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H743的 COMP1 使用不正常，在模拟电压输入 还没有达到REF时候，以上电运行会无缘无故进两次中断，， 手册这一章写的太简单了，用例程和 CuMX生成的 现象一样。有没有哪位大侠遇到过
初始化配置
void MX_COMP1_Init(void)
{
hcomp1.Instance = COMP1;
hcomp1.Init.InvertingInput = COMP_INPUT_MINUS_VREFINT;
hcomp1.Init.NonInvertingInput = COMP_INPUT_PLUS_IO1;
hcomp1.Init.OutputPol = COMP_OUTPUTPOL_NONINVERTED;
hcomp1.Init.Hysteresis = COMP_HYSTERESIS_HIGH;
hcomp1.Init.BlankingSrce = COMP_BLANKINGSRC_NONE;
hcomp1.Init.Mode = COMP_POWERMODE_HIGHSPEED;
hcomp1.Init.WindowMode = COMP_WINDOWMODE_DISABLE;
hcomp1.Init.TriggerMode = COMP_TRIGGERMODE_IT_FALLING;
if (HAL_COMP_Init(&hcomp1) != HAL_OK)
{
Error_Handler();
}
}
void HAL_COMP_MspInit(COMP_HandleTypeDef* compHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(compHandle->Instance==COMP1)
{
/* USER CODE BEGIN COMP1_MspInit 0 */
/* USER CODE END COMP1_MspInit 0 */
/* COMP1 clock enable */
__HAL_RCC_COMP12_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**COMP1 GPIO Configuration
PB0 ------> COMP1_INP
*/
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* COMP1 interrupt Init */
HAL_NVIC_SetPriority(COMP_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(COMP_IRQn);
/* USER CODE BEGIN COMP1_MspInit 1 */
/* USER CODE END COMP1_MspInit 1 */
}
}
主程序
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_COMP1_Init();
/* USER CODE BEGIN 2 */
if(HAL_COMP_Start_IT(&hcomp1) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
中断
/**
* @brief This function handles COMP1 and COMP2 interrupts through EXTI lines 20 and 21.
*/
void COMP_IRQHandler(void)
{
/* USER CODE BEGIN COMP_IRQn 0 */
/* USER CODE END COMP_IRQn 0 */
HAL_COMP_IRQHandler(&hcomp1);
/* USER CODE BEGIN COMP_IRQn 1 */
/* USER CODE END COMP_IRQn 1 */
}
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发表于 2020-9-10 13:45:33
发表于 2020-9-11 05:56:37
楼主
