From a05528f44a36773d3bb3cf642dcb77bca79c5a33 Mon Sep 17 00:00:00 2001
From: travisutk <travisutk@12e2690d-a6be-4b82-a7b7-67c4a43b65c8>
Date: Mon, 1 Mar 2010 02:22:55 +0000
Subject: [PATCH] Chipcon entry in ASM.

git-svn-id: https://svn.code.sf.net/p/goodfet/code/trunk@378 12e2690d-a6be-4b82-a7b7-67c4a43b65c8
---
 firmware/Makefile                  |  2 +-
 firmware/apps/chipcon/chipcon.c    | 20 +++++++++++++++++++
 firmware/apps/chipcon/chipconasm.S | 32 ++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 firmware/apps/chipcon/chipconasm.S

diff --git a/firmware/Makefile b/firmware/Makefile
index 531f3d1..443d016 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -26,7 +26,7 @@ CC=msp430-gcc -Wall -Os -g -mmcu=$(mcu) -D$(mcu) -DGCC $(GCCINC) -I include $(CC
 moreapps?=apps/i2c/i2c.o apps/chipcon/chipcon.o apps/glitch/glitch.o apps/jtag/sbw.o apps/smartcard/smartcard.o
 
 apps= $(moreapps) apps/monitor/monitor.o apps/spi/spi.o   apps/jtag/jtag.o apps/jtag/jtag430.o apps/jtag/jtag430x2.o apps/avr/avr.o apps/jtag/ejtag.o
-libs= lib/$(mcu).o lib/command.o apps/jtag/jtag430asm.o
+libs= lib/$(mcu).o lib/command.o apps/jtag/jtag430asm.o apps/chipcon/chipconasm.o
 app= goodfet
 
 all: $(app).hex
diff --git a/firmware/apps/chipcon/chipcon.c b/firmware/apps/chipcon/chipcon.c
index 1f4b3d4..ce0a9ff 100644
--- a/firmware/apps/chipcon/chipcon.c
+++ b/firmware/apps/chipcon/chipcon.c
@@ -56,6 +56,22 @@ void ccsetup(){
   //P5REN=0xFF;
 }
 
+
+/* 33 cycle critical region
+0000000e <ccdebuginit>:
+   e:	f2 d0 0d 00 	bis.b	#13,	&0x0031	;5 cycles
+  12:	31 00 
+  14:	f2 c2 31 00 	bic.b	#8,	&0x0031	;4 cycles
+  18:	d2 c3 31 00 	bic.b	#1,	&0x0031	;4
+  1c:	f2 e2 31 00 	xor.b	#8,	&0x0031	;4
+  20:	f2 e2 31 00 	xor.b	#8,	&0x0031	;4
+  24:	f2 e2 31 00 	xor.b	#8,	&0x0031	;4
+  28:	f2 e2 31 00 	xor.b	#8,	&0x0031	;4
+  2c:	d2 d3 31 00 	bis.b	#1,	&0x0031	;4
+  30:	30 41       	ret			
+*/
+
+/*
 //! Initialize the debugger
 void ccdebuginit(){
   //Port output BUT NOT DIRECTION is set at start.
@@ -78,6 +94,10 @@ void ccdebuginit(){
   //Raise !RST.
   P5OUT|=RST;
 }
+*/
+
+//! Initialize the debugger.
+void ccdebuginit(); 
 
 //! Read and write a CC bit.
 unsigned char cctrans8(unsigned char byte){
diff --git a/firmware/apps/chipcon/chipconasm.S b/firmware/apps/chipcon/chipconasm.S
new file mode 100644
index 0000000..09e8683
--- /dev/null
+++ b/firmware/apps/chipcon/chipconasm.S
@@ -0,0 +1,32 @@
+.globl ccdebuginit
+.type ccdebuginit,@function //for linking
+
+#define _GNU_ASSEMBLER_
+#include "gfports.h"
+
+	
+//In assembly for cycle-counting, not for efficiency.
+//
+ccdebuginit:
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	nop			;1 cycle
+	
+	bis.b	#13,	&0x0031	;5 cycles
+	bic.b	#8,	&0x0031	;4 cycles
+	bic.b	#1,	&0x0031	;4
+	xor.b	#8,	&0x0031	;4
+	xor.b	#8,	&0x0031	;4
+	xor.b	#8,	&0x0031	;4
+;; 	xor.b	#8,	&0x0031	;4
+	bis.b	#1,	&0x0031	;4
+	ret			
-- 
2.20.1