void SX1276LoRaInit( void )
{
SX1276LoRaSetOpMode( RFLR_OPMODE_SLEEP );
SX1276LoRaSetDefaults( );
SX1276ReadBuffer( 0x1,&SX1276LR, 0x70 - 1 );
SX1276Read( REG_LR_VERSION, &SX1276LR.RegVersion );
// set the RF settings
SX1276LoRaSetRFFrequency( LoRaSettings.RFFrequency,&SX1276LR );
SX1276LoRaSetRFPower_2( LoRaSettings.Power,&SX1276LR );
SX1276LoRaSetSpreadingFactor( LoRaSettings.SpreadingFactor,&SX1276LR ); // SF6 only operates in implicit header mode.
SX1276LoRaSetErrorCoding( LoRaSettings.ErrorCoding,&SX1276LR );
SX1276LoRaSetPacketCrcOn( LoRaSettings.CrcOn,&SX1276LR );
SX1276LoRaSetSignalBandwidth( LoRaSettings.SignalBw,&SX1276LR );
SX1276LoRaSetImplicitHeaderOn( LoRaSettings.ImplicitHeaderOn,&SX1276LR );
SX1276LoRaSetSymbTimeout( 0x3FF,&SX1276LR ); //Maximum - casove okno pro hledani preamble v single rezimu
SX1276LoRaSetPayloadLength( LoRaSettings.PayloadLength,&SX1276LR ); //
// SX1276LoRaSetLowDatarateOptimize( true,&SX1276LR ); //dela problemy - u delsiho paketu je rozsypany caj
/*AGC AUTO*/
SX1276Read( REG_LR_MODEMCONFIG3,&SX1276LR.RegModemConfig3 );
SX1276LR.RegModemConfig3|=0x4;
SX1276Write( REG_LR_MODEMCONFIG3,SX1276LR.RegModemConfig3 );
SX1276LoRaSetOpMode( RFLR_OPMODE_STANDBY );
}
void SX1276LoRaSetDefaults( void )
{
//See app note
if (LoRaSettings.SignalBw<9) //mensi nez 500
{
SX1276Read( 0x31, &SX1276LR.RegTestReserved31 );
// Sets IF frequency selection manual
SX1276LR.RegTestReserved31 &= 0x7F; // pro pasmo krome 5000 khz musime vycistiti bit 7
SX1276LR.RegTestReserved31 &=~ 0x80; //7 bit vznulovat
SX1276Write( 0x31, SX1276LR.RegTestReserved31 );
}else
{
SX1276Read( 0x31, &SX1276LR.RegTestReserved31 );
// Sets IF frequency selection manual
SX1276LR.RegTestReserved31 &= 0x7F; // pro pasmo krome 5000 khz musime vycistiti bit 7
SX1276LR.RegTestReserved31 |= 0x80; //7 bit set
SX1276Write( 0x31, SX1276LR.RegTestReserved31 );
SX1276Write( 0x36, 0x2); //See Erata
SX1276Write( 0x3a, 0x64); //See Erata
}
if(LoRaSettings.SignalBw==0) SX1276Write( 0x2F, 0x48 );
if((LoRaSettings.SignalBw>=0)&&(LoRaSettings.SignalBw<=5)) SX1276Write( 0x2F, 0x44 );
if((LoRaSettings.SignalBw>=6)&&(LoRaSettings.SignalBw<=8)) SX1276Write( 0x2F, 0x40 );
// SX1276Write( 0x2F, 0x40 );
SX1276Read( 0x30, &SX1276LR.RegTestReserved31 );
SX1276LR.RegTestReserved31&=0xFE;
SX1276Write( 0x30, SX1276LR.RegTestReserved31 );
}
void start_continuous_mode(void)
{
//4、BitSyncOn
//5、continuous mode
//6、RX
u8 RegDioMapping[2];
u8 temp;
SX1276FskSetOpMode(RF_OPMODE_STANDBY);
hal_DIOx_ITConfig(all,DISABLE);
RegDioMapping[0] = RF_DIOMAPPING1_DIO0_11 | RF_DIOMAPPING1_DIO1_00 | RF_DIOMAPPING1_DIO2_11 | RF_DIOMAPPING1_DIO3_10;
RegDioMapping[1] = RF_DIOMAPPING2_DIO4_00 | RF_DIOMAPPING2_DIO5_11 | RF_DIOMAPPING2_MAP_PREAMBLEDETECT;
SX1276WriteBuffer( REG_DIOMAPPING1, RegDioMapping, 2 );
SX1276Read(REG_OOKPEAK, &temp);
temp |= (0x20);
SX1276Write(REG_OOKPEAK, temp);
SX1276Read(REG_PACKETCONFIG2, &temp);
temp &= (~0x40);
SX1276Write(REG_PACKETCONFIG2, temp);
SX1276FskSetOpMode(RF_OPMODE_RECEIVER);
}
double SX1276LoRaReadRssi( void )
{
// Reads the RSSI value
SX1276Read( REG_LR_RSSIVALUE, &SX1276LR.RegRssiValue );
return RssiOffset[LoRaSettings.SignalBw] + ( double )SX1276LR.RegRssiValue;
}
void SX1276LoRaSetOpMode( uint8_t opMode )
{
static uint8_t opModePrev = RFLR_OPMODE_STANDBY;
bool antennaSwitchTxOn = false;
opModePrev = SX1276LR.RegOpMode & ~RFLR_OPMODE_MASK;
if( opMode == RFLR_OPMODE_TRANSMITTER )
{
antennaSwitchTxOn = true;
}
else
{
antennaSwitchTxOn = false;
}
//RXTX( antennaSwitchTxOn ); // Antenna switch control
SX1276LR.RegOpMode = ( SX1276LR.RegOpMode & RFLR_OPMODE_MASK ) | opMode;
SX1276Read( REG_LR_OPMODE, SX1276LR.RegOpMode );
SX1276LR.RegOpMode = ( SX1276LR.RegOpMode & RFLR_OPMODE_MASK ) | opMode;
SX1276Write( REG_LR_OPMODE, SX1276LR.RegOpMode );
}
double SX1276LoRaReadRssi( void )
{
// Reads the RSSI value
SX1276Read( REG_LR_RSSIVALUE, &SX1276LR->RegRssiValue );
if( LoRaSettings.RFFrequency < 860000000 ) // LF
{
return RSSI_OFFSET_LF + ( double )SX1276LR->RegRssiValue;
}
else
{
return RSSI_OFFSET_HF + ( double )SX1276LR->RegRssiValue;
}
}
void SX1276Init( void )
{
SX1276InitIo( );
SX1276Reset( );
static uint8_t temp=0;
SX1276Read( REG_LR_VERSION, &temp );
//SX1276Write( REG_LR_OPMODE, 0x09 );
SX1276SetLoRaOn();
// Initialize LoRa modem
SX1276LoRaInit( );
}
double SX1276FskReadRssi( void )
{
SX1276Read( REG_RSSIVALUE, &SX1276.RegRssiValue ); // Reads the RSSI value
return -( double )( ( double )SX1276.RegRssiValue / 2.0 );
}
uint8_t SX1276FskReadRxGain( void )
{
SX1276Read( REG_LNA, &SX1276.RegLna );
return( SX1276.RegLna >> 5 ) & 0x07;
}
uint8_t SX1276FskGetOpMode( void )
{
SX1276Read( REG_OPMODE, &SX1276.RegOpMode );
return SX1276.RegOpMode & ~RF_OPMODE_MASK;
}
void SX1276FskSetDefaults( void )
{
// REMARK: See SX1276 datasheet for modified default values.
SX1276Read( REG_VERSION, &SX1276.RegVersion );
}
/*!
* \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 SX1276LoRaReadRxGain( void )
{
SX1276Read( REG_LR_LNA, &SX1276LR->RegLna );
return( SX1276LR->RegLna >> 5 ) & 0x07;
}
uint8_t SX1276LoRaGetOpMode( void )
{
SX1276Read( REG_LR_OPMODE, &SX1276LR->RegOpMode );
return SX1276LR->RegOpMode & ~RFLR_OPMODE_MASK;
}
