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Speed up JTAG.

This commit is contained in:
Uwe Bonnes 2018-03-07 18:49:19 +01:00
parent 59e03dea27
commit 7a7266a0f7
2 changed files with 63 additions and 3 deletions
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60
src/platforms/stm32/jtagtap.c
View File

@ -66,3 +66,63 @@ inline uint8_t jtagtap_next(uint8_t dTMS, uint8_t dTDI)
return ret != 0;
}
void jtagtap_tms_seq(uint32_t MS, int ticks)
{
gpio_set_val(TDI_PORT, TDI_PIN, 1);
int data = MS & 1;
while(ticks) {
gpio_set_val(TMS_PORT, TMS_PIN, data);
gpio_set(TCK_PORT, TCK_PIN);
MS >>= 1;
data = MS & 1;
ticks--;
gpio_clear(TCK_PORT, TCK_PIN);
}
}
void
jtagtap_tdi_tdo_seq(uint8_t *DO, const uint8_t final_tms, const uint8_t *DI, int ticks)
{
uint8_t index = 1;
gpio_set_val(TMS_PORT, TMS_PIN, 0);
uint8_t res = 0;
while(ticks > 1) {
gpio_set_val(TDI_PORT, TDI_PIN, *DI & index);
gpio_set(TCK_PORT, TCK_PIN);
if (gpio_get(TDO_PORT, TDO_PIN)) {
res |= index;
}
if(!(index <<= 1)) {
*DO = res;
res = 0;
index = 1;
DI++; DO++;
}
ticks--;
gpio_clear(TCK_PORT, TCK_PIN);
}
gpio_set_val(TMS_PORT, TMS_PIN, final_tms);
gpio_set_val(TDI_PORT, TDI_PIN, *DI & index);
gpio_set(TCK_PORT, TCK_PIN);
if (gpio_get(TDO_PORT, TDO_PIN)) {
res |= index;
}
*DO = res;
gpio_clear(TCK_PORT, TCK_PIN);
}
void
jtagtap_tdi_seq(const uint8_t final_tms, const uint8_t *DI, int ticks)
{
uint8_t index = 1;
while(ticks--) {
gpio_set_val(TMS_PORT, TMS_PIN, ticks? 0 : final_tms);
gpio_set_val(TDI_PORT, TDI_PIN, *DI & index);
gpio_set(TCK_PORT, TCK_PIN);
if(!(index <<= 1)) {
index = 1;
DI++;
}
gpio_clear(TCK_PORT, TCK_PIN);
}
}

6
src/platforms/swlink/platform.c
View File

@ -57,11 +57,11 @@ void platform_init(void)
data |= AFIO_MAPR_SWJ_CFG_JTAG_OFF_SW_OFF;
AFIO_MAPR = data;
/* Setup JTAG GPIO ports */
gpio_set_mode(TMS_PORT, GPIO_MODE_OUTPUT_10_MHZ,
gpio_set_mode(TMS_PORT, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_INPUT_FLOAT, TMS_PIN);
gpio_set_mode(TCK_PORT, GPIO_MODE_OUTPUT_10_MHZ,
gpio_set_mode(TCK_PORT, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, TCK_PIN);
gpio_set_mode(TDI_PORT, GPIO_MODE_OUTPUT_10_MHZ,
gpio_set_mode(TDI_PORT, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, TDI_PIN);
gpio_set_mode(TDO_PORT, GPIO_MODE_INPUT,