Posted on June 05, 2014 at 07:05
hi, all
I'm working on a IAP function with stm32f103cb.
Partition(IROM1 configuration):
part base size
bootloader:0x8000000 0xF800
user app: 0x800F800 0x10000
implementation:
bootloader: receive user app image from uart and write to P2, jump to P2 when finishing.
#define APPLICATION_ADDRESS (0x80000000+0xF800）
uint8_t jump_flag = 0;
int main(void)
{
RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
USART2_Configuration();
if(jump_flag)
{
if (((*(__IO uint32_t*)APPLICATION_ADDRESS) & 0x2FFE0000 ) == 0x20000000)
{
/* Jump to user application */
JumpAddress = *(__IO uint32_t*) (APPLICATION_ADDRESS + 4);
Jump_To_Application = (pFunction) JumpAddress;
/* Initialize user application's Stack Pointer */
__set_MSP(*(__IO uint32_t*) APPLICATION_ADDRESS);
uprint(''Jump_To_Application!'');
delay_ms(1);
Jump_To_Application();
}
}
user app: LED binking
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
// NVIC_SetVectorTable(NVIC_VectTab_FLASH,APPLICATION_ADDRESS);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource0);
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
int main(void)
{
RCC_Configuration();
//
NVIC_Configuration();
NVIC_SetVectorTable(NVIC_VectTab_FLASH,0xF800);
GPIO_Configuration();
USART2_Configuration();
uprintf(''LED blinking!'');
while(1)
{
delay_ms(1000);
GPIOC->ODR ^= GPIO_Pin_13;
}
}
issue：
the user app runs well if
NVIC_Configuration() orEXTI_Init(&EXTI_InitStructure); is commented.
but when uncommented it doesn't work.
It's hard to debug this part. I'm confused if I missed anything.
Any thoughts? Many thanks.
#stm32-iap-exti
