#include "i2c_if.h"
static DevHandle myi2cHand = NULL;
myi2cHand = I2cOpen(1); //正确

//关闭
I2cClose(myi2cHand);
myi2cHand = NULL;
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typedef struct
{
    uint16_t addr;	//I2C设备地址
    uint8_t *buf;	//数据地址
    uint16_t len;	//数据长度
    uint16_t flags;	//I2C模式

} My_IIC_Msg;
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int MyIICWrite(uint32_t addr, uint8_t *data, uint32_t len)
{
    My_IIC_Msg msg[1];
    (void)memset_s(msg, sizeof(msg), 0, sizeof(msg));
    msg[0].addr = addr;
    msg[0].buf = data;
    msg[0].len = len;
    msg[0].flags = 0;	//写入模式
//验证I2C是否开启
    if (myi2cHand == NULL)
    {
        HDF_LOGE("I2C didn't open!");
        return 11;
    }
//I2C操作函数，并验证是否成功
    if (I2cTransfer(myi2cHand, (struct I2cMsg *)msg, 1) != 1)	
    {
        HDF_LOGE("i2c write failed");
        return 12;
    }
    return 1;
}
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int MyIICRead(uint32_t addr, uint8_t *data, uint32_t len)
{
    My_IIC_Msg msg;
    msg.addr = addr;
    msg.buf = data;
    msg.len = len;
    msg.flags = 1;	//读取模式
//验证I2C是否开启
    if (myi2cHand == NULL)
    {
        HDF_LOGE("I2C didn't open!");
        return 11;
    }
//I2C操作函数，并验证是否成功
    if (I2cTransfer(myi2cHand, (struct I2cMsg *)&msg, 1) != 1)	//注意参数二是要取地址
    {
        HDF_LOGE("i2c write failed");
        return 12;
    }
    return 1;
}
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int MyIICWriteRead(uint32_t addr,uint8_t* wdata,uint32_t wlen,uint8_t* rdata,uint32_t rlen)
{
    My_IIC_Msg msg[2];
    (void)memset_s(msg, sizeof(msg), 0, sizeof(msg));
    msg[0].addr = addr;
    msg[0].buf = wdata;
    msg[0].len = wlen;
    msg[0].flags = 0;
    msg[1].addr = addr;
    msg[1].buf = rdata;
    msg[1].len = rlen;
    msg[1].flags = 1;
//I2C操作函数，并验证是否成功
    if (I2cTransfer(myi2cHand, (struct I2cMsg *)msg, 2) != 2) {
        HDF_LOGE("i2c write read err");
        return 12;
    }
    return 1;
}
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#include "osal_io.h"         /* 标准IO读写接口头文件 */
#define I2C_SDA_ADDR 0x00000000 /* I2C控制器SDA管脚配置寄存器地址 */
#define I2C_CLK_ADDR 0x00000000  /* I2C控制器SCL管脚配置寄存器地址 */
#define I2C_REG 0x000             /* I2C控制器SDA及SCL管脚配置值 */
OSAL_WRITEL(I2C_REG, IO_DEVICE_ADDR(I2C_SDA_ADDR));
OSAL_WRITEL(I2C_REG, IO_DEVICE_ADDR(I2C_CLK_ADDR));
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static DevHandle myi2cHand = NULL;
myi2cHand = I2cOpen(1); 
//为了确认是否打开I2C成功，可以有以下判断
//I2cOpen之前，判断myicHand是否为NULL，if(myi2cHand!=NULL){报错代码}
//I2cOpen之后，判断myi2cHand是否写入数据，if(myi2cHand==NULL){报错代码}
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typedef struct
{
    uint16_t addr;	//I2C设备地址
    uint8_t *buf;	//数据地址
    uint16_t len;	//数据长度
    uint16_t flags;	//I2C模式
} My_IIC_Msg;
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int MyIICRead(uint32_t addr, uint8_t *data, uint32_t len)
{
//构建I2C使用的数据类型
    My_IIC_Msg msg;
    msg.addr = addr;
    msg.buf = data;
    msg.len = len;
    msg.flags = 1;	//读取模式

/*可添加验证I2C是否开启，if (myi2cHand == NULL){报错} */


/*I2cTransfer函数为I2C操作函数，参数一为DevHandle类型的I2C地址，参数二为数据地址，参数三为操作次数*/
 	I2cTransfer(myi2cHand, (struct I2cMsg *)&msg, 1)；

/*可添加验证I2C传输是否成功，判断I2cTransfer函数的返回值是否为参数三*/
   return 1;
} 

//使用IA1上的BH1750
uint8_t recv_data[2] = {0};
MyIICRead((0x23 << 1), recv_data, 2);
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