How to start bootloader from application code

BHeiß.1 · ‎2021-01-22

I tried this code:

// BOOTLOADER starten -------------------------------------------------------------------------------------------

void (*SysMemBootJump)(void); // Funtkion Jump definieren

volatile uint32_t addr = 0x1FFF0000; // System Memory-Adresse für STM32G07 laden

HAL_RCC_DeInit(); // RCC auf Default setzen

SysTick->CTRL = 0; // Systick Timer zurücksetzen

SysTick->LOAD = 0; // ...

SysTick->VAL = 0; // ...

__disable_irq(); // Alle Interrupts sperren

HAL_UART_DeInit(handleuart); // UART ausschalten

__HAL_SYSCFG_REMAPMEMORY_SYSTEMFLASH(); // System Memory remappen

SysMemBootJump = (void (*)(void)) (*((uint32_t *)(addr + 4))); // Sprung-Adresse auf System Memory-Adresse setzen

__set_MSP(*(uint32_t *)addr); // Main Stack-Pointer setzen

SysMemBootJump(); // BOOTLOADER starten

while (1)

{

// Diese Schleife Sollte nie erreicht werden

}

This worked fine with the previous uses STM32F05. I just changed the adress of the bootloader (AN2606).

Can anybody help me?

Thanks

Uwe Bonnes · ‎2021-01-23

This question was asked a zillion times. Search here. In short, add code in your user programm at the very start before further initialization that scans for a signature and if that signature is found, jump to the bootloder. To get from running user program to the bootloader, set that signature and reset .

Piranha · ‎2021-01-23

As an example:

https://community.st.com/s/question/0D50X0000AFpTmUSQV/using-nvicsystemreset-in-bootloaderapplication-jumps

BHeiß.1 · ‎2021-02-02

Thank you for your response. There were several problems to solve. I did it with help of the ST support.

Best regards

Bernd