core+elf: Add fields for the MCU voltages

[simavr] / include / avr_mcu_section.h

diff --git a/include/avr_mcu_section.h b/include/avr_mcu_section.h
index eb36512..bce65e8 100644 (file)
--- a/include/avr_mcu_section.h
+++ b/include/avr_mcu_section.h
@@ -44,15 +44,26 @@ enum {
        AVR_MMCU_TAG = 0,
        AVR_MMCU_TAG_NAME,
        AVR_MMCU_TAG_FREQUENCY,
+       AVR_MMCU_TAG_VCC,
+       AVR_MMCU_TAG_AVCC,
+       AVR_MMCU_TAG_AREF,
        AVR_MMCU_TAG_LFUSE,
        AVR_MMCU_TAG_HFUSE,
        AVR_MMCU_TAG_EFUSE,
        AVR_MMCU_TAG_SIGNATURE,
+       AVR_MMCU_TAG_SIMAVR_COMMAND,
        AVR_MMCU_TAG_VCD_FILENAME,
        AVR_MMCU_TAG_VCD_PERIOD,        
        AVR_MMCU_TAG_VCD_TRACE,
 };
 
+enum {
+       SIMAVR_CMD_NONE = 0,
+       SIMAVR_CMD_VCD_START_TRACE,
+       SIMAVR_CMD_VCD_STOP_TRACE,
+       SIMAVR_CMD_UART_LOOPBACK,
+};
+
 #if __AVR__
 
 #define _MMCU_ __attribute__((section(".mmcu")))
@@ -68,6 +79,12 @@ struct avr_mmcu_string_t {
        char string[]; 
 } __attribute__((__packed__));
 
+struct avr_mmcu_addr_t {
+       uint8_t tag;
+       uint8_t len;
+       void * what;
+} __attribute__((__packed__));
+
 struct avr_mmcu_vcd_trace_t {
        uint8_t tag;
        uint8_t len;
@@ -98,13 +115,25 @@ const uint8_t _##_tag _MMCU_ = { _tag, 1, _val }
        .len = sizeof(struct avr_mmcu_vcd_trace_t) - 2 + sizeof(_name),\
        .name = _name
 
-// specified the nane and wanted period (usec) for a VCD file
+// specified the name and wanted period (usec) for a VCD file
 // thid is not mandatory, a default one will be created if
 // symbols are declared themselves
 #define AVR_MCU_VCD_FILE(_name, _period) \
        AVR_MCU_STRING(AVR_MMCU_TAG_VCD_FILENAME, _name);\
        AVR_MCU_LONG(AVR_MMCU_TAG_VCD_PERIOD, _period)
 
+// It is possible to send "commands" to simavr from the
+// firmware itself. For this to work you need to specify
+// an IO register that is to be used for a write-only
+// bridge. A favourite is one of the usual "GPIO register"
+// that most (all ?) AVR have
+#define AVR_MCU_SIMAVR_COMMAND(_register) \
+       const struct avr_mmcu_addr_t _simavr_command_register _MMCU_ = {\
+               .tag = AVR_MMCU_TAG_SIMAVR_COMMAND,\
+               .len = sizeof(void *),\
+               .what = (void*)_register, \
+       }
+
 /*
  * This the has to be used if you want to add other tags to the .mmcu section
  * the _mmcu symbol is used as an anchor to make sure it stays linked in.
@@ -114,6 +143,11 @@ const uint8_t _##_tag _MMCU_ = { _tag, 1, _val }
        AVR_MCU_STRING(AVR_MMCU_TAG_NAME, _name);\
        AVR_MCU_LONG(AVR_MMCU_TAG_FREQUENCY, _speed)
 
+#define AVR_MCU_VOLTAGES(_vcc, _avcc, _aref) \
+       AVR_MCU_LONG(AVR_MMCU_TAG_VCC, (_vcc));\
+       AVR_MCU_LONG(AVR_MMCU_TAG_AVCC, (_avcc));\
+       AVR_MCU_LONG(AVR_MMCU_TAG_AREF, (_aref));
+
 #endif /* __AVR__ */