uint8_t SX1276ReadRxGain( void )
{
if( LoRaOn == false )
{
return SX1276FskReadRxGain( );
}
else
{
return SX1276LoRaReadRxGain( );
}
}
/*!
* \brief Process the LoRa modem Rx and Tx state machines depending on the
* SX1276 operating mode.
*
* \retval rfState Current RF state [RF_IDLE, RF_BUSY,
* RF_RX_DONE, RF_RX_TIMEOUT,
* RF_TX_DONE, RF_TX_TIMEOUT]
*/
uint32_t SX1276LoRaProcess( void )
{
uint32_t result = RF_BUSY;
switch( RFLRState )
{
case RFLR_STATE_IDLE:
break;
case RFLR_STATE_RX_INIT:
SX1276LoRaSetOpMode( RFLR_OPMODE_STANDBY );
SX1276LR->RegIrqFlagsMask = RFLR_IRQFLAGS_RXTIMEOUT |
//RFLR_IRQFLAGS_RXDONE |
//RFLR_IRQFLAGS_PAYLOADCRCERROR |
RFLR_IRQFLAGS_VALIDHEADER |
RFLR_IRQFLAGS_TXDONE |
RFLR_IRQFLAGS_CADDONE |
//RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
RFLR_IRQFLAGS_CADDETECTED;
SX1276Write( REG_LR_IRQFLAGSMASK, SX1276LR->RegIrqFlagsMask );
if( LoRaSettings.FreqHopOn == true )
{
SX1276LR->RegHopPeriod = LoRaSettings.HopPeriod;
SX1276Read( REG_LR_HOPCHANNEL, &SX1276LR->RegHopChannel );
SX1276LoRaSetRFFrequency( HoppingFrequencies[SX1276LR->RegHopChannel & RFLR_HOPCHANNEL_CHANNEL_MASK] );
}
else
{
SX1276LR->RegHopPeriod = 255;
}
SX1276Write( REG_LR_HOPPERIOD, SX1276LR->RegHopPeriod );
// RxDone RxTimeout FhssChangeChannel CadDone
SX1276LR->RegDioMapping1 = RFLR_DIOMAPPING1_DIO0_00 | RFLR_DIOMAPPING1_DIO1_00 | RFLR_DIOMAPPING1_DIO2_00 | RFLR_DIOMAPPING1_DIO3_00;
// CadDetected ModeReady
SX1276LR->RegDioMapping2 = RFLR_DIOMAPPING2_DIO4_00 | RFLR_DIOMAPPING2_DIO5_00;
SX1276WriteBuffer( REG_LR_DIOMAPPING1, &SX1276LR->RegDioMapping1, 2 );
if( LoRaSettings.RxSingleOn == true ) // Rx single mode
{
SX1276LoRaSetOpMode( RFLR_OPMODE_RECEIVER_SINGLE );
}
else // Rx continuous mode
{
SX1276LR->RegFifoAddrPtr = SX1276LR->RegFifoRxBaseAddr;
SX1276Write( REG_LR_FIFOADDRPTR, SX1276LR->RegFifoAddrPtr );
SX1276LoRaSetOpMode( RFLR_OPMODE_RECEIVER );
}
memset( RFBuffer, 0, ( size_t )RF_BUFFER_SIZE );
PacketTimeout = LoRaSettings.RxPacketTimeout;
RxTimeoutTimer = GET_TICK_COUNT( );
RFLRState = RFLR_STATE_RX_RUNNING;
break;
case RFLR_STATE_RX_RUNNING:
if( DIO0 == 1 ) // RxDone
{
RxTimeoutTimer = GET_TICK_COUNT( );
if( LoRaSettings.FreqHopOn == true )
{
SX1276Read( REG_LR_HOPCHANNEL, &SX1276LR->RegHopChannel );
SX1276LoRaSetRFFrequency( HoppingFrequencies[SX1276LR->RegHopChannel & RFLR_HOPCHANNEL_CHANNEL_MASK] );
}
// Clear Irq
SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_RXDONE );
RFLRState = RFLR_STATE_RX_DONE;
}
if( DIO2 == 1 ) // FHSS Changed Channel
{
RxTimeoutTimer = GET_TICK_COUNT( );
if( LoRaSettings.FreqHopOn == true )
{
SX1276Read( REG_LR_HOPCHANNEL, &SX1276LR->RegHopChannel );
SX1276LoRaSetRFFrequency( HoppingFrequencies[SX1276LR->RegHopChannel & RFLR_HOPCHANNEL_CHANNEL_MASK] );
}
// Clear Irq
SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL );
// Debug
RxGain = SX1276LoRaReadRxGain( );
}
if( LoRaSettings.RxSingleOn == true ) // Rx single mode
{
if( ( GET_TICK_COUNT( ) - RxTimeoutTimer ) > PacketTimeout )
{
RFLRState = RFLR_STATE_RX_TIMEOUT;
}
}
break;
case RFLR_STATE_RX_DONE:
SX1276Read( REG_LR_IRQFLAGS, &SX1276LR->RegIrqFlags );
if( ( SX1276LR->RegIrqFlags & RFLR_IRQFLAGS_PAYLOADCRCERROR ) == RFLR_IRQFLAGS_PAYLOADCRCERROR )
{
// Clear Irq
SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_PAYLOADCRCERROR );
if( LoRaSettings.RxSingleOn == true ) // Rx single mode
{
RFLRState = RFLR_STATE_RX_INIT;
}
else
{
RFLRState = RFLR_STATE_RX_RUNNING;
}
break;
}
{
uint8_t rxSnrEstimate;
SX1276Read( REG_LR_PKTSNRVALUE, &rxSnrEstimate );
if( rxSnrEstimate & 0x80 ) // The SNR sign bit is 1
{
// Invert and divide by 4
RxPacketSnrEstimate = ( ( ~rxSnrEstimate + 1 ) & 0xFF ) >> 2;
RxPacketSnrEstimate = -RxPacketSnrEstimate;
}
else
{
// Divide by 4
RxPacketSnrEstimate = ( rxSnrEstimate & 0xFF ) >> 2;
}
}
uint8_t SX1276ReadRxGain( void )
{
return SX1276LoRaReadRxGain( );
}
