STM32 自学笔记 02

# GPIO#软件平台 STM32CubeIde#软件包 STM32Cube_FW_F0_V1.11.6#系统平台 Win7初始化void MX_GPIO_Init(void){GPIO_InitTypeDef GPIO_InitStruct {0};/* GPIO Ports Clock Enable */__HAL_RCC_GPIOC_CLK_ENABLE();__HAL_RCC_GPIOF_CLK_ENABLE();__HAL_RCC_GPIOA_CLK_ENABLE();__HAL_RCC_GPIOB_CLK_ENABLE();/*Configure GPIO pin Output Level */HAL_GPIO_WritePin(LED2_GPIO_Port, LED2_Pin, GPIO_PIN_RESET);/*Configure GPIO pin Output Level */HAL_GPIO_WritePin(GPIOB, LED3_Pin|LED1_Pin, GPIO_PIN_RESET);/*Configure GPIO pin : PtPin */GPIO_InitStruct.Pin LED2_Pin;GPIO_InitStruct.Mode GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull GPIO_NOPULL;GPIO_InitStruct.Speed GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(LED2_GPIO_Port, GPIO_InitStruct);/*Configure GPIO pins : PBPin PBPin */GPIO_InitStruct.Pin LED3_Pin|LED1_Pin;GPIO_InitStruct.Mode GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull GPIO_NOPULL;GPIO_InitStruct.Speed GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(GPIOB, GPIO_InitStruct);}有关Cubeide中的相关配置读者可自己设置遇到问题可自行解决HAL库参考手册STM32F072xB参考手册有关于HAL库各外设的相关函数、变量的定义读者可根据所学内容进行翻看本章重点学习内容①GPIO引脚输出控制②GPIO引脚电平状态获取③GPIO引脚翻转控制控制函数如下void HAL_GPIO_WritePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)GPIO_PinState HAL_GPIO_ReadPin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)void HAL_GPIO_TogglePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)以上函数源自 stm32f0xx_hal_gpio.c该文件包含8个函数功能实现读者可自行查阅---------------------------------------------------------------为了实现控制LED灯的闪烁控制如本章中控制LED1的闪烁其实是控制LED1所连接的PB1引脚电平变化从而实现了LED灯的闪烁代码如下/* USER CODE BEGIN Header *//********************************************************************************* file : main.c* brief : Main program body******************************************************************************* attention** Copyright (c) 2026 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 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 *//* 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();/* USER CODE BEGIN 2 *//* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE */HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_1);HAL_Delay(500);/* USER CODE BEGIN 3 */}/* 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.PLL.PLLState RCC_PLL_NONE;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_ClkInitStruct.SYSCLKSource RCC_SYSCLKSOURCE_HSE;RCC_ClkInitStruct.AHBCLKDivider RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(RCC_ClkInitStruct, FLASH_LATENCY_0) ! 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 */