X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Fapps%2Fjtag%2Fjtag430.c;h=d937b4d42bba208e2c79be59bd42c63b3dc84955;hp=081fb52427368ba49aa95e39d7d24850c8bb5dca;hb=ae09939eb8c62c83f244527e7916cee5f9145e6c;hpb=7487b2cd89324081ccfc195d49f4158f10ec534f

diff --git a/firmware/apps/jtag/jtag430.c b/firmware/apps/jtag/jtag430.c
index 081fb52..d937b4d 100644
--- a/firmware/apps/jtag/jtag430.c
+++ b/firmware/apps/jtag/jtag430.c
@@ -1,9 +1,15 @@
+/*! \file jtag430.c
+  \author Travis Goodspeed <travis at radiantmachines.com>
+  \brief MSP430 JTAG (16-bit)
+*/
 
 #include "platform.h"
 #include "command.h"
 #include "jtag.h"
 
 
+unsigned int jtag430mode=MSP430X2MODE;
+
 //! Set the program counter.
 void jtag430_setpc(unsigned int adr){
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
@@ -49,6 +55,7 @@ unsigned int jtag430_readmem(unsigned int adr){
   
   CLRTCLK;
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
+  
   if(adr>0xFF)
     jtag_dr_shift16(0x2409);//word read
   else
@@ -79,28 +86,6 @@ void jtag430_writemem(unsigned int adr, unsigned int data){
   SETTCLK;
 }
 
-//! Defined in jtag430asm.S
-void jtag430_tclk_flashpulses(int);
-/* //! Pulse TCLK at 350kHz +/- 100kHz */
-/* void jtag430_tclk_flashpulses(register i){ */
-/*   //TODO check this on a scope. */
-/*   register j=0; */
-  
-/*   //At 2MHz, 350kHz is obtained with 5 clocks of delay */
-  
-/*   /\** Pondering: */
-/*       What happens if the frequency is too low or to high? */
-/*       Is there any risk of damaging the chip, or only of a poor write? */
-/*   *\/ */
-/*   while(j++!=i){ */
-/*     SETTCLK; */
-/*     _NOP(); */
-/*     _NOP(); */
-/*     _NOP(); */
-/*     CLRTCLK; */
-/*   } */
-/* } */
-
 //! Write data to flash memory.  Must be preconfigured.
 void jtag430_writeflashword(unsigned int adr, unsigned int data){
   /*
@@ -151,6 +136,27 @@ void jtag430_writeflash(unsigned int adr, unsigned int data){
 
 
 
+//! Power-On Reset
+void jtag430_por(){
+  unsigned int jtagid;
+
+  // Perform Reset
+  jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
+  jtag_dr_shift16(0x2C01); // apply
+  jtag_dr_shift16(0x2401); // remove
+  CLRTCLK;
+  SETTCLK;
+  CLRTCLK;
+  SETTCLK;
+  CLRTCLK;
+  jtagid = jtag_ir_shift8(IR_ADDR_CAPTURE); // get JTAG identifier
+  SETTCLK;
+  
+  jtag430_writemem(0x0120, 0x5A80);   // Diabled Watchdog
+}
+
+
+
 #define ERASE_GLOB 0xA50E
 #define ERASE_ALLMAIN 0xA50C
 #define ERASE_MASS 0xA506
@@ -159,6 +165,8 @@ void jtag430_writeflash(unsigned int adr, unsigned int data){
 
 //! Configure flash, then write a word.
 void jtag430_eraseflash(unsigned int mode, unsigned int adr, unsigned int count){
+  jtag430_haltcpu();
+  
   //FCTL1= erase mode
   jtag430_writemem(0x0128, mode);
   //FCTL2=0xA540, selecting MCLK as source, DIV=1
@@ -178,6 +186,8 @@ void jtag430_eraseflash(unsigned int mode, unsigned int adr, unsigned int count)
   
   //FCTL1=0xA500, disabling flash write
   jtag430_writemem(0x0128, 0xA500);
+  
+  jtag430_releasecpu();
 }
 
 
@@ -185,8 +195,9 @@ void jtag430_eraseflash(unsigned int mode, unsigned int adr, unsigned int count)
 void jtag430_resettap(){
   int i;
   // Settle output
+  SETTDI; //430X2
   SETTMS;
-  SETTDI;
+  //SETTDI; //classic
   SETTCK;
 
   // Navigate to reset state.
@@ -205,7 +216,7 @@ void jtag430_resettap(){
 
     
   /* sacred, by spec.
-     Sometimes this isn't necessary. */
+     Sometimes this isn't necessary.  */
   // fuse check
   CLRTMS;
   delay(50);
@@ -237,6 +248,9 @@ void jtag430_start(){
   SETRST;
   P5DIR&=~RST;
   delay(0xFFFF);
+  
+  //Perform a reset and disable watchdog.
+  jtag430_por();
 }
 
 //! Set CPU to Instruction Fetch
@@ -252,17 +266,19 @@ void jtag430_setinstrfetch(){
   }
 }
 
-//! Handles unique MSP430 JTAG commands.  Forwards others to JTAG.
-void jtag430handle(unsigned char app,
+
+//! Handles classic MSP430 JTAG commands.  Forwards others to JTAG.
+void oldjtag430handle(unsigned char app,
 		   unsigned char verb,
 		   unsigned char len){
-  unsigned char i;
+  
   switch(verb){
   case START:
     //Enter JTAG mode.
     jtag430_start();
     //TAP setup, fuse check
     jtag430_resettap();
+    
     txdata(app,verb,0);
     break;
   case JTAG430_HALTCPU:
@@ -277,7 +293,6 @@ void jtag430handle(unsigned char app,
     jtag430_setinstrfetch();
     txdata(app,verb,0);
     break;
-
     
   case JTAG430_READMEM:
   case PEEK:
@@ -286,8 +301,8 @@ void jtag430handle(unsigned char app,
     break;
   case JTAG430_WRITEMEM:
   case POKE:
-    jtag430_writemem(cmddataword[0],cmddataword[1]);
-    cmddataword[0]=jtag430_readmem(cmddataword[0]);
+    jtag430_writemem(cmddatalong[0],cmddataword[2]);
+    cmddataword[0]=jtag430_readmem(cmddatalong[0]);
     txdata(app,verb,2);
     break;
   case JTAG430_WRITEFLASH:
@@ -311,3 +326,16 @@ void jtag430handle(unsigned char app,
   jtag430_resettap();
 }
 
+//! Handles unique MSP430 JTAG commands.  Forwards others to JTAG.
+void jtag430handle(unsigned char app,
+		   unsigned char verb,
+		   unsigned char len){
+  switch(jtag430mode){
+  case MSP430MODE:
+    return oldjtag430handle(app,verb,len);
+  case MSP430X2MODE:
+    return jtag430x2handle(app,verb,len);
+  default:
+    txdata(app,NOK,0);
+  }
+}