#include "platform.h"
#include "command.h"
+#include "jtag.h"
#include "jtagarm7.h"
+//! Handles ARM7TDMI JTAG commands. Forwards others to JTAG.
+void jtagarm7_handle_fn( uint8_t const app,
+ uint8_t const verb,
+ uint32_t const len);
+
+// define the jtagarm7 app's app_t
+app_t const jtagarm7_app = {
+
+ /* app number */
+ JTAGARM7,
+
+ /* handle fn */
+ jtagarm7_handle_fn,
+
+ /* name */
+ "JTAGARM7",
+
+ /* desc */
+ "\tThe JTAGARM7 app extends the basic JTAG app with support\n"
+ "\tfor JTAG'ing ARM7TDMI based devices.\n"
+};
+
+unsigned long last_instr = -1;
+unsigned char last_sysstate = 0;
+unsigned char last_ir = -1;
+unsigned char last_scanchain = -1;
+unsigned char current_dbgstate = -1;
+unsigned char g_jtag_ir_size = 4;
+unsigned char g_jtagarm_scan_n_bitsize = 4;
+//unsigned char last_halt_debug_state = -1;
+//unsigned long last_halt_pc = -1;
/**** 20-pin Connection Information (pin1 is on top-right for both connectors)****
GoodFET -> 7TDMI 20-pin connector (HE-10 connector)
3 5 (TDI)
5 7 (TMS)
7 9 (TCK)
- 8 15 (nRST)
9 4,6,8,10,12,14,16,18,20 (GND)
- 11 17/3 (nTRST) (different sources suggest 17 or 3 alternately)
+ 11 15 (nRST)
+ // no longer... (11 17/3 (nTRST) (different sources suggest 17 or 3 alternately))
********************************/
/**** 14-pin Connection Information (pin1 is on top-right for both connectors)****
3 5 (TDI)
5 7 (TMS)
7 9 (TCK)
- 8 12 (nRST)
9 2,4,6,8,10,14 (GND)
- 11 3 (nTRST)
+ 11 12 (nRST)
+ // no longer... (11 3 (nTRST))
http://hri.sourceforge.net/tools/jtag_faq_org.html
********************************/
/* WHAT SHOULD THIS MODULE DO?
* *start
- * *shift_ir
+ * *jtagarm_shift_ir
* *shift_dr
* reset_tap
* *scanchain0
// ! Start JTAG, setup pins, reset TAP and return IDCODE
void jtagarm7tdmi_start() {
- jtagsetup();
+ jtag_setup();
SETTST;
- jtag_resettap();
+ jtag_reset_tap();
}
-u8 shift_ir(u8 ir, u8 flags){
- u8 retval;
- jtag_goto_shift_ir();
- retval = jtagtransn(ir, 4, LSB|flags);
+u8 jtagarm_shift_ir(u8 ir, u8 flags){
+ u8 retval = 0;
+ if (last_ir != ir){
+ jtag_capture_ir();
+ jtag_shift_register();
+ retval = jtag_trans_n(ir, g_jtag_ir_size, LSB|flags);
+ last_ir = ir;
+ }
return retval;
}
commands occur. Therefore, it is recommended to pass directly from the “Update”
state” to the “Select DR” state each time the “Update” state is reached.
*/
- unsigned long retval;
- shift_ir(ARM7TDMI_IR_SCAN_N, NORETIDLE);
- jtag_goto_shift_dr();
- retval = jtagtransn(chain, 4, LSB | NORETIDLE);
- shift_ir(testmode, NORETIDLE);
+ unsigned long retval = 0;
+ if (last_scanchain != chain){
+ jtagarm_shift_ir(ARM7TDMI_IR_SCAN_N, NORETIDLE);
+ last_scanchain = chain;
+ jtag_capture_dr();
+ jtag_shift_register();
+ retval = jtag_trans_n(chain, g_jtagarm_scan_n_bitsize, LSB | NORETIDLE);
+ }
+ jtagarm_shift_ir(testmode, NORETIDLE);
return(retval);
}
/************************* EmbeddedICE Primitives ****************************/
//! shifter for writing to chain2 (EmbeddedICE).
unsigned long eice_write(unsigned char reg, unsigned long data){
- unsigned long retval, temp;
+ unsigned long retval;
jtagarm7tdmi_scan(2, ARM7TDMI_IR_INTEST);
- jtag_goto_shift_dr();
- retval = jtagtransn(data, 32, LSB| NOEND| NORETIDLE); // send in the data - 32-bits lsb
- temp = jtagtransn(reg, 5, LSB| NOEND| NORETIDLE); // send in the register address - 5 bits lsb
- jtagtransn(1, 1, LSB); // send in the WRITE bit
+ jtag_capture_dr();
+ jtag_shift_register();
+ retval = jtag_trans_n(data, 32, LSB| NOEND| NORETIDLE); // send in the data - 32-bits lsb
+ jtag_trans_n(reg, 5, LSB| NOEND| NORETIDLE); // send in the register address - 5 bits lsb
+ jtag_trans_n(1, 1, LSB); // send in the WRITE bit
return(retval);
}
//! shifter for reading from chain2 (EmbeddedICE).
unsigned long eice_read(unsigned char reg){ // PROVEN
- unsigned long temp, retval;
+ unsigned long retval;
jtagarm7tdmi_scan(2, ARM7TDMI_IR_INTEST);
- jtag_goto_shift_dr(); // send in the register address - 5 bits LSB
- temp = jtagtransn(reg, 5, LSB| NOEND| NORETIDLE);
- jtagtransn(0L, 1, LSB); // clear TDI to select "read only"
- jtag_goto_shift_dr(); // Now shift out the 32 bits
- retval = jtagtransn(0L, 32, LSB); // atmel arm jtag docs pp.10-11: LSB first
+ jtag_capture_dr();
+ jtag_shift_register(); // send in the register address - 5 bits LSB
+ jtag_trans_n(reg, 5, LSB| NOEND| NORETIDLE);
+ jtag_trans_n(0L, 1, LSB); // clear TDI to select "read only"
+ jtag_capture_dr();
+ jtag_shift_register(); // Now shift out the 32 bits
+ retval = jtag_trans_n(0L, 32, LSB); // atmel arm jtag docs pp.10-11: LSB first
return(retval);
}
//! push an instruction into the pipeline
unsigned long jtagarm7tdmi_instr_primitive(unsigned long instr, char breakpt){ // PROVEN
- unsigned long retval;
+ unsigned long retval = 0;
jtagarm7tdmi_scan(1, ARM7TDMI_IR_INTEST);
- debughex32(instr);
- jtag_goto_shift_dr();
- // if the next instruction is to run using MCLK (master clock), set TDI
- if (breakpt)
- {
- SETMOSI;
- }
- else
- {
- CLRMOSI;
- }
- jtag_tcktock();
-
- // Now shift in the 32 bits
- retval = jtagtransn(instr, 32, 0); // Must return to RUN-TEST/IDLE state for instruction to enter pipeline, and causes debug clock.
+ //if (!(last_instr == instr && last_sysstate == breakpt))
+ {
+ jtag_capture_dr();
+ jtag_shift_register();
+ // if the next instruction is to run using MCLK (master clock), set TDI
+ if (breakpt)
+ {
+ //debugstr("--breakpt flag set");
+ SETMOSI;
+ }
+ else
+ {
+ CLRMOSI;
+ }
+ jtag_tcktock();
+
+ // Now shift in the 32 bits
+ retval = jtag_trans_n(instr, 32, 0); // Must return to RUN-TEST/IDLE state for instruction to enter pipeline, and causes debug clock.
+ last_instr = instr;
+ last_sysstate = breakpt;
+ }
+ return(retval);
+}
+
+//! push an instruction into the pipeline
+unsigned long jtagarm_instr_primitive(unsigned char *instr, char breakpt){
+ unsigned long retval = 0;
+ jtagarm7tdmi_scan(1, ARM7TDMI_IR_INTEST);
+
+ //if (!(last_instr == instr && last_sysstate == breakpt))
+ {
+ jtag_capture_dr();
+ jtag_shift_register();
+
+ // if the next instruction is to run using MCLK (master clock), set TDI
+ if (breakpt)
+ { SETMOSI; }
+ else
+ { CLRMOSI; }
+ jtag_tcktock();
+
+ // Now shift in the 32 bits
+ retval = jtag_trans_many(instr, 32, 0); // Must return to RUN-TEST/IDLE state for instruction to enter pipeline, and causes debug clock.
+ last_instr = *instr;
+ last_sysstate = breakpt;
+ }
return(retval);
}
u32 jtagarm7tdmi_nop(u8 brkpt){
// WARNING: current_dbgstate must be up-to-date before calling this function!!!!!
+ //debugstr("jtagarm7tdmi_nop");
if (current_dbgstate & JTAG_ARM7TDMI_DBG_TBIT)
return jtagarm7tdmi_instr_primitive(THUMB_INSTR_NOP, brkpt);
return jtagarm7tdmi_instr_primitive(ARM_INSTR_NOP, brkpt);
/******************** Complex Commands **************************/
//! Retrieve a 32-bit Register value
-unsigned long jtagarm7tdmi_get_register(unsigned long reg) { //PROVEN
- unsigned long retval=0L, instr;
- current_dbgstate = eice_read(EICE_DBGSTATUS);
- if (current_dbgstate & JTAG_ARM7TDMI_DBG_TBIT)
- instr = (unsigned long)(THUMB_READ_REG | (unsigned long)reg | (unsigned long)(reg<<16L));
- else
- instr = (unsigned long)(reg<<12L) | (unsigned long)ARM_READ_REG; // STR Rx, [R14]
-
- //debughex32(instr);
+unsigned long jtagarm7_get_reg_prim(unsigned long instr){
+ //debugstr("jtagarm7_get_reg_prim");
jtagarm7tdmi_nop( 0);
jtagarm7tdmi_instr_primitive(instr, 0);
jtagarm7tdmi_nop( 0);
jtagarm7tdmi_nop( 0);
jtagarm7tdmi_nop( 0);
- retval = jtagarm7tdmi_nop( 0); // recover 32-bit word
- return retval;
+ return jtagarm7tdmi_nop( 0); // recover 32-bit word
+}
+
+//! Set a 32-bit Register value
+void jtagarm7_set_reg_prim(unsigned long instr, unsigned long reg, unsigned long val){ // PROVEN - 100827 (non-PC)
+ jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
+ jtagarm7tdmi_instr_primitive(instr, 0); // push instr into pipeline - fetch
+ jtagarm7tdmi_nop( 0); // push nop into pipeline - decode
+ jtagarm7tdmi_nop( 0); // push nop into pipeline - execute
+ jtagarm7tdmi_instr_primitive(val, 0); // push 32-bit word on data bus
+ if (reg == ARM_REG_PC){
+ //debugstr("setting pc...");
+ jtagarm7tdmi_nop( 0); // push nop into pipeline - refill
+ jtagarm7tdmi_nop( 0); // push nop into pipeline - refill
+ }
+ jtagarm7tdmi_nop( 0); // push nop into pipeline - decode
+ jtagarm7tdmi_nop( 0); // push nop into pipeline - execute
+}
+
+void jtagarm7_thumb_swap_reg(unsigned char dir, unsigned long reg){ // PROVEN - 100827
+ reg = reg & 7;
+ jtagarm7tdmi_nop( 0);
+ if (dir){
+ jtagarm7tdmi_instr_primitive((unsigned long)(THUMB_INSTR_MOV_LoHi | (reg) | (reg<<16)), 0);
+ } else {
+ jtagarm7tdmi_instr_primitive((unsigned long)(THUMB_INSTR_MOV_HiLo | (reg<<3) | (reg<<19)), 0);
+ }
+ jtagarm7tdmi_nop( 0);
+ jtagarm7tdmi_nop( 0);
+ jtagarm7tdmi_nop( 0);
+}
+
+unsigned long jtagarm7tdmi_get_register(unsigned long reg) { // PROVEN - 100827
+ unsigned long retval=0L, instr, r0;
+ current_dbgstate = eice_read(EICE_DBGSTATUS);
+ //debugstr("current_dbgstate:");
+ //debughex32(current_dbgstate);
+
+ if (current_dbgstate & JTAG_ARM7TDMI_DBG_TBIT){
+ if (reg > 7){
+ //debugstr("debug: jtagarm7tdmi_get_register: thumb reg > 15");
+ reg = reg & 7;
+ r0 = jtagarm7_get_reg_prim( THUMB_READ_REG); // save reg0
+ jtagarm7_thumb_swap_reg(THUMB_SWAP_HiLo, reg); // clobber reg0 with hi reg
+ retval = jtagarm7_get_reg_prim( THUMB_READ_REG); // recover 32-bit word
+ jtagarm7_set_reg_prim( THUMB_WRITE_REG, 0, r0); // restore r0
+ return retval;
+ } else {
+ //debugstr("debug: jtagarm7tdmi_get_register: thumb reg < 15");
+ instr = (unsigned long)(THUMB_READ_REG | (unsigned long)reg | (unsigned long)(reg<<16L));
+ }
+ } else
+ {
+ //debugstr("debug: jtagarm7tdmi_get_register: arm");
+ instr = (reg<<12L) | ARM_READ_REG; // STR Rx, [R14]
+ }
+ return jtagarm7_get_reg_prim(instr);
}
//! Set a 32-bit Register value
// this set_register implementation normalizes this process at the cost of performance. since we don't know what's in the register, we set it to 0 first
// we could use r14 and hope all is well, but only for arm, not thumb mode, and not always is all well then either. this is a performance trade-off we may have to revisit later
//
-void jtagarm7tdmi_set_register(unsigned long reg, unsigned long val) { // PROVEN (assuming target reg is word aligned)
- unsigned long instr;
+void jtagarm7tdmi_set_register(unsigned long reg, unsigned long val) { // PROVEN - 100827
+ unsigned long instr, r0;
current_dbgstate = eice_read(EICE_DBGSTATUS);
if (current_dbgstate & JTAG_ARM7TDMI_DBG_TBIT){
- instr = THUMB_WRITE_REG | (reg&7) | ((reg&7)<<16) | ((reg&7)<<3) | ((reg&7)<<19);
+ if (reg > 7){
+
+ r0 = jtagarm7_get_reg_prim(THUMB_READ_REG);
+ jtagarm7_set_reg_prim(THUMB_WRITE_REG, 0, 0);
+ instr = (unsigned long)(THUMB_WRITE_REG | (unsigned long)reg | (unsigned long)(reg<<16L));
+ jtagarm7_set_reg_prim(instr, reg, val);
+ jtagarm7_thumb_swap_reg(THUMB_SWAP_LoHi, reg); // place 32-bit word into a high register
+ jtagarm7_set_reg_prim( THUMB_WRITE_REG, 0, r0); // restore r0
+ } else
+ instr = THUMB_WRITE_REG | (reg) | ((reg)<<16) | ((reg)<<3) | ((reg)<<19);
} else {
instr = ARM_WRITE_REG | (reg<<12L) | (reg<<16); // LDR Rx, [R14]
}
//debughex32(instr);
// --- first time to clear the register... this ensures the write is not 8-bit offset ---
- jtagarm7tdmi_nop( 0); // push nop into pipeline - clean out the pipeline...
- jtagarm7tdmi_nop( 0); // push nop into pipeline - clean out the pipeline...
- jtagarm7tdmi_instr_primitive(instr, 0); // push instr into pipeline - fetch
- if (reg == ARM_REG_PC){
- jtagarm7tdmi_instr_primitive(0, 0); // push 32-bit word on data bus
- jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
- jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
- } else {
- jtagarm7tdmi_nop( 0); // push nop into pipeline - decode
- jtagarm7tdmi_nop( 0); // push nop into pipeline - execute
- jtagarm7tdmi_instr_primitive(0, 0); // push 32-bit word on data bus
- }
+ jtagarm7_set_reg_prim(instr, reg, 0);
// --- now we actually write to the register ---
- jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
- jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
- jtagarm7tdmi_instr_primitive(instr, 0); // push instr into pipeline - fetch
- if (reg == ARM_REG_PC){
- jtagarm7tdmi_instr_primitive(val, 0); // push 32-bit word on data bus
- jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
- jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
- } else {
- jtagarm7tdmi_nop( 0); // push nop into pipeline - decode
- jtagarm7tdmi_nop( 0); // push nop into pipeline - execute
- jtagarm7tdmi_instr_primitive(val, 0); // push 32-bit word on data bus
- }
- jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
- jtagarm7tdmi_nop( 0); // push nop into pipeline - executed
- jtagarm7tdmi_nop( 0);
+ jtagarm7_set_reg_prim(instr, reg, val);
}
///////////////////////////////////////////////////////////////////////////////////////////////////
//! Handles ARM7TDMI JTAG commands. Forwards others to JTAG.
-void jtagarm7tdmihandle(unsigned char app, unsigned char verb, unsigned long len){
+void jtagarm7_handle_fn( uint8_t const app,
+ uint8_t const verb,
+ uint32_t const len)
+{
unsigned int val;
switch(verb){
jtagarm7tdmi_start();
txdata(app,verb,0);
break;
+ case JTAGARM7_SCAN_N_SIZE:
+ g_jtagarm_scan_n_bitsize = cmddata[0];
+ txdata(app,verb,1);
+ break;
+ case JTAGARM7_IR_SIZE:
+ g_jtag_ir_size = cmddata[0];
+ txdata(app,verb,1);
+ break;
case JTAG_IR_SHIFT:
- cmddataword[0] = shift_ir(cmddata[0], cmddata[1]);
+ cmddataword[0] = jtagarm_shift_ir(cmddata[0], cmddata[1]);
txdata(app,verb,1);
break;
case JTAG_DR_SHIFT:
- jtag_goto_shift_dr();
- cmddatalong[0] = jtagtransn(cmddatalong[1],cmddata[0],cmddata[1]);
- txdata(app,verb,4);
+ jtag_capture_dr();
+ jtag_shift_register();
+ val = cmddata[0];
+ if (cmddata[0] > 32)
+ {
+ //debughex32(cmddatalong[0]);
+ //debughex32(cmddatalong[1]);
+ cmddatalong[1] = jtag_trans_n(cmddatalong[2], val - 32 ,cmddata[1] | NOEND |NORETIDLE);
+ cmddatalong[0] = jtag_trans_n(cmddatalong[2], 32, cmddata[1]);
+ }
+ else
+ {
+ //debughex32(cmddatalong[0]);
+ cmddatalong[0] = jtag_trans_n(cmddatalong[1], val, cmddata[1]);
+ }
+ txdata(app,verb,val/8);
+ break;
+ case JTAG_DR_SHIFT_MORE:
+ // assumes you just executed JTAG_DR_SHIFT with NOEND flag set
+ debugstr("JTAG_DR_SHIFT_MORE");
+ val = cmddata[0];
+ if (cmddata[0] > 32)
+ {
+ //debughex32(cmddatalong[0]);
+ //debughex32(cmddatalong[1]);
+ cmddatalong[1] = jtag_trans_n(cmddatalong[2], val - 32 ,cmddata[1] | NOEND |NORETIDLE);
+ cmddatalong[0] = jtag_trans_n(cmddatalong[2], 32, cmddata[1]);
+ }
+ else
+ {
+ debughex32(cmddatalong[0]);
+ cmddatalong[0] = jtag_trans_n(cmddatalong[1], val, cmddata[1]);
+ }
+ txdata(app,verb,val/8);
+ break;
+ case JTAG_DR_SHIFT_MANY:
+ jtag_capture_dr();
+ jtag_shift_register();
+ val = cmddata[0];
+ jtag_trans_many(&cmddata[2], val, cmddata[1] );
+ txdata(app,verb,((val+7)/8)+2);
break;
case JTAGARM7_CHAIN0:
jtagarm7tdmi_scan(0, ARM7TDMI_IR_INTEST);
- jtag_goto_shift_dr();
+ jtag_capture_dr();
+ jtag_shift_register();
//debughex32(cmddatalong[0]);
//debughex(cmddataword[4]);
//debughex32(cmddatalong[1]);
//debughex32(cmddatalong[3]);
- cmddatalong[0] = jtagtransn(cmddatalong[0], 32, LSB| NOEND| NORETIDLE);
- cmddatalong[2] = jtagtransn(cmddataword[4], 9, MSB| NOEND| NORETIDLE);
- cmddatalong[1] = jtagtransn(cmddatalong[1], 32, MSB| NOEND| NORETIDLE);
- cmddatalong[3] = jtagtransn(cmddatalong[3], 32, MSB);
+ cmddatalong[0] = jtag_trans_n(cmddatalong[0], 32, LSB| NOEND| NORETIDLE);
+ cmddatalong[2] = jtag_trans_n(cmddataword[4], 9, MSB| NOEND| NORETIDLE);
+ cmddatalong[1] = jtag_trans_n(cmddatalong[1], 32, MSB| NOEND| NORETIDLE);
+ cmddatalong[3] = jtag_trans_n(cmddatalong[3], 32, MSB);
txdata(app,verb,16);
break;
case JTAGARM7_SCANCHAIN1:
cmddatalong[0] = jtagarm7tdmi_instr_primitive(cmddatalong[0],cmddata[4]);
txdata(app,verb,4);
break;
+ case JTAGARM_SCAN1_MANY:
+ cmddatalong[0] = jtagarm_instr_primitive(&cmddata[1],cmddata[0]);
+ txdata(app,verb,4);
+ break;
case JTAGARM7_EICE_READ:
cmddatalong[0] = eice_read(cmddata[0]);
txdata(app,verb,0x4);
jtagarm7tdmi_set_register(cmddatalong[1], cmddatalong[0]);
txdata(app,verb,4);
break;
- case JTAG_RESETTARGET:
- CLRTST;
- delay(10);
- SETTST;
+ case JTAG_RESET_TARGET:
+ //FIXME: BORKEN
+ debugstr("RESET TARGET");
+ //debughex((P3OUT&RST));
+ CLRRST;
+ //debughex((P3OUT&RST));
+ delay(cmddataword[0]);
+ SETRST;
+ //debughex((P3OUT&RST));
+ txdata(app,verb,4);
break;
case JTAGARM7_CHIP_ERASE:
*/
default:
- jtaghandle(app,verb,len);
+ (*(jtag_app.handle))(app,verb,len);
}
}
+#define min(x,y) ( (x>y) ? y : x )
+#define max(x,y) ( (x>y) ? x : y )
+
+uint8_t* jtag_trans_many(uint8_t *data,
+ uint8_t bitcount,
+ enum eTransFlags flags)
+{
+ uint8_t bit;
+ uint16_t high;
+ uint16_t mask;
+ uint16_t hmask;
+ uint8_t bitnum = 0;
+
+ if (!in_state(SHIFT_IR | SHIFT_DR))
+ {
+ debugstr("jtag_trans_many from invalid TAP state");
+ return 0;
+ }
+
+ SAVETCLK;
+
+ if (flags & LSB)
+ {
+ high = (1L << (min(bitcount,8) - 1));
+ mask = high - 1;
+
+ for (bit = bitcount; bit > 0; bit--,bitnum++)
+ {
+ if (bitnum == 8)
+ {
+ high = (1L << (min(bit,8) - 1));
+ mask = high - 1;
+ bitnum = 0;
+ data ++;
+ }
+ /* write MOSI on trailing edge of previous clock */
+ if (*data & 1)
+ {
+ SETMOSI;
+ }
+ else
+ {
+ CLRMOSI;
+ }
+ *data >>= 1;
+
+ if ((bit == 1) && !(flags & NOEND))
+ SETTMS; //TMS high on last bit to exit.
+
+ jtag_tcktock();
+
+ if ((bit == 1) && !(flags & NOEND))
+ jtag_state <<= 1; // Exit1-DR or Exit1-IR
+
+ /* read MISO on trailing edge */
+ if (READMISO)
+ {
+ *data |= (high);
+ }
+
+ }
+ hmask = (high<<1) - 1;
+ *data &= hmask;
+ }
+ else
+ {
+ // MSB... we need to start at the end of the byte array
+ data += (bitcount/8);
+ bitnum = bitcount % 8;
+ high = (1L << (min(bitnum,8) - 1));
+ mask = high - 1;
+ hmask = (high<<1) - 1;
+
+ for (bit = bitcount; bit > 0; bit--,bitnum--)
+ {
+ if (bitnum == 0)
+ {
+ *data &= hmask;
+
+ high = (1L << (min(bit,8) - 1));
+ mask = high - 1;
+ hmask = (high<<1) - 1;
+ bitnum = 8;
+ data --;
+ }
+
+ /* write MOSI on trailing edge of previous clock */
+ if (*data & high)
+ {
+ SETMOSI;
+ }
+ else
+ {
+ CLRMOSI;
+ }
+ *data = (*data & mask) << 1;
+
+ if ((bit==1) && !(flags & NOEND))
+ SETTMS; //TMS high on last bit to exit.
+
+ jtag_tcktock();
+
+ if ((bit == 1) && !(flags & NOEND))
+ jtag_state <<= 1; // Exit1-DR or Exit1-IR
+
+ /* read MISO on trailing edge */
+ *data |= (READMISO);
+
+ }
+ }
+
+ //This is needed for 20-bit MSP430 chips.
+ //Might break another 20-bit chip, if one exists.
+ //
+ //UGH... this needs to be fixed... doesn't work with char*
+/* if(bitcount==20){
+ *data = ((*data << 16) | (*data >> 4)) & 0x000FFFFF;
+ }*/
+
+ RESTORETCLK;
+
+ if (!(flags & NOEND))
+ {
+ // exit state
+ jtag_tcktock();
+
+ jtag_state <<= 3; // Update-DR or Update-IR
+
+ // update state
+ if (!(flags & NORETIDLE))
+ {
+ CLRTMS;
+ jtag_tcktock();
+
+ jtag_state = RUN_TEST_IDLE;
+ }
+ }
+
+ return &data[2];
+}
projects / goodfet / blobdiff