这里用到了STM32CubeMx,用定时器控制LED灯1秒闪烁。
单片机源程序如下:
- /* Includes ------------------------------------------------------------------*/
- #include "main.h"
- #include "stm32f1xx_hal.h"
- /* USER CODE BEGIN Includes */
- /* USER CODE END Includes */
- /* Private variables ---------------------------------------------------------*/
- TIM_HandleTypeDef htim1;
- /* USER CODE BEGIN PV */
- /* Private variables ---------------------------------------------------------*/
- /* USER CODE END PV */
- /* Private function prototypes -----------------------------------------------*/
- void SystemClock_Config(void);
- static void MX_GPIO_Init(void);
- static void MX_TIM1_Init(void);
- /* USER CODE BEGIN PFP */
- /* Private function prototypes -----------------------------------------------*/
- /* USER CODE END PFP */
- /* USER CODE BEGIN 0 */
- /* USER CODE END 0 */
- /**
- * @brief The application entry point.
- *
- * @retval None
- */
-
- //定时器中断
- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
- {
- if (htim->Instance == TIM1)
- {
- /* Toggle LED */
- HAL_GPIO_TogglePin(LED1_GPIO_Port,LED1_Pin);//定时时间到后,LED1翻转
- }
- }
-
- 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_TIM1_Init();
-
- HAL_TIM_Base_Start_IT(&htim1);
- /* USER CODE BEGIN 2 */
-
- /* USER CODE END 2 */
- /* Infinite loop */
- /* USER CODE BEGIN WHILE */
- while (1)
- {
- // HAL_GPIO_TogglePin(GPIOC,GPIO_PIN_13);
- // HAL_Delay(500);
- // HAL_GPIO_TogglePin(GPIOC,GPIO_PIN_13);
- // HAL_Delay(1000);
- /* USER CODE END WHILE */
- /* USER CODE BEGIN 3 */
- }
- /* USER CODE END 3 */
- }
- /**
- * @brief System Clock Configuration
- * @retval None
- */
- 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_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(__FILE__, __LINE__);
- }
- /**Initializes the CPU, AHB and APB busses 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(__FILE__, __LINE__);
- }
- /**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_ClockConfigTypeDef sClockSourceConfig;
- TIM_MasterConfigTypeDef sMasterConfig;
- htim1.Instance = TIM1;
- htim1.Init.Prescaler = 36000-1; //预分频系数 APB2当前频率为72MHz,我们希望每秒钟发生1次中断
- htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
- htim1.Init.Period = 2000-1; //自动重载值为1000-1 72,000,000/36000/2000=1Hz
- htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
- htim1.Init.RepetitionCounter = 0;
- htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
- if (HAL_TIM_Base_Init(&htim1) != HAL_OK)
- {
- _Error_Handler(__FILE__, __LINE__);
- }
- sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
- if (HAL_TIM_ConfigClockSource(&htim1, &sClockSourceConfig) != HAL_OK)
- {
- _Error_Handler(__FILE__, __LINE__);
- }
- sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
- sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
- if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
- {
- _Error_Handler(__FILE__, __LINE__);
- }
- }
- /** Configure pins as
- * Analog
- * Input
- * Output
- * EVENT_OUT
- * EXTI
- */
- static void MX_GPIO_Init(void)
- {
- GPIO_InitTypeDef GPIO_InitStruct;
- /* GPIO Ports Clock Enable */
- __HAL_RCC_GPIOC_CLK_ENABLE();
- __HAL_RCC_GPIOD_CLK_ENABLE();
- /*Configure GPIO pin Output Level */
- HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_SET);
- /*Configure GPIO pin : LED1_Pin */
- GPIO_InitStruct.Pin = LED1_Pin; //选择对应的LED管脚
- GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; //输出模式
- GPIO_InitStruct.Pull = GPIO_NOPULL;
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
- HAL_GPIO_Init(LED1_GPIO_Port, &GPIO_InitStruct);
- }
- /* USER CODE BEGIN 4 */
- /* USER CODE END 4 */
- /**
- * @brief This function is executed in case of error occurrence.
- * @param file: The file name as string.
- * @param line: The line in file as a number.
- * @retval None
- */
- void _Error_Handler(char *file, int line)
- {
- /* USER CODE BEGIN Error_Handler_Debug */
- /* User can add his own implementation to report the HAL error return state */
- 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,
- tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
- /* USER CODE END 6 */
- }
- #endif /* USE_FULL_ASSERT */
- /**
- * @}
- */
- /**
- * @}
- */
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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所有资料51hei提供下载:
HAL库的LED.7z
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