[其他ST产品] STM32 HAL库定时器输入捕获SlaveMode脉宽测量

/* USER CODE BEGIN Header */

/**

  ******************************************************************************

  * [url=home.php?mod=space&uid=288409]@file[/url]           : main.c

  * [url=home.php?mod=space&uid=247401]@brief[/url]          : Main program body

  ******************************************************************************

  * @attention

  *

  * Copyright (c) 2023 STMicroelectronics.

  * All rights reserved.

  *

  * This software is licensed under terms that can be found in the LICENSE file

  * in the root directory of this software component.

  * If no LICENSE file comes with this software, it is provided AS-IS.

  *

  ******************************************************************************

  */

/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/

#include "main.h"

#include "tim.h"

#include "usart.h"

#include "gpio.h"



/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

#include "stdio.h"

#include "string.h"

/* USER CODE END Includes */



/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN PTD */



/* USER CODE END PTD */



/* Private define ------------------------------------------------------------*/

/* USER CODE BEGIN PD */



/* USER CODE END PD */



/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PM */



/* USER CODE END PM */



/* Private variables ---------------------------------------------------------*/



/* USER CODE BEGIN PV */



/* USER CODE END PV */



/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

/* USER CODE BEGIN PFP */



/* USER CODE END PFP */



/* Private user code ---------------------------------------------------------*/

/* USER CODE BEGIN 0 */



/* USER CODE END 0 */



/**

  * @brief  The application entry point.

  * @retval int

  */

int main(void)

{

    /* USER CODE BEGIN 1 */

    uint8_t USART_TX_Buff[32] = {0};

    uint32_t Duty, Duty_High, ARR, PWM_f;

    /* 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_TIM2_Init();

    MX_TIM3_Init();

    MX_USART1_UART_Init();

    /* USER CODE BEGIN 2 */

    HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1); //开启PWM输出通道:PA6

//                        TIM3->ARR = 1000-1;//自动重装载值

    TIM3->CCR1 = 300;//捕获/比较计数值，PWM占空比5000/1000=50% f=1MHz/1000=1KHz



    TIM2->PSC = 36 - 1; //预分频；f=2MHz

    HAL_TIM_IC_Start(&htim2, TIM_CHANNEL_1); //开启输入捕获上升沿：PA0

    HAL_TIM_IC_Start(&htim2, TIM_CHANNEL_2); //开启输入捕获下降沿:PA0

    /* USER CODE END 2 */



    /* Infinite loop */

    /* USER CODE BEGIN WHILE */

    while(1)

    {

        /* USER CODE END WHILE */



        /* USER CODE BEGIN 3 */

        HAL_Delay(1000);

        ARR = (TIM2->CCR1) + 1; //捕获从上一个上升沿开始到下一个上升沿结束的计数值，也就是一个完整周期的计数值

       // ARR = HAL_TIM_ReadCapturedValue(&htim2, TIM_CHANNEL_1) + 1;//同上

        Duty_High = (TIM2->CCR2) + 1; //捕获从上一个上升沿开始到下降沿之间的计数值，也就是高电平计数值

        //Duty_High = HAL_TIM_ReadCapturedValue(&htim2, TIM_CHANNEL_2) + 1;//同上

                                //f = f/psc=1000 000

                                //计一个数的时间T：1/f

                                //PWM_f  = ARR/f

        PWM_f = 2000/ARR;//KHz, 1/ARR*(T)= 1/ARR*(1/f)= f/ARR

        Duty = Duty_High * 100 / ARR;

        sprintf((char*)USART_TX_Buff, "PWM_f:%dKHz,ARR:%d,Duty_High:%d,Duty:%d%%", PWM_f, ARR, Duty_High, Duty); //打印输入捕获总计数值，高电平计数值

        printf("%s \n", USART_TX_Buff);

        memset((char*)USART_TX_Buff, '\0', strlen((char*)USART_TX_Buff)); //清空数组

    }

    /* USER CODE END 3 */

}



/**

  * @brief System Clock Configuration

  * @retval None

  */

void SystemClock_Config(void)

{

    RCC_OscInitTypeDef RCC_OscInitStruct = {0};

    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};



    /** Initializes the RCC Oscillators according to the specified parameters

    * in the RCC_OscInitTypeDef structure.

    */

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;

    RCC_OscInitStruct.HSEState = RCC_HSE_ON;

    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;

    RCC_OscInitStruct.HSIState = RCC_HSI_ON;

    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;

    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;

    if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

    {

        Error_Handler();

    }



    /** Initializes the CPU, AHB and APB buses clocks

    */

    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK

                                  | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;

    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;

    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;



    if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)

    {

        Error_Handler();

    }

}



/* USER CODE BEGIN 4 */



/* USER CODE END 4 */



/**

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

  * @retval None

  */

void Error_Handler(void)

{

    /* USER CODE BEGIN Error_Handler_Debug */

    /* User can add his own implementation to report the HAL error return state */

    __disable_irq();

    while(1)

    {

    }

    /* USER CODE END Error_Handler_Debug */

}



#ifdef  USE_FULL_ASSERT

/**

  * @brief  Reports the name of the source file and the source line number

  *         where the assert_param error has occurred.

  * @param  file: pointer to the source file name

  * @param  line: assert_param error line source number

  * @retval None

  */

void assert_failed(uint8_t* file, uint32_t line)

{

    /* USER CODE BEGIN 6 */

    /* User can add his own implementation to report the file name and line number,

       ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

    /* USER CODE END 6 */

}

#endif /* USE_FULL_ASSERT */

int main(void)

{

.........

HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1);        //启动输入捕获中断       

HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_2);        //启动输入捕获中断 

........

while(1)

{

        ......

}



/**

  * @brief 输入捕获回调函数

  * @retval None

  */

void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef* htim)

{

    if(htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)

    {

    }

    if(htim->Channel == HAL_TIM_ACTIVE_CHANNEL_2)

    {

                        ARR = HAL_TIM_ReadCapturedValue(&htim2, TIM_CHANNEL_1)+1;

                        Duty_High = HAL_TIM_ReadCapturedValue(&htim2, TIM_CHANNEL_2)+1;

//                        ARR = TIM2->CCR1 + 1; //捕获从上一个上升沿开始到下一个上升沿结束的计数值，也就是一个完整周期的计数值

//                                Duty_High = TIM2->CCR2 + 1; //捕获从上一个上升沿开始到下降沿之间的计数值，也就是高电平计数值

    }

    __HAL_TIM_CLEAR_IT(&htim2, TIM_IT_UPDATE);//清零中断标志位

}