140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/*
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* STM32F4串口硬件抽象层实现
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* 功能：实现STM32F4平台的串口硬件抽象层
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* 依赖硬件：STM32F407VE
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* 跨平台适配点：通过硬件抽象层接口适配不同平台
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*/
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#include "hal.h"
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#include "stm32f4xx_hal.h"
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/* 串口句柄 */
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static UART_HandleTypeDef huart1;
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/**
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* @brief 串口初始化
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* @param baudrate: 波特率
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* @return hal_status_t: 操作结果
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* @note 初始化串口硬件
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*/
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static hal_status_t stm32f4_uart_init(hal_uart_baudrate_t baudrate)
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{
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huart1.Instance = USART1;
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huart1.Init.BaudRate = baudrate;
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huart1.Init.WordLength = UART_WORDLENGTH_8B;
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huart1.Init.StopBits = UART_STOPBITS_1;
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huart1.Init.Parity = UART_PARITY_NONE;
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huart1.Init.Mode = UART_MODE_TX_RX;
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huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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huart1.Init.OverSampling = UART_OVERSAMPLING_16;
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if (HAL_UART_Init(&huart1) != HAL_OK) {
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return HAL_STATUS_ERROR;
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}
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return HAL_STATUS_OK;
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}
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/**
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* @brief 串口反初始化
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* @return hal_status_t: 操作结果
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* @note 反初始化串口硬件
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*/
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static hal_status_t stm32f4_uart_deinit(void)
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{
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if (HAL_UART_DeInit(&huart1) != HAL_OK) {
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return HAL_STATUS_ERROR;
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}
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return HAL_STATUS_OK;
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}
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/**
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* @brief 串口发送数据
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* @param data: 数据指针
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* @param len: 数据长度
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* @return hal_status_t: 操作结果
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* @note 发送数据，使用阻塞方式
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*/
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static hal_status_t stm32f4_uart_send(const uint8_t *data, uint32_t len)
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{
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if (HAL_UART_Transmit(&huart1, (uint8_t *)data, len, 1000) != HAL_OK) {
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return HAL_STATUS_ERROR;
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}
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return HAL_STATUS_OK;
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}
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/**
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* @brief 串口接收数据
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* @param data: 数据指针
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* @param len: 数据长度
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* @param timeout: 超时时间
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* @return hal_status_t: 操作结果
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* @note 接收数据，使用阻塞方式
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*/
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static hal_status_t stm32f4_uart_recv(uint8_t *data, uint32_t len, uint32_t timeout)
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{
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if (HAL_UART_Receive(&huart1, data, len, timeout) != HAL_OK) {
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return HAL_STATUS_ERROR;
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}
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return HAL_STATUS_OK;
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}
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/* 串口硬件抽象层操作结构体 */
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const hal_uart_ops_t stm32f4_uart_ops = {
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.init = stm32f4_uart_init,
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.deinit = stm32f4_uart_deinit,
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.send = stm32f4_uart_send,
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.recv = stm32f4_uart_recv
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};
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/**
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* @brief UART MSP初始化
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* @param uartHandle: UART句柄
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* @return 无
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* @note 初始化UART的MSP
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*/
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void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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if(uartHandle->Instance==USART1)
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{
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/* USART1 clock enable */
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__HAL_RCC_USART1_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();
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/**USART1 GPIO Configuration
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PA9 ------> USART1_TX
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PA10 ------> USART1_RX
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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}
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}
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/**
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* @brief UART MSP反初始化
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* @param uartHandle: UART句柄
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* @return 无
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* @note 反初始化UART的MSP
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*/
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void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
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{
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if(uartHandle->Instance==USART1)
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{
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/* Peripheral clock disable */
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__HAL_RCC_USART1_CLK_DISABLE();
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/**USART1 GPIO Configuration
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PA9 ------> USART1_TX
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PA10 ------> USART1_RX
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*/
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HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);
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}
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} |