Posted on May 06, 2018 at 22:51I need lock my firmware on the FLASH. But i need access to firmware from my bootloader. Also i need get any more function from own bootloader.
QUESTION:
When i set RDP level == 1 on stm32f103 all ok. FLASH in lock state and all cool.
But, when i try jumping to my application in RAM from own bootloader i get unknown bugs.. data on the RAM is damaged! =(
why?
ps. when RDP level is 0 - then all ok and work fine! Jump is correctly work and sub-programm in RAM work fine
my JUMP (
jump_addr is RAM offset - 0x2000....
:(
void Jump_Execute(uint32_t jump_addr = 0x20005800){
// prepare JUMP
uint32_t appJumpAddress = *((volatile uint32_t *)(jump_addr + 4));
void (*GoToApp)(void) = NULL;
__disable_irq();
// reset ALL and deInit
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_All);
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_All);
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_All);
HAL_GPIO_DeInit(GPIOD, GPIO_PIN_All);
HAL_RCC_DeInit();
__HAL_RCC_PWR_CLK_DISABLE();
__HAL_RCC_GPIOA_CLK_DISABLE();
__HAL_RCC_GPIOB_CLK_DISABLE();
__HAL_RCC_GPIOC_CLK_DISABLE();
__HAL_RCC_GPIOD_CLK_DISABLE();
RCC->CIR = 0x00000000;
HAL_DeInit();
NVIC_DeInit();
NVIC_SCBDeInit();
// reset systicktimer
SysTick->CTRL = 0;
SysTick->LOAD = 0;
SysTick->VAL = 0;
GoToApp = (void (*)(void)) appJumpAddress;
__DMB();
__set_MSP(*((volatile uint32_t *) jump_addr)); //stack pointer (to RAM) for USER app in this address
SCB->VTOR = jump_addr;
__DSB();
//** GO MAIN!
GoToApp();
//** does not jump =(
while (1){
}
}
#bootloader #crash-data #stm32f103
