HAL库学习04---定时器

1、硬件设备

STM32F103ZET3开发板
STLink

2、实现功能

基本定时器功能;
PWM功能;

3、定时器功能CubeMX配置

之前基础的配置如SYS、RCC、时钟数等不详细赘述。
这里的定时器选择TIM2,因为TIM1、TIM8是高级定时器,TIM2、3、4、5是通用定时器(基本定时、计数功能+实现输出比较、输入捕获、PWM生成),基本定时器是TIM6、7(基本定时、计数功能),时钟源一般选择为内部时钟、时钟频率设置为72-1MHz、count设置为1000-1
HAL库学习04---定时器_第1张图片

4、程序编写

加入定时器启动中断函数

HAL_TIM_Base_Start_IT(&htim2);

加入一个回调函数
以点亮一个小灯为例

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
	if(htim->Instance==TIM2)
	{
		HAL_GPIO_WritePin(GPIOB,GPIO_PIN_5,0);
	//HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_5);
	}
}

5、PWM功能CubeMX配置

PWM频率是你设置的Counter,PWM频率是1KHZ
HAL库学习04---定时器_第2张图片
示波器接PA0,示波器还是本科玩的东西,唉做了三年算法啥啥玩意都忘记了。
HAL库学习04---定时器_第3张图片

6、程序编写

初始化中加入定时器启动函数

  /* USER CODE BEGIN 2 */
HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_1);
  /* USER CODE END 2 */

设置PWM占空比

    /* USER CODE BEGIN 3 */
		__HAL_TIM_SET_COMPARE(&htim2,TIM_CHANNEL_1,500);
  }
  /* USER CODE END 3 */

这里补充一段可以PWM控制LED的小案例
main.c

/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "tim.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* 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 */
    uint16_t pwmVal=0;   //PWM占空比  
    uint8_t dir=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_TIM2_Init();
  /* USER CODE BEGIN 2 */
HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_1);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
		HAL_GPIO_WritePin(GPIOB,GPIO_PIN_5,GPIO_PIN_RESET);
//		HAL_GPIO_WritePin(GPIOE,GPIO_PIN_5,GPIO_PIN_RESET);
		
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		while(pwmVal<500)
		{
			pwmVal++;
			
		
		}
		__HAL_TIM_SET_COMPARE(&htim2,TIM_CHANNEL_1,pwmVal);
		HAL_Delay(1);
		while(pwmVal)
		{
			pwmVal--;
			__HAL_TIM_SET_COMPARE(&htim2,TIM_CHANNEL_1,pwmVal);
		HAL_Delay(1);
		}
		HAL_Delay(300);
  }
  /* 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 */

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