STM32H750XB_RT-THREAD/45-DCMI—OV2640摄像头实验/User/i2c/bsp_i2c.c

/**
  ******************************************************************************
  * @file    i2c.c
  * @author  fire
  * @version V1.0
  * @date    2015-xx-xx
  * @brief   i2c <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>I2C<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨѶ<EFBFBD><EFBFBD>
  ******************************************************************************
  * @attention
  *
  * ʵ<EFBFBD><EFBFBD>ƽ̨:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>  STM32 H743 <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
  * <EFBFBD><EFBFBD>̳    :http://www.firebbs.cn
  * <EFBFBD>Ա<EFBFBD>    :http://firestm32.taobao.com
  *
  ******************************************************************************
  */ 
#include "./i2c/bsp_i2c.h"

  
I2C_HandleTypeDef I2C_Handle;					
/*******************************  Function ************************************/

/**
  * @brief  <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>I2C<EFBFBD><EFBFBD><EFBFBD>ߣ<EFBFBD>ʹ<EFBFBD><EFBFBD>I2Cǰ<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
  * @param  <EFBFBD><EFBFBD>
  * @retval <EFBFBD><EFBFBD>
  */
void I2CMaster_Init(void) 
{
	GPIO_InitTypeDef GPIO_InitStructure;

	/* ʹ<><CAB9>I2Cxʱ<78><CAB1> */
	SENSORS_I2C_RCC_CLK_ENABLE();

	/* ʹ<><CAB9>I2C GPIO ʱ<><CAB1> */
	SENSORS_I2C_SCL_GPIO_CLK_ENABLE();
	SENSORS_I2C_SDA_GPIO_CLK_ENABLE();

	/* <20><><EFBFBD><EFBFBD>I2Cx<43><78><EFBFBD><EFBFBD>: SCL ----------------------------------------*/
	GPIO_InitStructure.Pin =  SENSORS_I2C_SCL_GPIO_PIN; 
	GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
	GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
	GPIO_InitStructure.Pull= GPIO_NOPULL;
	GPIO_InitStructure.Alternate=SENSORS_I2C_AF; 
	HAL_GPIO_Init(SENSORS_I2C_SCL_GPIO_PORT, &GPIO_InitStructure);

	/* <20><><EFBFBD><EFBFBD>I2Cx<43><78><EFBFBD><EFBFBD>: SDA ----------------------------------------*/
	GPIO_InitStructure.Pin = SENSORS_I2C_SDA_GPIO_PIN;  
	HAL_GPIO_Init(SENSORS_I2C_SDA_GPIO_PORT, &GPIO_InitStructure); 
	
	if(HAL_I2C_GetState(&I2C_Handle) == HAL_I2C_STATE_RESET)
	{	
		/* ǿ<>Ƹ<EFBFBD>λI2C<32><43><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1> */  
		SENSORS_I2C_FORCE_RESET(); 

		/* <20>ͷ<EFBFBD>I2C<32><43><EFBFBD><EFBFBD>ʱ<EFBFBD>Ӹ<EFBFBD>λ */  
		SENSORS_I2C_RELEASE_RESET(); 
		
		/* I2C <20><><EFBFBD><EFBFBD> */
		I2C_Handle.Instance = SENSORS_I2C;
		I2C_Handle.Init.Timing           = 0x40604E73;//100KHz
		I2C_Handle.Init.OwnAddress1      = 0;
		I2C_Handle.Init.AddressingMode   = I2C_ADDRESSINGMODE_7BIT;
		I2C_Handle.Init.DualAddressMode  = I2C_DUALADDRESS_DISABLE;
		I2C_Handle.Init.OwnAddress2      = 0;
		I2C_Handle.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
		I2C_Handle.Init.GeneralCallMode  = I2C_GENERALCALL_DISABLE;
		I2C_Handle.Init.NoStretchMode    = I2C_NOSTRETCH_DISABLE;

		/* <20><>ʼ<EFBFBD><CABC>I2C */
		HAL_I2C_Init(&I2C_Handle);	
		/* ʹ<><CAB9>ģ<EFBFBD><C4A3><EFBFBD>˲<EFBFBD><CBB2><EFBFBD> */
		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(void)
{
	/* <20>ָ<EFBFBD>I2C<32>Ĵ<EFBFBD><C4B4><EFBFBD>ΪĬ<CEAA><C4AC>ֵ */
	HAL_I2C_DeInit(&I2C_Handle); 
	/* <20><><EFBFBD>³<EFBFBD>ʼ<EFBFBD><CABC>I2C<32><43><EFBFBD><EFBFBD> */
	I2CMaster_Init();
}
/**
  * @brief  дһ<EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>OV2640<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>
  * @param  Addr: OV2640 <EFBFBD>ļĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
  * @param  Data: Ҫд<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
  * @retval <EFBFBD><EFBFBD><EFBFBD><EFBFBD>0<EFBFBD><EFBFBD>ʾд<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>0xFF<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
  */
uint8_t OV2640_WriteReg(uint16_t Addr, uint8_t Data)
{
//    I2Cx_WriteMultiple(&I2C_Handle, OV2640_DEVICE_WRITE_ADDRESS, (uint16_t)Addr, I2C_MEMADD_SIZE_8BIT,(uint8_t*)&Data, 1);
  HAL_StatusTypeDef status = HAL_OK;
  
  status = HAL_I2C_Mem_Write(&I2C_Handle, OV2640_DEVICE_ADDRESS, (uint16_t)Addr, I2C_MEMADD_SIZE_8BIT, (uint8_t*)&Data, 1, 1000);
  
  /* Check the communication status */
  if(status != HAL_OK)
  {
    /* Re-Initiaize the I2C Bus */
    I2Cx_Error();
  }
  return status;
}

/**
  * @brief  <EFBFBD><EFBFBD>OV2640<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>ȡһ<EFBFBD><EFBFBD><EFBFBD>ֽڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
  * @param  Addr: <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
  * @retval <EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>ȡ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
  */
uint8_t OV2640_ReadReg(uint16_t Addr)
{
    uint8_t Data = 0;
//    I2Cx_ReadMultiple(&I2C_Handle, OV2640_DEVICE_READ_ADDRESS, Addr, I2C_MEMADD_SIZE_8BIT, (uint8_t*)&Data, 1);
    
  HAL_StatusTypeDef status = HAL_OK;

  status = HAL_I2C_Mem_Read(&I2C_Handle, OV2640_DEVICE_ADDRESS, (uint16_t)Addr, I2C_MEMADD_SIZE_8BIT, (uint8_t*)&Data, 1, 1000);

  /* Check the communication status */
  if(status != HAL_OK)
  {
    /* I2C error occurred */
    I2Cx_Error();
  }
  /* return the read data */
    return Data;
}