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My interrupt is not working. Multiple interrupts.

Killstreet30
Associate III

Hi,

I wanted to code an application where the external interrupt would stop the motor. I am gonna be using two limit switches - one with rising edge trigger and one with falling edge trigger.

Unfortunately, none seem to work. Please help.

I have attached my code below:

#include "main.h"

#include "motor.h"

uint16_t isOpen = 1;

int main(void)

{

 /* USER CODE BEGIN 1 */

 /* USER CODE END 1 */

 /* MCU Configuration--------------------------------------------------------*/

 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

 HAL_Init();

 /* USER CODE BEGIN Init */

 /* USER CODE END Init */

 /* Configure the system clock */

 SystemClock_Config();

 /* USER CODE BEGIN SysInit */

 /* USER CODE END SysInit */

 /* Initialize all configured peripherals */

 MX_GPIO_Init();

 MX_USART2_UART_Init();

 MX_TIM2_Init();

 HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);

 HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);

 /* USER CODE BEGIN 2 */

 if (isOpen = 1){

   Start_Motor(2);

   }

 if (isOpen = 0){

   Start_Motor(1);

   }

while (1)

 {

  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

 }

 /* USER CODE END 3 */

}

static void MX_GPIO_Init(void)

{

 GPIO_InitTypeDef GPIO_InitStruct = {0};

 /* GPIO Ports Clock Enable */

 __HAL_RCC_GPIOC_CLK_ENABLE();

 __HAL_RCC_GPIOH_CLK_ENABLE();

 __HAL_RCC_GPIOA_CLK_ENABLE();

 __HAL_RCC_GPIOB_CLK_ENABLE();

 /*Configure GPIO pin Output Level */

 HAL_GPIO_WritePin(GPIOA, LD2_Pin|GPIO_PIN_7, GPIO_PIN_RESET);

 /*Configure GPIO pin : B1_Pin */

 GPIO_InitStruct.Pin = B1_Pin;

 GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;

 GPIO_InitStruct.Pull = GPIO_NOPULL;

 HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);

 /*Configure GPIO pins : LD2_Pin PA7 */

 GPIO_InitStruct.Pin = LD2_Pin|GPIO_PIN_7;

 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

 GPIO_InitStruct.Pull = GPIO_NOPULL;

 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

 /*Configure GPIO pin : PB11 */

 GPIO_InitStruct.Pin = GPIO_PIN_11;

 GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;

 GPIO_InitStruct.Pull = GPIO_NOPULL;

 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

 /*Configure GPIO pin : PA8 */

 GPIO_InitStruct.Pin = GPIO_PIN_8;

 GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;

 GPIO_InitStruct.Pull = GPIO_NOPULL;

 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

 /* EXTI interrupt init*/

 HAL_NVIC_SetPriority(EXTI9_5_IRQn, 0, 0);

 HAL_NVIC_EnableIRQ(EXTI9_5_IRQn);

 HAL_NVIC_SetPriority(EXTI15_10_IRQn, 0, 0);

 HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**

 * @brief This function is executed in case of error occurrence.

 * @retval None

 */

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){

 if(GPIO_Pin == GPIO_PIN_8){

  Stop_Motor();

 }

 if(GPIO_Pin == GPIO_PIN_11){

  Stop_Motor();

 }

}

2 REPLIES 2

Make sure the hardware connections work - disconnect the switches, set the two pins as GPIO outputs, toggle them and observe.

Read out and check relevant GPIO and EXTI registers. While interrupts disabled, observe that the status flags in EXTI change appropriately when the buyttons are pressed.

Subsequent generic interrupt debugging hints here.

JW

PS. Liking your own post won't give you any extra credit.

gbm
Lead II

There are many errors in your code which are signaled by the compiler as warnings. Look at them carefully and resolve them. Get back with questions when the code compiles without warnings.