Dropped ugly 'blocks' kludge for a 16-bit length field.

[goodfet] / firmware / apps / jtag / jtag430.c

diff --git a/firmware/apps/jtag/jtag430.c b/firmware/apps/jtag/jtag430.c
index cf5179d..d0b83cb 100644 (file)
--- a/firmware/apps/jtag/jtag430.c
+++ b/firmware/apps/jtag/jtag430.c
@@ -52,6 +52,7 @@ void jtag430_releasecpu(){
 //! Read data from address
 unsigned int jtag430_readmem(unsigned int adr){
   unsigned int toret;
+  jtag430_haltcpu();
   
   CLRTCLK;
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
@@ -88,7 +89,7 @@ void jtag430_writemem(unsigned int adr, unsigned int data){
 
 //! Write data to flash memory.  Must be preconfigured.
 void jtag430_writeflashword(unsigned int adr, unsigned int data){
-  /*
+  
   CLRTCLK;
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
   jtag_dr_shift16(0x2408);//word write
@@ -102,16 +103,16 @@ void jtag430_writeflashword(unsigned int adr, unsigned int data){
   CLRTCLK;
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
   jtag_dr_shift16(0x2409);
-  */
   
+  /*
   jtag430_writemem(adr,data);
   CLRTCLK;
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
   jtag_dr_shift16(0x2409);
+  */
   
   //Pulse TCLK
   jtag430_tclk_flashpulses(35); //35 standard
-  
 }
 
 //! Configure flash, then write a word.
@@ -123,7 +124,7 @@ void jtag430_writeflash(unsigned int adr, unsigned int data){
   //FCTL2=0xA540, selecting MCLK as source, DIV=1
   jtag430_writemem(0x012A, 0xA540);
   //FCTL3=0xA500, should be 0xA540 for Info Seg A on 2xx chips.
-  jtag430_writemem(0x012C, 0xA500);
+  jtag430_writemem(0x012C, 0xA500); //all but info flash.
   
   //Write the word itself.
   jtag430_writeflashword(adr,data);
@@ -131,7 +132,7 @@ void jtag430_writeflash(unsigned int adr, unsigned int data){
   //FCTL1=0xA500, disabling flash write
   jtag430_writemem(0x0128, 0xA500);
   
-  jtag430_releasecpu();
+  //jtag430_releasecpu();
 }
 
 
@@ -187,7 +188,7 @@ void jtag430_eraseflash(unsigned int mode, unsigned int adr, unsigned int count)
   //FCTL1=0xA500, disabling flash write
   jtag430_writemem(0x0128, 0xA500);
   
-  jtag430_releasecpu();
+  //jtag430_releasecpu();
 }
 
 
@@ -251,10 +252,14 @@ void jtag430_start(){
   
   //Perform a reset and disable watchdog.
   jtag430_por();
+  jtag430_writemem(0x120,0x5a80);//disable watchdog
+  
+  jtag430_haltcpu();
 }
 
 //! Set CPU to Instruction Fetch
 void jtag430_setinstrfetch(){
+  
   jtag_ir_shift8(IR_CNTRL_SIG_CAPTURE);
 
   // Wait until instruction fetch state.
@@ -268,9 +273,14 @@ void jtag430_setinstrfetch(){
 
 
 //! Handles classic MSP430 JTAG commands.  Forwards others to JTAG.
-void oldjtag430handle(unsigned char app,
+void jtag430handle(unsigned char app,
                   unsigned char verb,
-                  unsigned char len){
+                  unsigned long len){
+  register char blocks;
+  unsigned long at;
+  unsigned int i, val;
+  
+  //debugstr("Classic MSP430 handler.");
   
   switch(verb){
   case START:
@@ -296,27 +306,52 @@ void oldjtag430handle(unsigned char app,
     
   case JTAG430_READMEM:
   case PEEK:
-    cmddataword[0]=jtag430_readmem(cmddataword[0]);
-    txdata(app,verb,2);
+    at=cmddatalong[0];
+    
+    //Fetch large blocks for bulk fetches,
+    //small blocks for individual peeks.
+    if(len>5)
+      len=(cmddataword[2]);//always even.
+    else
+      len=2;
+    len&=~1;//clue lsbit
+    
+    txhead(app,verb,len);
+    for(i=0;i<len;i+=2){
+      jtag430_resettap();
+      val=jtag430_readmem(at);
+      
+      at+=2;
+      serial_tx(val&0xFF);
+      serial_tx((val&0xFF00)>>8);
+    }
     break;
   case JTAG430_WRITEMEM:
   case POKE:
-    jtag430_writemem(cmddatalong[0],cmddataword[2]);
-    cmddataword[0]=jtag430_readmem(cmddatalong[0]);
+    jtag430_haltcpu();
+    jtag430_writemem(cmddataword[0],cmddataword[2]);
+    cmddataword[0]=jtag430_readmem(cmddataword[0]);
     txdata(app,verb,2);
     break;
   case JTAG430_WRITEFLASH:
-    jtag430_writeflash(cmddataword[0],cmddataword[1]);
+    //debugstr("Poking flash memory.");
+    jtag430_writeflash(cmddataword[0],cmddataword[2]);
+    
+    //Try again if failure.
+    if(cmddataword[0]!=jtag430_readmem(cmddataword[0]))
+      jtag430_writeflash(cmddataword[0],cmddataword[2]);
+    
+    //Return result.
     cmddataword[0]=jtag430_readmem(cmddataword[0]);
+    
     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);
+    jtag430_eraseflash(ERASE_MASS,0xFFFE,0x3000);
     txdata(app,verb,0);
     break;
   case JTAG430_SETPC:
+    jtag430_haltcpu();
     jtag430_setpc(cmddataword[0]);
     txdata(app,verb,0);
     break;
@@ -331,19 +366,5 @@ void oldjtag430handle(unsigned char app,
   default:
     jtaghandle(app,verb,len);
   }
-  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);
-  }
+  //jtag430_resettap();  //DO NOT UNCOMMENT
 }