = { AVR_IO_REGBIT(TCCR0B, CS00), AVR_IO_REGBIT(TCCR0B, CS01), AVR_IO_REGBIT(TCCR0B, CS02) },
+ .cs_div = { 0, 0, 3 /* 8 */, 6 /* 64 */, 8 /* 256 */, 10 /* 1024 */ },
+
+ .r_ocra = OCR0A,
+ .r_ocrb = OCR0B,
+ .r_tcnt = TCNT0,
+
+ .overflow = {
+ .enable = AVR_IO_REGBIT(TIMSK0, TOIE0),
+ .raised = AVR_IO_REGBIT(TIFR0, TOV0),
+ .vector = TIMER0_OVF_vect,
+ },
+ .compa = {
+ .enable = AVR_IO_REGBIT(TIMSK0, OCIE0A),
+ .raised = AVR_IO_REGBIT(TIFR0, OCF0A),
+ .vector = TIMER0_COMPA_vect,
+ },
+ .compb = {
+ .enable = AVR_IO_REGBIT(TIMSK0, OCIE0B),
+ .raised = AVR_IO_REGBIT(TIFR0, OCF0B),
+ .vector = TIMER0_COMPB_vect,
+ },
+ },
+ .timer2 = {
+ .name = '2',
+ .wgm = { AVR_IO_REGBIT(TCCR2A, WGM20), AVR_IO_REGBIT(TCCR2A, WGM21), AVR_IO_REGBIT(TCCR2B, WGM22) },
+ .cs = { AVR_IO_REGBIT(TCCR2B, CS20), AVR_IO_REGBIT(TCCR2B, CS21), AVR_IO_REGBIT(TCCR2B, CS22) },
+ .cs_div = { 0, 0, 3 /* 8 */, 5 /* 32 */, 6 /* 64 */, 7 /* 128 */, 8 /* 256 */, 10 /* 1024 */ },
+
+ .r_ocra = OCR2A,
+ .r_ocrb = OCR2B,
+ .r_tcnt = TCNT2,
+
+ // asynchronous timer source bit.. if set, use 32khz frequency
+ .as2 = AVR_IO_REGBIT(ASSR, AS2),
+
+ .overflow = {
+ .enable = AVR_IO_REGBIT(TIMSK2, TOIE2),
+ .raised = AVR_IO_REGBIT(TIFR2, TOV2),
+ .vector = TIMER2_OVF_vect,
+ },
+ .compa = {
+ .enable = AVR_IO_REGBIT(TIMSK2, OCIE2A),
+ .raised = AVR_IO_REGBIT(TIFR2, OCF2A),
+ .vector = TIMER2_COMPA_vect,
+ },
+ .compb = {
+ .enable = AVR_IO_REGBIT(TIMSK2, OCIE2B),
+ .raised = AVR_IO_REGBIT(TIFR2, OCF2B),
+ .vector = TIMER2_COMPB_vect,
+ },
+ },
+};
+
+static avr_t * make()
+{
+ return &mcu.core;
+}
+
+avr_kind_t mega644 = {
+ .names = { "atmega644", "atmega644p" },
+ .make = make
+};
+
+static void init(struct avr_t * avr)
+{
+ struct mcu_t * mcu = (struct mcu_t*)avr;
+
+ printf("%s init\n", avr->mmcu);
+
+ avr_eeprom_init(avr, &mcu->eeprom);
+ avr_ioport_init(avr, &mcu->porta);
+ avr_ioport_init(avr, &mcu->portb);
+ avr_ioport_init(avr, &mcu->portc);
+ avr_ioport_init(avr, &mcu->portd);
+ avr_uart_init(avr, &mcu->uart0);
+ avr_uart_init(avr, &mcu->uart1);
+ avr_timer8_init(avr, &mcu->timer0);
+ avr_timer8_init(avr, &mcu->timer2);
+}
+
+static void reset(struct avr_t * avr)
+{
+// struct mcu_t * mcu = (struct mcu_t*)avr;
+}
--- /dev/null
+/*
+ sim_mega88.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "simavr.h"
+
+#define SIM_VECTOR_SIZE 2
+#define SIM_MMCU "atmega88"
+#define SIM_CORENAME mcu_mega88
+
+#define _AVR_IO_H_
+#define __ASSEMBLER__
+#include "avr/iom88.h"
+// instanciate the new core
+#include "sim_megax8.h"
+
+static avr_t * make()
+{
+ return &SIM_CORENAME.core;
+}
+
+avr_kind_t mega88 = {
+ .names = { "atmega88", "atmega88p","atmega88pa" },
+ .make = make
+};
+
--- /dev/null
+/*
+ sim_megax8.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stdio.h>
+#include "simavr.h"
+
+#include "sim_megax8.h"
+
+void mx8_init(struct avr_t * avr)
+{
+ struct mcu_t * mcu = (struct mcu_t*)avr;
+
+ printf("%s init\n", avr->mmcu);
+
+ avr_eeprom_init(avr, &mcu->eeprom);
+ avr_ioport_init(avr, &mcu->portb);
+ avr_ioport_init(avr, &mcu->portc);
+ avr_ioport_init(avr, &mcu->portd);
+ avr_uart_init(avr, &mcu->uart);
+ avr_timer8_init(avr, &mcu->timer0);
+ avr_timer8_init(avr, &mcu->timer2);
+ avr_spi_init(avr, &mcu->spi);
+}
+
+void mx8_reset(struct avr_t * avr)
+{
+// struct mcu_t * mcu = (struct mcu_t*)avr;
+}
--- /dev/null
+/*
+ sim_megax8.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef __SIM_MEGAX8_H__
+#define __SIM_MEGAX8_H__
+
+#include "sim_core_declare.h"
+#include "avr_eeprom.h"
+#include "avr_ioport.h"
+#include "avr_uart.h"
+#include "avr_timer8.h"
+#include "avr_spi.h"
+
+void mx8_init(struct avr_t * avr);
+void mx8_reset(struct avr_t * avr);
+
+/*
+ * This is a template for all of the x8 devices, hopefuly
+ */
+struct mcu_t {
+ avr_t core;
+ avr_eeprom_t eeprom;
+ avr_ioport_t portb,portc,portd;
+ avr_uart_t uart;
+ avr_timer8_t timer0,timer2;
+ avr_spi_t spi;
+};
+
+#ifdef SIM_CORENAME
+
+#ifndef SIM_VECTOR_SIZE
+#error SIM_VECTOR_SIZE is not declared
+#endif
+#ifndef SIM_MMCU
+#error SIM_MMCU is not declared
+#endif
+
+struct mcu_t SIM_CORENAME = {
+ .core = {
+ .mmcu = SIM_MMCU,
+ DEFAULT_CORE(SIM_VECTOR_SIZE),
+
+ .init = mx8_init,
+ .reset = mx8_reset,
+ },
+ .eeprom = {
+ .size = E2END+1,
+ .r_eearh = EEARH,
+ .r_eearl = EEARL,
+ .r_eedr = EEDR,
+ .r_eecr = EECR,
+ .eepm = { AVR_IO_REGBIT(EECR, EEPM0), AVR_IO_REGBIT(EECR, EEPM1) },
+ .eempe = AVR_IO_REGBIT(EECR, EEMPE),
+ .eepe = AVR_IO_REGBIT(EECR, EEPE),
+ .eere = AVR_IO_REGBIT(EECR, EERE),
+ .ready = {
+ .enable = AVR_IO_REGBIT(EECR, EERIE),
+ .vector = EE_READY_vect,
+ },
+ },
+ .portb = {
+ .name = 'B', .r_port = PORTB, .r_ddr = DDRB, .r_pin = PINB,
+ .pcint = {
+ .enable = AVR_IO_REGBIT(PCICR, PCIE0),
+ .raised = AVR_IO_REGBIT(PCIFR, PCIF0),
+ .vector = PCINT0_vect,
+ },
+ .r_pcint = PCMSK0,
+ },
+ .portc = {
+ .name = 'C', .r_port = PORTC, .r_ddr = DDRC, .r_pin = PINC,
+ .pcint = {
+ .enable = AVR_IO_REGBIT(PCICR, PCIE1),
+ .raised = AVR_IO_REGBIT(PCIFR, PCIF1),
+ .vector = PCINT1_vect,
+ },
+ .r_pcint = PCMSK1,
+ },
+ .portd = {
+ .name = 'D', .r_port = PORTD, .r_ddr = DDRD, .r_pin = PIND,
+ .pcint = {
+ .enable = AVR_IO_REGBIT(PCICR, PCIE2),
+ .raised = AVR_IO_REGBIT(PCIFR, PCIF2),
+ .vector = PCINT2_vect,
+ },
+ .r_pcint = PCMSK2,
+ },
+
+ .uart = {
+ .disabled = AVR_IO_REGBIT(PRR,PRUSART0),
+ .name = '0',
+ .r_udr = UDR0,
+ .udre = AVR_IO_REGBIT(UCSR0A, UDRE0),
+
+ .r_ucsra = UCSR0A,
+ .r_ucsrb = UCSR0B,
+ .r_ucsrc = UCSR0C,
+ .r_ubrrl = UBRR0L,
+ .r_ubrrh = UBRR0H,
+ .rxc = {
+ .enable = AVR_IO_REGBIT(UCSR0B, RXCIE0),
+ .vector = USART_RX_vect,
+ },
+ .txc = {
+ .enable = AVR_IO_REGBIT(UCSR0B, TXCIE0),
+ .vector = USART_TX_vect,
+ },
+ .udrc = {
+ .enable = AVR_IO_REGBIT(UCSR0B, UDRIE0),
+ .vector = USART_UDRE_vect,
+ },
+ },
+
+ .timer0 = {
+ .name = '0',
+ .disabled = AVR_IO_REGBIT(PRR,PRTIM0),
+ .wgm = { AVR_IO_REGBIT(TCCR0A, WGM00), AVR_IO_REGBIT(TCCR0A, WGM01), AVR_IO_REGBIT(TCCR0B, WGM02) },
+ .cs = { AVR_IO_REGBIT(TCCR0B, CS00), AVR_IO_REGBIT(TCCR0B, CS01), AVR_IO_REGBIT(TCCR0B, CS02) },
+ .cs_div = { 0, 0, 3 /* 8 */, 6 /* 64 */, 8 /* 256 */, 10 /* 1024 */ },
+
+ .r_ocra = OCR0A,
+ .r_ocrb = OCR0B,
+ .r_tcnt = TCNT0,
+
+ .overflow = {
+ .enable = AVR_IO_REGBIT(TIMSK0, TOIE0),
+ .raised = AVR_IO_REGBIT(TIFR0, TOV0),
+ .vector = TIMER0_OVF_vect,
+ },
+ .compa = {
+ .enable = AVR_IO_REGBIT(TIMSK0, OCIE0A),
+ .raised = AVR_IO_REGBIT(TIFR0, OCF0A),
+ .vector = TIMER0_COMPA_vect,
+ },
+ .compb = {
+ .enable = AVR_IO_REGBIT(TIMSK0, OCIE0B),
+ .raised = AVR_IO_REGBIT(TIFR0, OCF0B),
+ .vector = TIMER0_COMPB_vect,
+ },
+ },
+ .timer2 = {
+ .name = '2',
+ .disabled = AVR_IO_REGBIT(PRR,PRTIM2),
+ .wgm = { AVR_IO_REGBIT(TCCR2A, WGM20), AVR_IO_REGBIT(TCCR2A, WGM21), AVR_IO_REGBIT(TCCR2B, WGM22) },
+ .cs = { AVR_IO_REGBIT(TCCR2B, CS20), AVR_IO_REGBIT(TCCR2B, CS21), AVR_IO_REGBIT(TCCR2B, CS22) },
+ .cs_div = { 0, 0, 3 /* 8 */, 5 /* 32 */, 6 /* 64 */, 7 /* 128 */, 8 /* 256 */, 10 /* 1024 */ },
+
+ .r_ocra = OCR2A,
+ .r_ocrb = OCR2B,
+ .r_tcnt = TCNT2,
+
+ // asynchronous timer source bit.. if set, use 32khz frequency
+ .as2 = AVR_IO_REGBIT(ASSR, AS2),
+
+ .overflow = {
+ .enable = AVR_IO_REGBIT(TIMSK2, TOIE2),
+ .raised = AVR_IO_REGBIT(TIFR2, TOV2),
+ .vector = TIMER2_OVF_vect,
+ },
+ .compa = {
+ .enable = AVR_IO_REGBIT(TIMSK2, OCIE2A),
+ .raised = AVR_IO_REGBIT(TIFR2, OCF2A),
+ .vector = TIMER2_COMPA_vect,
+ },
+ .compb = {
+ .enable = AVR_IO_REGBIT(TIMSK2, OCIE2B),
+ .raised = AVR_IO_REGBIT(TIFR2, OCF2B),
+ .vector = TIMER2_COMPB_vect,
+ },
+ },
+
+ .spi = {
+ .disabled = AVR_IO_REGBIT(PRR,PRSPI),
+ .spe = AVR_IO_REGBIT(SPCR, SPE),
+ .dord = AVR_IO_REGBIT(SPCR, DORD),
+ .mstr = AVR_IO_REGBIT(SPCR, MSTR),
+ .cpol = AVR_IO_REGBIT(SPCR, CPOL),
+ .cpha = AVR_IO_REGBIT(SPCR, CPHA),
+
+ .spr = { AVR_IO_REGBIT(SPCR, SPR0), AVR_IO_REGBIT(SPCR, SPR1), AVR_IO_REGBIT(SPSR, SPI2X) },
+ .spi = {
+ .enable = AVR_IO_REGBIT(SPCR, SPIE),
+ .raised = AVR_IO_REGBIT(SPSR, SPIF),
+ .vector = SPI_STC_vect,
+ },
+ },
+};
+#endif /* SIM_CORENAME */
+
+#endif /* __SIM_MEGAX8_H__ */
\ No newline at end of file
--- /dev/null
+/*
+ sim_tiny85.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include </usr/include/stdio.h>
+#include "simavr.h"
+#include "sim_core_declare.h"
+#include "avr_eeprom.h"
+#include "avr_ioport.h"
+#include "avr_timer8.h"
+
+#define _AVR_IO_H_
+#define __ASSEMBLER__
+#include "avr/iotn85.h"
+
+static void init(struct avr_t * avr);
+static void reset(struct avr_t * avr);
+
+
+static struct mcu_t {
+ avr_t core;
+ avr_eeprom_t eeprom;
+ avr_ioport_t portb;
+ avr_timer8_t timer0, timer1;
+} mcu = {
+ .core = {
+ .mmcu = "attiny85",
+ DEFAULT_CORE(2),
+
+ .init = init,
+ .reset = reset,
+ },
+ .eeprom = {
+ .size = E2END+1,
+ .r_eearh = EEARH,
+ .r_eearl = EEARL,
+ .r_eedr = EEDR,
+ .r_eecr = EECR,
+ .eepm = { AVR_IO_REGBIT(EECR, EEPM0), AVR_IO_REGBIT(EECR, EEPM1) },
+ .eempe = AVR_IO_REGBIT(EECR, EEMPE),
+ .eepe = AVR_IO_REGBIT(EECR, EEPE),
+ .eere = AVR_IO_REGBIT(EECR, EERE),
+ .ready = {
+ .enable = AVR_IO_REGBIT(EECR, EERIE),
+ .vector = EE_RDY_vect,// EE_READY_vect,
+ },
+ },
+ .portb = {
+ .name = 'B', .r_port = PORTB, .r_ddr = DDRB, .r_pin = PINB,
+ .pcint = {
+ .enable = AVR_IO_REGBIT(GIMSK, PCIE),
+ .raised = AVR_IO_REGBIT(GIFR, PCIF),
+ .vector = PCINT0_vect,
+ },
+ .r_pcint = PCMSK,
+ },
+ .timer0 = {
+ .name = '0',
+ .wgm = { AVR_IO_REGBIT(TCCR0A, WGM00), AVR_IO_REGBIT(TCCR0A, WGM01), AVR_IO_REGBIT(TCCR0B, WGM02) },
+ .cs = { AVR_IO_REGBIT(TCCR0B, CS00), AVR_IO_REGBIT(TCCR0B, CS01), AVR_IO_REGBIT(TCCR0B, CS02) },
+ .cs_div = { 0, 0, 3 /* 8 */, 6 /* 64 */, 8 /* 256 */, 10 /* 1024 */ },
+
+ .r_ocra = OCR0A,
+ .r_ocrb = OCR0B,
+ .r_tcnt = TCNT0,
+
+ .overflow = {
+ .enable = AVR_IO_REGBIT(TIMSK, TOIE0),
+ .raised = AVR_IO_REGBIT(TIFR, TOV0),
+ .vector = TIMER0_OVF_vect,
+ },
+ .compa = {
+ .enable = AVR_IO_REGBIT(TIMSK, OCIE0A),
+ .raised = AVR_IO_REGBIT(TIFR, OCF0A),
+ .vector = TIMER0_COMPA_vect,
+ },
+ .compb = {
+ .enable = AVR_IO_REGBIT(TIMSK, OCIE0B),
+ .raised = AVR_IO_REGBIT(TIFR, OCF0B),
+ .vector = TIMER0_COMPB_vect,
+ },
+ },
+ .timer1 = {
+ .name = '1',
+ // no wgm bits
+ .cs = { AVR_IO_REGBIT(TCCR1, CS10), AVR_IO_REGBIT(TCCR1, CS11), AVR_IO_REGBIT(TCCR1, CS12), AVR_IO_REGBIT(TCCR1, CS13) },
+ .cs_div = { 0, 0, 1 /* 2 */, 2 /* 4 */, 3 /* 8 */, 4 /* 16 */ },
+
+ .r_ocra = OCR1A,
+ .r_ocrb = OCR1B,
+ .r_ocrc = OCR1C,
+ .r_tcnt = TCNT1,
+
+ .overflow = {
+ .enable = AVR_IO_REGBIT(TIMSK, TOIE1),
+ .raised = AVR_IO_REGBIT(TIFR, TOV1),
+ .vector = TIMER1_OVF_vect,
+ },
+ .compa = {
+ .enable = AVR_IO_REGBIT(TIMSK, OCIE1A),
+ .raised = AVR_IO_REGBIT(TIFR, OCF1A),
+ .vector = TIMER1_COMPA_vect,
+ },
+ .compb = {
+ .enable = AVR_IO_REGBIT(TIMSK, OCIE1B),
+ .raised = AVR_IO_REGBIT(TIFR, OCF1B),
+ .vector = TIMER1_COMPB_vect,
+ },
+ },
+
+
+};
+
+static avr_t * make()
+{
+ return &mcu.core;
+}
+
+avr_kind_t tiny85 = {
+ .make = make
+};
+
+static void init(struct avr_t * avr)
+{
+ struct mcu_t * mcu = (struct mcu_t*)avr;
+
+ printf("%s init\n", avr->mmcu);
+
+ avr_eeprom_init(avr, &mcu->eeprom);
+ avr_ioport_init(avr, &mcu->portb);
+ avr_timer8_init(avr, &mcu->timer0);
+ avr_timer8_init(avr, &mcu->timer1);
+}
+
+static void reset(struct avr_t * avr)
+{
+// struct mcu_t * mcu = (struct mcu_t*)avr;
+}
--- /dev/null
+/*
+ avr_eeprom.c
+
+ IO module that simulates the AVR EEProm
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "avr_eeprom.h"
+
+static void avr_eeprom_run(avr_t * avr, avr_io_t * port)
+{
+ avr_eeprom_t * p = (avr_eeprom_t *)port;
+ //printf("%s\n", __FUNCTION__);
+ if (p->eempe_clear_timer) {
+ p->eempe_clear_timer--;
+ if (p->eempe_clear_timer == 0) {
+ avr_regbit_clear(avr, p->eempe);
+ }
+ }
+ if (p->ready_raise_timer) {
+ p->ready_raise_timer--;
+ if (p->ready_raise_timer == 0) {
+ avr_raise_interupt(avr, &p->ready);
+ }
+ }
+}
+
+static void avr_eeprom_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param)
+{
+ avr_eeprom_t * p = (avr_eeprom_t *)param;
+ uint8_t eempe = avr_regbit_get(avr, p->eempe);
+
+ avr_core_watch_write(avr, addr, v);
+
+ if (!eempe && avr_regbit_get(avr, p->eempe)) {
+ p->eempe_clear_timer = 4; // auto clear, later
+ }
+
+ if (eempe && avr_regbit_get(avr, p->eepe)) { // write operation
+ uint16_t addr = avr->data[p->r_eearl] | (avr->data[p->r_eearh] << 8);
+ printf("eeprom write %04x <- %02x\n", addr, avr->data[p->r_eedr]);
+ p->eeprom[addr] = avr->data[p->r_eedr];
+ // automaticaly clears that bit (?)
+ p->eempe_clear_timer = 0;
+ avr_regbit_clear(avr, p->eempe);
+
+ p->ready_raise_timer = 1024; // make a avr_milliseconds_to_cycle(...) 3.4ms here
+ }
+ if (avr_regbit_get(avr, p->eere)) { // read operation
+ uint16_t addr = avr->data[p->r_eearl] | (avr->data[p->r_eearh] << 8);
+ avr->data[p->r_eedr] = p->eeprom[addr];
+ printf("eeprom read %04x : %02x\n", addr, p->eeprom[addr]);
+ }
+
+ // autocleared
+ avr_regbit_clear(avr, p->eepe);
+ avr_regbit_clear(avr, p->eere);
+}
+
+static int avr_eeprom_ioctl(avr_t * avr, avr_io_t * port, uint32_t ctl, void * io_param)
+{
+ avr_eeprom_t * p = (avr_eeprom_t *)port;
+ int res = -1;
+
+ switch(ctl) {
+ case AVR_IOCTL_EEPROM_SET: {
+ avr_eeprom_desc_t * desc = (avr_eeprom_desc_t*)io_param;
+ if (!desc || !desc->size || !desc->ee || (desc->offset + desc->size) >= p->size) {
+ printf("%s: AVR_IOCTL_EEPROM_SET Invalid argument\n",
+ __FUNCTION__);
+ return -2;
+ }
+ memcpy(p->eeprom + desc->offset, desc->ee, desc->size);
+ printf("%s: AVR_IOCTL_EEPROM_SET Loaded %d at offset %d\n",
+ __FUNCTION__, desc->size, desc->offset);
+ } break;
+ }
+
+ return res;
+}
+
+static avr_io_t _io = {
+ .kind = "eeprom",
+ .run = avr_eeprom_run,
+ .ioctl = avr_eeprom_ioctl,
+};
+
+void avr_eeprom_init(avr_t * avr, avr_eeprom_t * p)
+{
+ p->io = _io;
+ printf("%s init (%d bytes) EEL/H:%02x/%02x EED=%02x EEC=%02x\n",
+ __FUNCTION__, p->size, p->r_eearl, p->r_eearh, p->r_eedr, p->r_eecr);
+
+ p->eeprom = malloc(p->size);
+ memset(p->eeprom, 0xff, p->size);
+
+ avr_register_io(avr, &p->io);
+ avr_register_vector(avr, &p->ready);
+
+ avr_register_io_write(avr, p->r_eecr, avr_eeprom_write, p);
+}
+
--- /dev/null
+/*
+ avr_eeprom.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __AVR_EEPROM_H__
+#define __AVR_EEPROM_H__
+
+#include "simavr.h"
+
+typedef struct avr_eeprom_t {
+ avr_io_t io;
+
+ uint8_t * eeprom; // actual bytes
+ uint16_t size; // size for this MCU
+
+ uint8_t r_eearh;
+ uint8_t r_eearl;
+ uint8_t r_eedr;
+
+ // eepm -- eeprom write mode
+ uint8_t r_eecr; // shortcut, assumes these bits fit in that register
+ avr_regbit_t eepm[4];
+ avr_regbit_t eempe; // eeprom master program enable
+ avr_regbit_t eepe; // eeprom program enable
+ avr_regbit_t eere; // eeprom read enable
+
+ avr_int_vector_t ready; // EERIE vector
+
+ uint32_t eempe_clear_timer;
+ uint32_t ready_raise_timer;
+} avr_eeprom_t;
+
+void avr_eeprom_init(avr_t * avr, avr_eeprom_t * port);
+
+typedef struct avr_eeprom_desc_t {
+ uint8_t * ee;
+ uint16_t offset;
+ uint32_t size;
+} avr_eeprom_desc_t;
+
+#define AVR_IOCTL_EEPROM_GET AVR_IOCTL_DEF('e','e','g','p')
+#define AVR_IOCTL_EEPROM_SET AVR_IOCTL_DEF('e','e','s','p')
+
+#endif /* __AVR_EEPROM_H__ */
--- /dev/null
+/*
+ avr_ioport.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include "avr_ioport.h"
+
+static void avr_ioport_run(avr_t * avr, avr_io_t * port)
+{
+ //printf("%s\n", __FUNCTION__);
+}
+
+static uint8_t avr_ioport_read(struct avr_t * avr, uint8_t addr, void * param)
+{
+ avr_ioport_t * p = (avr_ioport_t *)param;
+ uint8_t v = avr->data[addr];
+
+ if (addr == p->r_pin) {
+ uint8_t v = avr->data[p->r_port];
+ avr->data[addr] = v;
+ // made to trigger potential watchpoints
+ v = avr_core_watch_read(avr, addr);
+// printf("** PIN%c(%02x) = %02x\n", p->name, addr, v);
+ }
+ return v;
+}
+
+static void avr_ioport_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param)
+{
+ avr_ioport_t * p = (avr_ioport_t *)param;
+ uint8_t oldv = avr->data[addr];
+
+ if (addr == p->r_port) {
+ // printf("PORT%c(%02x) = %02x (was %02x)\n", p->name, addr, v, oldv);
+
+ avr_core_watch_write(avr, addr, v);
+ if (v != oldv) {
+ int raise = 1;
+ int mask = v ^ oldv;
+ if (p->r_pcint)
+ raise = avr->data[p->r_pcint] & mask;
+ if (raise)
+ avr_raise_interupt(avr, &p->pcint);
+ }
+
+
+ if (p->name == 'D') {
+ static int cs = -1;
+ if ((oldv & 0xf0) != (v & 0xf0)) {
+ for (int i = 0; i < 4; i++) {
+
+ }
+ }
+ {
+ }
+ }
+ }
+}
+
+static void avr_ioport_reset(avr_t * avr, avr_io_t * port)
+{
+}
+
+static avr_io_t _io = {
+ .kind = "io",
+ .run = avr_ioport_run,
+ .reset = avr_ioport_reset,
+};
+
+void avr_ioport_init(avr_t * avr, avr_ioport_t * port)
+{
+ port->io = _io;
+ printf("%s PIN%c 0x%02x DDR%c 0x%02x PORT%c 0x%02x\n",
+ __FUNCTION__,
+ port->name, port->r_pin,
+ port->name, port->r_ddr,
+ port->name, port->r_port);
+
+ avr_register_io(avr, &port->io);
+ avr_register_vector(avr, &port->pcint);
+
+ avr_register_io_write(avr, port->r_port, avr_ioport_write, port);
+ avr_register_io_read(avr, port->r_pin, avr_ioport_read, port);
+}
+
--- /dev/null
+/*
+ avr_ioport.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __AVR_IOPORT_H__
+#define __AVR_IOPORT_H__
+
+#include "simavr.h"
+
+typedef struct avr_ioport_t {
+ avr_io_t io;
+ char name;
+ uint8_t r_port;
+ uint8_t r_ddr;
+ uint8_t r_pin;
+
+ avr_int_vector_t pcint; // PCINT vector
+ uint8_t r_pcint; // pcint 8 pins mask
+
+} avr_ioport_t;
+
+void avr_ioport_init(avr_t * avr, avr_ioport_t * port);
+
+#endif /* __AVR_IOPORT_H__ */
--- /dev/null
+/*
+ avr_spi.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include "avr_spi.h"
+
+static void avr_spi_run(avr_t * avr, avr_io_t * port)
+{
+// printf("%s\n", __FUNCTION__);
+}
+
+#if 0
+static uint8_t avr_spi_read(struct avr_t * avr, uint8_t addr, void * param)
+{
+ avr_spi_t * p = (avr_spi_t *)param;
+ uint8_t v = avr->data[addr];
+// printf("** PIN%c = %02x\n", p->name, v);
+ return v;
+}
+
+static void avr_spi_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param)
+{
+ avr_spi_t * p = (avr_spi_t *)param;
+
+ if (addr == p->r_udr) {
+ // printf("UDR%c(%02x) = %02x\n", p->name, addr, v);
+ avr_core_watch_write(avr, addr, v);
+ avr_regbit_set(avr, p->udre);
+
+ static char buf[128];
+ static int l = 0;
+ buf[l++] = v <= ' ' ? '.' : v;
+ buf[l] = 0;
+ if (v == '\n' || l == 127) {
+ l = 0;
+ printf("\e[32m%s\e[0m\n", buf);
+ }
+ }
+}
+#endif
+
+void avr_spi_reset(avr_t * avr, struct avr_io_t *io)
+{
+// avr_spi_t * p = (avr_spi_t *)io;
+// avr_regbit_set(avr, p->udre);
+}
+
+static avr_io_t _io = {
+ .kind = "spi",
+ .run = avr_spi_run,
+ .reset = avr_spi_reset,
+};
+
+void avr_spi_init(avr_t * avr, avr_spi_t * p)
+{
+ p->io = _io;
+ avr_register_io(avr, &p->io);
+
+ printf("%s SPI%c init\n", __FUNCTION__, p->name);
+
+// avr_register_io_write(avr, p->r_udr, avr_spi_write, p);
+// avr_register_io_read(avr, p->r_udr, avr_spi_read, p);
+}
+
--- /dev/null
+/*
+ avr_spi.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef AVR_SPI_H_
+#define AVR_SPI_H_
+
+#include "simavr.h"
+
+typedef struct avr_spi_t {
+ avr_io_t io;
+ char name;
+ avr_regbit_t disabled; // bit in the PRR
+
+ uint8_t r_spdr; // data register
+ uint8_t r_spcr; // control register
+
+ avr_regbit_t spe; // spi enable
+ avr_regbit_t dord; // data order
+ avr_regbit_t mstr; // master/slave
+ avr_regbit_t cpol; // clock polarity
+ avr_regbit_t cpha; // phase
+ avr_regbit_t spr[4]; // clock divider
+
+ avr_int_vector_t spi; // spi interupt
+} avr_spi_t;
+
+void avr_spi_init(avr_t * avr, avr_spi_t * port);
+
+#endif /* AVR_SPI_H_ */
--- /dev/null
+/*
+ avr_timer8.c
+
+ Handles the just one mode of the 8 bit AVR timer.
+ Still need to handle all the others!
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include "avr_timer8.h"
+
+static void avr_timer8_run(avr_t * avr, avr_io_t * port)
+{
+ avr_timer8_t * p = (avr_timer8_t *)port;
+ //printf("%s\n", __FUNCTION__);
+
+ if (p->compa_cycles) {
+ if (p->compa_next == 0) {
+ p->compa_next = avr->cycle + p->compa_cycles;
+ }
+ if (avr->cycle >= p->compa_next) {
+ // printf("timer a firea %d\n", p->compa_next);
+ fflush(stdout);
+ p->compa_next += p->compa_cycles;
+ avr_raise_interupt(avr, &p->compa);
+ }
+ }
+}
+
+#if 0
+static uint8_t avr_timer8_read(struct avr_t * avr, uint8_t addr, void * param)
+{
+ avr_timer8_t * p = (avr_timer8_t *)param;
+ uint8_t v = avr->data[addr];
+
+ if (addr == p->r_pin) {
+ uint8_t v = avr->data[p->r_port];
+ avr->data[addr] = v;
+ // made to trigger potential watchpoints
+ v = avr_core_watch_read(avr, addr);
+ printf("** PIN%c(%02x) = %02x\n", p->name, addr, v);
+ }
+ return v;
+}
+#endif
+
+static void avr_timer8_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param)
+{
+ avr_timer8_t * p = (avr_timer8_t *)param;
+// uint8_t oldv = avr->data[addr];
+
+ p->compa_cycles = 0;
+ p->compa_next = 0;
+
+ avr_core_watch_write(avr, addr, v);
+ long clock = avr->frequency;
+ if (avr_regbit_get(avr, p->as2))
+ clock = 32768;
+ uint8_t cs = avr_regbit_get_array(avr, p->cs, ARRAY_SIZE(p->cs));
+ if (cs == 0) {
+ printf("%s-%c clock turned off\n", __FUNCTION__, p->name);
+ }
+ uint8_t mode = avr_regbit_get_array(avr, p->wgm, ARRAY_SIZE(p->wgm));
+ uint8_t cs_div = p->cs_div[cs];
+ uint16_t ocra = avr->data[p->r_ocra];
+ uint16_t ocrb = avr->data[p->r_ocrb];
+ long f = clock >> cs_div;
+ long fa = f / 2 / (ocra+1), fb = f / 2 / (ocrb+1);
+
+ printf("%s-%c clock f=%ld cs=%02x (div %d) = %ldhz\n", __FUNCTION__, p->name, clock, cs, 1 << cs_div, f);
+ printf("%s-%c wgm %d OCRA=%3d = %ldhz\n", __FUNCTION__, p->name, mode, ocra, fa);
+ printf("%s-%c wgm %d OCRB=%3d = %ldhz\n", __FUNCTION__, p->name, mode, ocrb, fb);
+
+ long cocra = ocra ? avr->frequency / fa : 0;
+ p->compa_cycles = cocra;
+ printf("%s-%c A %ld/%ld = cycles = %ld\n", __FUNCTION__, p->name, (long)avr->frequency, fa, cocra);
+
+}
+
+static void avr_timer8_reset(avr_t * avr, avr_io_t * port)
+{
+}
+
+static avr_io_t _io = {
+ .kind = "timer8",
+ .run = avr_timer8_run,
+ .reset = avr_timer8_reset,
+};
+
+void avr_timer8_init(avr_t * avr, avr_timer8_t * p)
+{
+ p->io = _io;
+ printf("%s timer%c created\n", __FUNCTION__, p->name);
+
+ avr_register_io(avr, &p->io);
+// avr_register_vector(avr, &port->pcint);
+
+ avr_register_io_write(avr, p->cs[0].reg, avr_timer8_write, p);
+ avr_register_io_write(avr, p->r_ocra, avr_timer8_write, p);
+ avr_register_io_write(avr, p->r_ocrb, avr_timer8_write, p);
+ //avr_register_io_read(avr, port->r_pin, avr_ioport_read, port);
+}
--- /dev/null
+/*
+ avr_timer8.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef AVR_TIMER8_H_
+#define AVR_TIMER8_H_
+
+#include "simavr.h"
+
+typedef struct avr_timer8_t {
+ avr_io_t io;
+ char name;
+ avr_regbit_t disabled; // bit in the PRR
+
+ uint8_t r_ocra, r_ocrb, r_ocrc, r_tcnt;
+
+ avr_regbit_t wgm[4];
+ avr_regbit_t cs[4];
+ uint8_t cs_div[16];
+ avr_regbit_t as2; // asynchronous clock 32khz
+
+ avr_int_vector_t compa; // comparator A
+ avr_int_vector_t compb; // comparator A
+ avr_int_vector_t overflow; // overflow
+
+
+ uint64_t compa_cycles, compa_next;
+} avr_timer8_t;
+
+void avr_timer8_init(avr_t * avr, avr_timer8_t * port);
+
+#endif /* AVR_TIMER8_H_ */
--- /dev/null
+/*
+ avr_uart.c
+
+ Handles UART access
+ Right now just handle "write" to the serial port at any speed
+ and printf to the console when '\n' is written.
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include "avr_uart.h"
+
+static void avr_uart_run(avr_t * avr, avr_io_t * port)
+{
+// printf("%s\n", __FUNCTION__);
+}
+
+static uint8_t avr_uart_read(struct avr_t * avr, uint8_t addr, void * param)
+{
+// avr_uart_t * p = (avr_uart_t *)param;
+ uint8_t v = avr->data[addr];
+// printf("** PIN%c = %02x\n", p->name, v);
+ return v;
+}
+
+static void avr_uart_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param)
+{
+ avr_uart_t * p = (avr_uart_t *)param;
+
+ if (addr == p->r_udr) {
+ // printf("UDR%c(%02x) = %02x\n", p->name, addr, v);
+ avr_core_watch_write(avr, addr, v);
+ avr_regbit_set(avr, p->udre);
+
+ static char buf[128];
+ static int l = 0;
+ buf[l++] = v < ' ' ? '.' : v;
+ buf[l] = 0;
+ if (v == '\n' || l == 127) {
+ l = 0;
+ printf("\e[32m%s\e[0m\n", buf);
+ }
+ }
+}
+
+void avr_uart_reset(avr_t * avr, struct avr_io_t *io)
+{
+ avr_uart_t * p = (avr_uart_t *)io;
+ avr_regbit_set(avr, p->udre);
+}
+
+static avr_io_t _io = {
+ .kind = "uart",
+ .run = avr_uart_run,
+ .reset = avr_uart_reset,
+};
+
+void avr_uart_init(avr_t * avr, avr_uart_t * p)
+{
+ p->io = _io;
+ avr_register_io(avr, &p->io);
+
+ printf("%s UART%c UDR=%02x\n", __FUNCTION__, p->name, p->r_udr);
+
+ avr_register_io_write(avr, p->r_udr, avr_uart_write, p);
+ avr_register_io_read(avr, p->r_udr, avr_uart_read, p);
+
+}
+
--- /dev/null
+/*
+ avr_uart.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef AVR_UART_H_
+#define AVR_UART_H_
+
+#include "simavr.h"
+
+typedef struct avr_uart_t {
+ avr_io_t io;
+ char name;
+ avr_regbit_t disabled; // bit in the PRR
+
+ uint8_t r_udr;
+ uint8_t r_ucsra;
+ uint8_t r_ucsrb;
+ uint8_t r_ucsrc;
+
+ uint8_t r_ubrrl,r_ubrrh;
+
+ avr_int_vector_t rxc;
+ avr_int_vector_t txc;
+ avr_int_vector_t udrc;
+
+ avr_regbit_t udre; // AVR_IO_REGBIT(UCSR0A, UDRE0),
+
+} avr_uart_t;
+
+void avr_uart_init(avr_t * avr, avr_uart_t * port);
+
+#endif /* AVR_UART_H_ */
--- /dev/null
+/*
+ sim_core.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include "simavr.h"
+#include "sim_core.h"
+
+// SREG bit names
+const char * _sreg_bit_name = "cznvshti";
+
+/*
+ * Handle "touching" registers, marking them changed.
+ * This is used only for debugging purposes to be able to
+ * print the effects of each instructions on registers
+ */
+#define REG_TOUCH(a, r) (a)->touched[(r) >> 5] |= (1 << ((r) & 0x1f))
+#define REG_ISTOUCHED(a, r) ((a)->touched[(r) >> 5] & (1 << ((r) & 0x1f)))
+
+/*
+ * This allows a "special case" to skip indtruction tracing when in these
+ * symbols. since printf() is useful to have, but generates a lot of cycles
+ */
+int dont_trace(const char * name)
+{
+ return (
+ !strcmp(name, "uart_putchar") ||
+ !strcmp(name, "fputc") ||
+ !strcmp(name, "printf") ||
+ !strcmp(name, "vfprintf") ||
+ !strcmp(name, "__ultoa_invert") ||
+ !strcmp(name, "__prologue_saves__") ||
+ !strcmp(name, "__epilogue_restores__"));
+}
+
+int donttrace = 0;
+
+#define STATE(_f, args...) { \
+ if (avr->trace) {\
+ if (avr->codeline[avr->pc>>1]) {\
+ const char * symn = avr->codeline[avr->pc>>1]->symbol; \
+ int dont = 0 && dont_trace(symn);\
+ if (dont!=donttrace) { \
+ donttrace = dont;\
+ DUMP_REG();\
+ }\
+ if (donttrace==0)\
+ printf("%04x: %-25s " _f, avr->pc, symn, ## args);\
+ } else \
+ printf("%s: %04x: " _f, __FUNCTION__, avr->pc, ## args);\
+ }\
+ }
+#define SREG() if (avr->trace && donttrace == 0) {\
+ printf("%04x: \t\t\t\t\t\t\t\t\tSREG = ", avr->pc); \
+ for (int _sbi = 0; _sbi < 8; _sbi++)\
+ printf("%c", avr->sreg[_sbi] ? toupper(_sreg_bit_name[_sbi]) : '.');\
+ printf("\n");\
+}
+
+/*
+ * Set a register (r < 256)
+ * if it's an IO regisrer (> 31) also (try to) call any callback that was
+ * registered to track changes to that register.
+ */
+static inline void _avr_set_r(avr_t * avr, uint8_t r, uint8_t v)
+{
+ REG_TOUCH(avr, r);
+
+ if (r == R_SREG) {
+ avr->data[r] = v;
+ // unsplit the SREG
+ for (int i = 0; i < 8; i++)
+ avr->sreg[i] = (avr->data[R_SREG] & (1 << i)) != 0;
+ SREG();
+ }
+ if (r > 31) {
+ uint8_t io = AVR_DATA_TO_IO(r);
+ if (avr->iow[io].w)
+ avr->iow[io].w(avr, r, v, avr->iow[io].param);
+ else
+ avr->data[r] = v;
+ } else
+ avr->data[r] = v;
+}
+
+/*
+ * Stack pointer access
+ */
+inline uint16_t _avr_sp_get(avr_t * avr)
+{
+ return avr->data[R_SPL] | (avr->data[R_SPH] << 8);
+}
+
+inline void _avr_sp_set(avr_t * avr, uint16_t sp)
+{
+ _avr_set_r(avr, R_SPL, sp);
+ _avr_set_r(avr, R_SPH, sp >> 8);
+}
+
+/*
+ * Set any address to a value; split between registers and SRAM
+ */
+static inline void _avr_set_ram(avr_t * avr, uint16_t addr, uint8_t v)
+{
+ if (addr < 256)
+ _avr_set_r(avr, addr, v);
+ else
+ avr_core_watch_write(avr, addr, v);
+}
+
+/*
+ * Get a value from SRAM.
+ */
+static inline uint8_t _avr_get_ram(avr_t * avr, uint16_t addr)
+{
+ if (addr > 31 && addr < 256) {
+ uint8_t io = AVR_DATA_TO_IO(addr);
+ if (avr->ior[io].r)
+ avr->data[addr] = avr->ior[io].r(avr, addr, avr->ior[io].param);
+ }
+ return avr_core_watch_read(avr, addr);
+}
+
+/*
+ * Stack oush accessors. Push/pop 8 and 16 bits
+ */
+static inline void _avr_push8(avr_t * avr, uint16_t v)
+{
+ uint16_t sp = _avr_sp_get(avr);
+ _avr_set_ram(avr, sp, v);
+ _avr_sp_set(avr, sp-1);
+}
+
+static inline uint8_t _avr_pop8(avr_t * avr)
+{
+ uint16_t sp = _avr_sp_get(avr) + 1;
+ uint8_t res = _avr_get_ram(avr, sp);
+ _avr_sp_set(avr, sp);
+ return res;
+}
+
+inline void _avr_push16(avr_t * avr, uint16_t v)
+{
+ _avr_push8(avr, v >> 8);
+ _avr_push8(avr, v);
+}
+
+static inline uint16_t _avr_pop16(avr_t * avr)
+{
+ uint16_t res = _avr_pop8(avr);
+ res |= _avr_pop8(avr) << 8;
+ return res;
+}
+
+/*
+ * "Pretty" register names
+ */
+const char * reg_names[255] = {
+ [R_XH] = "XH", [R_XL] = "XL",
+ [R_YH] = "YH", [R_YL] = "YL",
+ [R_ZH] = "ZH", [R_ZL] = "ZL",
+ [R_SPH] = "SPH", [R_SPL] = "SPL",
+ [R_SREG] = "SREG",
+};
+
+
+const char * avr_regname(uint8_t reg)
+{
+ if (!reg_names[reg]) {
+ char tt[16];
+ if (reg < 32)
+ sprintf(tt, "r%d", reg);
+ else
+ sprintf(tt, "io:%02x", reg);
+ reg_names[reg] = strdup(tt);
+ }
+ return reg_names[reg];
+}
+
+/*
+ * Called when an invalid opcode is decoded
+ */
+static void _avr_invalid_opcode(avr_t * avr)
+{
+ printf("\e[31m*** %04x: %-25s Invalid Opcode SP=%04x O=%04x \e[0m\n",
+ avr->pc, avr->codeline[avr->pc>>1]->symbol, _avr_sp_get(avr), avr->flash[avr->pc] | (avr->flash[avr->pc+1]<<8));
+}
+
+/*
+ * Dump changed registers when tracing
+ */
+void avr_dump_state(avr_t * avr)
+{
+ if (!avr->trace || donttrace)
+ return;
+
+ int doit = 0;
+
+ for (int r = 0; r < 3 && !doit; r++)
+ if (avr->touched[r])
+ doit = 1;
+ if (!doit)
+ return;
+ printf(" ->> ");
+ const int r16[] = { R_SPL, R_XL, R_YL, R_ZL };
+ for (int i = 0; i < 4; i++)
+ if (REG_ISTOUCHED(avr, r16[i]) || REG_ISTOUCHED(avr, r16[i]+1)) {
+ REG_TOUCH(avr, r16[i]);
+ REG_TOUCH(avr, r16[i]+1);
+ }
+
+ for (int i = 0; i < 3*32; i++)
+ if (REG_ISTOUCHED(avr, i)) {
+ printf("%s=%02x ", avr_regname(i), avr->data[i]);
+ }
+ printf("\n");
+}
+
+#define get_r_d_10(o) \
+ const uint8_t r = ((o >> 5) & 0x10) | (o & 0xf); \
+ const uint8_t d = (o >> 4) & 0x1f;\
+ const uint8_t vd = avr->data[d], vr =avr->data[r];
+#define get_k_r16(o) \
+ const uint8_t r = 16 + ((o >> 4) & 0xf); \
+ const uint8_t k = ((o & 0x0f00) >> 4) | (o & 0xf);
+
+/*
+ * Add a "jump" address to the jump trace buffer
+ */
+#define TRACE_JUMP()\
+ avr->old[avr->old_pci].pc = avr->pc;\
+ avr->old[avr->old_pci].sp = _avr_sp_get(avr);\
+ avr->old_pci = (avr->old_pci + 1) & (OLD_PC_SIZE-1);\
+
+/****************************************************************************\
+ *
+ * Helper functions for calculating the status register bit values.
+ * See the Atmel data sheet for the instuction set for more info.
+ *
+\****************************************************************************/
+
+static uint8_t
+get_add_carry (uint8_t res, uint8_t rd, uint8_t rr, int b)
+{
+ uint8_t resb = res >> b & 0x1;
+ uint8_t rdb = rd >> b & 0x1;
+ uint8_t rrb = rr >> b & 0x1;
+ return (rdb & rrb) | (rrb & ~resb) | (~resb & rdb);
+}
+
+static uint8_t
+get_add_overflow (uint8_t res, uint8_t rd, uint8_t rr)
+{
+ uint8_t res7 = res >> 7 & 0x1;
+ uint8_t rd7 = rd >> 7 & 0x1;
+ uint8_t rr7 = rr >> 7 & 0x1;
+ return (rd7 & rr7 & ~res7) | (~rd7 & ~rr7 & res7);
+}
+
+static uint8_t
+get_sub_carry (uint8_t res, uint8_t rd, uint8_t rr, int b)
+{
+ uint8_t resb = res >> b & 0x1;
+ uint8_t rdb = rd >> b & 0x1;
+ uint8_t rrb = rr >> b & 0x1;
+ return (~rdb & rrb) | (rrb & resb) | (resb & ~rdb);
+}
+
+static uint8_t
+get_sub_overflow (uint8_t res, uint8_t rd, uint8_t rr)
+{
+ uint8_t res7 = res >> 7 & 0x1;
+ uint8_t rd7 = rd >> 7 & 0x1;
+ uint8_t rr7 = rr >> 7 & 0x1;
+ return (rd7 & ~rr7 & ~res7) | (~rd7 & rr7 & res7);
+}
+
+static uint8_t
+get_compare_carry (uint8_t res, uint8_t rd, uint8_t rr, int b)
+{
+ uint8_t resb = (res >> b) & 0x1;
+ uint8_t rdb = (rd >> b) & 0x1;
+ uint8_t rrb = (rr >> b) & 0x1;
+ return (~rdb & rrb) | (rrb & resb) | (resb & ~rdb);
+}
+
+static uint8_t
+get_compare_overflow (uint8_t res, uint8_t rd, uint8_t rr)
+{
+ res >>= 7; rd >>= 7; rr >>= 7;
+ /* The atmel data sheet says the second term is ~rd7 for CP
+ * but that doesn't make any sense. You be the judge. */
+ return (rd & ~rr & ~res) | (~rd & rr & res);
+}
+
+/*
+ * Main opcode decoder
+ *
+ * The decoder was written by following the datasheet in no particular order.
+ * As I went along, I noticed "bit patterns" that could be used to factor opcodes
+ * However, a lot of these only becane apparent later on, so SOME instructions
+ * (skip of bit set etc) are compact, and some could use some refactoring (the ALU
+ * ones scream to be factored).
+ * I assume that the decoder could easily be 2/3 of it's current size.
+ *
+ * The core 'almost' work. There is a case where it munches the stack, problem to be
+ * debugged.
+ *
+ * It lacks a couple of multiply instructions, and the "extended" XMega jumps.
+ *
+ * for now all instructions take "one" cycle, the cycle+=<extra> needs to be added.
+ */
+uint16_t avr_run_one(avr_t * avr)
+{
+ /*
+ * this traces spurious reset or bad jump/opcodes and dumps the last 32 "jumps" to track it down
+ */
+ if ((avr->pc == 0 && avr->cycle > 0) || avr->pc >= avr->codeend) {
+ avr->trace = 1;
+ STATE("RESET\n");
+ CRASH();
+ }
+
+ uint32_t opcode = (avr->flash[avr->pc + 1] << 8) | avr->flash[avr->pc];
+ uint32_t new_pc = avr->pc + 2; // future "default" pc
+ int cycle = 1;
+
+ avr->touched[0] = avr->touched[1] = avr->touched[2] = 0;
+
+ switch (opcode & 0xf000) {
+ case 0x0000: {
+ switch (opcode) {
+ case 0x0000: { // NOP
+ STATE("nop\n");
+ } break;
+ default: {
+ switch (opcode & 0xfc00) {
+ case 0x0400: { // CPC compare with carry 0000 01rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd - vr - avr->sreg[S_C];
+ STATE("cpc %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ if (res)
+ avr->sreg[S_Z] = 0;
+ avr->sreg[S_H] = get_compare_carry(res, vd, vr, 3);
+ avr->sreg[S_V] = get_compare_overflow(res, vd, vr);
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_C] = get_compare_carry(res, vd, vr, 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x0c00: { // ADD without carry 0000 11 rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd + vr;
+ if (r == d) {
+ STATE("lsl %s[%02x] = %02x\n", avr_regname(d), vd, res & 0xff);
+ } else {
+ STATE("add %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ }
+ _avr_set_r(avr, d, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_H] = get_add_carry(res, vd, vr, 3);
+ avr->sreg[S_V] = get_add_overflow(res, vd, vr);
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_C] = get_add_carry(res, vd, vr, 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x0800: { // SBC substract with carry 0000 10rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd - vr - avr->sreg[S_C];
+ STATE("sbc %s[%02x], %s[%02x] = %02x\n", avr_regname(d), avr->data[d], avr_regname(r), avr->data[r], res);
+ _avr_set_r(avr, d, res);
+ if (res)
+ avr->sreg[S_Z] = 0;
+ avr->sreg[S_H] = get_sub_carry(res, vd, vr, 3);
+ avr->sreg[S_V] = get_sub_overflow(res, vd, vr);
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_C] = get_sub_carry(res, vd, vr, 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ default:
+ switch (opcode & 0xff00) {
+ case 0x0100: { // MOVW – Copy Register Word 0000 0001 dddd rrrr
+ uint8_t d = ((opcode >> 4) & 0xf) << 1;
+ uint8_t r = ((opcode) & 0xf) << 1;
+ STATE("movw %s:%s, %s:%s[%02x%02x]\n", avr_regname(d), avr_regname(d+1), avr_regname(r), avr_regname(r+1), avr->data[r+1], avr->data[r]);
+ _avr_set_r(avr, d, avr->data[r]);
+ _avr_set_r(avr, d+1, avr->data[r+1]);
+ } break;
+ default: _avr_invalid_opcode(avr);
+ }
+ }
+ }
+ }
+ } break;
+
+ case 0x1000: {
+ switch (opcode & 0xfc00) {
+ case 0x1800: { // SUB without carry 0000 10 rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd - vr;
+ STATE("sub %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ _avr_set_r(avr, d, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_H] = get_sub_carry(res, vd, vr, 3);
+ avr->sreg[S_V] = get_sub_overflow(res, vd, vr);
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_C] = get_sub_carry(res, vd, vr, 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x1000: { // CPSE Compare, skip if equal 0000 10 rd dddd rrrr
+ get_r_d_10(opcode);
+ uint16_t res = vd == vr;
+ STATE("cpse %s[%02x], %s[%02x]\t; Will%s skip\n", avr_regname(d), avr->data[d], avr_regname(r), avr->data[r], res ? "":"not ");
+ if (res)
+ new_pc += 2;
+ } break;
+ case 0x1400: { // CP Compare 0000 10 rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd - vr;
+ STATE("cp %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_H] = get_compare_carry(res, vd, vr, 3);
+ avr->sreg[S_V] = get_compare_overflow(res, vd, vr);
+ avr->sreg[S_N] = res >> 7;
+ avr->sreg[S_C] = get_compare_carry(res, vd, vr, 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x1c00: { // ADD with carry 0001 11 rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd + vr + avr->sreg[S_C];
+ if (r == d) {
+ STATE("rol %s[%02x] = %02x\n", avr_regname(d), avr->data[d], res);
+ } else {
+ STATE("addc %s[%02x], %s[%02x] = %02x\n", avr_regname(d), avr->data[d], avr_regname(r), avr->data[r], res);
+ }
+ _avr_set_r(avr, d, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_H] = get_add_carry(res, vd, vr, 3);
+ avr->sreg[S_V] = get_add_overflow(res, vd, vr);
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_C] = get_add_carry(res, vd, vr, 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ default:
+ switch (opcode & 0xff00) {
+ case 0x0200: { // MULS – Multiply Signed 0000 0010 dddd rrrr
+ int8_t r = opcode & 0xf;
+ int8_t d = (opcode >> 4) & 0xf;
+ int16_t res = ((int8_t)avr->data[r]) * ((int8_t)avr->data[d]);
+ STATE("muls %s[%d], %s[%02x] = %d\n", avr_regname(d), ((int8_t)avr->data[d]), avr_regname(r), ((int8_t)avr->data[r]), res);
+ _avr_set_r(avr, 0, res);
+ _avr_set_r(avr, 1, res >> 8);
+ avr->sreg[S_C] = (res >> 15) & 1;
+ avr->sreg[S_Z] = res == 0;
+ SREG();
+ } break;
+ default: _avr_invalid_opcode(avr);
+ }
+ }
+ } break;
+
+ case 0x2000: {
+ switch (opcode & 0xfc00) {
+ case 0x2000: { // AND 0010 00rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd & vr;
+ if (r == d) {
+ STATE("tst %s[%02x]\n", avr_regname(d), avr->data[d]);
+ } else {
+ STATE("and %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ }
+ _avr_set_r(avr, d, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_V] = 0;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x2400: { // EOR 0010 01rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd ^ vr;
+ if (r==d) {
+ STATE("clr %s[%02x]\n", avr_regname(d), avr->data[d]);
+ } else {
+ STATE("eor %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ }
+ _avr_set_r(avr, d, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_V] = 0;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x2800: { // OR Logical OR 0010 10rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vd | vr;
+ STATE("or %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ _avr_set_r(avr, d, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_V] = 0;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x2c00: { // MOV 0010 11rd dddd rrrr
+ get_r_d_10(opcode);
+ uint8_t res = vr;
+ STATE("mov %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ _avr_set_r(avr, d, res);
+ } break;
+ default: _avr_invalid_opcode(avr);
+ }
+ } break;
+
+ case 0x3000: { // CPI 0011 KKKK rrrr KKKK
+ get_k_r16(opcode);
+ uint8_t vr = avr->data[r];
+ uint8_t res = vr - k;
+ STATE("cpi %s[%02x], 0x%02x\n", avr_regname(r), vr, k);
+
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_H] = get_compare_carry(res, vr, k, 3);
+ avr->sreg[S_V] = get_compare_overflow(res, vr, k);
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_C] = get_compare_carry(res, vr, k, 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+
+ case 0x4000: { // SBCI Subtract Immediate With Carry 0101 10 kkkk dddd kkkk
+ get_k_r16(opcode);
+ uint8_t vr = avr->data[r];
+ uint8_t res = vr - k - avr->sreg[S_C];
+ STATE("sbci %s[%02x], 0x%02x = %02x\n", avr_regname(r), avr->data[r], k, res);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_C] = (k + avr->sreg[S_C]) > vr;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+
+ case 0x5000: { // SUB Subtract Immediate 0101 10 kkkk dddd kkkk
+ get_k_r16(opcode);
+ uint8_t vr = avr->data[r];
+ uint8_t res = vr - k;
+ STATE("subi %s[%02x], 0x%02x = %02x\n", avr_regname(r), avr->data[r], k, res);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_C] = k > vr;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+
+ case 0x6000: { // ORI aka SBR Logical AND with Immediate 0110 kkkk dddd kkkk
+ get_k_r16(opcode);
+ uint8_t res = avr->data[r] | k;
+ STATE("ori %s[%02x], 0x%02x\n", avr_regname(r), avr->data[r], k);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_V] = 0;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+
+ case 0x7000: { // ANDI Logical AND with Immediate 0111 kkkk dddd kkkk
+ get_k_r16(opcode);
+ uint8_t res = avr->data[r] & k;
+ STATE("andi %s[%02x], 0x%02x\n", avr_regname(r), avr->data[r], k);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = (res >> 7) & 1;
+ avr->sreg[S_V] = 0;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+
+ case 0xa000:
+ case 0x8000: {
+ switch (opcode & 0xd008) {
+ case 0xa000:
+ case 0x8000: { // LD (LDD) – Load Indirect using Z 10q0 qq0r rrrr 0qqq
+ uint16_t v = avr->data[R_ZL] | (avr->data[R_ZH] << 8);
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t q = ((opcode & 0x2000) >> 7) | ((opcode & 0x0c00) >> 7) | (opcode & 0x7);
+
+ if (opcode & 0x0200) {
+ STATE("st (Z+%d[%04x]), %s[%02x]\n", q, v+q, avr_regname(r), avr->data[r]);
+ _avr_set_ram(avr, v+q, avr->data[r]);
+ } else {
+ STATE("ld %s, (Z+%d[%04x])=[%02x]\n", avr_regname(r), q, v+q, avr->data[v+q]);
+ _avr_set_r(avr, r, _avr_get_ram(avr, v+q));
+ }
+ } break;
+ case 0xa008:
+ case 0x8008: { // LD (LDD) – Load Indirect using Y 10q0 qq0r rrrr 1qqq
+ uint16_t v = avr->data[R_YL] | (avr->data[R_YH] << 8);
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t q = ((opcode & 0x2000) >> 7) | ((opcode & 0x0c00) >> 7) | (opcode & 0x7);
+
+ if (opcode & 0x0200) {
+ STATE("st (Y+%d[%04x]), %s[%02x]\n", q, v+q, avr_regname(r), avr->data[r]);
+ _avr_set_ram(avr, v+q, avr->data[r]);
+ } else {
+ STATE("ld %s, (Y+%d[%04x])=[%02x]\n", avr_regname(r), q, v+q, avr->data[v+q]);
+ _avr_set_r(avr, r, _avr_get_ram(avr, v+q));
+ }
+ } break;
+ default: _avr_invalid_opcode(avr);
+ }
+ } break;
+
+ case 0x9000: {
+ /* this is an annoying special case, but at least these lines handle all the SREG set/clear opcodes */
+ if ((opcode & 0xff0f) == 0x9408) {
+ uint8_t b = (opcode >> 4) & 7;
+ STATE("%s%c\n", opcode & 0x0080 ? "cl" : "se", _sreg_bit_name[b]);
+ avr->sreg[b] = (opcode & 0x0080) == 0;
+ SREG();
+ } else switch (opcode) {
+ case 0x9588: { // SLEEP
+ STATE("sleep\n");
+ avr->state = cpu_Sleeping;
+ } break;
+ case 0x9598: { // BREAK
+ STATE("break\n");
+ } break;
+ case 0x95a8: { // WDR
+ STATE("wdr\n");
+ } break;
+ case 0x9409: { // IJMP Indirect jump
+ uint16_t z = avr->data[R_ZL] | (avr->data[R_ZH] << 8);
+ STATE("ijmp Z[%04x]\n", z << 1);
+ new_pc = z << 1;
+ TRACE_JUMP();
+ } break;
+ case 0x9509: { // ICALL Indirect Call to Subroutine
+ uint16_t z = avr->data[R_ZL] | (avr->data[R_ZH] << 8);
+ STATE("icall Z[%04x]\n", z << 1);
+
+ _avr_push16(avr, new_pc >> 1);
+ new_pc = z << 1;
+ TRACE_JUMP();
+ } break;
+ case 0x9518: // RETI
+ case 0x9508: { // RET
+ new_pc = _avr_pop16(avr) << 1;
+ if (opcode & 0x10) // reti
+ avr->sreg[S_I] = 1;
+ STATE("ret%s\n", opcode & 0x10 ? "i" : "");
+ TRACE_JUMP();
+ } break;
+ case 0x95c8: { // LPM Load Program Memory R0 <- (Z)
+ uint16_t z = avr->data[R_ZL] | (avr->data[R_ZH] << 8);
+ STATE("lpm %s, (Z[%04x])\n", avr_regname(0), z);
+ _avr_set_r(avr, 0, avr->flash[z]);
+ } break;
+ case 0x9408:case 0x9418:case 0x9428:case 0x9438:case 0x9448:case 0x9458:case 0x9468:
+ case 0x9478:
+ { // BSET 1001 0100 0ddd 1000
+ uint8_t b = (opcode >> 4) & 7;
+ avr->sreg[b] = 1;
+ STATE("bset %c\n", _sreg_bit_name[b]);
+ SREG();
+ } break;
+ case 0x9488:case 0x9498:case 0x94a8:case 0x94b8:case 0x94c8:case 0x94d8:case 0x94e8:
+ case 0x94f8:
+ { // BSET 1001 0100 0ddd 1000
+ uint8_t b = (opcode >> 4) & 7;
+ avr->sreg[b] = 0;
+ STATE("bclr %c\n", _sreg_bit_name[b]);
+ SREG();
+ } break;
+ default: {
+ switch (opcode & 0xfe0f) {
+ case 0x9005:
+ case 0x9004: { // LPM Load Program Memory 1001 000d dddd 01oo
+ uint16_t z = avr->data[R_ZL] | (avr->data[R_ZH] << 8);
+ uint8_t r = (opcode >> 4) & 0x1f;
+ int op = opcode & 3;
+ STATE("lpm %s, (Z[%04x]%s)\n", avr_regname(r), z, opcode?"+":"");
+ _avr_set_r(avr, r, avr->flash[z]);
+ if (op == 1) {
+ z++;
+ _avr_set_r(avr, R_ZH, z >> 8);
+ _avr_set_r(avr, R_ZL, z);
+ }
+ } break;
+ case 0x900c:
+ case 0x900d:
+ case 0x900e: { // LD Load Indirect from Data using X 1001 000r rrrr 11oo
+ int op = opcode & 3;
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint16_t x = (avr->data[R_XH] << 8) | avr->data[R_XL];
+ STATE("ld %s, %sX[%04x]%s\n", avr_regname(r), op == 2 ? "--" : "", x, op == 1 ? "++" : "");
+
+ if (op == 2) x--;
+ _avr_set_r(avr, r, _avr_get_ram(avr, x));
+ if (op == 1) x++;
+ _avr_set_r(avr, R_XH, x >> 8);
+ _avr_set_r(avr, R_XL, x);
+ } break;
+ case 0x920c:
+ case 0x920d:
+ case 0x920e: { // ST Store Indirect Data Space X 1001 001r rrrr 11oo
+ int op = opcode & 3;
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint16_t x = (avr->data[R_XH] << 8) | avr->data[R_XL];
+ STATE("st %sX[%04x]%s, %s[%02x] \n", op == 2 ? "--" : "", x, op == 1 ? "++" : "", avr_regname(r), avr->data[r]);
+
+ if (op == 2) x--;
+ _avr_set_ram(avr, x, avr->data[r]);
+ if (op == 1) x++;
+ _avr_set_r(avr, R_XH, x >> 8);
+ _avr_set_r(avr, R_XL, x);
+ } break;
+ case 0x9009:
+ case 0x900a: { // LD Load Indirect from Data using Y 1001 000r rrrr 10oo
+ int op = opcode & 3;
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint16_t y = (avr->data[R_YH] << 8) | avr->data[R_YL];
+ STATE("ld %s, %sY[%04x]%s\n", avr_regname(r), op == 2 ? "--" : "", y, op == 1 ? "++" : "");
+
+ if (op == 2) y--;
+ _avr_set_r(avr, r, _avr_get_ram(avr, y));
+ if (op == 1) y++;
+ _avr_set_r(avr, R_YH, y >> 8);
+ _avr_set_r(avr, R_YL, y);
+ } break;
+ case 0x9209:
+ case 0x920a: { // ST Store Indirect Data Space Y 1001 001r rrrr 10oo
+ int op = opcode & 3;
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint16_t y = (avr->data[R_YH] << 8) | avr->data[R_YL];
+ STATE("st %sY[%04x]%s, %s[%02x] \n", op == 2 ? "--" : "", y, op == 1 ? "++" : "", avr_regname(r), avr->data[r]);
+
+ if (op == 2) y--;
+ _avr_set_ram(avr, y, avr->data[r]);
+ if (op == 1) y++;
+ _avr_set_r(avr, R_YH, y >> 8);
+ _avr_set_r(avr, R_YL, y);
+ } break;
+ case 0x9200: { // STS ! Store Direct to Data Space, 32 bits
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint16_t x = (avr->flash[new_pc+1] << 8) | avr->flash[new_pc];
+ new_pc += 2;
+ STATE("sts 0x%04x, %s[%02x]\n", x, avr_regname(r), avr->data[r]);
+ _avr_set_ram(avr, x, avr->data[r]);
+ } break;
+ case 0x9001:
+ case 0x9002: { // LD Load Indirect from Data using Z 1001 001r rrrr 00oo
+ int op = opcode & 3;
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint16_t z = (avr->data[R_ZH] << 8) | avr->data[R_ZL];
+ STATE("ld %s, %sZ[%04x]%s\n", avr_regname(r), op == 2 ? "--" : "", z, op == 1 ? "++" : "");
+
+ if (op == 2) z--;
+ _avr_set_r(avr, r, _avr_get_ram(avr, z));
+ if (op == 1) z++;
+ _avr_set_r(avr, R_ZH, z >> 8);
+ _avr_set_r(avr, R_ZL, z);
+ } break;
+ case 0x9201:
+ case 0x9202: { // ST Store Indirect Data Space Z 1001 001r rrrr 00oo
+ int op = opcode & 3;
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint16_t z = (avr->data[R_ZH] << 8) | avr->data[R_ZL];
+ STATE("st %sZ[%04x]%s, %s[%02x] \n", op == 2 ? "--" : "", z, op == 1 ? "++" : "", avr_regname(r), avr->data[r]);
+
+ if (op == 2) z--;
+ _avr_set_ram(avr, z, avr->data[r]);
+ if (op == 1) z++;
+ _avr_set_r(avr, R_ZH, z >> 8);
+ _avr_set_r(avr, R_ZL, z);
+ } break;
+ case 0x900f: { // POP 1001 000d dddd 1111
+ uint8_t r = (opcode >> 4) & 0x1f;
+ _avr_set_r(avr, r, _avr_pop8(avr));
+ uint16_t sp = _avr_sp_get(avr);
+ STATE("pop %s (@%04x)[%02x]\n", avr_regname(r), sp, avr->data[sp]);
+ } break;
+ case 0x920f: { // PUSH 1001 001d dddd 1111
+ uint8_t r = (opcode >> 4) & 0x1f;
+ _avr_push8(avr, avr->data[r]);
+ uint16_t sp = _avr_sp_get(avr);
+ STATE("push %s[%02x] (@%04x)\n", avr_regname(r), avr->data[r], sp);
+ } break;
+ case 0x9000: { // LDS Load Direct from Data Space, 32 bits
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint16_t x = (avr->flash[new_pc+1] << 8) | avr->flash[new_pc];
+ new_pc += 2;
+ STATE("lds %s[%02x], 0x%04x\n", avr_regname(r), avr->data[r], x);
+ _avr_set_r(avr, r, _avr_get_ram(avr, x));
+ } break;
+ case 0x9400: { // COM – One’s Complement
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t res = 0xff - avr->data[r];
+ STATE("com %s[%02x] = %02x\n", avr_regname(r), avr->data[r], res);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = res >> 7;
+ avr->sreg[S_V] = 0;
+ avr->sreg[S_C] = 1;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x9401: { // NEG – One’s Complement
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t rd = avr->data[r];
+ uint8_t res = 0x00 - rd;
+ STATE("neg %s[%02x] = %02x\n", avr_regname(r), rd, res);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_H] = ((res >> 3) | (rd >> 3)) & 1;
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = res >> 7;
+ avr->sreg[S_V] = res == 0x80;
+ avr->sreg[S_C] = res != 0;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x9402: { // SWAP – Swap Nibbles
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t res = (avr->data[r] >> 4) | (avr->data[r] << 4) ;
+ STATE("swap %s[%02x] = %02x\n", avr_regname(r), avr->data[r], res);
+ _avr_set_r(avr, r, res);
+ } break;
+ case 0x9403: { // INC – Increment
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t res = avr->data[r] + 1;
+ STATE("inc %s[%02x] = %02x\n", avr_regname(r), avr->data[r], res);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = res >> 7;
+ avr->sreg[S_V] = res == 0x7f;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x9405: { // ASR – Arithmetic Shift Right 1001 010d dddd 0101
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t vr = avr->data[r];
+ uint8_t res = (vr >> 1) | (vr & 0x80);
+ STATE("asr %s[%02x]\n", avr_regname(r), vr);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_C] = vr & 1;
+ avr->sreg[S_N] = res >> 7;
+ avr->sreg[S_V] = avr->sreg[S_N] ^ avr->sreg[S_C];
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x9406: { // LSR 1001 010d dddd 0110
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t vr = avr->data[r];
+ uint8_t res = vr >> 1;
+ STATE("lsr %s[%02x]\n", avr_regname(r), vr);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_C] = vr & 1;
+ avr->sreg[S_N] = 0;
+ avr->sreg[S_V] = avr->sreg[S_N] ^ avr->sreg[S_C];
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x9407: { // ROR 1001 010d dddd 0111
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t vr = avr->data[r];
+ uint8_t res = (avr->sreg[S_C] ? 0x80 : 0) | vr >> 1;
+ STATE("ror %s[%02x]\n", avr_regname(r), vr);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_C] = vr & 1;
+ avr->sreg[S_N] = 0;
+ avr->sreg[S_V] = avr->sreg[S_N] ^ avr->sreg[S_C];
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x940a: { // DEC – Decrement
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t res = avr->data[r] - 1;
+ STATE("dec %s[%02x] = %02x\n", avr_regname(r), avr->data[r], res);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_N] = res >> 7;
+ avr->sreg[S_V] = res == 0x80;
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ } break;
+ case 0x940c:
+ case 0x940d: { // JMP Long Call to sub, 32 bits
+ uint32_t a = ((opcode & 0x01f0) >> 3) | (opcode & 1);
+ uint16_t x = (avr->flash[new_pc+1] << 8) | avr->flash[new_pc];
+ a = (a << 16) | x;
+ // printf("jmp %06x\n", a << 1);
+ STATE("jmp 0x%06x\n", a);
+ new_pc = a << 1;
+ TRACE_JUMP();
+ } break;
+ case 0x940e:
+ case 0x940f: { // CALL Long Call to sub, 32 bits
+ uint32_t a = ((opcode & 0x01f0) >> 3) | (opcode & 1);
+ uint16_t x = (avr->flash[new_pc+1] << 8) | avr->flash[new_pc];
+ a = (a << 16) | x;
+ // printf("call %06x\n", a << 1);
+ STATE("call 0x%06x\n", a);
+ new_pc += 2;
+ _avr_push16(avr, new_pc >> 1);
+ new_pc = a << 1;
+ TRACE_JUMP();
+ } break;
+
+ default: {
+ switch (opcode & 0xff00) {
+ case 0x9600: { // ADIW - Add Immediate to Word 1001 0110 KKdd KKKK
+ uint8_t r = 24 + ((opcode >> 3) & 0x6);
+ uint8_t k = ((opcode & 0x00c0) >> 2) | (opcode & 0xf);
+ uint8_t rdl = avr->data[r], rdh = avr->data[r+1];
+ uint32_t res = rdl | (rdh << 8);
+ STATE("adiw %s:%s[%04x], 0x%02x\n", avr_regname(r), avr_regname(r+1), res, k);
+ res += k;
+ _avr_set_r(avr, r + 1, res >> 8);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_V] = ~(rdh >> 7) & ((res >> 15) & 1);
+ avr->sreg[S_Z] = (res & 0xffff) == 0;
+ avr->sreg[S_N] = (res >> 15) & 1;
+ avr->sreg[S_C] = ~((res >> 15) & 1) & (rdh >> 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ cycle++;
+ } break;
+ case 0x9700: { // SBIW - Subtract Immediate from Word 1001 0110 KKdd KKKK
+ uint8_t r = 24 + ((opcode >> 3) & 0x6);
+ uint8_t k = ((opcode & 0x00c0) >> 2) | (opcode & 0xf);
+ uint8_t rdl = avr->data[r], rdh = avr->data[r+1];
+ uint32_t res = rdl | (rdh << 8);
+ STATE("sbiw %s:%s[%04x], 0x%02x\n", avr_regname(r), avr_regname(r+1), res, k);
+ res -= k;
+ _avr_set_r(avr, r + 1, res >> 8);
+ _avr_set_r(avr, r, res);
+ avr->sreg[S_V] = (rdh >> 7) & (~(res >> 15) & 1);
+ avr->sreg[S_Z] = (res & 0xffff) == 0;
+ avr->sreg[S_N] = (res >> 15) & 1;
+ avr->sreg[S_C] = ((res >> 15) & 1) & (~rdh >> 7);
+ avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];
+ SREG();
+ cycle++;
+ } break;
+ case 0x9800: { // CBI - Clear Bit in I/O Registe 1001 1000 AAAA Abbb
+ uint8_t io = ((opcode >> 3) & 0x1f) + 32;
+ uint8_t b = opcode & 0x7;
+ uint8_t res = _avr_get_ram(avr, io) & ~(1 << b);
+ STATE("cbi %s[%04x], 0x%02x = %02x\n", avr_regname(io), avr->data[io], 1<<b, res);
+ _avr_set_ram(avr, io, res);
+ } break;
+ case 0x9900: { // SBIC - Skip if Bit in I/O Register is Cleared 1001 0111 AAAA Abbb
+ uint8_t io = ((opcode >> 3) & 0x1f) + 32;
+ uint8_t b = opcode & 0x7;
+ uint8_t res = _avr_get_ram(avr, io) & (1 << b);
+ STATE("sbic %s[%04x], 0x%02x\t; Will%s branch\n", avr_regname(io), avr->data[io], 1<<b, !res?"":"not ");
+ if (!res)
+ new_pc += 2;
+ } break;
+ case 0x9a00: { // SBI - Set Bit in I/O Register 1001 1000 AAAA Abbb
+ uint8_t io = ((opcode >> 3) & 0x1f) + 32;
+ uint8_t b = opcode & 0x7;
+ uint8_t res = _avr_get_ram(avr, io) | (1 << b);
+ STATE("sbi %s[%04x], 0x%02x = %02x\n", avr_regname(io), avr->data[io], 1<<b, res);
+ _avr_set_ram(avr, io, res);
+ } break;
+ case 0x9b00: { // SBIS - Skip if Bit in I/O Register is Cleared 1001 0111 AAAA Abbb
+ uint8_t io = (opcode >> 3) & 0x1f;
+ uint8_t b = opcode & 0x7;
+ uint8_t res = _avr_get_ram(avr, io + 32) & (1 << b);
+ STATE("sbis %s[%04x], 0x%02x\t; Will%s branch\n", avr_regname(io), avr->data[io], 1<<b, res?"":"not ");
+ if (res)
+ new_pc += 2;
+ } break;
+ default:
+ switch (opcode & 0xfc00) {
+ case 0x9c00: { // MUL - Multiply Unsigned 1001 11rd dddd rrrr
+ get_r_d_10(opcode);
+ uint16_t res = vd * vr;
+ STATE("mul %s[%02x], %s[%02x] = %04x\n", avr_regname(d), vd, avr_regname(r), vr, res);
+ _avr_set_r(avr, 0, res);
+ _avr_set_r(avr, 1, res >> 8);
+ avr->sreg[S_Z] = res == 0;
+ avr->sreg[S_C] = (res >> 15) & 1;
+ SREG();
+ } break;
+ default: _avr_invalid_opcode(avr);
+ }
+ }
+ } break;
+ }
+ } break;
+ }
+ } break;
+
+ case 0xb000: {
+ switch (opcode & 0xf800) {
+ case 0xb800: { // OUT A,Rr 1011 1AAr rrrr AAAA
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t A = ((((opcode >> 9) & 3) << 4) | ((opcode) & 0xf)) + 32;
+ STATE("out %s, %s[%02x]\n", avr_regname(A), avr_regname(r), avr->data[r]);
+ // todo: store to IO register
+ _avr_set_ram(avr, A, avr->data[r]);
+ // avr->data[A] = ;
+ } break;
+ case 0xb000: { // IN Rd,A 1011 0AAr rrrr AAAA
+ uint8_t r = (opcode >> 4) & 0x1f;
+ uint8_t A = ((((opcode >> 9) & 3) << 4) | ((opcode) & 0xf)) + 32;
+ STATE("in %s, %s[%02x]\n", avr_regname(r), avr_regname(A), avr->data[A]);
+ // todo: get the IO register
+ _avr_set_r(avr, r, _avr_get_ram(avr, A));
+ } break;
+ default: _avr_invalid_opcode(avr);
+ }
+ } break;
+
+ case 0xc000: {
+ // RJMP 1100 kkkk kkkk kkkk
+ short o = ((short)(opcode << 4)) >> 4;
+ STATE("rjmp .%d [%04x]\n", o, new_pc + (o << 1));
+ new_pc = new_pc + (o << 1);
+ TRACE_JUMP();
+ } break;
+
+ case 0xd000: {
+ // RCALL 1100 kkkk kkkk kkkk
+ short o = ((short)(opcode << 4)) >> 4;
+ STATE("rcall .%d [%04x]\n", o, new_pc + (o << 1));
+ _avr_push16(avr, new_pc >> 1);
+ new_pc = new_pc + (o << 1);
+ TRACE_JUMP();
+ } break;
+
+ case 0xe000: { // LDI Rd, K 1110 KKKK RRRR KKKK -- aka SER (LDI r, 0xff)
+ uint8_t d = 16 + ((opcode >> 4) & 0xf);
+ uint8_t k = ((opcode & 0x0f00) >> 4) | (opcode & 0xf);
+ STATE("ldi %s, 0x%02x\n", avr_regname(d), k);
+ _avr_set_r(avr, d, k);
+ } break;
+
+ case 0xf000: {
+ switch (opcode & 0xfe00) {
+ case 0xf000:
+ case 0xf200:
+ case 0xf400:
+ case 0xf600: { // All the SREG branches
+ short o = ((short)(opcode << 6)) >> 9; // offset
+ uint8_t s = opcode & 7;
+ int set = (opcode & 0x0400) == 0; // this bit means BRXC otherwise BRXS
+ int branch = (avr->sreg[s] && set) || (!avr->sreg[s] && !set);
+ const char *names[2][8] = {
+ { "brcc", "brne", "brpl", "brvc", NULL, "brhc", "brtc", "brid"},
+ { "brcs", "breq", "brmi", "brvs", NULL, "brhs", "brts", "brie"},
+ };
+ if (names[set][s]) {
+ STATE("%s .%d [%04x]\t; Will%s branch\n", names[set][s], o, new_pc + (o << 1), branch ? "":" not");
+ } else {
+ STATE("%s%c .%d [%04x]\t; Will%s branch\n", set ? "brbs" : "brbc", _sreg_bit_name[s], o, new_pc + (o << 1), branch ? "":" not");
+ }
+ if (branch)
+ new_pc = new_pc + (o << 1);
+ } break;
+ case 0xf800:
+ case 0xf900: { // BLD – Bit Store from T into a Bit in Register 1111 100r rrrr 0bbb
+ uint8_t r = (opcode >> 4) & 0x1f; // register index
+ uint8_t s = opcode & 7;
+ uint8_t v = avr->data[r] | (avr->sreg[S_T] ? (1 << s) : 0);
+ STATE("bld %s[%02x], 0x%02x = %02x\n", avr_regname(r), avr->data[r], 1 << s, v);
+ _avr_set_r(avr, r, v);
+ } break;
+ case 0xfa00:
+ case 0xfb00:{ // BST – Bit Store into T from bit in Register 1111 100r rrrr 0bbb
+ uint8_t r = (opcode >> 4) & 0x1f; // register index
+ uint8_t s = opcode & 7;
+ STATE("bst %s[%02x], 0x%02x\n", avr_regname(r), avr->data[r], 1 << s);
+ avr->sreg[S_T] = (avr->data[r] >> s) & 1;
+ SREG();
+ } break;
+ case 0xfc00:
+ case 0xfe00: { // SBRS/SBRC – Skip if Bit in Register is Set/Clear 1111 11sr rrrr 0bbb
+ uint8_t r = (opcode >> 4) & 0x1f; // register index
+ uint8_t s = opcode & 7;
+ int set = (opcode & 0x0200) != 0;
+ int branch = ((avr->data[r] & (1 << s)) && set) || (!(avr->data[r] & (1 << s)) && !set);
+ STATE("%s %s[%02x], 0x%02x\t; Will%s branch\n", set ? "sbrs" : "sbrc", avr_regname(r), avr->data[r], 1 << s, branch ? "":" not");
+ if (branch)
+ new_pc = new_pc + 2;
+ } break;
+ default: _avr_invalid_opcode(avr);
+ }
+ } break;
+
+ default: _avr_invalid_opcode(avr);
+
+ }
+ avr->cycle += cycle;
+ return new_pc;
+}
+
+
--- /dev/null
+/*
+ sim_core.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SIM_CORE_H_
+#define SIM_CORE_H_
+
+/*
+ * Instruction decoder, run ONE instruction
+ */
+uint16_t avr_run_one(avr_t * avr);
+
+/*
+ * These are for internal access to the stack (for interupts)
+ */
+uint16_t _avr_sp_get(avr_t * avr);
+void _avr_sp_set(avr_t * avr, uint16_t sp);
+void _avr_push16(avr_t * avr, uint16_t v);
+
+/*
+ * Get a "pretty" register name
+ */
+const char * avr_regname(uint8_t reg);
+
+
+/*
+ * DEBUG bits follow
+ * These will diseapear when gdb arrives
+ */
+void avr_dump_state(avr_t * avr);
+
+#define DUMP_REG() { \
+ for (int i = 0; i < 32; i++) printf("%s=%02x%c", avr_regname(i), avr->data[i],i==15?'\n':' ');\
+ printf("\n");\
+ uint16_t y = avr->data[R_YL] | (avr->data[R_YH]<<8);\
+ for (int i = 0; i < 20; i++) printf("Y+%02d=%02x ", i, avr->data[y+i]);\
+ printf("\n");\
+ }
+
+
+#define CRASH() {\
+ DUMP_REG();\
+ printf("*** CYCLE %lld\n", avr->cycle);\
+ for (int i = OLD_PC_SIZE-1; i > 0; i--) {\
+ int pci = (avr->old_pci + i) & 0xf;\
+ printf("\e[31m*** %04x: %-25s RESET -%d; sp %04x\e[0m\n",\
+ avr->old[pci].pc, avr->codeline[avr->old[pci].pc>>1]->symbol, OLD_PC_SIZE-i, avr->old[pci].sp);\
+ }\
+ printf("Stack Ptr %04x/%04x = %d \n", _avr_sp_get(avr), avr->ramend, avr->ramend - _avr_sp_get(avr));\
+ exit(1);\
+ }
+
+#endif /* SIM_CORE_H_ */
--- /dev/null
+/*
+ sim_elf.c
+
+ Loads a .elf file, extract the code, the data, the eeprom and
+ the "mcu" specification section, also load usable code symbols
+ to be able to print meaningful trace information.
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <libelf.h>
+#include <gelf.h>
+
+#include "sim_elf.h"
+
+int elf_read_firmware(const char * file, elf_firmware_t * firmware)
+{
+ Elf32_Ehdr elf_header; /* ELF header */
+ Elf *elf = NULL; /* Our Elf pointer for libelf */
+ int fd; // File Descriptor
+
+ if ((fd = open(file, O_RDONLY)) == -1 ||
+ (read(fd, &elf_header, sizeof(elf_header))) < sizeof(elf_header)) {
+ printf("could not read %s\n", file);
+ perror(file);
+ close(fd);
+ return -1;
+ }
+
+ Elf_Data *data_data = NULL,
+ *data_text = NULL,
+ *data_ee = NULL; /* Data Descriptor */
+
+ memset(firmware, 0, sizeof(*firmware));
+#if ELF_SYMBOLS
+ //int bitesize = ((avr->flashend+1) >> 1) * sizeof(avr_symbol_t);
+ firmware->codesize = 32768;
+ int bitesize = firmware->codesize * sizeof(avr_symbol_t);
+ firmware->codeline = malloc(bitesize);
+ memset(firmware->codeline,0, bitesize);
+#endif
+
+ /* this is actualy mandatory !! otherwise elf_begin() fails */
+ if (elf_version(EV_CURRENT) == EV_NONE) {
+ /* library out of date - recover from error */
+ }
+ // Iterate through section headers again this time well stop when we find symbols
+ elf = elf_begin(fd, ELF_C_READ, NULL);
+ //printf("Loading elf %s : %p\n", file, elf);
+
+ Elf_Scn *scn = NULL; /* Section Descriptor */
+
+ while ((scn = elf_nextscn(elf, scn)) != NULL) {
+ GElf_Shdr shdr; /* Section Header */
+ gelf_getshdr(scn, &shdr);
+ char * name = elf_strptr(elf, elf_header.e_shstrndx, shdr.sh_name);
+ // printf("Walking elf section '%s'\n", name);
+
+ if (!strcmp(name, ".text"))
+ data_text = elf_getdata(scn, NULL);
+ else if (!strcmp(name, ".data"))
+ data_data = elf_getdata(scn, NULL);
+ else if (!strcmp(name, ".eeprom"))
+ data_ee = elf_getdata(scn, NULL);
+ else if (!strcmp(name, ".bss")) {
+ Elf_Data *s = elf_getdata(scn, NULL);
+ firmware->bsssize = s->d_size;
+ } else if (!strcmp(name, ".mmcu")) {
+ Elf_Data *s = elf_getdata(scn, NULL);
+ long f_cpu = s ? *((long*)s->d_buf) : 0;
+ firmware->mmcu = *((avr_mcu_t*)s->d_buf);
+ printf("%s: setting speed to %ld\n", __FUNCTION__, f_cpu);
+ // avr->frequency = f_cpu;
+ }
+#if ELF_SYMBOLS
+ // When we find a section header marked SHT_SYMTAB stop and get symbols
+ if (shdr.sh_type == SHT_SYMTAB) {
+ // edata points to our symbol table
+ Elf_Data *edata = elf_getdata(scn, NULL);
+
+ // how many symbols are there? this number comes from the size of
+ // the section divided by the entry size
+ int symbol_count = shdr.sh_size / shdr.sh_entsize;
+
+ // loop through to grab all symbols
+ for (int i = 0; i < symbol_count; i++) {
+ GElf_Sym sym; /* Symbol */
+ // libelf grabs the symbol data using gelf_getsym()
+ gelf_getsym(edata, i, &sym);
+
+ // print out the value and size
+ // printf("%08x %08d ", sym.st_value, sym.st_size);
+ if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL ||
+ ELF32_ST_TYPE(sym.st_info) == STT_FUNC ||
+ ELF32_ST_TYPE(sym.st_info) == STT_OBJECT) {
+ const char * name = elf_strptr(elf, shdr.sh_link, sym.st_name);
+
+ // type of symbol
+ if (sym.st_value & 0xfff00000) {
+
+ } else {
+ // code
+ if (firmware->codeline[sym.st_value >> 1] == NULL) {
+ avr_symbol_t * s = firmware->codeline[sym.st_value >> 1] = malloc(sizeof(avr_symbol_t*));
+ s->symbol = strdup(name);
+ s->addr = sym.st_value;
+ }
+ }
+ }
+ }
+ }
+#endif
+ }
+#if ELF_SYMBOLS
+ avr_symbol_t * last = NULL;
+ for (int i = 0; i < firmware->codesize; i++) {
+ if (!firmware->codeline[i])
+ firmware->codeline[i] = last;
+ else
+ last = firmware->codeline[i];
+ }
+#endif
+ uint32_t offset = 0;
+ firmware->flashsize =
+ (data_text ? data_text->d_size : 0) +
+ (data_data ? data_data->d_size : 0);
+ firmware->flash = malloc(firmware->flashsize);
+ if (data_text) {
+ // hdump("code", data_text->d_buf, data_text->d_size);
+ memcpy(firmware->flash + offset, data_text->d_buf, data_text->d_size);
+ offset += data_text->d_size;
+ printf("Loaded %d .text\n", data_text->d_size);
+ }
+ if (data_data) {
+ // hdump("data", data_data->d_buf, data_data->d_size);
+ memcpy(firmware->flash + offset, data_data->d_buf, data_data->d_size);
+ printf("Loaded %d .data\n", data_data->d_size);
+ offset += data_data->d_size;
+ firmware->datasize = data_data->d_size;
+ }
+ if (data_ee) {
+ // hdump("eeprom", data_ee->d_buf, data_ee->d_size);
+ firmware->eeprom = malloc(data_ee->d_size);
+ memcpy(firmware->eeprom, data_ee->d_buf, data_ee->d_size);
+ printf("Loaded %d .eeprom\n", data_ee->d_size);
+ firmware->eesize = data_ee->d_size;
+ }
+// hdump("flash", avr->flash, offset);
+ elf_end(elf);
+ close(fd);
+ return 0;
+}
+
--- /dev/null
+/*
+ sim_elf.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ELF_H_
+#define ELF_H_
+
+#include "avr_mcu_section.h"
+
+#ifndef ELF_SYMBOLS
+#define ELF_SYMBOLS 1
+#endif
+
+#if ELF_SYMBOLS
+#include "simavr.h"
+#endif
+
+typedef struct elf_firmware_t {
+ avr_mcu_t mmcu;
+ uint8_t * flash;
+ uint32_t flashsize;
+ uint32_t datasize;
+ uint32_t bsssize;
+ // read the .eeprom section of the elf, too
+ uint8_t * eeprom;
+ uint32_t eesize;
+
+#if ELF_SYMBOLS
+ avr_symbol_t ** codeline;
+ uint32_t codesize; // in elements
+#endif
+} elf_firmware_t ;
+
+int elf_read_firmware(const char * file, elf_firmware_t * firmware);
+
+#endif /* ELF_H_ */
--- /dev/null
+/*
+ sim_gdb.c
+
+ Placeholder!
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <poll.h>
+#include "simavr.h"
+
+typedef struct avr_gdb_t {
+ avr_t * avr;
+ int sock;
+} avr_gdb_t;
+
+int avr_gdb_init(avr_t * avr)
+{
+ avr_gdb_t * g = malloc(sizeof(avr_gdb_t));
+ memset(g, 0, sizeof(avr_gdb_t));
+
+ avr->gdb = NULL;
+
+ if ((g->sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
+ fprintf(stderr, "Can't create socket: %s", strerror(errno));
+ return -1;
+ }
+
+ int i = 1;
+ setsockopt(g->sock, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
+
+ struct sockaddr_in address = { 0 };
+ address.sin_family = AF_INET;
+ address.sin_port = htons (1234);
+
+ if (bind(g->sock, (struct sockaddr *) &address, sizeof(address))) {
+ fprintf(stderr, "Can not bind socket: %s", strerror(errno));
+ return -1;
+ }
+ avr->gdb = g;
+ return 0;
+}
--- /dev/null
+/*
+ sim_gdb.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __SIM_GDB_H__
+#define __SIM_GDB_H__
+
+#endif
--- /dev/null
+/*
+ simavr.c
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include "simavr.h"
+#include "sim_elf.h"
+
+#include "sim_core.h"
+#include "avr_eeprom.h"
+
+void hdump(const char *w, uint8_t *b, size_t l)
+{
+ uint32_t i;
+ if (l < 16) {
+ printf("%s: ",w);
+ for (i = 0; i < l; i++) printf("%02x",b[i]);
+ } else {
+ printf("%s:\n",w);
+ for (i = 0; i < l; i++) {
+ if (!(i & 0x1f)) printf(" ");
+ printf("%02x",b[i]);
+ if ((i & 0x1f) == 0x1f) {
+ printf(" ");
+ printf("\n");
+ }
+ }
+ }
+ printf("\n");
+}
+
+
+
+int avr_init(avr_t * avr)
+{
+ avr->flash = malloc(avr->flashend + 1);
+ memset(avr->flash, 0xff, avr->flashend + 1);
+ avr->data = malloc(avr->ramend + 1);
+ memset(avr->data, 0, avr->ramend + 1);
+
+ avr->state = cpu_Running;
+ avr->frequency = 1000000; // can be overriden via avr_mcu_section
+
+ if (avr->init)
+ avr->init(avr);
+ avr_reset(avr);
+ return 0;
+}
+
+void avr_reset(avr_t * avr)
+{
+ memset(avr->data, 0x0, avr->ramend + 1);
+ _avr_sp_set(avr, avr->ramend);
+ avr->pc = 0;
+ for (int i = 0; i < 8; i++)
+ avr->sreg[i] = 0;
+ if (avr->reset)
+ avr->reset(avr);
+
+ avr_io_t * port = avr->io_port;
+ while (port) {
+ if (port->reset)
+ port->reset(avr, port);
+ port = port->next;
+ }
+
+}
+
+int avr_ioctl(avr_t *avr, uint32_t ctl, void * io_param)
+{
+ avr_io_t * port = avr->io_port;
+ int res = -1;
+ while (port && res == -1) {
+ if (port->ioctl)
+ res = port->ioctl(avr, port, ctl, io_param);
+ port = port->next;
+ }
+ return res;
+}
+
+void avr_register_io(avr_t *avr, avr_io_t * io)
+{
+ io->next = avr->io_port;
+ avr->io_port = io;
+}
+
+void avr_register_io_read(avr_t *avr, uint8_t addr, avr_io_read_t readp, void * param)
+{
+ avr->ior[AVR_DATA_TO_IO(addr)].param = param;
+ avr->ior[AVR_DATA_TO_IO(addr)].r = readp;
+}
+
+void avr_register_io_write(avr_t *avr, uint8_t addr, avr_io_write_t writep, void * param)
+{
+ avr->iow[AVR_DATA_TO_IO(addr)].param = param;
+ avr->iow[AVR_DATA_TO_IO(addr)].w = writep;
+}
+
+void avr_register_vector(avr_t *avr, avr_int_vector_t * vector)
+{
+ if (vector->vector)
+ avr->vector[vector->vector] = vector;
+}
+
+int avr_has_pending_interupts(avr_t * avr)
+{
+ return avr->pending[0] || avr->pending[1];
+}
+
+int avr_is_interupt_pending(avr_t * avr, avr_int_vector_t * vector)
+{
+ return avr->pending[vector->vector >> 5] & (1 << (vector->vector & 0x1f));
+}
+
+void avr_raise_interupt(avr_t * avr, avr_int_vector_t * vector)
+{
+ if (!vector->vector)
+ return;
+// printf("%s raising %d\n", __FUNCTION__, vector->vector);
+ if (vector->enable.reg) {
+ if (!avr_regbit_get(avr, vector->enable))
+ return;
+ }
+ if (!avr_is_interupt_pending(avr, vector)) {
+ if (!avr->pending_wait)
+ avr->pending_wait = 2; // latency on interupts ??
+ avr->pending[vector->vector >> 5] |= (1 << (vector->vector & 0x1f));
+
+ if (vector->raised.reg)
+ avr_regbit_set(avr, vector->raised);
+ if (avr->state != cpu_Running) {
+ // printf("Waking CPU due to interrupt\n");
+ avr->state = cpu_Running; // in case we were sleeping
+ }
+ }
+}
+
+static void avr_clear_interupt(avr_t * avr, int v)
+{
+ avr_int_vector_t * vector = avr->vector[v];
+ avr->pending[v >> 5] &= ~(1 << (v & 0x1f));
+ if (!vector)
+ return;
+ printf("%s cleared %d\n", __FUNCTION__, vector->vector);
+ if (vector->raised.reg)
+ avr_regbit_clear(avr, vector->raised);
+}
+
+void avr_loadcode(avr_t * avr, uint8_t * code, uint32_t size, uint32_t address)
+{
+ memcpy(avr->flash + address, code, size);
+}
+
+void avr_core_watch_write(avr_t *avr, uint16_t addr, uint8_t v)
+{
+ if (addr > avr->ramend) {
+ printf("*** Invalid write address PC=%04x SP=%04x O=%04x Address %04x=%02x out of ram\n",
+ avr->pc, _avr_sp_get(avr), avr->flash[avr->pc] | (avr->flash[avr->pc]<<8), addr, v);
+ CRASH();
+ }
+ if (addr < 32) {
+ printf("*** Invalid write address PC=%04x SP=%04x O=%04x Address %04x=%02x low registers\n",
+ avr->pc, _avr_sp_get(avr), avr->flash[avr->pc] | (avr->flash[avr->pc]<<8), addr, v);
+ CRASH();
+ }
+#if 0
+ /*
+ * this only happend when the compiler is doctoring the stack before calls. Or
+ * if there is an invalid pointer somewhere...
+ */
+ if (addr > _avr_sp_get(avr)) {
+ avr->trace++;
+ STATE("\e[31mmunching stack SP %04x, A=%04x <= %02x\e[0m\n", _avr_sp_get(avr), addr, v);
+ avr->trace--;
+ }
+#endif
+ avr->data[addr] = v;
+}
+
+uint8_t avr_core_watch_read(avr_t *avr, uint16_t addr)
+{
+ if (addr > avr->ramend) {
+ printf("*** Invalid read address PC=%04x SP=%04x O=%04x Address %04x out of ram (%04x)\n",
+ avr->pc, _avr_sp_get(avr), avr->flash[avr->pc] | (avr->flash[avr->pc]<<8), addr, avr->ramend);
+ CRASH();
+ }
+ return avr->data[addr];
+}
+
+/*
+ * check wether interupts are pending. I so, check if the interupt "latency" is reached,
+ * and if so triggers the handlers and jump to the vector.
+ */
+static void avr_service_interupts(avr_t * avr)
+{
+ if (!avr->sreg[S_I])
+ return;
+
+ if (avr_has_pending_interupts(avr)) {
+ if (avr->pending_wait) {
+ avr->pending_wait--;
+ if (avr->pending_wait == 0) {
+ int done = 0;
+ for (int bi = 0; bi < 2 && !done; bi++) if (avr->pending[bi]) {
+ for (int ii = 0; ii < 32 && !done; ii++)
+ if (avr->pending[bi] & (1 << ii)) {
+
+ int v = (bi * 32) + ii; // vector
+
+ // printf("%s calling %d\n", __FUNCTION__, v);
+ _avr_push16(avr, avr->pc >> 1);
+ avr->sreg[S_I] = 0;
+ avr->pc = v * avr->vector_size;
+
+ avr_clear_interupt(avr, v);
+ done++;
+ break;
+ }
+ break;
+ }
+ }
+ } else
+ avr->pending_wait = 2; // for next one...
+ }
+}
+
+
+int avr_run(avr_t * avr)
+{
+ if (avr->state == cpu_Stopped)
+ return avr->state;
+
+ uint16_t new_pc = avr->pc;
+
+ if (avr->state == cpu_Running) {
+ new_pc = avr_run_one(avr);
+ avr_dump_state(avr);
+ } else
+ avr->cycle ++;
+
+ // re-synth the SREG
+ //SREG();
+ // if we just re-enabled the interrupts...
+ if (avr->sreg[S_I] && !(avr->data[R_SREG] & (1 << S_I))) {
+ // printf("*** %s: Renabling interupts\n", __FUNCTION__);
+ avr->pending_wait++;
+ }
+ avr_io_t * port = avr->io_port;
+ while (port) {
+ if (port->run)
+ port->run(avr, port);
+ port = port->next;
+ }
+
+ avr->pc = new_pc;
+
+ if (avr->state == cpu_Sleeping) {
+ if (!avr->sreg[S_I]) {
+ printf("simavr: sleeping with interupts off, quitting gracefuly\n");
+ exit(0);
+ }
+ usleep(500);
+ long sleep = (float)avr->frequency * (1.0f / 500.0f);
+ avr->cycle += sleep;
+ // avr->state = cpu_Running;
+ }
+ // Interrupt servicing might change the PC too
+ if (avr->state == cpu_Running || avr->state == cpu_Sleeping) {
+ avr_service_interupts(avr);
+
+ avr->data[R_SREG] = 0;
+ for (int i = 0; i < 8; i++)
+ if (avr->sreg[i] > 1) {
+ printf("** Invalid SREG!!\n");
+ CRASH();
+ } else if (avr->sreg[i])
+ avr->data[R_SREG] |= (1 << i);
+ }
+ return avr->state;
+}
+
+extern avr_kind_t tiny85;
+extern avr_kind_t mega48,mega88,mega168;
+extern avr_kind_t mega644;
+
+avr_kind_t * avr_kind[] = {
+ &tiny85,
+ &mega48,
+ &mega88,
+ &mega168,
+ &mega644,
+ NULL
+};
+
+int main(int argc, const char **argv)
+{
+ elf_firmware_t f;
+
+ elf_read_firmware(argv[1], &f);
+
+ printf("firmware %s f=%ld mmcu=%s\n", argv[1], f.mmcu.f_cpu, f.mmcu.name);
+
+ avr_kind_t * maker = NULL;
+ for (int i = 0; avr_kind[i] && !maker; i++) {
+ for (int j = 0; avr_kind[i]->names[j]; j++)
+ if (!strcmp(avr_kind[i]->names[j], f.mmcu.name)) {
+ maker = avr_kind[i];
+ break;
+ }
+ }
+ if (!maker) {
+ fprintf(stderr, "%s: AVR '%s' now known\n", argv[0], f.mmcu.name);
+ exit(1);
+ }
+
+ avr_t * avr = maker->make();
+ printf("Starting %s - flashend %04x ramend %04x e2end %04x\n", avr->mmcu, avr->flashend, avr->ramend, avr->e2end);
+ avr_init(avr);
+ avr->frequency = f.mmcu.f_cpu;
+ avr->codeline = f.codeline;
+ avr_loadcode(avr, f.flash, f.flashsize, 0);
+ avr->codeend = f.flashsize - f.datasize;
+ if (f.eeprom && f.eesize) {
+ avr_eeprom_desc_t d = { .ee = f.eeprom, .offset = 0, .size = f.eesize };
+ avr_ioctl(avr, AVR_IOCTL_EEPROM_SET, &d);
+ }
+// avr->trace = 1;
+
+ for (long long i = 0; i < 8000000*10; i++)
+// for (long long i = 0; i < 80000; i++)
+ avr_run(avr);
+
+}
--- /dev/null
+/*
+ simavr.h
+
+ Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+
+ This file is part of simavr.
+
+ simavr is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ simavr is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with simavr. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __SIMAVR_H__
+#define __SIMAVR_H__
+
+#include <stdint.h>
+
+struct avr_t;
+typedef uint8_t (*avr_io_read_t)(struct avr_t * avr, uint8_t addr, void * param);
+typedef void (*avr_io_write_t)(struct avr_t * avr, uint8_t addr, uint8_t v, void * param);
+
+enum {
+ // SREG bit indexes
+ S_C = 0,S_Z,S_N,S_V,S_S,S_H,S_T,S_I,
+
+ // 16 bits register pairs
+ R_XL = 0x1a, R_XH,R_YL,R_YH,R_ZL,R_ZH,
+ // stack pointer
+ R_SPL = 32+0x3d, R_SPH,
+ // real SREG
+ R_SREG = 32+0x3f,
+
+ // maximum number of IO regisrer, on normal AVRs
+ MAX_IOs = 256 - 32, // minus 32 GP registers
+};
+
+#define AVR_DATA_TO_IO(v) ((v) - 32)
+#define AVR_IO_TO_DATA(v) ((v) + 32)
+
+/*
+ * Core states. This will need populating with debug states for gdb
+ */
+enum {
+ cpu_Stopped,
+ cpu_Running,
+ cpu_Sleeping,
+};
+
+/*
+ * Main AVR instance. Some of these fields are set by the AVR "Core" definition files
+ * the rest is runtime data (as little as possible)
+ */
+typedef struct avr_t {
+ const char * mmcu; // name of the AVR
+ // these are filled by sim_core_declare from constants in /usr/lib/avr/include/avr/io*.h
+ uint16_t ramend;
+ uint32_t flashend;
+ uint32_t e2end;
+ uint8_t vector_size;
+ uint8_t signature[3];
+ uint8_t fuse[4];
+
+ // filled by the ELF data, this allow tracking of invalid jumps
+ uint32_t codeend;
+
+ int state; // stopped, running, sleeping
+ uint32_t frequency; // frequency we are running at
+ uint64_t cycle; // current cycle
+
+ // called at init time
+ void (*init)(struct avr_t * avr);
+ // called at reset time
+ void (*reset)(struct avr_t * avr);
+
+ // Mirror of the SREG register, to facilitate the access to bits
+ // in the opcode decoder.
+ // This array is re-synthetized back/forth when SREG changes
+ uint8_t sreg[8];
+
+ /*
+ * ** current PC **
+ * Note that the PC is reoresenting /bytes/ while the AVR value is
+ * assumed to be "words". This is in line with what GDB does...
+ * this is why you will see >>1 ane <<1 in the decoder to handle jumps
+ */
+ uint32_t pc;
+
+ /*
+ * callback when specific IO registers are read/written
+ */
+ struct {
+ void * param;
+ avr_io_read_t r;
+ } ior[MAX_IOs];
+ struct {
+ void * param;
+ avr_io_write_t w;
+ } iow[MAX_IOs];
+
+ // flash memory (initialized to 0xff, and code loaded into it)
+ uint8_t * flash;
+ // this is the general purpose registers, IO registers, and SRAM
+ uint8_t * data;
+
+ // queue of io modules
+ struct avr_io_t *io_port;
+
+ // interupt vectors, and their enable/clear registers
+ struct avr_int_vector_t * vector[64];
+ uint8_t pending_wait; // number of cycles to wait for pending
+ uint32_t pending[2]; // pending interupts
+
+ // DEBUG ONLY
+ int trace;
+ struct avr_symbol_t ** codeline;
+
+ /* DEBUG ONLY
+ * this keeps track of "jumps" ie, call,jmp,ret,reti and so on
+ * allows dumping of a meaningful data even if the stack is
+ * munched and so on
+ */
+ #define OLD_PC_SIZE 32
+ struct {
+ uint32_t pc;
+ uint16_t sp;
+ } old[OLD_PC_SIZE]; // catches reset..
+ int old_pci;
+
+ // DEBUG ONLY
+ // keeps track of wich registers gets touched by instructions
+ // reset before each new instructions. Allows meaningful traces
+ uint32_t touched[256 / 32]; // debug
+
+ // placeholder
+ struct avr_gdb_t * gdb;
+} avr_t;
+
+
+// this is a static constructor for each of the AVR devices
+typedef struct avr_kind_t {
+ const char * names[4]; // name aliases
+ avr_t * (*make)();
+} avr_kind_t;
+
+// a symbol loaded from the .elf file
+typedef struct avr_symbol_t {
+ const char * symbol;
+ uint32_t addr;
+} avr_symbol_t;
+
+/*
+ * this 'structure' is a packed representation of an IO register 'bit'
+ * (or consecutive bits). This allows a way to set/get/clear them.
+ * gcc is happy passing these as register value, so you don't need to
+ * use a pointer when passing them along to functions.
+ */
+typedef struct avr_regbit_t {
+ unsigned long reg : 8, bit : 3, mask : 8;
+} avr_regbit_t;
+
+// interupt vector for the IO modules
+typedef struct avr_int_vector_t {
+ uint8_t vector; // vector number, zero (reset) is reserved
+
+ avr_regbit_t enable; // IO register index for the "interupt enable" flag for this vector
+ avr_regbit_t raised; // IO register index for the register where the "raised" flag is (optional)
+} avr_int_vector_t;
+
+/*
+ * used by the ioports to implement their own features
+ * see avr_eeprom.* for an example, and avr_ioctl().
+ */
+#define AVR_IOCTL_DEF(_a,_b,_c,_d) \
+ (((_a) << 24)|((_b) << 16)|((_c) << 8)|((_d)))
+
+/*
+ * IO module base struct
+ * Modules uses that as their first member in their own struct
+ */
+typedef struct avr_io_t {
+ struct avr_io_t * next;
+ const char * kind;
+ // called at every instruction
+ void (*run)(avr_t * avr, struct avr_io_t *io);
+ // called at reset time
+ void (*reset)(avr_t * avr, struct avr_io_t *io);
+ // called externally. allow access to io modules and so on
+ int (*ioctl)(avr_t * avr, struct avr_io_t *io, uint32_t ctl, void *io_param);
+} avr_io_t;
+
+// initializes a new AVR instance. Will call the IO registers init(), and then reset()
+int avr_init(avr_t * avr);
+// resets the AVR, and the IO modules
+void avr_reset(avr_t * avr);
+
+// load code in the "flash"
+void avr_loadcode(avr_t * avr, uint8_t * code, uint32_t size, uint32_t address);
+
+/*
+ * IO modules helper functions
+ */
+
+// registers an IO module, so it's run(), reset() etc are called
+// this is called by the AVR core init functions, you /could/ register an external
+// one after instanciation, for whatever purpose...
+void avr_register_io(avr_t *avr, avr_io_t * io);
+// register a callback for when IO register "addr" is read
+void avr_register_io_read(avr_t *avr, uint8_t addr, avr_io_read_t read, void * param);
+// register a callback for when the IO register is written. callback has to set the memory itself
+void avr_register_io_write(avr_t *avr, uint8_t addr, avr_io_write_t write, void * param);
+// call every IO modules until one responds to this
+int avr_ioctl(avr_t *avr, uint32_t ctl, void * io_param);
+
+/*
+ * Interupt Helper Functions
+ */
+// register an interupt vector. It's only needed if you want to use the "r_raised" flags
+void avr_register_vector(avr_t *avr, avr_int_vector_t * vector);
+// raise an interupt (if enabled). The interupt is latched and will be called later
+void avr_raise_interupt(avr_t * avr, avr_int_vector_t * vector);
+// return non-zero if the AVR core has any pending interupts
+int avr_has_pending_interupts(avr_t * avr);
+// return nonzero if a soecific interupt vector is pending
+int avr_is_interupt_pending(avr_t * avr, avr_int_vector_t * vector);
+
+/*
+ * these are accessors for avr->data but allows watchpoints to be set for gdb
+ * IO modules use that to set values to registers, and the AVR core decoder uses
+ * that to register "public" read by instructions.
+ */
+void avr_core_watch_write(avr_t *avr, uint16_t addr, uint8_t v);
+uint8_t avr_core_watch_read(avr_t *avr, uint16_t addr);
+
+
+/*
+ * These accessors are inlined and are used to perform the operations on
+ * avr_regbit_t definitions. This is the "official" way to access bits into registers
+ * The small footorint costs brings much better versatility for functions/bits that are
+ * not always defined in the same place on real AVR cores
+ */
+/*
+ * set/get/clear io register bits in one operation
+ */
+static inline uint8_t avr_regbit_set(avr_t * avr, avr_regbit_t rb)
+{
+ uint8_t a = rb.reg;
+ if (!a)
+ return 0;
+ uint8_t m = rb.mask << rb.bit;
+ avr_core_watch_write(avr, a, avr->data[a] | m);
+ return (avr->data[a] >> rb.bit) & rb.mask;
+}
+
+static inline uint8_t avr_regbit_setto(avr_t * avr, avr_regbit_t rb, uint8_t v)
+{
+ uint8_t a = rb.reg;
+ if (!a)
+ return 0;
+ uint8_t m = rb.mask << rb.bit;
+ avr_core_watch_write(avr, a, (avr->data[a] & ~(m)) | ((v << rb.bit) & m));
+ return (avr->data[a] >> rb.bit) & rb.mask;
+}
+
+static inline uint8_t avr_regbit_get(avr_t * avr, avr_regbit_t rb)
+{
+ uint8_t a = rb.reg;
+ if (!a)
+ return 0;
+ //uint8_t m = rb.mask << rb.bit;
+ return (avr->data[a] >> rb.bit) & rb.mask;
+}
+
+static inline uint8_t avr_regbit_clear(avr_t * avr, avr_regbit_t rb)
+{
+ uint8_t a = (rb.reg);
+ uint8_t m = rb.mask << rb.bit;
+ avr_core_watch_write(avr, a, avr->data[a] & ~m);
+ return avr->data[a];
+}
+
+#define ARRAY_SIZE(_aa) (sizeof(_aa) / sizeof((_aa)[0]))
+
+/*
+ * This reads the bits for an array of avr_regbit_t, make up a "byte" with them.
+ * This allows reading bits like CS0, CS1, CS2 etc even if they are not in the same
+ * physical IO register.
+ */
+static inline uint8_t avr_regbit_get_array(avr_t * avr, avr_regbit_t *rb, int count)
+{
+ uint8_t res = 0;
+
+ for (int i = 0; i < count; i++, rb++) if (rb->reg) {
+ uint8_t a = (rb->reg);
+ res |= ((avr->data[a] >> rb->bit) & rb->mask) << i;
+ }
+ return res;
+}
+
+#define AVR_IO_REGBIT(_io, _bit) { . reg = (_io), .bit = (_bit), .mask = 1 }
+#define AVR_IO_REGBITS(_io, _bit, _mask) { . reg = (_io), .bit = (_bit), .mask = (_mask) }
+
+
+#endif /*__SIMAVR_H__*/
+
--- /dev/null
+#
+# This makefile take each "at*" file, extracts it's part name
+# And compile it into an ELF binary.
+# It also disassemble it for debugging purposes.
+#
+# The code is compiled "optimized" to the max.
+#
+# The wierd "-Wl,--undefined=_mmcu,--section-start=.mmcu=0x910000"
+# is used to tell the linker not to discard the .mmcu section,
+# otherwise the --gc-sections will delete it.
+#
+# Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
+#
+# This file is part of simavr.
+#
+# simavr is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# simavr is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with simavr. If not, see <http://www.gnu.org/licenses/>.
+
+sources := $(wildcard at*.c)
+
+all : ${sources:.c=.axf} ${sources:.c=.hex} ${sources:.c=.s}
+
+%.hex: %.axf
+ @avr-objcopy -j .text -j .data -O ihex ${<} ${@}
+
+%.s: %.axf
+ @avr-objdump -j .text -j .data -j .bss -d ${<} > ${@}
+
+%.axf: %.c
+ @echo CC ${<}
+ @part=${<} ; part=$${part/_*}; \
+ avr-gcc -Wall -g -Os -std=gnu99 \
+ -mmcu=$$part \
+ -DF_CPU=8000000 \
+ -mcall-prologues -fno-inline-small-functions \
+ -ffunction-sections -fdata-sections \
+ -Wl,--relax,--gc-sections \
+ -Wl,--undefined=_mmcu,--section-start=.mmcu=0x910000 \
+ -I../include \
+ ${<} -o ${@}
+ @avr-size ${@}|sed '1d'
+
+clean:
+ rm -f *.hex *.o *.axf *.s
--- /dev/null
+/*
+ atmega88_example.c
+
+ */
+
+#ifndef F_CPU
+#define F_CPU 8000000
+#endif
+#include <avr/io.h>
+#include <stdio.h>
+#include <avr/interrupt.h>
+#include <avr/eeprom.h>
+#include <avr/sleep.h>
+
+/*
+ * This demonstrate how to use the avr_mcu_section.h file
+ * The macro adds a section to the ELF file with useful
+ * information for the simulator
+ */
+#include "avr_mcu_section.h"
+AVR_MCU(F_CPU, "atmega88");
+
+/* declare this in a .eeprom ELF section */
+uint32_t value EEMEM = 0xdeadbeef;
+
+static int uart_putchar(char c, FILE *stream) {
+ if (c == '\n')
+ uart_putchar('\r', stream);
+ loop_until_bit_is_set(UCSR0A, UDRE0);
+ UDR0 = c;
+ return 0;
+}
+
+static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL,
+ _FDEV_SETUP_WRITE);
+
+
+int main()
+{
+ stdout = &mystdout;
+
+ // read the eeprom value
+ uint32_t c = eeprom_read_dword((void*)&value);
+ printf("Read from eeprom 0x%08lx -- should be 0xdeadbeef\n", c);
+ // change the eeprom
+ eeprom_write_dword((void*)&value, 0xcafef00d);
+ // re-read it
+ c = eeprom_read_dword((void*)&value);
+ printf("Read from eeprom 0x%08lx -- should be 0xcafef00d\n", c);
+
+ // this quits the simulator, since interupts are off
+ // this is a "feature" that allows running tests cases and exit
+ sleep_cpu();
+}
projects / simavr / commitdiff