/**
  ******************************************************************************
  * @file    bsp_i2c.c
  * @author  fire
  * @version V1.0
  * @date    2019-xx-xx
  * @brief   I2C 配置文件
  ******************************************************************************
  * @attention
  *
  * 实验平台:野火 STM32 H750 开发板 
  * 论坛    :http://www.firebbs.cn
  * 淘宝    :http://firestm32.taobao.com
  *
  ******************************************************************************
  */

#include "./i2c/bsp_i2c.h"

I2C_HandleTypeDef  I2C_Handle; 

/**
  * @brief I2C MSP Initialization 
  *        This function configures the hardware resources used in this example: 
  *           - Peripheral's clock enable
  *           - Peripheral's GPIO Configuration  
  *           - DMA configuration for transmission request by peripheral 
  *           - NVIC configuration for DMA interrupt request enable
  * @param hi2c: I2C handle pointer
  * @retval None
  */
void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{  
  GPIO_InitTypeDef  GPIO_InitStruct;
  
  /*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* Enable GPIO TX/RX clock */
  I2Cx_SCL_GPIO_CLK_ENABLE();
  I2Cx_SDA_GPIO_CLK_ENABLE();
  /* Enable I2C1 clock */
  I2Cx_CLK_ENABLE(); 
  
  /*##-2- Configure peripheral GPIO ##########################################*/  
  /* I2C TX GPIO pin configuration  */
  GPIO_InitStruct.Pin       = I2Cx_SCL_PIN;
  GPIO_InitStruct.Mode      = GPIO_MODE_AF_OD;
  GPIO_InitStruct.Pull      = GPIO_NOPULL;
  GPIO_InitStruct.Speed     = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = I2Cx_SCL_AF;
  
  HAL_GPIO_Init(I2Cx_SCL_GPIO_PORT, &GPIO_InitStruct);
    
  /* I2C RX GPIO pin configuration  */
  GPIO_InitStruct.Pin = I2Cx_SDA_PIN;
  GPIO_InitStruct.Alternate = I2Cx_SDA_AF;
    
  HAL_GPIO_Init(I2Cx_SDA_GPIO_PORT, &GPIO_InitStruct);
  
  	/* Force the I2C peripheral clock reset */  
	I2Cx_FORCE_RESET() ; 

	/* Release the I2C peripheral clock reset */  
	I2Cx_RELEASE_RESET(); 
}


/**
  * @brief  I2C 工作模式配置
  * @param  无
  * @retval 无
  */
void I2C_Mode_Config(void)
{
  I2Cx_CLK_ENABLE();
  HAL_I2C_MspInit(&I2C_Handle);
  
  I2C_Handle.Instance             = I2Cx;
  
  I2C_Handle.Init.AddressingMode  = I2C_ADDRESSINGMODE_7BIT;
  I2C_Handle.Init.Timing           = 0x40604E73;//100KHz
  I2C_Handle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  I2C_Handle.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
  I2C_Handle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  I2C_Handle.Init.NoStretchMode   = I2C_NOSTRETCH_DISABLE;
  I2C_Handle.Init.OwnAddress1     = 0 ;
  I2C_Handle.Init.OwnAddress2     = 0; 
    /* Init the I2C */
  HAL_I2C_Init(&I2C_Handle);	

  HAL_I2CEx_AnalogFilter_Config(&I2C_Handle, I2C_ANALOGFILTER_ENABLE);    
}

/**
  * @brief  Manages error callback by re-initializing I2C.
  * @param  Addr: I2C Address
  * @retval None
  */
static void I2Cx_Error(uint8_t Addr)
{
	/* 恢复I2C寄存器为默认值 */
	HAL_I2C_DeInit(&I2C_Handle); 
	/* 重新初始化I2C外设 */
	I2C_Mode_Config();
}
/**
  * @brief  写寄存器，这是提供给上层的接口
	* @param  slave_addr: 从机地址
	* @param 	reg_addr:寄存器地址
	* @param len：写入的长度
	*	@param data_ptr:指向要写入的数据
  * @retval 正常为0，不正常为非0
  */
int Sensors_I2C_WriteRegister(unsigned char slave_addr,
                                        unsigned char reg_addr,
                                        unsigned short len, 
                                        unsigned char *data_ptr)
{
	HAL_StatusTypeDef status = HAL_OK;
	status = HAL_I2C_Mem_Write(&I2C_Handle, slave_addr, reg_addr, I2C_MEMADD_SIZE_8BIT,data_ptr, len,I2Cx_FLAG_TIMEOUT); 
	/* 检查通讯状态 */
	if(status != HAL_OK)
	{
		/* 总线出错处理 */
		I2Cx_Error(slave_addr);
	}
	while (HAL_I2C_GetState(&I2C_Handle) != HAL_I2C_STATE_READY)
	{
		
	}
	/* 检查SENSOR是否就绪进行下一次读写操作 */
	while (HAL_I2C_IsDeviceReady(&I2C_Handle, slave_addr, I2Cx_FLAG_TIMEOUT, I2Cx_FLAG_TIMEOUT) == HAL_TIMEOUT);
	/* 等待传输结束 */
	while (HAL_I2C_GetState(&I2C_Handle) != HAL_I2C_STATE_READY)
	{
		
	}
	return status;
}

/**
  * @brief  读寄存器，这是提供给上层的接口
	* @param  slave_addr: 从机地址
	* @param 	reg_addr:寄存器地址
	* @param len：要读取的长度
	*	@param data_ptr:指向要存储数据的指针
  * @retval 正常为0，不正常为非0
  */
int Sensors_I2C_ReadRegister(unsigned char slave_addr,
                                       unsigned char reg_addr,
                                       unsigned short len, 
                                       unsigned char *data_ptr)
{
	HAL_StatusTypeDef status = HAL_OK;
	status =HAL_I2C_Mem_Read(&I2C_Handle,slave_addr,reg_addr,I2C_MEMADD_SIZE_8BIT,data_ptr,len,I2Cx_FLAG_TIMEOUT);    
	/* 检查通讯状态 */
	if(status != HAL_OK)
	{
		/* 总线出错处理 */
		I2Cx_Error(slave_addr);
	}
	while (HAL_I2C_GetState(&I2C_Handle) != HAL_I2C_STATE_READY)
	{
		
	}
	/* 检查SENSOR是否就绪进行下一次读写操作 */
	while (HAL_I2C_IsDeviceReady(&I2C_Handle, slave_addr, I2Cx_FLAG_TIMEOUT, I2Cx_FLAG_TIMEOUT) == HAL_TIMEOUT);
	/* 等待传输结束 */
	while (HAL_I2C_GetState(&I2C_Handle) != HAL_I2C_STATE_READY)
	{
		
	}
	return status;
}

/*********************************************END OF FILE**********************/