Reading seems to work on MSP430X2, but some regions seem to be unpopulated.
[goodfet] / firmware / apps / jtag / jtag430x2.c
index 5cafafe..44d4941 100644 (file)
@@ -56,61 +56,70 @@ unsigned long jtag430_deviceid(){
   return jtag_dr_shift20(0);
 }
 
-//! Set the program counter.
-void jtag430x2_setpc(unsigned long pc){
-  //From SLAU265.
-  
-  unsigned short Mova;
-  unsigned short Pc_l;
-
-  Mova  = 0x0080;
-  Mova += (unsigned short)((pc>>8) & 0x00000F00);
-  Pc_l  = (unsigned short)((pc & 0xFFFF));
 
-  // Check Full-Emulation-State at the beginning                                                                                                                                   
+//! Write data to address
+unsigned int jtag430x2_writemem(unsigned long adr,
+                               unsigned long data){
   jtag_ir_shift8(IR_CNTRL_SIG_CAPTURE);
-  if(jtag_dr_shift16(0) & 0x0301){
-      // MOVA #imm20, PC                                                                                                                                                             
-      CLRTCLK;
-      // take over bus control during clock LOW phase                                                                                                                                
-      jtag_ir_shift8(IR_DATA_16BIT);
-      SETTCLK;
-      jtag_dr_shift16(Mova);
-      jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
-      jtag_dr_shift16(0x1400);
-      jtag_ir_shift8(IR_DATA_16BIT);
-      CLRTCLK;
-      SETTCLK;
-      jtag_dr_shift16(Pc_l);
-      CLRTCLK;
-      SETTCLK;
-      jtag_dr_shift16(0x4303);
-      CLRTCLK;
-      jtag_ir_shift8(IR_ADDR_CAPTURE);
-      jtag_dr_shift20(0x00000);
+  if(jtag_ir_shift8(0) & 0x0301){
+    CLRTCLK;
+    jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
+    if(adr>=0x100)
+      jtag_ir_shift8(0x0500);//word mode
+    else
+      jtag_ir_shift8(0x0510);//byte mode
+    jtag_ir_shift8(IR_ADDR_16BIT);
+    jtag_dr_shift20(adr);
+    
+    SETTCLK;
+    
+    jtag_ir_shift8(IR_DATA_TO_ADDR);
+    jtag_ir_shift8(data);//16 word
+
+    CLRTCLK;
+    jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
+    jtag_ir_shift8(0x0501);
+    SETTCLK;
+
+    CLRTCLK;
+    SETTCLK;
+    //init state
   }else{
-    while(1) P1OUT^=1; //Lock LED if locked up.
+    while(1) P1OUT^=1; //loop if locked up
   }
 }
 
-
 //! Read data from address
-unsigned int jtag430x2_readmem(unsigned int adr){
-  unsigned int toret;
-  
-  jtag430x2_setpc(adr);
-  SETTCLK;
-  jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
-  jtag_dr_shift16(0x0501);
-  jtag_ir_shift8(IR_ADDR_CAPTURE);
+unsigned int jtag430x2_readmem(unsigned long adr){
+  unsigned int toret=0;
 
-  jtag_ir_shift8(IR_DATA_QUICK);
+  jtag_ir_shift8(IR_CNTRL_SIG_CAPTURE);
+  if(jtag_dr_shift16(0) & 0x0301){
+    // Read Memory                                                                                                                                                                 
+    CLRTCLK;
+    jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
+    if(adr>=0x100){
+      jtag_dr_shift16(0x0501);//word read
+    }else{
+      jtag_dr_shift16(0x0511);//byte read
+    }
+    jtag_ir_shift8(IR_ADDR_16BIT);
+    jtag_dr_shift20(adr); //20
 
-  SETTCLK;
-  CLRTCLK;
-  toret = jtag_dr_shift16(0);//read
+    jtag_ir_shift8(IR_DATA_TO_ADDR);
+    SETTCLK;
+    CLRTCLK;
+    toret = jtag_dr_shift16(0x0000);
+    
+    SETTCLK;
+    // one or more cycle, so CPU is driving correct MAB
 
-  jtag_ir_shift8(IR_CNTRL_SIG_CAPTURE);
+    CLRTCLK;
+    SETTCLK;
+    // Processor is now again in Init State
+  }else{
+    return 0xDEAD;
+  }
   
   return toret;
 }
@@ -120,7 +129,7 @@ unsigned int jtag430x2_readmem(unsigned int adr){
 void jtag430x2handle(unsigned char app,
                   unsigned char verb,
                   unsigned char len){
-  
+  jtag430_resettap();
   switch(verb){
   case START:
     //Enter JTAG mode.
@@ -162,6 +171,11 @@ void jtag430x2handle(unsigned char app,
   case JTAG430_SETINSTRFETCH:
   case JTAG430_WRITEMEM:
   case POKE:
+    jtag430x2_writemem(cmddataword[0],
+                      cmddataword[1]);
+    cmddataword[0]=jtag430x2_readmem(cmddataword[0]);
+    txdata(app,verb,2);
+    break;
   case JTAG430_WRITEFLASH:
   case JTAG430_ERASEFLASH:
   case JTAG430_SETPC: