When I flash this code into stm32L4A6RGT6, and pressed the button, stm32 is getting stuck in line 56 inside the function HAL_FLASH_OB_Launch() . And once again try to flash to same board, its not flashing and saying that "Break at address "0x1fff06f6" with no debug information available, or outside of program code".
And if I flash any other firmware to the same board, intially it works, when we press restart button its getting stuck.
#include "main.h"
#include "stdbool.h"
typedef enum {
NONE,
PREPARATION,
FLASH_ERASING,
FLASH_ERASE_DONE,
FLASH_WRITE_IN_PROGRESS,
FLASH_WRITE_DONE,
UPDATE_DONE,
} updateState_t;
#define NUM_PAGES 100
#define NUM_BYTES NUM_PAGES * FLASH_PAGE_SIZE
#define NUM_DOUBLEWORDS NUM_BYTES / 8
volatile updateState_t updateState = NONE;
void HAL_GPIO_EXTI_Callback(uint16_t pin) {
if (pin == GPIO_PIN_2) {
printf("Button is pressed");
if (updateState == NONE) {
updateState = PREPARATION;
}
}
void HAL_FLASH_EndOfOperationCallback(uint32_t ReturnValue) {
if (updateState == FLASH_ERASING && ReturnValue==0xffffffff) {
updateState = FLASH_ERASE_DONE;
} else if (updateState == FLASH_WRITE_IN_PROGRESS) {
updateState = FLASH_WRITE_DONE;
}
}
void toggleBankAndReset() {
FLASH_OBProgramInitTypeDef OBInit;
HAL_FLASH_Unlock();
__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_OPTVERR);
HAL_FLASH_OB_Unlock();
HAL_FLASHEx_OBGetConfig(&OBInit);
OBInit.OptionType = OPTIONBYTE_USER;
OBInit.USERType = OB_USER_BFB2;
if (((OBInit.USERConfig) & (OB_BFB2_ENABLE)) == OB_BFB2_ENABLE) {
OBInit.USERConfig = OB_BFB2_DISABLE;
} else {
OBInit.USERConfig = OB_BFB2_ENABLE;
}
if (HAL_FLASHEx_OBProgram(&OBInit) != HAL_OK) {
// uint32_t errorCode = HAL_FLASH_GetError();
while (1) {
printf("1s delay is running::OB Program ");
HAL_Delay(1000);
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
}
}
if (HAL_FLASH_OB_Launch() != HAL_OK) {
//uint32_t errorCode = HAL_FLASH_GetError();
while (1) {
printf("0.1s delay is running::OB launch ");
HAL_Delay(100);
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
}
}
HAL_FLASH_OB_Lock();
HAL_FLASH_Lock();
}
uint8_t getActiveBank() {
volatile uint32_t remap = READ_BIT(SYSCFG->MEMRMP, 0x1 << 8);
return remap == 0 ? 1 : 2;
}
}
int main(void)
{
uint8_t bank = getActiveBank();
uint32_t last = HAL_GetTick();
uint32_t delay;
if (bank == 1) {
printf("delay: 1000, when bank==1");
delay = 1000;
} else {
printf("delay: 500, else");
delay = 500;
}
while (1) {
uint32_t now = HAL_GetTick();
if (now - last > delay) {
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
last = now;
}
switch (updateState) {
case NONE:
break;
case PREPARATION: {
FLASH_EraseInitTypeDef erase = { 0 };
erase.TypeErase = FLASH_TYPEERASE_PAGES;
erase.Banks = bank == 1 ? FLASH_BANK_2 : FLASH_BANK_1;
erase.NbPages = NUM_PAGES;
erase.Page = 0;
HAL_FLASH_Unlock();
HAL_StatusTypeDef status = HAL_FLASHEx_Erase_IT(&erase);
if (status != HAL_OK) {
// TODO error case
}
updateState = FLASH_ERASING;
}
break;
case FLASH_ERASING:
case FLASH_WRITE_IN_PROGRESS:
delay = 200;
// updateState = FLASH_ERASE_DONE;
break;
case FLASH_ERASE_DONE:
case FLASH_WRITE_DONE: {
delay = 50;
static size_t index = 0;
uint32_t dest = 0x08010000;
uint8_t *src = (uint8_t*) 0x08000000;
if (index < NUM_DOUBLEWORDS) {
uint64_t doubleword = *(uint64_t*) (src + (index * 8));
updateState = FLASH_WRITE_IN_PROGRESS;
HAL_StatusTypeDef progStatus;
progStatus= HAL_FLASH_Program_IT(
FLASH_TYPEPROGRAM_DOUBLEWORD, dest + index * 8, doubleword);
if (progStatus == HAL_OK)
index++;
} else {
updateState = UPDATE_DONE;
}
}
break;
case UPDATE_DONE:
toggleBankAndReset();
break;
}
}
}
HAL_StatusTypeDef HAL_FLASH_OB_Launch(void)
{
/* Set the bit to force the option byte reloading */
SET_BIT(FLASH->CR, FLASH_CR_OBL_LAUNCH);
/* Wait for last operation to be completed */
return(FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE));
}
