recepteur.cpp
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////////////////////////////////////////////////////////////////////////////////
/*RECEPTEUR LoRa
par : Robin Cavalieri
IMA5SC
PFE 2018 */
////////////////////////////////////////////////////////////////////////////////
//Headers
#include "mbed.h"
#include "main.h"
#include "sx1276-hal.h"
#include "debug.h"
////////////////////////////////////////////////////////////////////////////////
#define DEBUG_MESSAGE 1
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//Modulation LoRa active
#define USE_MODEM_LORA 1
#define USE_MODEM_FSK !USE_MODEM_LORA
//Paramètres
#define RF_FREQUENCY 868000000 //Hz : Fréquence de travail pour UE
#define TX_OUTPUT_POWER 14 //dBm : puissance de sortie du signal
#define LORA_BANDWIDTH 1 // 0:125 kHz de BP
#define LORA_SPREADING_FACTOR 10 // [SF7..SF12] Portée du débit. grande portée inutile
#define LORA_CODINGRATE 1
#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 true
#define LORA_NB_SYMB_HOP 4
#define LORA_IQ_INVERSION_ON false
#define LORA_CRC_ENABLED true
#define RX_TIMEOUT_VALUE 0 // in ms
#define BUFFER_SIZE 32 // Define the payload size here
#define TRAME_SIZE 13
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//Variables globales
typedef enum
{
LOWPOWER = 0,
IDLE,
RX,
RX_TIMEOUT,
RX_ERROR,
CAD,
CAD_DONE
}AppStates_t;
volatile AppStates_t State = LOWPOWER;
static RadioEvents_t RadioEvents;
SX1276MB1xAS Radio( NULL );
uint16_t BufferSize = BUFFER_SIZE;
uint8_t Buffer[BUFFER_SIZE];
int16_t RssiValue = 0.0;
int8_t SnrValue = 0.0;
uint8_t receptMsg[13];
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//Main réception
int main( void )
{
debug("\nRecepteur SX1276 \n\n\r");
// Initialize Radio driver
RadioEvents.RxDone = OnRxDone;
RadioEvents.RxError = OnRxError;
RadioEvents.RxTimeout = OnRxTimeout;
RadioEvents.FhssChangeChannel = OnFhssChangeChannel;
Radio.Init(&RadioEvents);
//Véification de la communication avec la board
while(Radio.Read(REG_VERSION) == 0x00)
{
debug("Aucune radio detectee\n\r", NULL);
wait(1);
}
//Checking du matériel connecté
debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1LAS ) ), "\n\r Materiel detecte : SX1276MB1LAS \n\r" );
debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1MAS ) ), "\n\r Materiel detecte : SX1276MB1MAS \n\r" );
//Paramétrage du canal
Radio.SetChannel( HoppingFrequencies[0] );
#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.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 );
#else
#error "Aucun modem defini"
#endif
debug_if(DEBUG_MESSAGE, "Reception en cours...\r\n");
Radio.Rx(RX_TIMEOUT_VALUE); //Reception mode en continu
while(1)
{
if( BufferSize > 0 )
{
if( strncmp( ( const char* )Buffer, ( const char* )receptMsg, TRAME_SIZE ) == 0 )
{
debug( "Trame recue : %s\r\n",(char*)Buffer);
}
else
{
debug("Attente d'une trame...\n");
}
wait_ms(1000);
}
}
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//Fonctions utiles
void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr )
{
Radio.SetChannel( HoppingFrequencies[0] );
Radio.Sleep( );
BufferSize = size;
memcpy( Buffer, payload, BufferSize );
RssiValue = rssi;
SnrValue = snr;
State = RX;
debug_if( DEBUG_MESSAGE, "> OnRxDone\n\r" );
}
void OnRxTimeout( void )
{
Radio.SetChannel( HoppingFrequencies[0] );
Radio.Sleep( );
Buffer[BufferSize] = 0;
State = RX_TIMEOUT;
debug_if( DEBUG_MESSAGE, "> OnRxTimeout\n\r" );
}
void OnRxError( void )
{
Radio.SetChannel( HoppingFrequencies[0] );
Radio.Sleep( );
State = RX_ERROR;
debug_if( DEBUG_MESSAGE, "> OnRxError\n\r" );
}
void OnFhssChangeChannel( uint8_t channelIndex )
{
Radio.SetChannel( HoppingFrequencies[channelIndex] );
debug_if( DEBUG_MESSAGE, "F%d-", channelIndex );
}
////////////////////////////////////////////////////////////////////////////////