int main()
{
    unsigned char reg6=0x04;
    unsigned char reg7=0x00;
    //unsigned char data[2];
    union {
        unsigned char data[2];
        short int srate_ratio;
    }un_data;

    un_data.data[0]=reg7;
    un_data.data[1]=reg6;

    unsigned char srate_system = 48;
    unsigned char srate_in;


    srate_in = (srate_system<<11)/un_data.srate_ratio;

    printf("\nsrate_in: %d\n", srate_in);

    return 0;
}