DSM2/X protocol errors

static void set_sop_data_crc()
{
    u8 pn_row = get_pn_row(channels[chidx]);
    u8 data_code[16];
    //printf("Ch: %d Row: %d SOP: %d Data: %d\n", ch[chidx], pn_row, sop_col, data_col);
    CYRF_ConfigRFChannel(channels[chidx]);
    CYRF_ConfigCRCSeed(crcidx ? ~crc : crc);
    CYRF_ConfigSOPCode(pncodes[pn_row][sop_col]);
    memcpy(data_code, pncodes[pn_row][data_col], 8);
    if((pn_row == 3) && (data_col == 7) && (Model.proto_opts[PROTOOPTS_ORANGERX] == 1)){
        memcpy(data_code + 8, (void *)"\x88\xE1\xD6\x31\x26\x5F\xBD\x40", 8);
    } else {
        memcpy(data_code + 8, pncodes[pn_row][data_col + 1], 8);
    }
    CYRF_ConfigDataCode(data_code, 16);
    /* setup for next iteration */
    if(Model.protocol == PROTOCOL_DSMX)
        chidx = (chidx + 1) % 23;
    else
        chidx = (chidx + 1) % 2;
    crcidx = !crcidx;
}

//NOTE: This routine will reset the CRC Seed
void CYRF_FindBestChannels(u8 *channels, u8 len, u8 minspace, u8 min, u8 max)
{
    #define NUM_FREQ 80
    #define FREQ_OFFSET 4
    u8 rssi[NUM_FREQ];

    if (min < FREQ_OFFSET)
        min = FREQ_OFFSET;
    if (max > NUM_FREQ)
        max = NUM_FREQ;

    int i;
    int j;
    memset(channels, 0, sizeof(u8) * len);
    CYRF_ConfigCRCSeed(0x0000);
    CYRF_SetTxRxMode(RX_EN);
    //Wait for pre-amp to switch from send to receive
    Delay(1000);
    for(i = 0; i < NUM_FREQ; i++) {
        CYRF_ConfigRFChannel(i); //slow channel require 270usec for synthesizer to settle 
        Delay(300); //??? what is the real delay???
        if ( !(CYRF_ReadRegister(CYRF_05_RX_CTRL) & 0x80)) {
            CYRF_WriteRegister(CYRF_05_RX_CTRL, 0x80); //Prepare to receive
            Delay(10);
            CYRF_ReadRegister(CYRF_13_RSSI); //dummy read
        }
        rssi[i] = CYRF_ReadRegister(CYRF_13_RSSI) & 0x1F;        
    }

    for (i = 0; i < len; i++) {
        channels[i] = min;
        for (j = min; j < max; j++) {
            if (rssi[j] < rssi[channels[i]]) {
                channels[i] = j;
            }            
        }
        for (j = channels[i] - minspace; j < channels[i] + minspace; j++) {
            //Ensure we don't reuse any channels within minspace of the selected channel again
            if (j < 0 || j >= NUM_FREQ)
                continue;
            rssi[j] = 0xff;
        }
    }
    CYRF_SetTxRxMode(TX_EN);
}