uint8_t S[8] = {0x00, 0x01, 0xAC, 0xff, 0xfd, 0xfe, 0x21, 0x45}, O[8] = {0x00, 0x01, 0xAD, 0xff, 0xfd, 0xfe, 0x21, 0x45};
uint16_t E = 0; //eoor count

uint16_t BER(uint8_t *Src, uint8_t *Org, uint16_t len)
{
    uint8_t XR = 0;
    uint16_t err = 0;
    for (int cnt = 0; cnt < len; cnt++)
    {
        XR = *(Src+cnt) ^ *(Org+cnt);
        for (int lcn = 0; lcn < 8; lcn++)
        {
            if (XR >> lcn & 1) err++;
        }
    }
    return err;
}