/*
 * STM32F4 I2C硬件抽象层实现
 * 功能：实现STM32F4平台的I2C硬件抽象层
 * 依赖硬件：STM32F407VE
 * 跨平台适配点：通过硬件抽象层接口适配不同平台
 */

#include "hal.h"
#include "stm32f4xx_hal.h"

/* I2C句柄 */
static I2C_HandleTypeDef hi2c1;

/**
 * @brief  I2C初始化
 * @param  clock_speed: 时钟速度
 * @return hal_status_t: 操作结果
 * @note   初始化I2C硬件
 */
static hal_status_t stm32f4_i2c_init(hal_i2c_clock_speed_t clock_speed)
{
    hi2c1.Instance = I2C1;
    hi2c1.Init.ClockSpeed = clock_speed;
    hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
    hi2c1.Init.OwnAddress1 = 0;
    hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    hi2c1.Init.OwnAddress2 = 0;
    hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
    
    if (HAL_I2C_Init(&hi2c1) != HAL_OK) {
        return HAL_STATUS_ERROR;
    }
    
    return HAL_STATUS_OK;
}

/**
 * @brief  I2C反初始化
 * @return hal_status_t: 操作结果
 * @note   反初始化I2C硬件
 */
static hal_status_t stm32f4_i2c_deinit(void)
{
    if (HAL_I2C_DeInit(&hi2c1) != HAL_OK) {
        return HAL_STATUS_ERROR;
    }
    
    return HAL_STATUS_OK;
}

/**
 * @brief  I2C主模式发送数据
 * @param  dev_addr: 设备地址
 * @param  data: 数据指针
 * @param  len: 数据长度
 * @param  timeout: 超时时间
 * @return hal_status_t: 操作结果
 * @note   发送数据，使用阻塞方式
 */
static hal_status_t stm32f4_i2c_master_transmit(uint16_t dev_addr, const uint8_t *data, uint32_t len, uint32_t timeout)
{
    if (HAL_I2C_Master_Transmit(&hi2c1, dev_addr, (uint8_t *)data, len, timeout) != HAL_OK) {
        return HAL_STATUS_ERROR;
    }
    
    return HAL_STATUS_OK;
}

/**
 * @brief  I2C主模式接收数据
 * @param  dev_addr: 设备地址
 * @param  data: 数据指针
 * @param  len: 数据长度
 * @param  timeout: 超时时间
 * @return hal_status_t: 操作结果
 * @note   接收数据，使用阻塞方式
 */
static hal_status_t stm32f4_i2c_master_receive(uint16_t dev_addr, uint8_t *data, uint32_t len, uint32_t timeout)
{
    if (HAL_I2C_Master_Receive(&hi2c1, dev_addr, data, len, timeout) != HAL_OK) {
        return HAL_STATUS_ERROR;
    }
    
    return HAL_STATUS_OK;
}

/* I2C硬件抽象层操作结构体 */
const hal_i2c_ops_t stm32f4_i2c_ops = {
    .init = stm32f4_i2c_init,
    .deinit = stm32f4_i2c_deinit,
    .master_transmit = stm32f4_i2c_master_transmit,
    .master_receive = stm32f4_i2c_master_receive
};

/**
 * @brief  I2C MSP初始化
 * @param  i2cHandle: I2C句柄
 * @return 无
 * @note   初始化I2C的MSP
 */
void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    if(i2cHandle->Instance==I2C1)
    {
        /* I2C1 clock enable */
        __HAL_RCC_I2C1_CLK_ENABLE();
        __HAL_RCC_GPIOB_CLK_ENABLE();

        /**I2C1 GPIO Configuration
        PB6     ------> I2C1_SCL
        PB7     ------> I2C1_SDA
        */
        GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
        GPIO_InitStruct.Pull = GPIO_PULLUP;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
        GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
    }
}

/**
 * @brief  I2C MSP反初始化
 * @param  i2cHandle: I2C句柄
 * @return 无
 * @note   反初始化I2C的MSP
 */
void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
{
    if(i2cHandle->Instance==I2C1)
    {
        /* Peripheral clock disable */
        __HAL_RCC_I2C1_CLK_DISABLE();

        /**I2C1 GPIO Configuration
        PB6     ------> I2C1_SCL
        PB7     ------> I2C1_SDA
        */
        HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6|GPIO_PIN_7);
    }
}