Posted on August 26, 2017 at 02:37Hi,
recently I started my adventure with STM32F103C8T6. I had some experience with programming on other boards e.g STM32F3 Discovery but I came accross a problem with external interruptions. I am using EclipseStm as IDE, where my trouble making board was not defined as default (I have to do it myself). I have to point out that I did some research and i did not found any solution.
Also, I have to point out that I have no problems with other interruptions e.g TIMx and SysClock on this board.
Basing on my knowledge from Discovery board I have created this simple code:
&sharpinclude <stdbool.h>
&sharpinclude 'stm32f10x.h'
&sharpdefine DIOD GPIO_Pin_3
&sharpdefine INT GPIO_Pin_11
&sharpdefine INT_SRC GPIO_PinSource11
void init() {
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
//initializing blinking diod
GPIO_InitTypeDef GPIOinit;
GPIOinit.GPIO_Pin = DIOD;
GPIOinit.GPIO_Mode = GPIO_Mode_Out_PP;
GPIOinit.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOA, &GPIOinit);
//initializing input pin
GPIOinit.GPIO_Pin = INT;
GPIOinit.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIOinit);
//initializing exti
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, INT_SRC);
EXTI_InitTypeDef EXTIinit;
EXTIinit.EXTI_Line = EXTI_Line11;
EXTIinit.EXTI_LineCmd = ENABLE;
EXTIinit.EXTI_Mode = EXTI_Mode_Interrupt;
EXTIinit.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_Init(&EXTIinit);
//initializing handler
NVIC_EnableIRQ(EXTI15_10_IRQn);
NVIC_SetPriorityGrouping(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVICinit;
NVICinit.NVIC_IRQChannel = EXTI15_10_IRQn;
NVICinit.NVIC_IRQChannelCmd = ENABLE;
NVICinit.NVIC_IRQChannelPreemptionPriority=2;
NVICinit.NVIC_IRQChannelSubPriority=2;
NVIC_Init(&NVICinit);
}
void EXTI15_10_IRQHandler() {
static bool flag = false;
if(EXTI_GetITStatus(INT_SRC) != RESET) {
flag ? GPIO_SetBits(GPIOC, DIOD) : GPIO_ResetBits(GPIOC, DIOD);
flag = !flag;
}
EXTI_ClearITPendingBit(INT_SRC);
}
int main(void)
{
init();
while(1);
}
I have figured out that (in my case) there is no EXTI15_10_IRQHandler function call. I cannot find even its declaration while searching peripherial library files (in F3 board there is occurence).My question is there something wrong with my library that I do not have some functions? Or Maybe I am doing something wront with initialization? Can someone explain this strange behavoir?
#interrupts #stm32f103c8t6
