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swlink: Handle force boot on bluepill.

This commit is contained in:
Uwe Bonnes 2018-09-22 15:28:46 +02:00 committed by Gareth McMullin
parent b744d8b0c9
commit 530d1e5c28
2 changed files with 30 additions and 15 deletions
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2
src/platforms/swlink/Makefile.inc
View File

@ -30,7 +30,7 @@ SRC += cdcacm.c \
all: blackmagic.bin blackmagic_dfu.bin blackmagic_dfu.hex
blackmagic_dfu: usbdfu.o dfucore.o dfu_f1.o
blackmagic_dfu: usbdfu.o dfucore.o dfu_f1.o platform_common.o
@echo " LD $@"
$(Q)$(CC) $^ -o $@ $(LDFLAGS_BOOT)

43
src/platforms/swlink/usbdfu.c
View File

@ -24,6 +24,7 @@
#include <libopencm3/cm3/scb.h>
#include "usbdfu.h"
#include "platform.h"
uint32_t app_address = 0x08002000;
@ -43,20 +44,34 @@ void dfu_detach(void)
int main(void)
{
/* Check the force bootloader pin*/
uint16_t pin_b;
rcc_periph_clock_enable(RCC_GPIOA);
rcc_periph_clock_enable(RCC_GPIOB);
/* Switch PB5 (SWIM_RST_IN) up */
gpio_set(GPIOB, GPIO5);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO5);
gpio_set(GPIOB, GPIO5);
pin_b = gpio_get(GPIOB, GPIO6);
/* Check state on PB6 ((SWIM_RST) and release PB5*/
pin_b = gpio_get(GPIOB, GPIO6);
gpio_set_mode(GPIOB, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_FLOAT, GPIO5);
if(((GPIOA_CRL & 0x40) == 0x40) && pin_b)
bool normal_boot = 0;
int rev = detect_rev();
switch (rev) {
case 0:
/* For Stlink on STM8S check that CN7 PIN 4 RESET# is
* forced to GND, Jumper CN7 PIN3/4 is plugged).
* Switch PB5 high. Read PB6 low means jumper plugged.
*/
gpio_set_mode(GPIOB, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_PULL_UPDOWN, GPIO6);
gpio_set(GPIOB, GPIO6);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO5);
while (gpio_get(GPIOB, GPIO5))
gpio_clear(GPIOB, GPIO5);
while (!gpio_get(GPIOB, GPIO5))
gpio_set(GPIOB, GPIO5);
normal_boot = (gpio_get(GPIOB, GPIO6));
break;
case 1:
/* Boot0/1 pins have 100k between Jumper and MCU
* and are jumperd to low by default.
* If we read PB2 high, force bootloader entry.*/
gpio_set_mode(GPIOB, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_FLOAT, GPIO2);
normal_boot = !(gpio_get(GPIOB, GPIO2));
}
if(((GPIOA_CRL & 0x40) == 0x40) && normal_boot)
dfu_jump_app_if_valid();
dfu_protect(DFU_MODE);