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Need help for NRF24L01P and SPI communication

Topic last updated 12 Jun 2018, by Alex BLOT. 0 replies
Alex BLOT
12 Jun 2018

Hey,

I'm using an nrf24l01p on NCS36510 baseboard from onsemiconductor with iot idk. ( baseboard rev 3.0 )

I'm using this mbed library : https://os.mbed.com/cookbook/nRF24L01-wireless-transceiver with the following code :

main.cpp

#include "mbed.h"
/*
============================================================================
 Name : main.cpp
 Author : Alexandre BLOT
 Version :
 Copyright : Blot Copyright
 Description : Exe source file
 
Required:                   
    Connect Power through USB/External supply 12v
             ___________
            |   IDK     |
            |___________|
 
 ============================================================================
*/
 
#include "mbed.h"
#include "nRF24L01P.h"
 
#define _NRF24L01P_REG_STATUS                0x07
 
 
Serial pc(USBTX, USBRX); // tx, rx
 
nRF24L01P my_nrf24l01p(D4, D3, D2, D10, D14, D15);    // mosi, miso, sck, csn, ce, irq
 
 
 
 
int main() {
 
 
// The nRF24L01+ supports transfers from 1 to 32 bytes, but Sparkfun's
//  "Nordic Serial Interface Board" (http://www.sparkfun.com/products/9019)
//  only handles 4 byte transfers in the ATMega code.
#define TRANSFER_SIZE   8
 
    char txData[TRANSFER_SIZE], rxData[TRANSFER_SIZE];
    int txDataCnt = 0;
    int rxDataCnt = 0;
 
    my_nrf24l01p.powerUp();
 
    my_nrf24l01p.setTxAddress();
 
 
    // Display the (default) setup of the nRF24L01+ chip
    pc.printf( "nRF24L01+ Frequency    : %d MHz\r\n",  my_nrf24l01p.getRfFrequency() );
    pc.printf( "nRF24L01+ Output power : %d dBm\r\n",  my_nrf24l01p.getRfOutputPower() );
    pc.printf( "nRF24L01+ Data Rate    : %d kbps\r\n", my_nrf24l01p.getAirDataRate() );
    pc.printf( "nRF24L01+ TX Address   : 0x%010llX\r\n", my_nrf24l01p.getTxAddress() );
    pc.printf( "nRF24L01+ RX Address   : 0x%010llX\r\n", my_nrf24l01p.getRxAddress() );
    pc.printf( "Type keys to test transfers:\r\n  (transfers are grouped into %d characters)\r\n", TRANSFER_SIZE );
 
    my_nrf24l01p.setTransferSize( TRANSFER_SIZE );
 
    my_nrf24l01p.setReceiveMode();
    my_nrf24l01p.enable();
 
 
    while (1) {
 
 
        // If we've received anything over the host serial link...
        if ( pc.readable() ) {
 
            // ...add it to the transmit buffer
            txData[txDataCnt++] = pc.getc();
 
            // If the transmit buffer is full
            if ( txDataCnt >= sizeof( txData ) ) {
 
                // Send the transmitbuffer via the nRF24L01+
                my_nrf24l01p.write( NRF24L01P_PIPE_P0, txData, txDataCnt );
 
                txDataCnt = 0;
            }
 
            // Toggle LED1 (to help debug Host -> nRF24L01+ communication)
            pc.printf("Transmitted\n");
        }
 
        // If we've received anything in the nRF24L01+...
        if ( my_nrf24l01p.readable() ) {
 
            // ...read the data into the receive buffer
            rxDataCnt = my_nrf24l01p.read( NRF24L01P_PIPE_P0, rxData, sizeof( rxData ) );
 
            // Display the receive buffer contents via the host serial link
            for ( int i = 0; rxDataCnt > 0; rxDataCnt--, i++ ) {
 
                pc.putc( rxData[i] );
            }
 
            // Toggle LED2 (to help debug nRF24L01+ -> Host communication)
            pc.printf("Received");
        }
 
      
 
 
 
 
    }
}

On the console i should be getting this : nRF24L01+ Frequency : 2402 MHz nRF24L01+ Output Power: 0 dBm nRF24L01+ Data Rate: 1000 kbps nRF24L01+ TX Address: 0xE7E7E7E7E7 nRF24L01+ RX Address: 0xE7E7E7E7E7

but instead i'm getting this :

nRF24L01+ Frequency : 2415 MHz nRF24L01+ Output power : 0 dBm nRF24L01+ Data Rate : 2000 kbps nRF24L01+ TX Address : 0x000000000lX nRF24L01+ RX Address : 0x000000000lX

I tried different pins and at this point i'm quite stuck, i also tried to debug it with a scope and put some pull up resistors

Here are the schematics of my board

http://www.onsemi.com/pub/Collateral/BB-GEVK_SCHEMATIC.PDF

I don't know if someone experienced the same problem or can help me but it would be very kind

If you need it i can show you how i connected my wires from the board to the module

Best Regards,