+/*! \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);
CLRTCLK;
jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
+
if(adr>0xFF)
jtag_dr_shift16(0x2409);//word read
else
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){
/*
+//! 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
//! 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
//FCTL1=0xA500, disabling flash write
jtag430_writemem(0x0128, 0xA500);
+
+ jtag430_releasecpu();
}
void jtag430_resettap(){
int i;
// Settle output
+ SETTDI; //430X2
SETTMS;
- SETTDI;
+ //SETTDI; //classic
SETTCK;
// Navigate to reset state.
/* sacred, by spec.
- Sometimes this isn't necessary. */
+ Sometimes this isn't necessary. */
// fuse check
CLRTMS;
delay(50);
SETRST;
P5DIR&=~RST;
delay(0xFFFF);
+
+ //Perform a reset and disable watchdog.
+ jtag430_por();
}
//! Set CPU to Instruction Fetch
}
}
-//! 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:
jtag430_setinstrfetch();
txdata(app,verb,0);
break;
-
case JTAG430_READMEM:
case PEEK:
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:
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);
+ }
+}