static uint16_t esky150_init()
{
    uint8_t rx_addr[ADDR_SIZE] = { 0x73, 0x73, 0x74, 0x63 };
    uint8_t tx_addr[ADDR_SIZE] = { 0x71, 0x0A, 0x31, 0xF4 };
    NRF24L01_Initialize();

    NRF24L01_WriteReg(NRF24L01_00_CONFIG, CRC_CONFIG); 
    NRF24L01_WriteReg(NRF24L01_01_EN_AA, 0x00);      // No Auto Acknoledgement
    NRF24L01_WriteReg(NRF24L01_02_EN_RXADDR, 0x01);  // Enable data pipe 0
    NRF24L01_WriteReg(NRF24L01_03_SETUP_AW, ADDR_SIZE-2);   // 4-byte RX/TX address
    NRF24L01_WriteReg(NRF24L01_04_SETUP_RETR, 0);    // Disable retransmit
    NRF24L01_SetPower(Model.tx_power);
    NRF24L01_SetBitrate(NRF24L01_BR_2M);
    NRF24L01_WriteRegisterMulti(NRF24L01_0A_RX_ADDR_P0, rx_addr, ADDR_SIZE);
    NRF24L01_WriteRegisterMulti(NRF24L01_10_TX_ADDR, tx_addr, ADDR_SIZE);


    NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);     // Clear data ready, data sent, and retransmit
    NRF24L01_WriteReg(NRF24L01_11_RX_PW_P0, PAYLOADSIZE);   // bytes of data payload for pipe 0


    NRF24L01_Activate(0x73);
    NRF24L01_WriteReg(NRF24L01_1C_DYNPD, 1); // Dynamic payload for data pipe 0
    // Enable: Dynamic Payload Length, Payload with ACK , W_TX_PAYLOAD_NOACK
    NRF24L01_WriteReg(NRF24L01_1D_FEATURE, BV(NRF2401_1D_EN_DPL) | BV(NRF2401_1D_EN_ACK_PAY) | BV(NRF2401_1D_EN_DYN_ACK));

    // Check for Beken BK2421/BK2423 chip
    // It is done by using Beken specific activate code, 0x53
    // and checking that status register changed appropriately
    // There is no harm to run it on nRF24L01 because following
    // closing activate command changes state back even if it
    // does something on nRF24L01
    NRF24L01_Activate(0x53); // magic for BK2421 bank switch
    printf("Trying to switch banks\n");
    if (NRF24L01_ReadReg(NRF24L01_07_STATUS) & 0x80) {
        printf("BK2421 detected\n");
//        long nul = 0;
        // Beken registers don't have such nice names, so we just mention
        // them by their numbers
        // It's all magic, eavesdropped from real transfer and not even from the
        // data sheet - it has slightly different values
        NRF24L01_WriteRegisterMulti(0x00, (uint8_t *) "\x40\x4B\x01\xE2", 4);
        NRF24L01_WriteRegisterMulti(0x01, (uint8_t *) "\xC0\x4B\x00\x00", 4);
        NRF24L01_WriteRegisterMulti(0x02, (uint8_t *) "\xD0\xFC\x8C\x02", 4);
        NRF24L01_WriteRegisterMulti(0x03, (uint8_t *) "\xF9\x00\x39\x21", 4);
        NRF24L01_WriteRegisterMulti(0x04, (uint8_t *) "\xC1\x96\x9A\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x05, (uint8_t *) "\x24\x06\x7F\xA6", 4);
        NRF24L01_WriteRegisterMulti(0x0C, (uint8_t *) "\x00\x12\x73\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0D, (uint8_t *) "\x46\xB4\x80\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0E, (uint8_t *) "\x41\x10\x04\x82\x20\x08\x08\xF2\x7D\xEF\xFF", 11);
        NRF24L01_WriteRegisterMulti(0x04, (uint8_t *) "\xC7\x96\x9A\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x04, (uint8_t *) "\xC1\x96\x9A\x1B", 4);
    } else {
        printf("nRF24L01 detected\n");
    }
    NRF24L01_Activate(0x53); // switch bank back

    // Delay 50 ms
    return 50000u;
}
Exemple #2
0
// Check for Beken BK2421/BK2423 chip
// It is done by using Beken specific activate code, 0x53
// and checking that status register changed appropriately
// There is no harm to run it on nRF24L01 because following
// closing activate command changes state back even if it
// does something on nRF24L01
// For detailed description of what's happening here see 
//   http://www.inhaos.com/uploadfile/otherpic/BK2423%20Datasheet%20v2.0.pdf
//   http://www.inhaos.com/uploadfile/otherpic/AN0008-BK2423%20Communication%20In%20250Kbps%20Air%20Rate.pdf
static void initialize_beken(void)
{
    NRF24L01_Activate(0x53); // magic for BK2421/BK2423 bank switch
    printf("Trying to switch banks\n");
    if (NRF24L01_ReadReg(NRF24L01_07_STATUS) & 0x80) {
        printf("BK2421 detected\n");
        // Beken registers don't have such nice names, so we just mention
        // them by their numbers
        // It's all magic, eavesdropped from real transfer and not even from the
        // data sheet - it has slightly different values
        NRF24L01_WriteRegisterMulti(0x00, (uint8_t *) "\x40\x4B\x01\xE2", 4);
        NRF24L01_WriteRegisterMulti(0x01, (uint8_t *) "\xC0\x4B\x00\x00", 4);
        NRF24L01_WriteRegisterMulti(0x02, (uint8_t *) "\xD0\xFC\x8C\x02", 4);
        NRF24L01_WriteRegisterMulti(0x03, (uint8_t *) "\xF9\x00\x39\x21", 4); // V202
//        NRF24L01_WriteRegisterMulti(0x03, (uint8_t *) "\x99\x00\x39\x41", 4); // Beken datasheet
        NRF24L01_WriteRegisterMulti(0x04, (uint8_t *) "\xC1\x96\x9A\x1B", 4); // V202

        NRF24L01_WriteRegisterMulti(0x05, (uint8_t *) "\x24\x06\x7F\xA6", 4); // Disable RSSI
//        NRF24L01_WriteRegisterMulti(0x05, (uint8_t *) "\x3C\x02\x7F\xA6", 4); // Enable RSSI

//        NRF24L01_WriteRegisterMulti(0x0C, (uint8_t *) "\x00\x12\x73\x00", 4); // PLL locking time 120us, like BK2421
        NRF24L01_WriteRegisterMulti(0x0C, (uint8_t *) "\x00\x12\x73\x05", 4); // PLL locking time 130us, like nRF24L01
//        NRF24L01_WriteRegisterMulti(0x0D, (uint8_t *) "\x46\xB4\x80\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0D, (uint8_t *) "\x36\xB4\x80\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0E, (uint8_t *) "\x41\x10\x04\x82\x20\x08\x08\xF2\x7D\xEF\xFF", 11);

        NRF24L01_WriteRegisterMulti(0x04, (uint8_t *) "\xC7\x96\x9A\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x04, (uint8_t *) "\xC1\x96\x9A\x1B", 4);
    } else {
        printf("nRF24L01 detected\n");
    }
    NRF24L01_Activate(0x53); // switch bank back
}
Exemple #3
0
// The Beken radio chip can be improperly reset
// We try to set it into Bank 0, before that we try
// to verify that it is there at all
static void reset_beken(void)
{
    NRF24L01_Activate(0x53); // magic for BK2421/BK2423 bank switch
    if (NRF24L01_ReadReg(NRF24L01_07_STATUS) & 0x80) {
        NRF24L01_Activate(0x53); // switch to register set 0
    }
}
static int cflie_init()
{
    NRF24L01_Initialize();

    // CRC, radio on
    NRF24L01_SetTxRxMode(TX_EN);
    NRF24L01_WriteReg(NRF24L01_00_CONFIG, BV(NRF24L01_00_EN_CRC) | BV(NRF24L01_00_CRCO) | BV(NRF24L01_00_PWR_UP)); 
    NRF24L01_WriteReg(NRF24L01_01_EN_AA, 0x01);              // Auto Acknowledgement for data pipe 0
    NRF24L01_WriteReg(NRF24L01_02_EN_RXADDR, 0x01);          // Enable data pipe 0
    NRF24L01_WriteReg(NRF24L01_03_SETUP_AW, TX_ADDR_SIZE-2); // 5-byte RX/TX address
    NRF24L01_WriteReg(NRF24L01_04_SETUP_RETR, 0x13);         // 3 retransmits, 500us delay

    NRF24L01_WriteReg(NRF24L01_05_RF_CH, rf_channel);        // Defined by model id
    NRF24L01_SetBitrate(data_rate);                          // Defined by model id

    NRF24L01_SetPower(Model.tx_power);
    NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);             // Clear data ready, data sent, and retransmit

    NRF24L01_WriteRegisterMulti(NRF24L01_0A_RX_ADDR_P0, rx_tx_addr, TX_ADDR_SIZE);
    NRF24L01_WriteRegisterMulti(NRF24L01_10_TX_ADDR, rx_tx_addr, TX_ADDR_SIZE);

    // this sequence necessary for module from stock tx
    NRF24L01_ReadReg(NRF24L01_1D_FEATURE);
    NRF24L01_Activate(0x73);                          // Activate feature register
    NRF24L01_ReadReg(NRF24L01_1D_FEATURE);

    NRF24L01_WriteReg(NRF24L01_1C_DYNPD, 0x01);       // Enable Dynamic Payload Length on pipe 0
    NRF24L01_WriteReg(NRF24L01_1D_FEATURE, 0x06);     // Enable Dynamic Payload Length, enable Payload with ACK
    // 50ms delay in callback
    return 50000;
}
Exemple #5
0
static void DM002_init()
{
    NRF24L01_Initialize();
    NRF24L01_SetTxRxMode(TX_EN);
    XN297_SetTXAddr((uint8_t *)"\x26\xA8\x67\x35\xCC", DM002_ADDRESS_SIZE);

    NRF24L01_FlushTx();
    NRF24L01_FlushRx();
    NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);     // Clear data ready, data sent, and retransmit
    NRF24L01_WriteReg(NRF24L01_01_EN_AA, 0x00);      // No Auto Acknowldgement on all data pipes
    NRF24L01_WriteReg(NRF24L01_02_EN_RXADDR, 0x01);  // Enable data pipe 0 only
    NRF24L01_SetBitrate(NRF24L01_BR_1M);             // 1Mbps
    NRF24L01_SetPower(Model.tx_power);
    
    // Check for Beken BK2421/BK2423 chip
    // It is done by using Beken specific activate code, 0x53
    // and checking that status register changed appropriately
    // There is no harm to run it on nRF24L01 because following
    // closing activate command changes state back even if it
    // does something on nRF24L01
    NRF24L01_Activate(0x53); // magic for BK2421 bank switch
    dbgprintf("Trying to switch banks\n");
    if (NRF24L01_ReadReg(NRF24L01_07_STATUS) & 0x80) {
        dbgprintf("BK2421 detected\n");
        // Beken registers don't have such nice names, so we just mention
        // them by their numbers
        // It's all magic, eavesdropped from real transfer and not even from the
        // data sheet - it has slightly different values
        NRF24L01_WriteRegisterMulti(0x00, (u8 *) "\x40\x4B\x01\xE2", 4);
        NRF24L01_WriteRegisterMulti(0x01, (u8 *) "\xC0\x4B\x00\x00", 4);
        NRF24L01_WriteRegisterMulti(0x02, (u8 *) "\xD0\xFC\x8C\x02", 4);
        NRF24L01_WriteRegisterMulti(0x03, (u8 *) "\x99\x00\x39\x21", 4);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xD9\x96\x82\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x05, (u8 *) "\x24\x06\x7F\xA6", 4);
        NRF24L01_WriteRegisterMulti(0x0C, (u8 *) "\x00\x12\x73\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0D, (u8 *) "\x46\xB4\x80\x00", 4);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xDF\x96\x82\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xD9\x96\x82\x1B", 4);
    } else {
        dbgprintf("nRF24L01 detected\n");
    }
    NRF24L01_Activate(0x53); // switch bank back
}
Exemple #6
0
static void inavNrf24Setup(rx_spi_protocol_e protocol, const uint32_t *rxSpiId, int rfChannelHoppingCount)
{
    UNUSED(protocol);
    UNUSED(rfChannelHoppingCount);

    // sets PWR_UP, EN_CRC, CRCO - 2 byte CRC, only get IRQ pin interrupt on RX_DR
    NRF24L01_Initialize(BV(NRF24L01_00_CONFIG_EN_CRC) | BV(NRF24L01_00_CONFIG_CRCO) | BV(NRF24L01_00_CONFIG_MASK_MAX_RT) | BV(NRF24L01_00_CONFIG_MASK_TX_DS));

#ifdef USE_AUTO_ACKKNOWLEDGEMENT
    NRF24L01_WriteReg(NRF24L01_01_EN_AA, BV(NRF24L01_01_EN_AA_ENAA_P0)); // auto acknowledgment on P0
    NRF24L01_WriteReg(NRF24L01_02_EN_RXADDR, BV(NRF24L01_02_EN_RXADDR_ERX_P0));
    NRF24L01_WriteReg(NRF24L01_03_SETUP_AW, NRF24L01_03_SETUP_AW_5BYTES); // 5-byte RX/TX address
    NRF24L01_WriteReg(NRF24L01_04_SETUP_RETR, 0);
    NRF24L01_Activate(0x73); // activate R_RX_PL_WID, W_ACK_PAYLOAD, and W_TX_PAYLOAD_NOACK registers
    NRF24L01_WriteReg(NRF24L01_1D_FEATURE, BV(NRF24L01_1D_FEATURE_EN_ACK_PAY) | BV(NRF24L01_1D_FEATURE_EN_DPL));
    NRF24L01_WriteReg(NRF24L01_1C_DYNPD, BV(NRF24L01_1C_DYNPD_DPL_P0)); // enable dynamic payload length on P0
    //NRF24L01_Activate(0x73); // deactivate R_RX_PL_WID, W_ACK_PAYLOAD, and W_TX_PAYLOAD_NOACK registers

    NRF24L01_WriteRegisterMulti(NRF24L01_10_TX_ADDR, rxTxAddr, RX_TX_ADDR_LEN);
#else
    NRF24L01_SetupBasic();
#endif

    NRF24L01_WriteReg(NRF24L01_06_RF_SETUP, NRF24L01_06_RF_SETUP_RF_DR_250Kbps | NRF24L01_06_RF_SETUP_RF_PWR_n12dbm);
    // RX_ADDR for pipes P1-P5 are left at default values
    NRF24L01_WriteRegisterMulti(NRF24L01_0A_RX_ADDR_P0, rxTxAddr, RX_TX_ADDR_LEN);
    NRF24L01_WriteReg(NRF24L01_11_RX_PW_P0, payloadSize);

#ifdef USE_BIND_ADDRESS_FOR_DATA_STATE
    inavSetBound();
    UNUSED(rxSpiId);
#else
    rxSpiId = NULL; // !!TODO remove this once  configurator supports setting rx_id
    if (rxSpiId == NULL || *rxSpiId == 0) {
        rxSpiIdPtr = NULL;
        protocolState = STATE_BIND;
        inavRfChannelCount = 1;
        inavRfChannelIndex = 0;
        NRF24L01_SetChannel(INAV_RF_BIND_CHANNEL);
    } else {
        rxSpiIdPtr = (uint32_t*)rxSpiId;
        // use the rxTxAddr provided and go straight into DATA_STATE
        memcpy(rxTxAddr, rxSpiId, sizeof(uint32_t));
        rxTxAddr[4] = RX_TX_ADDR_4;
        inavSetBound();
    }
#endif

    NRF24L01_SetRxMode(); // enter receive mode to start listening for packets
    // put a null packet in the transmit buffer to be sent as ACK on first receive
    writeAckPayload(ackPayload, payloadSize);
}
Exemple #7
0
static int cflie_init()
{
    NRF24L01_Initialize();

    // CRC, radio on
    NRF24L01_SetTxRxMode(TX_EN);
    NRF24L01_WriteReg(NRF24L01_00_CONFIG, BV(NRF24L01_00_EN_CRC) | BV(NRF24L01_00_CRCO) | BV(NRF24L01_00_PWR_UP)); 
    NRF24L01_WriteReg(NRF24L01_01_EN_AA, 0x01);              // Auto Acknowledgement for data pipe 0
    NRF24L01_WriteReg(NRF24L01_02_EN_RXADDR, 0x01);          // Enable data pipe 0
    NRF24L01_WriteReg(NRF24L01_03_SETUP_AW, TX_ADDR_SIZE-2); // 5-byte RX/TX address
    NRF24L01_WriteReg(NRF24L01_04_SETUP_RETR, 0x13);         // 3 retransmits, 500us delay

    NRF24L01_WriteReg(NRF24L01_05_RF_CH, rf_channel);        // Defined by model id
    NRF24L01_SetBitrate(data_rate);                          // Defined by model id

    NRF24L01_SetPower(Model.tx_power);
    NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);             // Clear data ready, data sent, and retransmit

    NRF24L01_WriteRegisterMulti(NRF24L01_0A_RX_ADDR_P0, rx_tx_addr, TX_ADDR_SIZE);
    NRF24L01_WriteRegisterMulti(NRF24L01_10_TX_ADDR, rx_tx_addr, TX_ADDR_SIZE);

    // this sequence necessary for module from stock tx
    NRF24L01_ReadReg(NRF24L01_1D_FEATURE);
    NRF24L01_Activate(0x73);                          // Activate feature register
    NRF24L01_ReadReg(NRF24L01_1D_FEATURE);

    NRF24L01_WriteReg(NRF24L01_1C_DYNPD, 0x01);       // Enable Dynamic Payload Length on pipe 0
    NRF24L01_WriteReg(NRF24L01_1D_FEATURE, 0x06);     // Enable Dynamic Payload Length, enable Payload with ACK

    // Check for Beken BK2421/BK2423 chip
    // It is done by using Beken specific activate code, 0x53
    // and checking that status register changed appropriately
    // There is no harm to run it on nRF24L01 because following
    // closing activate command changes state back even if it
    // does something on nRF24L01
    NRF24L01_Activate(0x53); // magic for BK2421 bank switch
    dbgprintf("Trying to switch banks\n");
    if (NRF24L01_ReadReg(NRF24L01_07_STATUS) & 0x80) {
        dbgprintf("BK2421 detected\n");
        long nul = 0;
        // Beken registers don't have such nice names, so we just mention
        // them by their numbers
        // It's all magic, eavesdropped from real transfer and not even from the
        // data sheet - it has slightly different values
        NRF24L01_WriteRegisterMulti(0x00, (u8 *) "\x40\x4B\x01\xE2", 4);
        NRF24L01_WriteRegisterMulti(0x01, (u8 *) "\xC0\x4B\x00\x00", 4);
        NRF24L01_WriteRegisterMulti(0x02, (u8 *) "\xD0\xFC\x8C\x02", 4);
        NRF24L01_WriteRegisterMulti(0x03, (u8 *) "\xF9\x00\x39\x21", 4);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xC1\x96\x9A\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x05, (u8 *) "\x24\x06\x7F\xA6", 4);
        NRF24L01_WriteRegisterMulti(0x06, (u8 *) &nul, 4);
        NRF24L01_WriteRegisterMulti(0x07, (u8 *) &nul, 4);
        NRF24L01_WriteRegisterMulti(0x08, (u8 *) &nul, 4);
        NRF24L01_WriteRegisterMulti(0x09, (u8 *) &nul, 4);
        NRF24L01_WriteRegisterMulti(0x0A, (u8 *) &nul, 4);
        NRF24L01_WriteRegisterMulti(0x0B, (u8 *) &nul, 4);
        NRF24L01_WriteRegisterMulti(0x0C, (u8 *) "\x00\x12\x73\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0D, (u8 *) "\x46\xB4\x80\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0E, (u8 *) "\x41\x10\x04\x82\x20\x08\x08\xF2\x7D\xEF\xFF", 11);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xC7\x96\x9A\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xC1\x96\x9A\x1B", 4);
    } else {
        dbgprintf("nRF24L01 detected\n");
    }
    NRF24L01_Activate(0x53); // switch bank back

    // 50ms delay in callback
    return 50000;
}
Exemple #8
0
static void esky_init(u8 bind)
{
    NRF24L01_Initialize();

    // 2-bytes CRC, radio off
    NRF24L01_WriteReg(NRF24L01_00_CONFIG, BV(NRF24L01_00_EN_CRC) | BV(NRF24L01_00_CRCO)); 
    NRF24L01_WriteReg(NRF24L01_01_EN_AA, 0x00);            // No Auto Acknoledgement
    NRF24L01_WriteReg(NRF24L01_02_EN_RXADDR, 0x01);        // Enable data pipe 0
    if (bind) {
        set_bind_address();
    } else {
        set_data_address();
    }
    NRF24L01_WriteReg(NRF24L01_04_SETUP_RETR, 0);          // No auto retransmission
    NRF24L01_WriteReg(NRF24L01_05_RF_CH, 50);              // Channel 50 for bind packets
    NRF24L01_SetBitrate(0);                                // 1Mbps
    NRF24L01_SetPower(Model.tx_power);
    NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);           // Clear data ready, data sent, and retransmit
//    NRF24L01_WriteReg(NRF24L01_08_OBSERVE_TX, 0x00);     // no write bits in this field
//    NRF24L01_WriteReg(NRF24L01_00_CD, 0x00);             // same
//    NRF24L01_WriteReg(NRF24L01_0C_RX_ADDR_P2, 0xC3);       // LSB byte of pipe 2 receive address
//    NRF24L01_WriteReg(NRF24L01_0D_RX_ADDR_P3, 0xC4);
//    NRF24L01_WriteReg(NRF24L01_0E_RX_ADDR_P4, 0xC5);
//    NRF24L01_WriteReg(NRF24L01_0F_RX_ADDR_P5, 0xC6);
    NRF24L01_WriteReg(NRF24L01_11_RX_PW_P0, PAYLOADSIZE);  // bytes of data payload for pipe 0
    NRF24L01_WriteReg(NRF24L01_12_RX_PW_P1, PAYLOADSIZE);
    NRF24L01_WriteReg(NRF24L01_13_RX_PW_P2, PAYLOADSIZE);
    NRF24L01_WriteReg(NRF24L01_14_RX_PW_P3, PAYLOADSIZE);
    NRF24L01_WriteReg(NRF24L01_15_RX_PW_P4, PAYLOADSIZE);
    NRF24L01_WriteReg(NRF24L01_16_RX_PW_P5, PAYLOADSIZE);
    NRF24L01_WriteReg(NRF24L01_17_FIFO_STATUS, 0x00);      // Just in case, no real bits to write here

    // Check for Beken BK2421/BK2423 chip
    // It is done by using Beken specific activate code, 0x53
    // and checking that status register changed appropriately
    // There is no harm to run it on nRF24L01 because following
    // closing activate command changes state back even if it
    // does something on nRF24L01
    NRF24L01_Activate(0x53); // magic for BK2421 bank switch
    printf("Trying to switch banks\n");
    if (NRF24L01_ReadReg(NRF24L01_07_STATUS) & 0x80) {
        printf("BK2421 detected\n");
        // Beken registers don't have such nice names, so we just mention
        // them by their numbers
        // It's all magic, eavesdropped from real transfer and not even from the
        // data sheet - it has slightly different values
        NRF24L01_WriteRegisterMulti(0x00, (u8 *) "\x40\x4B\x01\xE2", 4);
        NRF24L01_WriteRegisterMulti(0x01, (u8 *) "\xC0\x4B\x00\x00", 4);
        NRF24L01_WriteRegisterMulti(0x02, (u8 *) "\xD0\xFC\x8C\x02", 4);
        NRF24L01_WriteRegisterMulti(0x03, (u8 *) "\xF9\x00\x39\x21", 4);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xC1\x96\x9A\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x05, (u8 *) "\x24\x06\x7F\xA6", 4);
        NRF24L01_WriteRegisterMulti(0x0C, (u8 *) "\x00\x12\x73\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0D, (u8 *) "\x46\xB4\x80\x00", 4);
        NRF24L01_WriteRegisterMulti(0x0E, (u8 *) "\x41\x10\x04\x82\x20\x08\x08\xF2\x7D\xEF\xFF", 11);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xC7\x96\x9A\x1B", 4);
        NRF24L01_WriteRegisterMulti(0x04, (u8 *) "\xC1\x96\x9A\x1B", 4);
    } else {
        printf("nRF24L01 detected\n");
    }
    NRF24L01_Activate(0x53); // switch bank back

    // Implicit delay in callback
    // delay(50);
}