2018年12月25日 | stm32使用PWM波中断的方式精确的控制波的个数

1，假如想要得到如下的波形：

每一个波的周期为25us，一组波的频率为10HZ

实现思路：

实现的时候使用TIM1的CH1和TIM2的CH1，使用TIM15的中断，每100个ms来一次中断，在中断服务函数中以中断的方式打开PWM波的输出，在输出一个PWM波之后会进入PWM的中断服务函数，在中断服务函数中计数PWM波的个数，当达到8个的时候关闭PWM波的中断输出。

中断优先级的安排：

TIM15   1    0

TIM1     2    0

TIM2     3    0

2,在CUBE中的配置

TIM15的配置：

TIM1的配置：

TIM2的配置：

3，代码实现

/**

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

  * File Name          : main.c

  * Description        : Main program body

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

  *

  * COPYRIGHT(c) 2017 STMicroelectronics

  *

  * Redistribution and use in source and binary forms, with or without modification,

  * are permitted provided that the following conditions are met:

  *   1. Redistributions of source code must retain the above copyright notice,

  *      this list of conditions and the following disclaimer.

  *   2. Redistributions in binary form must reproduce the above copyright notice,

  *      this list of conditions and the following disclaimer in the documentation

  *      and/or other materials provided with the distribution.

  *   3. Neither the name of STMicroelectronics nor the names of its contributors

  *      may be used to endorse or promote products derived from this software

  *      without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  *

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

  */

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

#include "main.h"

#include "stm32f0xx_hal.h"

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

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

TIM_HandleTypeDef htim1;

TIM_HandleTypeDef htim2;

TIM_HandleTypeDef htim15;

/* USER CODE BEGIN PV */

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

/* USER CODE END PV */

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

void SystemClock_Config(void);

void Error_Handler(void);

static void MX_GPIO_Init(void);

static void MX_TIM1_Init(void);

static void MX_TIM2_Init(void);

static void MX_TIM15_Init(void);                                    

void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);

/* USER CODE BEGIN PFP */

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

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

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();

  /* Configure the system clock */

  SystemClock_Config();

  /* Initialize all configured peripherals */

  MX_GPIO_Init();

  MX_TIM1_Init();

  MX_TIM2_Init();

  MX_TIM15_Init();

  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

  }

  /* USER CODE END 3 */

}

/** System Clock Configuration

*/

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct;

  RCC_ClkInitTypeDef RCC_ClkInitStruct;

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

    */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

  RCC_OscInitStruct.HSIState = RCC_HSI_ON;

  RCC_OscInitStruct.HSICalibrationValue = 16;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL12;

  RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

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

    */

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                              |RCC_CLOCKTYPE_PCLK1;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)

  {

    Error_Handler();

  }

    /**Configure the Systick interrupt time 

    */

  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

    /**Configure the Systick 

    */

  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  /* SysTick_IRQn interrupt configuration */

  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

}

/* TIM1 init function */

static void MX_TIM1_Init(void)

{

  TIM_MasterConfigTypeDef sMasterConfig;

  TIM_OC_InitTypeDef sConfigOC;

  TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;

  htim1.Instance = TIM1;

  htim1.Init.Prescaler = 48-1;

  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;

  htim1.Init.Period = 25-1;

  htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

  htim1.Init.RepetitionCounter = 0;

  htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

  if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)

  {

    Error_Handler();

  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;

  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

  if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)

  {

    Error_Handler();

  }

  sConfigOC.OCMode = TIM_OCMODE_PWM1;

  sConfigOC.Pulse = 12;

  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;

  sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;

  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

  sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;

  sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;

  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)

  {

    Error_Handler();

  }

  sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;

  sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;

  sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;

  sBreakDeadTimeConfig.DeadTime = 0;

  sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;

  sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;

  sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;

  if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)

  {

    Error_Handler();

  }

  HAL_TIM_MspPostInit(&htim1);

HAL_NVIC_SetPriority(TIM1_CC_IRQn, 2, 0);

  HAL_NVIC_EnableIRQ(TIM1_CC_IRQn);

}

/* TIM2 init function */

static void MX_TIM2_Init(void)

{

  TIM_MasterConfigTypeDef sMasterConfig;

  TIM_OC_InitTypeDef sConfigOC;

  htim2.Instance = TIM2;

  htim2.Init.Prescaler = 48-1;

  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;

  htim2.Init.Period = 25-1;

  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

  htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

  if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)

  {

    Error_Handler();

  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;

  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

  if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)

  {

    Error_Handler();

  }

  sConfigOC.OCMode = TIM_OCMODE_PWM1;

  sConfigOC.Pulse = 12;

  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;

  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

  if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)

  {

    Error_Handler();

  }

  HAL_TIM_MspPostInit(&htim2);

HAL_NVIC_SetPriority(TIM2_IRQn , 3, 0);

  HAL_NVIC_EnableIRQ(TIM2_IRQn );

}

/* TIM15 init function */

static void MX_TIM15_Init(void)

{

  TIM_ClockConfigTypeDef sClockSourceConfig;

  TIM_MasterConfigTypeDef sMasterConfig;

  htim15.Instance = TIM15;

  htim15.Init.Prescaler = 480-1;

  htim15.Init.CounterMode = TIM_COUNTERMODE_UP;

  htim15.Init.Period = 10000;//100ms

  htim15.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

  htim15.Init.RepetitionCounter = 0;

  htim15.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

  if (HAL_TIM_Base_Init(&htim15) != HAL_OK)

  {

    Error_Handler();

  }

  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;

  if (HAL_TIM_ConfigClockSource(&htim15, &sClockSourceConfig) != HAL_OK)

  {

    Error_Handler();

  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;

  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

  if (HAL_TIMEx_MasterConfigSynchronization(&htim15, &sMasterConfig) != HAL_OK)

  {

    Error_Handler();

  }

HAL_NVIC_SetPriority(TIM15_IRQn, 1, 0);

  HAL_NVIC_EnableIRQ(TIM15_IRQn);

  /*##-2- Start the TIM Base generation in interrupt mode ####################*/

  /* Start Channel1 */

  if (HAL_TIM_Base_Start_IT(&htim15) != HAL_OK)

  {

    /* Starting Error */

    Error_Handler();

  }

}

static uint8_t count1 = 0,count2 = 0;

void delay(uint16_t j)

{

while(j--);

}

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)

{

HAL_TIM_PWM_Start_IT(&htim2, TIM_CHANNEL_1);

delay(12);//12us

HAL_TIM_PWM_Start_IT(&htim1, TIM_CHANNEL_1);

while(count1 && count2);

}

void HAL_TIM_PWM_PulseFinishedCallback(TIM_HandleTypeDef *htim)

{

if(htim == &htim1)

{

if(count1 < 8)

{

count1++;

}

else

{

HAL_TIM_PWM_Stop_IT(&htim1, TIM_CHANNEL_1);

count1 = 0;

}

}

if(htim == &htim2)

{

if(count2 < 8)

{

count2++;

}

else

{

HAL_TIM_PWM_Stop_IT(&htim2, TIM_CHANNEL_1);

count2 = 0;

}

}

}

/** Configure pins as 

        * Analog 

        * Input 

        * Output

        * EVENT_OUT

        * EXTI

*/

static void MX_GPIO_Init(void)

{

  /* GPIO Ports Clock Enable */

  __HAL_RCC_GPIOF_CLK_ENABLE();

  __HAL_RCC_GPIOA_CLK_ENABLE();

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**

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

  * @param  None

  * @retval None

  */

void Error_Handler(void)

{

  /* USER CODE BEGIN Error_Handler */

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

  while(1) 

  {

  }

  /* USER CODE END Error_Handler */ 

}

#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

/**

  * @}

  */ 

/**

  * @}

*/ 

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/