X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Fapps%2Fjtag%2Fjtag430.c;h=d518ca1c403e813b16e32c67e00f0a7ec7752062;hp=cc2ecc2b34b241dcd1f200a422507c66a0b606f9;hb=0fb25630e9970a4e6d18e190c484f654490565b0;hpb=3e900862cd87255c698e516c37078163ce343e77

diff --git a/firmware/apps/jtag/jtag430.c b/firmware/apps/jtag/jtag430.c
index cc2ecc2..d518ca1 100644
--- a/firmware/apps/jtag/jtag430.c
+++ b/firmware/apps/jtag/jtag430.c
@@ -4,6 +4,8 @@
 #include "jtag.h"
 
 
+unsigned int jtag430mode=MSP430X2MODE;
+
 //! Set the program counter.
 void jtag430_setpc(unsigned int adr){
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
@@ -79,30 +81,9 @@ void jtag430_writemem(unsigned int adr, unsigned int data){
   SETTCLK;
 }
 
-//! Pulse TCLK at 350kHz +/- 100kHz
-void jtag430_tclk_flashpulses(unsigned int i){
-  //TODO check this on a scope.
-  
-  //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(i--){
-    SETTCLK;
-    _NOP();
-    _NOP();
-    _NOP();
-    _NOP();
-    _NOP();
-    CLRTCLK;
-  }
-}
 
 //! Write data to flash memory.  Must be preconfigured.
 void jtag430_writeflashword(unsigned int adr, unsigned int data){
-  //jtag430_haltcpu();
   /*
   CLRTCLK;
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
@@ -124,10 +105,9 @@ void jtag430_writeflashword(unsigned int adr, unsigned int data){
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
   jtag_dr_shift16(0x2409);
   
-  
   //Pulse TCLK
-  jtag430_tclk_flashpulses(35);
-  //jtag430_releasecpu();
+  jtag430_tclk_flashpulses(35); //35 standard
+  
 }
 
 //! Configure flash, then write a word.
@@ -152,6 +132,27 @@ 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
@@ -160,6 +161,8 @@ 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
@@ -179,6 +182,8 @@ void jtag430_eraseflash(unsigned int mode, unsigned int adr, unsigned int count)
   
   //FCTL1=0xA500, disabling flash write
   jtag430_writemem(0x0128, 0xA500);
+  
+  jtag430_releasecpu();
 }
 
 
@@ -238,6 +243,9 @@ void jtag430_start(){
   SETRST;
   P5DIR&=~RST;
   delay(0xFFFF);
+  
+  //Perform a reset and disable watchdog.
+  jtag430_por();
 }
 
 //! Set CPU to Instruction Fetch
@@ -253,11 +261,12 @@ 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.
@@ -297,6 +306,8 @@ void jtag430handle(unsigned char app,
     txdata(app,verb,2);
     break;
   case JTAG430_ERASEFLASH:
+    jtag430_eraseflash(ERASE_MASS,0xFFFE,0xFFFF);
+    jtag430_eraseflash(ERASE_MASS,0xFFFE,0xFFFF);
     jtag430_eraseflash(ERASE_MASS,0xFFFE,0xFFFF);
     txdata(app,verb,0);
     break;
@@ -310,3 +321,16 @@ 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);
+  }
+}