串口输入十六进制字符串数据，接收后转换为十进制数据

int main(int argc,char * argv[])
{
    int fd;
    int recv_buf[64];
    int addr = 0,reg = 0,rw,i2cnum;
    char i2cdev[64];
    if(argc!=4)
    {
        printf("Usage:i2c_read [ADDR] [REG] [I2CBUSNUM]\n");
        return 0;
    }

    //addr=atoi(argv[1]);
    //reg=atoi(argv[2]);
    i2cnum=atoi(argv[3]);
    sprintf(i2cdev,"/dev/i2c-%d",i2cnum);
    sscanf(argv[1],"%x",&addr);   //通过sscanf函数转换
    sscanf(argv[2],"%x",®);    
    
    
    fd=open(i2cdev,O_RDWR);
    if(fd==-1)
    {
        printf("Can not open the device!\n");
        return -1;
    }

    recv_buf[0]=i2c_read(fd,addr,reg);
    printf("READ I2C SLAVEADDR=0x%02X, ADDR=0x%02X DATA=0x%02X\n",addr,reg,recv_buf[0]);        
            

    close(fd);
    return 0;
}