unsigned int jtag430mode=MSP430X2MODE;
-//! Set the program counter.
-void jtag430_setpc(unsigned int adr){
+//! Set a register.
+void jtag430_setr(u8 reg, u16 val){
jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
jtag_dr_shift16(0x3401);// release low byte
jtag_ir_shift8(IR_DATA_16BIT);
- jtag_dr_shift16(0x4030);//Instruction to load PC
+
+ //0x4030 is "MOV #foo, r0"
+ //Right-most field is register, so 0x4035 loads r5
+ jtag_dr_shift16(0x4030+reg);
CLRTCLK;
SETTCLK;
- jtag_dr_shift16(adr);// Value for PC
+ jtag_dr_shift16(val);// Value for the register
CLRTCLK;
jtag_ir_shift8(IR_ADDR_CAPTURE);
SETTCLK;
- CLRTCLK ;// Now PC is set to "PC_Value"
+ CLRTCLK ;// Now reg is set to new value.
jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
jtag_dr_shift16(0x2401);// low byte controlled by JTAG
}
+//! Set the program counter.
+void jtag430_setpc(unsigned int adr){
+ jtag430_setr(0,adr);
+}
+
//! Halt the CPU
void jtag430_haltcpu(){
//jtag430_setinstrfetch();
else
jtag_dr_shift16(0x2419);//byte read
jtag_ir_shift8(IR_ADDR_16BIT);
- jtag_dr_shift16(adr);//address
+ jtag_dr_shiftadr(adr);//address
jtag_ir_shift8(IR_DATA_TO_ADDR);
SETTCLK;
else
jtag_dr_shift16(0x2418);//byte write
jtag_ir_shift8(IR_ADDR_16BIT);
- jtag_dr_shift16(adr);
+ jtag_dr_shiftadr(adr);
jtag_ir_shift8(IR_DATA_TO_ADDR);
jtag_dr_shift16(data);
SETTCLK;
jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
jtag_dr_shift16(0x2408);//word write
jtag_ir_shift8(IR_ADDR_16BIT);
- jtag_dr_shift16(adr);
+ jtag_dr_shiftadr(adr);
jtag_ir_shift8(IR_DATA_TO_ADDR);
jtag_dr_shift16(data);
SETTCLK;
SETTDI; //430X2
SETTMS;
//SETTDI; //classic
- SETTCK;
+ TCKTOCK;
// Navigate to reset state.
// Should be at least six.
for(i=0;i<4;i++){
- CLRTCK;
- SETTCK;
+ TCKTOCK;
}
// test-logic-reset
- CLRTCK;
CLRTMS;
- SETTCK;
+ TCKTOCK;
SETTMS;
// idle
SETTST;
SETRST;
delay(0xFFFF);
-
+
+
+ #ifndef SBWREWRITE
//Entry sequence from Page 67 of SLAU265A for 4-wire MSP430 JTAG
CLRRST;
delay(100); //100
SETRST;
P5DIR&=~RST;
delay(0xFFFF);
+ #endif
//Perform a reset and disable watchdog.
jtag430_por();
jtag430_haltcpu();
}
+//! Stop JTAG.
+void jtag430_stop(){
+ debugstr("Exiting JTAG.");
+ jtagsetup();
+
+ //Known-good starting position.
+ //Might be unnecessary.
+ //SETTST;
+ CLRTST;
+ SETRST;
+ delay(0xFFFF);
+
+ //Entry sequence from Page 67 of SLAU265A for 4-wire MSP430 JTAG
+ CLRRST;
+ delay(0xFFFF);
+ SETRST;
+ //P5DIR&=~RST;
+ //delay(0xFFFF);
+
+}
+
//! Set CPU to Instruction Fetch
void jtag430_setinstrfetch(){
//debugstr("Classic MSP430 handler.");
+
+ /* FIXME
+ * Sometimes JTAG doesn't init correctly.
+ * This restarts the connection if the masked-rom
+ * chip ID cannot be read. Should print warning
+ * for testing server.
+ */
+ while((i=jtag430_readmem(0xff0))==0xFFFF){
+ jtag430_start();
+ P1OUT^=1;
+ }
+ P1OUT&=~1;
+
+
switch(verb){
case START:
//Enter JTAG mode.
//TAP setup, fuse check
jtag430_resettap();
+ cmddata[0]=jtag_ir_shift8(IR_BYPASS);
+ txdata(app,verb,1);
+
+ break;
+ case STOP:
+ jtag430_stop();
txdata(app,verb,0);
break;
case JTAG430_HALTCPU:
len=(cmddataword[2]);//always even.
else
len=2;
- len&=~1;//clue lsbit
+ len&=~1;//clear lsbit
txhead(app,verb,len);
for(i=0;i<len;i+=2){
cmddataword[0]=jtag430_readmem(cmddataword[0]);
txdata(app,verb,2);
break;
+ /*
case JTAG430_WRITEFLASH:
+
//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]);
+ //if(cmddataword[2]!=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_WRITEFLASH:
+ at=cmddataword[0];
+
+ for(i=0;i<(len>>1)-2;i++){
+ //debugstr("Poking flash memory.");
+ jtag430_writeflash(at+(i<<1),cmddataword[i+2]);
+ //Reflash if needed. Try this twice to save grace?
+ if(cmddataword[i]!=jtag430_readmem(at))
+ jtag430_writeflash(at+(i<<1),cmddataword[i+2]);
+ }
+
+ //Return result of first write as a word.
+ cmddataword[0]=jtag430_readmem(cmddataword[0]);
+
txdata(app,verb,2);
break;
case JTAG430_ERASEFLASH:
jtag430_setpc(cmddataword[0]);
txdata(app,verb,0);
break;
-
+ case JTAG430_SETREG:
+ jtag430_setr(cmddata[0],cmddataword[1]);
+ txdata(app,verb,0);
+ break;
+ case JTAG430_GETREG:
+ //jtag430_getr(cmddata[0]);
+ debugstr("JTAG430_GETREG not yet implemented.");
+ cmddataword[0]=0xDEAD;
+ txdata(app,verb,2);
+ break;
case JTAG430_COREIP_ID:
case JTAG430_DEVICE_ID:
cmddataword[0]=0;