File content as of revision 0:1392ebe3241b:

#include "mbed.h"
#include "main.h"
#include "sx1272-hal.h"
#include "debug.h"

/* Set this flag to '1' to display debug messages on the console */
#define DEBUG_MESSAGE   1

/* Set this flag to '1' to use the LoRa modulation or to '0' to use FSK modulation */
#define USE_MODEM_LORA  1
#define USE_MODEM_FSK   !USE_MODEM_LORA

#define RF_FREQUENCY                                    868000000 // Hz
#define TX_OUTPUT_POWER                                 14        // 14 dBm

#if USE_MODEM_LORA == 1

#define LORA_BANDWIDTH                              2         // [0: 125 kHz,
//  1: 250 kHz,
//  2: 500 kHz,
//  3: Reserved]
#define LORA_SPREADING_FACTOR                       7         // [SF7..SF12]
#define LORA_CODINGRATE                             1         // [1: 4/5,
//  2: 4/6,
//  3: 4/7,
//  4: 4/8]
#define LORA_PREAMBLE_LENGTH                        8         // Same for Tx and Rx
#define LORA_SYMBOL_TIMEOUT                         5         // Symbols
#define LORA_FIX_LENGTH_PAYLOAD_ON                  false
#define LORA_FHSS_ENABLED                           false
#define LORA_NB_SYMB_HOP                            4
#define LORA_IQ_INVERSION_ON                        false
#define LORA_CRC_ENABLED                            true

#elif USE_MODEM_FSK == 1

#define FSK_FDEV                                    25000     // Hz
#define FSK_DATARATE                                19200     // bps
#define FSK_BANDWIDTH                               50000     // Hz
#define FSK_AFC_BANDWIDTH                           83333     // Hz
#define FSK_PREAMBLE_LENGTH                         5         // Same for Tx and Rx
#define FSK_FIX_LENGTH_PAYLOAD_ON                   false
#define FSK_CRC_ENABLED                             true

#else
#error "Please define a modem in the compiler options."
#endif

#define RX_TIMEOUT_VALUE                                3500      // in ms
#define BUFFER_SIZE                                     32        // Define the payload size here

#if( defined ( TARGET_KL25Z ) || defined ( TARGET_LPC11U6X ) )
DigitalOut led( LED2 );
#else
DigitalOut led( LED1 );
#endif

/*
 *  Global variables declarations
 */
typedef enum {
    LOWPOWER = 0,
    IDLE,

    RX,
    RX_TIMEOUT,
    RX_ERROR,

    TX,
    TX_TIMEOUT,

    CAD,
    CAD_DONE
} AppStates_t;

volatile AppStates_t State = RX;

/*!
 * Radio events function pointer
 */
static RadioEvents_t RadioEvents;

/*
 *  Global variables declarations
 */
SX1272MB2xAS Radio( NULL );

const uint8_t PingMsg[] = "PING";
const uint8_t PongMsg[] = "PONG";
const uint8_t Coucou[] = "Coucou";
const uint8_t Loulou[] = "Loulou";

uint16_t BufferSize = BUFFER_SIZE;
uint8_t Buffer[BUFFER_SIZE];

int16_t RssiValue = 0.0;
int8_t SnrValue = 0.0;


//lecture btn
DigitalIn mybutton(USER_BUTTON);

int main( void )
{
    uint8_t i;
    bool isMaster = true;

    debug( "\n\n\r     SX1272 Ping Pong Demo Application \n\n\r" );

    // Initialize Radio driver
    RadioEvents.TxDone = OnTxDone;
    RadioEvents.RxDone = OnRxDone;
    RadioEvents.RxError = OnRxError;
    RadioEvents.TxTimeout = OnTxTimeout;
    RadioEvents.RxTimeout = OnRxTimeout;
    Radio.Init( &RadioEvents );

    // verify the connection with the board
    while( Radio.Read( REG_VERSION ) == 0x00  ) {
        debug( "Radio could not be detected!\n\r", NULL );
        wait( 1 );
    }

    debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1272MB2XAS ) ), "\n\r > Board Type: SX1272MB2xAS < \n\r" );

    Radio.SetChannel( RF_FREQUENCY );

#if USE_MODEM_LORA == 1

    debug_if( LORA_FHSS_ENABLED, "\n\n\r             > LORA FHSS Mode < \n\n\r" );
    debug_if( !LORA_FHSS_ENABLED, "\n\n\r             > LORA Mode < \n\n\r" );

    Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
                       LORA_SPREADING_FACTOR, LORA_CODINGRATE,
                       LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
                       LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP,
                       LORA_IQ_INVERSION_ON, 2000 );

    Radio.SetRxConfig( MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR,
                       LORA_CODINGRATE, 0, LORA_PREAMBLE_LENGTH,
                       LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON, 0,
                       LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP,
                       LORA_IQ_INVERSION_ON, true );

#elif USE_MODEM_FSK == 1

    debug("\n\n\r              > FSK Mode < \n\n\r" );
    Radio.SetTxConfig( MODEM_FSK, TX_OUTPUT_POWER, FSK_FDEV, 0,
                       FSK_DATARATE, 0,
                       FSK_PREAMBLE_LENGTH, FSK_FIX_LENGTH_PAYLOAD_ON,
                       FSK_CRC_ENABLED, 0, 0, 0, 2000 );

    Radio.SetRxConfig( MODEM_FSK, FSK_BANDWIDTH, FSK_DATARATE,
                       0, FSK_AFC_BANDWIDTH, FSK_PREAMBLE_LENGTH,
                       0, FSK_FIX_LENGTH_PAYLOAD_ON, 0, FSK_CRC_ENABLED,
                       0, 0, false, true );

#else

#error "Please define a modem in the compiler options."

#endif

    debug_if( DEBUG_MESSAGE, "Starting ON/OFF LED loop\r\n" );

    led = 0;

    Radio.Rx( RX_TIMEOUT_VALUE );

    while( 1 ) {
        switch( State ) {
            case RX:
                if( BufferSize > 0 ) {
                    if( strncmp( ( const char* )Buffer, ( const char* )Coucou, 6 ) == 0 ) {
                        debug("LED ON");
                        for(i=10;i<10;i++){
                            led = 1; // LED is ON
                        led = 0;
                        wait(0.2); // 200 ms
                        led = 0; // LED is OFF
                        led= 1;
                        wait(0.2); // 1 sec
                            }
                        
                        // envoi de la réponse
                        strcpy( ( char* )Buffer, ( char* )Loulou );
                        // We fill the buffer with numbers for the payload
                        for( i = 6; i < BufferSize; i++ ) {
                            Buffer[i] = i - 6;
                        }
                        wait_ms( 10 );
                        Radio.Send( Buffer, BufferSize );
                    }
                State = LOWPOWER;
                break;
            case TX:
                debug("state = TX\r\n");
                //led = !led;
                Radio.Rx( RX_TIMEOUT_VALUE );
                State = LOWPOWER;
                break;
            case RX_TIMEOUT:
                debug("state = RX_TIMEOUT\r\n");
                /*  if( isMaster == true )
                  {
                      // Send the next PING frame
                      strcpy( ( char* )Buffer, ( char* )PingMsg );
                      for( i = 4; i < BufferSize; i++ )
                      {
                          Buffer[i] = i - 4;
                      }
                      wait_ms( 10 );
                      Radio.Send( Buffer, BufferSize );
                  }
                  else
                  {
                      Radio.Rx( RX_TIMEOUT_VALUE );
                  }*/
                State = LOWPOWER;
                break;
            case RX_ERROR:
                debug("state = RX_ERROR\r\n");
                // We have received a Packet with a CRC error, send reply as if packet was correct
                /* if( isMaster == true )
                 {
                     // Send the next PING frame
                     strcpy( ( char* )Buffer, ( char* )PingMsg );
                     for( i = 4; i < BufferSize; i++ )
                     {
                         Buffer[i] = i - 4;
                     }
                     wait_ms( 10 );
                     Radio.Send( Buffer, BufferSize );
                 }
                 else
                 {
                     // Send the next PONG frame
                     strcpy( ( char* )Buffer, ( char* )PongMsg );
                     for( i = 4; i < BufferSize; i++ )
                     {
                         Buffer[i] = i - 4;
                     }
                     wait_ms( 10 );
                     Radio.Send( Buffer, BufferSize );
                 }*/
                State = LOWPOWER;
                break;
            case TX_TIMEOUT:
                debug("state = TX_TIMEOUT\r\n");
                Radio.Rx( RX_TIMEOUT_VALUE );
                State = RX;
                break;
            case LOWPOWER:
                // debug("state = LOWPOWER\r\n");
                //State = RX;
                break;
            default:
                debug("default\r\n");
                State = RX;
                break;
        }


    }



}

void OnTxDone( void )
{
    Radio.Sleep( );
    State = TX;
    debug_if( DEBUG_MESSAGE, "> Transmission terminee\n\r" );
}

void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr )
{
    Radio.Sleep( );
    BufferSize = size;
    memcpy( Buffer, payload, BufferSize );
    RssiValue = rssi;
    SnrValue = snr;
    State = RX;
    debug_if( DEBUG_MESSAGE, "> Reception terminee \n\r" );
}

void OnTxTimeout( void )
{
    Radio.Sleep( );
    State = TX_TIMEOUT;
    debug_if( DEBUG_MESSAGE, "> Transmission timeout\n\r" );
}

void OnRxTimeout( void )
{
    Radio.Sleep( );
    Buffer[BufferSize] = 0;
    State = RX_TIMEOUT;
    debug_if( DEBUG_MESSAGE, "> Reception timeout\n\r" );
}

void OnRxError( void )
{
    Radio.Sleep( );
    State = RX_ERROR;
    debug_if( DEBUG_MESSAGE, "> Erreur de reception \n\r" );
}