linux下读写eeprom,linux下读写24c02 网记

#include #define file_i2c      "/dev/i2c-3"

#define BUFF_SIZE      32

#define I2C_SLAVE      0x0703       //IIC从器件的地址设置

#define I2C_RETRIES    0x0701

#define I2C_TIMEOUT    0x0702

#define I2C_RDWR       0x0707

#define I2C_M_TEN      0x0010

#define I2C_M_RD       0x0001

struct i2c_msg{

unsigned short addr;

unsigned short flags;

unsigned short len;

unsigned char *buf;

};

struct i2c_rdwr_ioctl_data{

struct i2c_msg *msgs;

int nmsgs;         /* nmsgs这个数量决定了有多少开始信号，对于“单开始时序”，取1*/

};

int main(void)

{

unsigned int fd_i2c,ret;

struct i2c_rdwr_ioctl_data e2prom_data;

fd_i2c = open(file_i2c,O_RDWR);

if(fd_i2c<0){

printf("open error \n");

exit(0);

}

e2prom_