stm32f429 TIM10_input_capture mode question

[Kang Sung Gu]

Posted on October 10, 2017 at 14:14

setting CC1IE:1 (TIM10->DIER)

capture is good, but not occur capture interrupt

why?

this is my sorce code

  volatile uint32_t temp2 =0;

  /*******GPIOG_Ouput_Init****************/  //RCC  RCC->AHB1ENR |= 0x00000001<<6;     //GPIOG CLK EN  //GPIOG  GPIOG->MODER  |= 0x00000001<<(2*14);//01:output mode (PORT14)  GPIOG->PUPDR  |= 0x00000000;       //00:no-pull_up, no-pull_down  GPIOG->OTYPER |= 0x00000000;       //0:PUSH-PULL  GPIOG->OSPEEDR|= 0x00000000;       //00:Low Speed    /*******TIM10_InputCapture Init*********/  //NVIC  NVIC->ISPR[0] |= 0x00000001<<25; //TIM10 position 25  //RCC  RCC->AHB1ENR  |= 0x00000001<<5;  //GPIOF CLK EN  temp2 = 0;  RCC->APB2ENR  |= 0x00000001<<17; //TIM10 CLK EN  //GPIOF AF  GPIOF->MODER  |= 0x00000002<<(2*6); //PF6 10: AF MODE  GPIOF->OTYPER |= 0x00000000;        //0:PUSH-PULL  GPIOF->OSPEEDR|= 0x00000000;        //00:Low Speed  GPIOF->PUPDR  |= 0x00000000;        //:no PU, no PD  GPIOF->AFR[0] |= 0x00000003<<(4*6); //0011:AF3(TIM10)  //TIM10  TIM10->CCMR1  |= 0x00000001; //CC1S: 01(configured as Input)  TIM10->CCMR1  |= 0x00000008; //IC1PSC: 10(capture is done once every 4 events)  TIM10->CCER   |= 0x0000000A; //CC1P: 1, CC1NP: 1 (11: both edges)  TIM10->CCER   |= 0x00000001; //CC1E: 1(Capture EN)  TIM10->DIER   |= 0x00000002; //CC1IE:1(CC1 interrupt EN)  TIM10->PSC    = 15999;       //Prescaler 16MHz/(15999 + 1) = 1clk = 1ms  TIM10->ARR    = 9999;        // 1ms * (9999+1), overflow is 10 sec  TIM10->CR1    |= 0x00000001; //CEN:  1(counter EN)  temp2 = 1;  /* USER CODE END 2 */

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/* USER CODE BEGIN 4 */

void TIM1_UP_TIM10_IRQHandler(void){  /* USER CODE BEGIN TIM1_UP_TIM10_IRQn 0 */  HAL_GPIO_TogglePin(GPIOG,GPIO_PIN_14);  /* USER CODE END TIM1_UP_TIM10_IRQn 0 */  //HAL_TIM_IRQHandler(&htim10);  TIM10->SR &= 0xFFFFFFFD; //CC1F : 0 reset  /* USER CODE BEGIN TIM1_UP_TIM10_IRQn 1 */

  /* USER CODE END TIM1_UP_TIM10_IRQn 1 */

}/* USER CODE END 4 */

[waclawek.jan]

Posted on October 10, 2017 at 14:42

TIM1_UP_TIM10_IRQHandler

As its name says, this is the handler for update interrupt, not the capture-compare interrupts - TIM1 has several separate interrupt vectors.

You want to use TIM1_CC_IRQHandler().

JW

[waclawek.jan]

Posted on October 11, 2017 at 08:15

Sorry, I've overlooked that it's TIM10 not TIM1...

Good catch. I tend to use the CMSIS functions for NVIC register manipulation (NVIC_SetPriority(), NVIC_EnableIRQ(), etc.) together with the xxxx_IRQn symbols.

JW

[Kang Sung Gu]

Posted on October 11, 2017 at 06:51

Thank you

My misstake is NVIC->ISPR[0] = 0x00000001<<25;   

I should have used ISER, but I used ISPR.