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swlink: Implement NRST.

This commit is contained in:
Uwe Bonnes 2018-09-22 14:46:32 +02:00 committed by Gareth McMullin
parent 1263d185a6
commit b744d8b0c9
2 changed files with 30 additions and 9 deletions
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35
src/platforms/swlink/platform.c
View File

@ -73,17 +73,18 @@ void platform_init(void)
gpio_set_mode(TDO_PORT, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_FLOAT, TDO_PIN);
if (rev == 1) {
switch (rev) {
case 0:
break;
case 1:
/* Enable MCO Out on PA8*/
RCC_CFGR &= ~(0xf << 24);
RCC_CFGR |= (RCC_CFGR_MCO_HSE << 24);
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO8);
break;
}
gpio_set(NRST_PORT,NRST_PIN);
gpio_set_mode(NRST_PORT, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_PULL_UPDOWN, NRST_PIN);
platform_srst_set_val(false);
gpio_set_mode(LED_PORT, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, LED_IDLE_RUN);
@ -109,8 +110,28 @@ void platform_init(void)
usbuart_init();
}
void platform_srst_set_val(bool assert) { (void)assert; }
bool platform_srst_get_val(void) { return false; }
void platform_srst_set_val(bool assert)
{
/* We reuse JSRST as SRST.*/
if (assert) {
gpio_set_mode(JRST_PORT, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_OPENDRAIN, JRST_PIN);
/* Wait until requested value is active.*/
while (gpio_get(JRST_PORT, JRST_PIN))
gpio_clear(JRST_PORT, JRST_PIN);
} else {
gpio_set_mode(JRST_PORT, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_PULL_UPDOWN, JRST_PIN);
/* Wait until requested value is active.*/
while (!gpio_get(JRST_PORT, JRST_PIN))
gpio_set(JRST_PORT, JRST_PIN);
}
}
bool platform_srst_get_val(void)
{
return gpio_get(JRST_PORT, JRST_PIN) == 0;
}
const char *platform_target_voltage(void)
{

4
src/platforms/swlink/platform.h
View File

@ -41,12 +41,12 @@
#define TCK_PORT GPIOA
#define TDI_PORT GPIOA
#define TDO_PORT GPIOB
#define NRST_PORT GPIOB
#define JRST_PORT GPIOB
#define TMS_PIN GPIO13
#define TCK_PIN GPIO14
#define TDI_PIN GPIO15
#define TDO_PIN GPIO3
#define NRST_PIN GPIO4
#define JRST_PIN GPIO4
#define SWDIO_PORT TMS_PORT
#define SWCLK_PORT TCK_PORT