emetteur.cpp
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////////////////////////////////////////////////////////////////////////////////
//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 3500 // in ms
#define BUFFER_SIZE 32 // Define the payload size here
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//Variables globales
typedef enum
{
LOWPOWER = 0,
IDLE,
RX,
RX_TIMEOUT,
RX_ERROR,
TX,
TX_TIMEOUT,
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;
const uint8_t TestMsg[] = "TEST";
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//Fonctions utiles
//Debug pour savoir si le message a été transmis
void OnTxDone( void )
{
Radio.SetChannel( HoppingFrequencies[0] );
Radio.Sleep( );
State = TX;
debug_if( DEBUG_MESSAGE, "Envoye\n\r" );
}
//Time out de transmission. Échec de l'envoi
void OnTxTimeout( void )
{
Radio.SetChannel(HoppingFrequencies[0]);
Radio.Sleep( );
State = TX_TIMEOUT;
debug_if( DEBUG_MESSAGE, "Echec de l'envoi\n\r" );
}
//Modification du canal d'emission
void OnFhssChangeChannel( uint8_t channelIndex )
{
Radio.SetChannel(HoppingFrequencies[channelIndex]);
debug_if(DEBUG_MESSAGE, "F%d-", channelIndex);
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
//Main emission
int main( void )
{
uint8_t i;
debug("\n\n\rEmetteur SX1276\n\n\r");
// Initialize Radio driver
RadioEvents.TxDone = OnTxDone;
RadioEvents.TxTimeout = OnTxTimeout;
RadioEvents.FhssChangeChannel = OnFhssChangeChannel;
Radio.Init(&RadioEvents);
//Véification de la connexion avec la carte
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\rMateriel detecte : SX1276MB1LAS < \n\r" );
debug_if( ( DEBUG_MESSAGE & ( Radio.DetectBoardType( ) == SX1276MB1MAS ) ), "\n\rMateriel detecte : SX1276MB1MAS < \n\r" );
//Paramétrage du canal
Radio.SetChannel( HoppingFrequencies[0] );
#if USE_MODEM_LORA == 1
debug_if( LORA_FHSS_ENABLED, "\n\n\rLORA FHSS Mode\n\n\r" );
debug_if( !LORA_FHSS_ENABLED, "\n\n\rLORA Mode\n\n\r" );
//Configuration du modem transmission
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, 4000 );
#else
#error "Aucun modem defini"
#endif
debug_if( DEBUG_MESSAGE, "Procedure d'emission lancee\r\n" );
//Boucle d'émission infinie
while(1)
{
debug( "Tentative d'envoi :\r\n" );
strcpy((char*)Buffer, (char*)TestMsg);
// We fill the buffer with numbers for the payload
for(i=4; i<BufferSize; i++)
{
Buffer[i] = i - 4;
}
debug( "Message envoye\r\n" );
wait_ms(1000);
Radio.Send(Buffer, BufferSize);
}
}