一、配置

二、代码

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
uint8_t keyFalg = 0; // =1按键被按下
/* USER CODE END PD */

/* USER CODE BEGIN 4 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
  if(GPIO_Pin == KEY_Pin){
    keyFalg = 1;
  }
}
/* USER CODE END 4 */

  /* USER CODE BEGIN WHILE */
  while (1)
  {
    if(keyFalg == 1){
      HAL_Delay(20);
      if(HAL_GPIO_ReadPin(GPIOB,KEY_Pin) == GPIO_PIN_RESET){
        HAL_GPIO_TogglePin(GPIOC,LED_Pin);
        while(HAL_GPIO_ReadPin(GPIOB,KEY_Pin) == GPIO_PIN_RESET);
      }
      keyFalg = 0;
    }
    /* USER CODE END WHILE */