Issue with Running Application from Bootloader

[Pushpalatha]

I seek your assistance with an issue I'm encountering while attempting to jump from my bootloader to an application stored at a specific address in the flash memory of an STM32H723ZGT6TR microcontroller.

I am able to successfully flash the application binary from a USB to the flash memory using bootloader code. However, I am unable to run the application using the following code snippet:

 uint32_t msp_value = *(__IO uint32_t *)0x08040000;
__set_MSP(msp_value);
uint32_t resethandler_address = *(__IO uint32_t *) (0x08040000 + 4);
app_reset_handler = (void*) resethandler_address;
app_reset_handler();
NVIC_SystemReset();

I would appreciate your review and any  suggestions or corrections you might have. Thank you for your time and assistance.

[Imen.D]

Hello @Pushpalatha and welcome to the Community 🙂

Please have a look at these articles which will help you on how to Jump to bootloader from application:

• Jump to bootloader from application on STM32H7 dev... - STMicroelectronics Community
• How to jump to system bootloader from application ... - STMicroelectronics Community

[Pushpalatha]

When I flash the application code using STM32CubeIDE and then run the bootloader code, I am able to successfully jump to the application address and execute the application. However, when I attempt to flash the application code from within the bootloader itself, I encounter difficulties in running the application code afterward. I suspect the issue lies with the flash write process during the bootloader operation.

[SMarie]

Could you show us your process of how you write the flash in the bootloader?

[Pushpalatha]

void Flash_Write(uint32_t address, uint8_t *data, uint32_t length) {
    HAL_FLASH_Unlock();

    for (uint32_t i = 0; i < length; i += 8) {
        uint32_t data_word = *(uint32_t *)(data + i);
        if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_FLASHWORD, address + i, data_word) != HAL_OK) {
            Error_Handler();
        }
    }