JumpToBootloader.c

/*
 * Jump to System Memory from User code
 * NOTE: Code tested on STM32F107
 */
 
#define SYSTEM_MEMORY_ADDRESS 0x1FFFB000
uint32_t JumpAddress;

/* Disable all peripheral clocks */
RCC->APB1ENR = 0x0;
RCC->APB2ENR = 0x0;

/* Disable all interrupts */
__disable_irq();
/* Clear Enable Interrupts */
NVIC->ICER[0] = (uint32_t) ~0ul;
NVIC->ICER[1] = (uint32_t) ~0ul;
NVIC->ICER[2] = (uint32_t) ~0ul;
/* Clear Pending Interrupts */
NVIC->ICPR[0] = (uint32_t) ~0ul;
NVIC->ICPR[1] = (uint32_t) ~0ul;
NVIC->ICPR[2] = (uint32_t) ~0ul;

/* Disable and reset System Timer */
/* AN2606 - Used to automatically detect the serial baud rate from the host
 * for USARTx bootloaders. */
SysTick->CTRL = 0x0;
SysTick->LOAD = 0x0;
SysTick->VAL = 0x0;

/* Reset the RCC clock configuration to the default reset state */
HAL_RCC_DeInit();

/* Load bootloader vector */
JumpAddress = *(__IO uint32_t*) (SYSTEM_MEMORY_ADDRESS + 4);
void (*JumpToBootloader)(void) = (void (*)(void)) JumpAddress;

/* Reinitialize the Stack pointer and jump to bootloader */
__set_MSP(*(__IO uint32_t*) SYSTEM_MEMORY_ADDRESS);
JumpToBootloader();