File content as of revision 5:9c5aa92a12e6:

#include "mbed.h"
#include "nRF24L01P.h"
#include "platform/mbed_thread.h"

#define SPI3_MOSI D11
#define SPI3_MISO D12
#define SPI3_SCLK D13
#define CSN A3
#define CE D8
#define IRQ A0

Serial pc(USBTX, USBRX); // tx, rx

nRF24L01P my_nrf24l01p(SPI3_MOSI, SPI3_MISO, SPI3_SCLK, CSN, CE, IRQ);    // mosi, miso, sck, csn, ce, irq

DigitalOut myled1(D4);
DigitalOut myled2(D5);

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   4

    char rxData[TRANSFER_SIZE];
    int rxDataCnt = 0;

    my_nrf24l01p.powerUp();

    // Display the (default) setup of the nRF24L01+ chip
    pc.printf("Default setup : \r\n");
    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("\r\n\r\n");
    
    my_nrf24l01p.setRfFrequency(NRF24L01P_MIN_RF_FREQUENCY);
    my_nrf24l01p.setAirDataRate(NRF24L01P_DATARATE_2_MBPS);
    my_nrf24l01p.setTxAddress(0xFFE);
    my_nrf24l01p.setRxAddress(0xFFA);

    pc.printf("Custom setup : \r\n");
    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("\r\n\r\n");


    my_nrf24l01p.setTransferSize( TRANSFER_SIZE );

    my_nrf24l01p.setReceiveMode();
    my_nrf24l01p.enable();

    pc.printf( "Type keys to test transfers:\r\n  (transfers are grouped into %d characters)\r\n", TRANSFER_SIZE );

    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)
            myled1 = !myled1;
        }

        // 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)
            myled2 = !myled2;
        }
    }
}