The code below uses the capture compare feature of TIM1 channel 3 to capture rising edge on PE10, but its not working, the interrupt handler its not called. I am not that good at this embedded stuff, so can somebody tell me if I am settings this correctly ?
#include "STM32/stm32f4xx_tim.h" void TIM1_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; /* TIM1 clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); /* GPIOA clock enable */ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE); /* TIM1 channel 3 pin (PE.10) configuration */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOE, &GPIO_InitStructure); /* Connect TIM pins to AF2 */ GPIO_PinAFConfig(GPIOE, GPIO_PinSource10, GPIO_AF_TIM1); /* Enable the TIM1 global Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_ICInitTypeDef TIM_ICInitStructure; TIM_ICInitStructure.TIM_Channel = TIM_Channel_3; TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; TIM_ICInitStructure.TIM_ICFilter = 0x0; TIM_ICInit(TIM1, &TIM_ICInitStructure); /* TIM enable counter */ TIM_Cmd(TIM1, ENABLE); /* Enable the CC3 Interrupt Request */ TIM_ITConfig(TIM1, TIM_IT_CC3, ENABLE); } void TIM1_CC_IRQHandler(void) { } int StartCapture() { TIM1_Config(); while(1); /* Infinite loop */ }