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STLINK: Allow to force bootloader by starting with the RESET button pressed

This commit is contained in:
Uwe Bonnes 2013-01-20 23:17:23 +01:00
parent 749fb318e7
commit 8033fb2529
1 changed files with 13 additions and 1 deletions
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14
src/platforms/stm32/usbdfu.c
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@ -55,6 +55,18 @@ u8 usbd_control_buffer[1024];
#if defined(DISCOVERY_STLINK) #if defined(DISCOVERY_STLINK)
u32 led2_state = 0; u32 led2_state = 0;
int stlink_test_nrst(void) {
/* Test if NRST is pulled down*/
int i;
uint16_t nrst;
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
gpio_set_mode(GPIOB, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_PULL_UPDOWN, GPIO0);
gpio_set(GPIOB, GPIO0);
for (i=0; i< 100000; i++)
nrst = gpio_get(GPIOB, GPIO0);
return (nrst)?1:0;
}
#endif #endif
static u32 max_address; static u32 max_address;
@ -366,7 +378,7 @@ int main(void)
{ {
#if defined (DISCOVERY_STLINK) #if defined (DISCOVERY_STLINK)
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN); rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
if(!gpio_get(GPIOC, GPIO13)) { if(!gpio_get(GPIOC, GPIO13) && stlink_test_nrst()) {
#elif defined (STM32_CAN) #elif defined (STM32_CAN)
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN); rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
if(!gpio_get(GPIOA, GPIO0)) { if(!gpio_get(GPIOA, GPIO0)) {