144 lines
3.8 KiB
C
144 lines
3.8 KiB
C
/*
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* STM32F4 I2C硬件抽象层实现
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* 功能：实现STM32F4平台的I2C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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/* I2C句柄 */
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static I2C_HandleTypeDef hi2c1;
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/**
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* @brief I2C初始化
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* @param clock_speed: 时钟速度
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* @return hal_status_t: 操作结果
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* @note 初始化I2C硬件
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*/
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static hal_status_t stm32f4_i2c_init(hal_i2c_clock_speed_t clock_speed)
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{
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hi2c1.Instance = I2C1;
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hi2c1.Init.ClockSpeed = clock_speed;
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hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
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hi2c1.Init.OwnAddress1 = 0;
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hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
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hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
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hi2c1.Init.OwnAddress2 = 0;
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hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
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hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
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if (HAL_I2C_Init(&hi2c1) != 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 I2C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I2C硬件
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*/
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static hal_status_t stm32f4_i2c_deinit(void)
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{
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if (HAL_I2C_DeInit(&hi2c1) != 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 I2C主模式发送数据
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* @param dev_addr: 设备地址
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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 发送数据，使用阻塞方式
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*/
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static hal_status_t stm32f4_i2c_master_transmit(uint16_t dev_addr, const uint8_t *data, uint32_t len, uint32_t timeout)
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{
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if (HAL_I2C_Master_Transmit(&hi2c1, dev_addr, (uint8_t *)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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/**
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* @brief I2C主模式接收数据
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* @param dev_addr: 设备地址
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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_i2c_master_receive(uint16_t dev_addr, uint8_t *data, uint32_t len, uint32_t timeout)
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{
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if (HAL_I2C_Master_Receive(&hi2c1, dev_addr, 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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/* I2C硬件抽象层操作结构体 */
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const hal_i2c_ops_t stm32f4_i2c_ops = {
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.init = stm32f4_i2c_init,
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.deinit = stm32f4_i2c_deinit,
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.master_transmit = stm32f4_i2c_master_transmit,
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.master_receive = stm32f4_i2c_master_receive
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};
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/**
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* @brief I2C MSP初始化
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* @param i2cHandle: I2C句柄
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* @return 无
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* @note 初始化I2C的MSP
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*/
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void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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if(i2cHandle->Instance==I2C1)
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{
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/* I2C1 clock enable */
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__HAL_RCC_I2C1_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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/**I2C1 GPIO Configuration
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PB6 ------> I2C1_SCL
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PB7 ------> I2C1_SDA
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
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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_AF4_I2C1;
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HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
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}
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}
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/**
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* @brief I2C MSP反初始化
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* @param i2cHandle: I2C句柄
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* @return 无
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* @note 反初始化I2C的MSP
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*/
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void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
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{
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if(i2cHandle->Instance==I2C1)
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{
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/* Peripheral clock disable */
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__HAL_RCC_I2C1_CLK_DISABLE();
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/**I2C1 GPIO Configuration
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PB6 ------> I2C1_SCL
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PB7 ------> I2C1_SDA
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*/
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HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6|GPIO_PIN_7);
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}
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} |