sys64738
/
blackmagic
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

libftdi/jtagtap: Clean up code.

This commit is contained in:
Uwe Bonnes 2018-04-28 14:11:50 +02:00
parent 7d45bd4869
commit c548e307fe
1 changed files with 1 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/platforms/libftdi/jtagtap.c
View File

@ -21,7 +21,6 @@
/* Low level JTAG implementation using FT2232 with libftdi.
*
* Issues:
* This code is old, rotten and unsupported.
* Should share interface with swdptap.c or at least clean up...
*/
@ -34,20 +33,8 @@
#include <ftdi.h>
#include "general.h"
#define PROVIDE_GENERIC_TAP_SEQ
//#define PROVIDE_GENERIC_TAP_TMS_SEQ
//#define PROVIDE_GENERIC_TAP_TDI_TDO_SEQ
//#define PROVIDE_GENERIC_TAP_TDI_SEQ
#include "jtagtap.h"
#define ALL_ZERO 0xA0
#define TCK 0x01
#define TDI 0x02
#define TDO 0x04
#define TMS 0x08
#define nSRST 0x20
int jtagtap_init(void)
{
assert(ftdic != NULL);
@ -66,24 +53,19 @@ void jtagtap_reset(void)
jtagtap_soft_reset();
}
#ifndef PROVIDE_GENERIC_TAP_TMS_SEQ
void
jtagtap_tms_seq(uint32_t MS, int ticks)
{
uint8_t tmp[3] = {MPSSE_WRITE_TMS | MPSSE_LSB | MPSSE_BITMODE| MPSSE_READ_NEG, 0, 0};
while(ticks >= 0) {
//jtagtap_next(MS & 1, 1);
tmp[1] = ticks<7?ticks-1:6;
tmp[2] = 0x80 | (MS & 0x7F);
// assert(ftdi_write_data(ftdic, tmp, 3) == 3);
platform_buffer_write(tmp, 3);
MS >>= 7; ticks -= 7;
}
}
#endif
#ifndef PROVIDE_GENERIC_TAP_TDI_SEQ
void
jtagtap_tdi_seq(const uint8_t final_tms, const uint8_t *DI, int ticks)
{
@ -116,12 +98,9 @@ jtagtap_tdi_seq(const uint8_t final_tms, const uint8_t *DI, int ticks)
tmp[index++] = 0;
tmp[index++] = (*DI)>>rticks?0x81:0x01;
}
// assert(ftdi_write_data(ftdic, tmp, index) == index);
platform_buffer_write(tmp, index);
}
#endif
#ifndef PROVIDE_GENERIC_TAP_TDI_TDO_SEQ
void
jtagtap_tdi_tdo_seq(uint8_t *DO, const uint8_t final_tms, const uint8_t *DI, int ticks)
{
@ -157,12 +136,9 @@ jtagtap_tdi_tdo_seq(uint8_t *DO, const uint8_t final_tms, const uint8_t *DI, int
tmp[index++] = 0;
tmp[index++] = (*DI)>>rticks?0x81:0x01;
}
// assert(ftdi_write_data(ftdic, tmp, index) == index);
platform_buffer_write(tmp, index);
// index = 0;
// while((index += ftdi_read_data(ftdic, tmp + index, rsize-index)) != rsize);
platform_buffer_read(tmp, rsize);
/*for(index = 0; index < rsize; index++)
/*for(int index = 0; index < rsize; index++)
printf("%02X ", tmp[index]);
printf("\n");*/
index = 0;
@ -184,15 +160,12 @@ jtagtap_tdi_tdo_seq(uint8_t *DO, const uint8_t final_tms, const uint8_t *DI, int
}
/*printf("%02X\n", *DO);*/
}
#endif
uint8_t jtagtap_next(uint8_t dTMS, uint8_t dTDI)
{
uint8_t ret;
uint8_t tmp[3] = {MPSSE_WRITE_TMS | MPSSE_DO_READ | MPSSE_LSB | MPSSE_BITMODE | MPSSE_WRITE_NEG, 0, 0};
tmp[2] = (dTDI?0x80:0) | (dTMS?0x01:0);
// assert(ftdi_write_data(ftdic, tmp, 3) == 3);
// while(ftdi_read_data(ftdic, &ret, 1) != 1);
platform_buffer_write(tmp, 3);
platform_buffer_read(&ret, 1);