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Bootloader: always treat initial state as tainted. Firmware: mark boot state as tainted on boot. (#558)

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あく
2021-07-02 16:02:36 +03:00
committed by GitHub
parent df9a6673da
commit b6d5b5cb74
7 changed files with 39 additions and 20 deletions
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16
bootloader/targets/f6/target.c
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@@ -13,9 +13,9 @@
#include <api-hal.h>
// Boot request enum
#define BOOT_REQUEST_NONE 0x00000000
#define BOOT_REQUEST_TAINTED 0x00000000
#define BOOT_REQUEST_CLEAN 0xDADEDADE
#define BOOT_REQUEST_DFU 0xDF00B000
#define BOOT_REQUEST_TAINTED 0xDF00F000
// Boot to DFU pin
#define BOOT_DFU_PORT GPIOB
#define BOOT_DFU_PIN LL_GPIO_PIN_11
@@ -136,13 +136,13 @@ void target_init() {
}
int target_is_dfu_requested() {
if(LL_RTC_BAK_GetRegister(RTC, LL_RTC_BKP_DR0) == BOOT_REQUEST_DFU) {
return 1;
} else if(LL_RTC_BAK_GetRegister(RTC, LL_RTC_BKP_DR0) == BOOT_REQUEST_TAINTED) {
// We came here directly from STM bootloader and chip is unusable
// One more reset required to fix it
LL_RTC_BAK_SetRegister(RTC, LL_RTC_BKP_DR0, BOOT_REQUEST_NONE);
if(LL_RTC_BAK_GetRegister(RTC, LL_RTC_BKP_DR0) == BOOT_REQUEST_TAINTED) {
// Default system state is tainted
// We must ensure that MCU is cleanly booted
LL_RTC_BAK_SetRegister(RTC, LL_RTC_BKP_DR0, BOOT_REQUEST_CLEAN);
NVIC_SystemReset();
} else if(LL_RTC_BAK_GetRegister(RTC, LL_RTC_BKP_DR0) == BOOT_REQUEST_DFU) {
return 1;
}
LL_mDelay(100);
if(!LL_GPIO_IsInputPinSet(BOOT_DFU_PORT, BOOT_DFU_PIN)) {