Lukas Formanek
use with LoRa Access Point
sx1276/sx1276.cpp
- Committer:
- lukas_formanek
- Date:
- 2018-04-18
- Revision:
- 30:9b08b16f99e5
- Parent:
- 27:d09a8ef807e2
File content as of revision 30:9b08b16f99e5:
/*
/ _____) _ | |
( (____ _____ ____ _| |_ _____ ____| |__
\____ \| ___ | (_ _) ___ |/ ___) _ \
_____) ) ____| | | || |_| ____( (___| | | |
(______/|_____)_|_|_| \__)_____)\____)_| |_|
(C) 2014 Semtech
Description: Actual implementation of a SX1276 radio, inherits Radio
License: Revised BSD License, see LICENSE.TXT file include in the project
Maintainers: Miguel Luis, Gregory Cristian and Nicolas Huguenin
*/
#include "sx1276.h"
const FskBandwidth_t SX1276::FskBandwidths[] =
{
{ 2600 , 0x17 },
{ 3100 , 0x0F },
{ 3900 , 0x07 },
{ 5200 , 0x16 },
{ 6300 , 0x0E },
{ 7800 , 0x06 },
{ 10400 , 0x15 },
{ 12500 , 0x0D },
{ 15600 , 0x05 },
{ 20800 , 0x14 },
{ 25000 , 0x0C },
{ 31300 , 0x04 },
{ 41700 , 0x13 },
{ 50000 , 0x0B },
{ 62500 , 0x03 },
{ 83333 , 0x12 },
{ 100000, 0x0A },
{ 125000, 0x02 },
{ 166700, 0x11 },
{ 200000, 0x09 },
{ 250000, 0x01 },
{ 300000, 0x00 }, // Invalid Bandwidth
};
SX1276::SX1276( RadioEvents_t *events,
PinName mosi, PinName miso, PinName sclk, PinName nss, PinName reset,
PinName dio0, PinName dio1, PinName dio2, PinName dio3, PinName dio4, PinName dio5 )
: Radio( events ),
spi( mosi, miso, sclk ),
nss( nss ),
reset( reset ),
dio0( dio0 ), dio1( dio1 ), dio2( dio2 ), dio3( dio3 ), dio4( dio4 ), dio5( dio5 ),
isRadioActive( false )
{
wait_ms( 10 );
this->rxtxBuffer = new uint8_t[RX_BUFFER_SIZE];
this->RadioEvents = events;
this->dioIrq = new DioIrqHandler[6];
this->dioIrq[0] = &SX1276::OnDio0Irq;
this->dioIrq[1] = &SX1276::OnDio1Irq;
this->dioIrq[2] = &SX1276::OnDio2Irq;
this->dioIrq[3] = &SX1276::OnDio3Irq;
this->dioIrq[4] = &SX1276::OnDio4Irq;
this->dioIrq[5] = NULL;
this->settings.State = RF_IDLE;
}
SX1276::~SX1276( )
{
delete this->rxtxBuffer;
delete this->dioIrq;
}
void SX1276::Init( RadioEvents_t *events )
{
this->RadioEvents = events;
}
RadioState SX1276::GetStatus( void )
{
return this->settings.State;
}
void SX1276::SetChannel( uint32_t freq )
{
this->settings.Channel = freq;
freq = ( uint32_t )( ( double )freq / ( double )FREQ_STEP );
Write( REG_FRFMSB, ( uint8_t )( ( freq >> 16 ) & 0xFF ) );
Write( REG_FRFMID, ( uint8_t )( ( freq >> 8 ) & 0xFF ) );
Write( REG_FRFLSB, ( uint8_t )( freq & 0xFF ) );
}
bool SX1276::IsChannelFree( RadioModems_t modem, uint32_t freq, int16_t rssiThresh )
{
int16_t rssi = 0;
SetModem( modem );
SetChannel( freq );
SetOpMode( RF_OPMODE_RECEIVER );
wait_ms( 1 );
rssi = GetRssi( modem );
Sleep( );
if( rssi > rssiThresh )
{
return false;
}
return true;
}
uint32_t SX1276::Random( void )
{
uint8_t i;
uint32_t rnd = 0;
/*
* Radio setup for random number generation
*/
// Set LoRa modem ON
SetModem( MODEM_LORA );
// Disable LoRa modem interrupts
Write( REG_LR_IRQFLAGSMASK, RFLR_IRQFLAGS_RXTIMEOUT |
RFLR_IRQFLAGS_RXDONE |
RFLR_IRQFLAGS_PAYLOADCRCERROR |
RFLR_IRQFLAGS_VALIDHEADER |
RFLR_IRQFLAGS_TXDONE |
RFLR_IRQFLAGS_CADDONE |
RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
RFLR_IRQFLAGS_CADDETECTED );
// Set radio in continuous reception
SetOpMode( RF_OPMODE_RECEIVER );
for( i = 0; i < 32; i++ )
{
wait_ms( 1 );
// Unfiltered RSSI value reading. Only takes the LSB value
rnd |= ( ( uint32_t )Read( REG_LR_RSSIWIDEBAND ) & 0x01 ) << i;
}
Sleep( );
return rnd;
}
/*!
* Performs the Rx chain calibration for LF and HF bands
* \remark Must be called just after the reset so all registers are at their
* default values
*/
void SX1276::RxChainCalibration( void )
{
uint8_t regPaConfigInitVal;
uint32_t initialFreq;
// Save context
regPaConfigInitVal = this->Read( REG_PACONFIG );
initialFreq = ( double )( ( ( uint32_t )this->Read( REG_FRFMSB ) << 16 ) |
( ( uint32_t )this->Read( REG_FRFMID ) << 8 ) |
( ( uint32_t )this->Read( REG_FRFLSB ) ) ) * ( double )FREQ_STEP;
// Cut the PA just in case, RFO output, power = -1 dBm
this->Write( REG_PACONFIG, 0x00 );
// Launch Rx chain calibration for LF band
Write ( REG_IMAGECAL, ( Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_MASK ) | RF_IMAGECAL_IMAGECAL_START );
while( ( Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_RUNNING ) == RF_IMAGECAL_IMAGECAL_RUNNING )
{
}
// Sets a Frequency in HF band
SetChannel( 868000000 );
// Launch Rx chain calibration for HF band
Write ( REG_IMAGECAL, ( Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_MASK ) | RF_IMAGECAL_IMAGECAL_START );
while( ( Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_RUNNING ) == RF_IMAGECAL_IMAGECAL_RUNNING )
{
}
// Restore context
this->Write( REG_PACONFIG, regPaConfigInitVal );
SetChannel( initialFreq );
}
/*!
* Returns the known FSK bandwidth registers value
*
* \param [IN] bandwidth Bandwidth value in Hz
* \retval regValue Bandwidth register value.
*/
uint8_t SX1276::GetFskBandwidthRegValue( uint32_t bandwidth )
{
uint8_t i;
for( i = 0; i < ( sizeof( FskBandwidths ) / sizeof( FskBandwidth_t ) ) - 1; i++ )
{
if( ( bandwidth >= FskBandwidths[i].bandwidth ) && ( bandwidth < FskBandwidths[i + 1].bandwidth ) )
{
return FskBandwidths[i].RegValue;
}
}
// ERROR: Value not found
while( 1 );
}
void SX1276::SetRxConfig( RadioModems_t modem, uint32_t bandwidth,
uint32_t datarate, uint8_t coderate,
uint32_t bandwidthAfc, uint16_t preambleLen,
uint16_t symbTimeout, bool fixLen,
uint8_t payloadLen,
bool crcOn, bool freqHopOn, uint8_t hopPeriod,
bool iqInverted, bool rxContinuous )
{
SetModem( modem );
switch( modem )
{
case MODEM_FSK:
{
this->settings.Fsk.Bandwidth = bandwidth;
this->settings.Fsk.Datarate = datarate;
this->settings.Fsk.BandwidthAfc = bandwidthAfc;
this->settings.Fsk.FixLen = fixLen;
this->settings.Fsk.PayloadLen = payloadLen;
this->settings.Fsk.CrcOn = crcOn;
this->settings.Fsk.IqInverted = iqInverted;
this->settings.Fsk.RxContinuous = rxContinuous;
this->settings.Fsk.PreambleLen = preambleLen;
this->settings.Fsk.RxSingleTimeout = symbTimeout * ( ( 1.0 / ( double )datarate ) * 8.0 ) * 1e3;
datarate = ( uint16_t )( ( double )XTAL_FREQ / ( double )datarate );
Write( REG_BITRATEMSB, ( uint8_t )( datarate >> 8 ) );
Write( REG_BITRATELSB, ( uint8_t )( datarate & 0xFF ) );
Write( REG_RXBW, GetFskBandwidthRegValue( bandwidth ) );
Write( REG_AFCBW, GetFskBandwidthRegValue( bandwidthAfc ) );
Write( REG_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) );
Write( REG_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) );
if( fixLen == 1 )
{
Write( REG_PAYLOADLENGTH, payloadLen );
}
else
{
Write( REG_PAYLOADLENGTH, 0xFF ); // Set payload length to the maximum
}
Write( REG_PACKETCONFIG1,
( Read( REG_PACKETCONFIG1 ) &
RF_PACKETCONFIG1_CRC_MASK &
RF_PACKETCONFIG1_PACKETFORMAT_MASK ) |
( ( fixLen == 1 ) ? RF_PACKETCONFIG1_PACKETFORMAT_FIXED : RF_PACKETCONFIG1_PACKETFORMAT_VARIABLE ) |
( crcOn << 4 ) );
Write( REG_PACKETCONFIG2, ( Read( REG_PACKETCONFIG2 ) | RF_PACKETCONFIG2_DATAMODE_PACKET ) );
}
break;
case MODEM_LORA:
{
if( bandwidth > 2 )
{
// Fatal error: When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported
while( 1 );
}
bandwidth += 7;
this->settings.LoRa.Bandwidth = bandwidth;
this->settings.LoRa.Datarate = datarate;
this->settings.LoRa.Coderate = coderate;
this->settings.LoRa.PreambleLen = preambleLen;
this->settings.LoRa.FixLen = fixLen;
this->settings.LoRa.PayloadLen = payloadLen;
this->settings.LoRa.CrcOn = crcOn;
this->settings.LoRa.FreqHopOn = freqHopOn;
this->settings.LoRa.HopPeriod = hopPeriod;
this->settings.LoRa.IqInverted = iqInverted;
this->settings.LoRa.RxContinuous = rxContinuous;
if( datarate > 12 )
{
datarate = 12;
}
else if( datarate < 6 )
{
datarate = 6;
}
if( ( ( bandwidth == 7 ) && ( ( datarate == 11 ) || ( datarate == 12 ) ) ) ||
( ( bandwidth == 8 ) && ( datarate == 12 ) ) )
{
this->settings.LoRa.LowDatarateOptimize = 0x01;
}
else
{
this->settings.LoRa.LowDatarateOptimize = 0x00;
}
Write( REG_LR_MODEMCONFIG1,
( Read( REG_LR_MODEMCONFIG1 ) &
RFLR_MODEMCONFIG1_BW_MASK &
RFLR_MODEMCONFIG1_CODINGRATE_MASK &
RFLR_MODEMCONFIG1_IMPLICITHEADER_MASK ) |
( bandwidth << 4 ) | ( coderate << 1 ) |
fixLen );
Write( REG_LR_MODEMCONFIG2,
( Read( REG_LR_MODEMCONFIG2 ) &
RFLR_MODEMCONFIG2_SF_MASK &
RFLR_MODEMCONFIG2_RXPAYLOADCRC_MASK &
RFLR_MODEMCONFIG2_SYMBTIMEOUTMSB_MASK ) |
( datarate << 4 ) | ( crcOn << 2 ) |
( ( symbTimeout >> 8 ) & ~RFLR_MODEMCONFIG2_SYMBTIMEOUTMSB_MASK ) );
Write( REG_LR_MODEMCONFIG3,
( Read( REG_LR_MODEMCONFIG3 ) &
RFLR_MODEMCONFIG3_LOWDATARATEOPTIMIZE_MASK ) |
( this->settings.LoRa.LowDatarateOptimize << 3 ) );
Write( REG_LR_SYMBTIMEOUTLSB, ( uint8_t )( symbTimeout & 0xFF ) );
Write( REG_LR_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) );
Write( REG_LR_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) );
if( fixLen == 1 )
{
Write( REG_LR_PAYLOADLENGTH, payloadLen );
}
if( this->settings.LoRa.FreqHopOn == true )
{
Write( REG_LR_PLLHOP, ( Read( REG_LR_PLLHOP ) & RFLR_PLLHOP_FASTHOP_MASK ) | RFLR_PLLHOP_FASTHOP_ON );
Write( REG_LR_HOPPERIOD, this->settings.LoRa.HopPeriod );
}
if( ( bandwidth == 9 ) && ( this->settings.Channel > RF_MID_BAND_THRESH ) )
{
// ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
Write( REG_LR_TEST36, 0x02 );
Write( REG_LR_TEST3A, 0x64 );
}
else if( bandwidth == 9 )
{
// ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
Write( REG_LR_TEST36, 0x02 );
Write( REG_LR_TEST3A, 0x7F );
}
else
{
// ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
Write( REG_LR_TEST36, 0x03 );
}
if( datarate == 6 )
{
Write( REG_LR_DETECTOPTIMIZE,
( Read( REG_LR_DETECTOPTIMIZE ) &
RFLR_DETECTIONOPTIMIZE_MASK ) |
RFLR_DETECTIONOPTIMIZE_SF6 );
Write( REG_LR_DETECTIONTHRESHOLD,
RFLR_DETECTIONTHRESH_SF6 );
}
else
{
Write( REG_LR_DETECTOPTIMIZE,
( Read( REG_LR_DETECTOPTIMIZE ) &
RFLR_DETECTIONOPTIMIZE_MASK ) |
RFLR_DETECTIONOPTIMIZE_SF7_TO_SF12 );
Write( REG_LR_DETECTIONTHRESHOLD,
RFLR_DETECTIONTHRESH_SF7_TO_SF12 );
}
}
break;
}
}
void SX1276::SetTxConfig( RadioModems_t modem, int8_t power, uint32_t fdev,
uint32_t bandwidth, uint32_t datarate,
uint8_t coderate, uint16_t preambleLen,
bool fixLen, bool crcOn, bool freqHopOn,
uint8_t hopPeriod, bool iqInverted, uint32_t timeout )
{
SetModem( modem );
SetRfTxPower( power );
switch( modem )
{
case MODEM_FSK:
{
this->settings.Fsk.Power = power;
this->settings.Fsk.Fdev = fdev;
this->settings.Fsk.Bandwidth = bandwidth;
this->settings.Fsk.Datarate = datarate;
this->settings.Fsk.PreambleLen = preambleLen;
this->settings.Fsk.FixLen = fixLen;
this->settings.Fsk.CrcOn = crcOn;
this->settings.Fsk.IqInverted = iqInverted;
this->settings.Fsk.TxTimeout = timeout;
fdev = ( uint16_t )( ( double )fdev / ( double )FREQ_STEP );
Write( REG_FDEVMSB, ( uint8_t )( fdev >> 8 ) );
Write( REG_FDEVLSB, ( uint8_t )( fdev & 0xFF ) );
datarate = ( uint16_t )( ( double )XTAL_FREQ / ( double )datarate );
Write( REG_BITRATEMSB, ( uint8_t )( datarate >> 8 ) );
Write( REG_BITRATELSB, ( uint8_t )( datarate & 0xFF ) );
Write( REG_PREAMBLEMSB, ( preambleLen >> 8 ) & 0x00FF );
Write( REG_PREAMBLELSB, preambleLen & 0xFF );
Write( REG_PACKETCONFIG1,
( Read( REG_PACKETCONFIG1 ) &
RF_PACKETCONFIG1_CRC_MASK &
RF_PACKETCONFIG1_PACKETFORMAT_MASK ) |
( ( fixLen == 1 ) ? RF_PACKETCONFIG1_PACKETFORMAT_FIXED : RF_PACKETCONFIG1_PACKETFORMAT_VARIABLE ) |
( crcOn << 4 ) );
Write( REG_PACKETCONFIG2, ( Read( REG_PACKETCONFIG2 ) | RF_PACKETCONFIG2_DATAMODE_PACKET ) );
}
break;
case MODEM_LORA:
{
this->settings.LoRa.Power = power;
if( bandwidth > 2 )
{
// Fatal error: When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported
while( 1 );
}
bandwidth += 7;
this->settings.LoRa.Bandwidth = bandwidth;
this->settings.LoRa.Datarate = datarate;
this->settings.LoRa.Coderate = coderate;
this->settings.LoRa.PreambleLen = preambleLen;
this->settings.LoRa.FixLen = fixLen;
this->settings.LoRa.FreqHopOn = freqHopOn;
this->settings.LoRa.HopPeriod = hopPeriod;
this->settings.LoRa.CrcOn = crcOn;
this->settings.LoRa.IqInverted = iqInverted;
this->settings.LoRa.TxTimeout = timeout;
if( datarate > 12 )
{
datarate = 12;
}
else if( datarate < 6 )
{
datarate = 6;
}
if( ( ( bandwidth == 7 ) && ( ( datarate == 11 ) || ( datarate == 12 ) ) ) ||
( ( bandwidth == 8 ) && ( datarate == 12 ) ) )
{
this->settings.LoRa.LowDatarateOptimize = 0x01;
}
else
{
this->settings.LoRa.LowDatarateOptimize = 0x00;
}
if( this->settings.LoRa.FreqHopOn == true )
{
Write( REG_LR_PLLHOP, ( Read( REG_LR_PLLHOP ) & RFLR_PLLHOP_FASTHOP_MASK ) | RFLR_PLLHOP_FASTHOP_ON );
Write( REG_LR_HOPPERIOD, this->settings.LoRa.HopPeriod );
}
Write( REG_LR_MODEMCONFIG1,
( Read( REG_LR_MODEMCONFIG1 ) &
RFLR_MODEMCONFIG1_BW_MASK &
RFLR_MODEMCONFIG1_CODINGRATE_MASK &
RFLR_MODEMCONFIG1_IMPLICITHEADER_MASK ) |
( bandwidth << 4 ) | ( coderate << 1 ) |
fixLen );
Write( REG_LR_MODEMCONFIG2,
( Read( REG_LR_MODEMCONFIG2 ) &
RFLR_MODEMCONFIG2_SF_MASK &
RFLR_MODEMCONFIG2_RXPAYLOADCRC_MASK ) |
( datarate << 4 ) | ( crcOn << 2 ) );
Write( REG_LR_MODEMCONFIG3,
( Read( REG_LR_MODEMCONFIG3 ) &
RFLR_MODEMCONFIG3_LOWDATARATEOPTIMIZE_MASK ) |
( this->settings.LoRa.LowDatarateOptimize << 3 ) );
Write( REG_LR_PREAMBLEMSB, ( preambleLen >> 8 ) & 0x00FF );
Write( REG_LR_PREAMBLELSB, preambleLen & 0xFF );
if( datarate == 6 )
{
Write( REG_LR_DETECTOPTIMIZE,
( Read( REG_LR_DETECTOPTIMIZE ) &
RFLR_DETECTIONOPTIMIZE_MASK ) |
RFLR_DETECTIONOPTIMIZE_SF6 );
Write( REG_LR_DETECTIONTHRESHOLD,
RFLR_DETECTIONTHRESH_SF6 );
}
else
{
Write( REG_LR_DETECTOPTIMIZE,
( Read( REG_LR_DETECTOPTIMIZE ) &
RFLR_DETECTIONOPTIMIZE_MASK ) |
RFLR_DETECTIONOPTIMIZE_SF7_TO_SF12 );
Write( REG_LR_DETECTIONTHRESHOLD,
RFLR_DETECTIONTHRESH_SF7_TO_SF12 );
}
}
break;
}
}
uint32_t SX1276::TimeOnAir( RadioModems_t modem, uint8_t pktLen )
{
uint32_t airTime = 0;
switch( modem )
{
case MODEM_FSK:
{
airTime = rint( ( 8 * ( this->settings.Fsk.PreambleLen +
( ( Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1 ) +
( ( this->settings.Fsk.FixLen == 0x01 ) ? 0.0 : 1.0 ) +
( ( ( Read( REG_PACKETCONFIG1 ) & ~RF_PACKETCONFIG1_ADDRSFILTERING_MASK ) != 0x00 ) ? 1.0 : 0 ) +
pktLen +
( ( this->settings.Fsk.CrcOn == 0x01 ) ? 2.0 : 0 ) ) /
this->settings.Fsk.Datarate ) * 1e3 );
}
break;
case MODEM_LORA:
{
double bw = 0.0;
// REMARK: When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported
switch( this->settings.LoRa.Bandwidth )
{
//case 0: // 7.8 kHz
// bw = 78e2;
// break;
//case 1: // 10.4 kHz
// bw = 104e2;
// break;
//case 2: // 15.6 kHz
// bw = 156e2;
// break;
//case 3: // 20.8 kHz
// bw = 208e2;
// break;
//case 4: // 31.2 kHz
// bw = 312e2;
// break;
//case 5: // 41.4 kHz
// bw = 414e2;
// break;
//case 6: // 62.5 kHz
// bw = 625e2;
// break;
case 7: // 125 kHz
bw = 125e3;
break;
case 8: // 250 kHz
bw = 250e3;
break;
case 9: // 500 kHz
bw = 500e3;
break;
}
// Symbol rate : time for one symbol (secs)
double rs = bw / ( 1 << this->settings.LoRa.Datarate );
double ts = 1 / rs;
// time of preamble
double tPreamble = ( this->settings.LoRa.PreambleLen + 4.25 ) * ts;
// Symbol length of payload and time
double tmp = ceil( ( 8 * pktLen - 4 * this->settings.LoRa.Datarate +
28 + 16 * this->settings.LoRa.CrcOn -
( this->settings.LoRa.FixLen ? 20 : 0 ) ) /
( double )( 4 * ( this->settings.LoRa.Datarate -
( ( this->settings.LoRa.LowDatarateOptimize > 0 ) ? 2 : 0 ) ) ) ) *
( this->settings.LoRa.Coderate + 4 );
double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
double tPayload = nPayload * ts;
// Time on air
double tOnAir = tPreamble + tPayload;
// return ms secs
airTime = floor( tOnAir * 1e3 + 0.999 );
}
break;
}
return airTime;
}
void SX1276::Send( uint8_t *buffer, uint8_t size )
{
uint32_t txTimeout = 0;
switch( this->settings.Modem )
{
case MODEM_FSK:
{
this->settings.FskPacketHandler.NbBytes = 0;
this->settings.FskPacketHandler.Size = size;
if( this->settings.Fsk.FixLen == false )
{
WriteFifo( ( uint8_t* )&size, 1 );
}
else
{
Write( REG_PAYLOADLENGTH, size );
}
if( ( size > 0 ) && ( size <= 64 ) )
{
this->settings.FskPacketHandler.ChunkSize = size;
}
else
{
memcpy( rxtxBuffer, buffer, size );
this->settings.FskPacketHandler.ChunkSize = 32;
}
// Write payload buffer
WriteFifo( buffer, this->settings.FskPacketHandler.ChunkSize );
this->settings.FskPacketHandler.NbBytes += this->settings.FskPacketHandler.ChunkSize;
txTimeout = this->settings.Fsk.TxTimeout;
}
break;
case MODEM_LORA:
{
if( this->settings.LoRa.IqInverted == true )
{
Write( REG_LR_INVERTIQ, ( ( Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_ON ) );
Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_ON );
}
else
{
Write( REG_LR_INVERTIQ, ( ( Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_OFF ) );
Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_OFF );
}
this->settings.LoRaPacketHandler.Size = size;
// Initializes the payload size
Write( REG_LR_PAYLOADLENGTH, size );
// Full buffer used for Tx
Write( REG_LR_FIFOTXBASEADDR, 0 );
Write( REG_LR_FIFOADDRPTR, 0 );
// FIFO operations can not take place in Sleep mode
if( ( Read( REG_OPMODE ) & ~RF_OPMODE_MASK ) == RF_OPMODE_SLEEP )
{
Standby( );
wait_ms( 1 );
}
// Write payload buffer
WriteFifo( buffer, size );
txTimeout = this->settings.LoRa.TxTimeout;
}
break;
}
Tx( txTimeout );
}
void SX1276::Sleep( void )
{
txTimeoutTimer.detach( );
rxTimeoutTimer.detach( );
SetOpMode( RF_OPMODE_SLEEP );
this->settings.State = RF_IDLE;
}
void SX1276::Standby( void )
{
txTimeoutTimer.detach( );
rxTimeoutTimer.detach( );
SetOpMode( RF_OPMODE_STANDBY );
this->settings.State = RF_IDLE;
}
void SX1276::Rx( uint32_t timeout )
{
bool rxContinuous = false;
switch( this->settings.Modem )
{
case MODEM_FSK:
{
rxContinuous = this->settings.Fsk.RxContinuous;
// DIO0=PayloadReady
// DIO1=FifoLevel
// DIO2=SyncAddr
// DIO3=FifoEmpty
// DIO4=Preamble
// DIO5=ModeReady
Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RF_DIOMAPPING1_DIO0_MASK &
RF_DIOMAPPING1_DIO1_MASK &
RF_DIOMAPPING1_DIO2_MASK ) |
RF_DIOMAPPING1_DIO0_00 |
RF_DIOMAPPING1_DIO1_00 |
RF_DIOMAPPING1_DIO2_11 );
Write( REG_DIOMAPPING2, ( Read( REG_DIOMAPPING2 ) & RF_DIOMAPPING2_DIO4_MASK &
RF_DIOMAPPING2_MAP_MASK ) |
RF_DIOMAPPING2_DIO4_11 |
RF_DIOMAPPING2_MAP_PREAMBLEDETECT );
this->settings.FskPacketHandler.FifoThresh = Read( REG_FIFOTHRESH ) & 0x3F;
Write( REG_RXCONFIG, RF_RXCONFIG_AFCAUTO_ON | RF_RXCONFIG_AGCAUTO_ON | RF_RXCONFIG_RXTRIGER_PREAMBLEDETECT );
this->settings.FskPacketHandler.PreambleDetected = false;
this->settings.FskPacketHandler.SyncWordDetected = false;
this->settings.FskPacketHandler.NbBytes = 0;
this->settings.FskPacketHandler.Size = 0;
}
break;
case MODEM_LORA:
{
if( this->settings.LoRa.IqInverted == true )
{
Write( REG_LR_INVERTIQ, ( ( Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_ON | RFLR_INVERTIQ_TX_OFF ) );
Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_ON );
}
else
{
Write( REG_LR_INVERTIQ, ( ( Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_OFF ) );
Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_OFF );
}
// ERRATA 2.3 - Receiver Spurious Reception of a LoRa Signal
if( this->settings.LoRa.Bandwidth < 9 )
{
Write( REG_LR_DETECTOPTIMIZE, Read( REG_LR_DETECTOPTIMIZE ) & 0x7F );
Write( REG_LR_TEST30, 0x00 );
switch( this->settings.LoRa.Bandwidth )
{
case 0: // 7.8 kHz
Write( REG_LR_TEST2F, 0x48 );
SetChannel(this->settings.Channel + 7.81e3 );
break;
case 1: // 10.4 kHz
Write( REG_LR_TEST2F, 0x44 );
SetChannel(this->settings.Channel + 10.42e3 );
break;
case 2: // 15.6 kHz
Write( REG_LR_TEST2F, 0x44 );
SetChannel(this->settings.Channel + 15.62e3 );
break;
case 3: // 20.8 kHz
Write( REG_LR_TEST2F, 0x44 );
SetChannel(this->settings.Channel + 20.83e3 );
break;
case 4: // 31.2 kHz
Write( REG_LR_TEST2F, 0x44 );
SetChannel(this->settings.Channel + 31.25e3 );
break;
case 5: // 41.4 kHz
Write( REG_LR_TEST2F, 0x44 );
SetChannel(this->settings.Channel + 41.67e3 );
break;
case 6: // 62.5 kHz
Write( REG_LR_TEST2F, 0x40 );
break;
case 7: // 125 kHz
Write( REG_LR_TEST2F, 0x40 );
break;
case 8: // 250 kHz
Write( REG_LR_TEST2F, 0x40 );
break;
}
}
else
{
Write( REG_LR_DETECTOPTIMIZE, Read( REG_LR_DETECTOPTIMIZE ) | 0x80 );
}
rxContinuous = this->settings.LoRa.RxContinuous;
if( this->settings.LoRa.FreqHopOn == true )
{
Write( REG_LR_IRQFLAGSMASK, //RFLR_IRQFLAGS_RXTIMEOUT |
//RFLR_IRQFLAGS_RXDONE |
//RFLR_IRQFLAGS_PAYLOADCRCERROR |
RFLR_IRQFLAGS_VALIDHEADER |
RFLR_IRQFLAGS_TXDONE |
RFLR_IRQFLAGS_CADDONE |
//RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
RFLR_IRQFLAGS_CADDETECTED );
// DIO0=RxDone, DIO2=FhssChangeChannel
Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK & RFLR_DIOMAPPING1_DIO2_MASK ) | RFLR_DIOMAPPING1_DIO0_00 | RFLR_DIOMAPPING1_DIO2_00 );
}
else
{
Write( REG_LR_IRQFLAGSMASK, //RFLR_IRQFLAGS_RXTIMEOUT |
//RFLR_IRQFLAGS_RXDONE |
//RFLR_IRQFLAGS_PAYLOADCRCERROR |
RFLR_IRQFLAGS_VALIDHEADER |
RFLR_IRQFLAGS_TXDONE |
RFLR_IRQFLAGS_CADDONE |
RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
RFLR_IRQFLAGS_CADDETECTED );
// DIO0=RxDone
Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_00 );
}
Write( REG_LR_FIFORXBASEADDR, 0 );
Write( REG_LR_FIFOADDRPTR, 0 );
}
break;
}
memset( rxtxBuffer, 0, ( size_t )RX_BUFFER_SIZE );
this->settings.State = RF_RX_RUNNING;
if( timeout != 0 )
{
rxTimeoutTimer.attach_us( mbed::callback( this, &SX1276::OnTimeoutIrq ), timeout * 1e3 );
}
if( this->settings.Modem == MODEM_FSK )
{
SetOpMode( RF_OPMODE_RECEIVER );
if( rxContinuous == false )
{
rxTimeoutSyncWord.attach_us( mbed::callback( this, &SX1276::OnTimeoutIrq ),
this->settings.Fsk.RxSingleTimeout * 1e3 );
}
}
else
{
if( rxContinuous == true )
{
SetOpMode( RFLR_OPMODE_RECEIVER );
}
else
{
SetOpMode( RFLR_OPMODE_RECEIVER_SINGLE );
}
}
}
void SX1276::Tx( uint32_t timeout )
{
switch( this->settings.Modem )
{
case MODEM_FSK:
{
// DIO0=PacketSent
// DIO1=FifoEmpty
// DIO2=FifoFull
// DIO3=FifoEmpty
// DIO4=LowBat
// DIO5=ModeReady
Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RF_DIOMAPPING1_DIO0_MASK &
RF_DIOMAPPING1_DIO1_MASK &
RF_DIOMAPPING1_DIO2_MASK ) |
RF_DIOMAPPING1_DIO1_01 );
Write( REG_DIOMAPPING2, ( Read( REG_DIOMAPPING2 ) & RF_DIOMAPPING2_DIO4_MASK &
RF_DIOMAPPING2_MAP_MASK ) );
this->settings.FskPacketHandler.FifoThresh = Read( REG_FIFOTHRESH ) & 0x3F;
}
break;
case MODEM_LORA:
{
if( this->settings.LoRa.FreqHopOn == true )
{
Write( REG_LR_IRQFLAGSMASK, RFLR_IRQFLAGS_RXTIMEOUT |
RFLR_IRQFLAGS_RXDONE |
RFLR_IRQFLAGS_PAYLOADCRCERROR |
RFLR_IRQFLAGS_VALIDHEADER |
//RFLR_IRQFLAGS_TXDONE |
RFLR_IRQFLAGS_CADDONE |
//RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
RFLR_IRQFLAGS_CADDETECTED );
// DIO0=TxDone, DIO2=FhssChangeChannel
Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK & RFLR_DIOMAPPING1_DIO2_MASK ) | RFLR_DIOMAPPING1_DIO0_01 | RFLR_DIOMAPPING1_DIO2_00 );
}
else
{
Write( REG_LR_IRQFLAGSMASK, RFLR_IRQFLAGS_RXTIMEOUT |
RFLR_IRQFLAGS_RXDONE |
RFLR_IRQFLAGS_PAYLOADCRCERROR |
RFLR_IRQFLAGS_VALIDHEADER |
//RFLR_IRQFLAGS_TXDONE |
RFLR_IRQFLAGS_CADDONE |
RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL |
RFLR_IRQFLAGS_CADDETECTED );
// DIO0=TxDone
Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_01 );
}
}
break;
}
this->settings.State = RF_TX_RUNNING;
txTimeoutTimer.attach_us( mbed::callback( this, &SX1276::OnTimeoutIrq ), timeout * 1e3 );
SetOpMode( RF_OPMODE_TRANSMITTER );
}
void SX1276::StartCad( void )
{
switch( this->settings.Modem )
{
case MODEM_FSK:
{
}
break;
case MODEM_LORA:
{
Write( REG_LR_IRQFLAGSMASK, RFLR_IRQFLAGS_RXTIMEOUT |
RFLR_IRQFLAGS_RXDONE |
RFLR_IRQFLAGS_PAYLOADCRCERROR |
RFLR_IRQFLAGS_VALIDHEADER |
RFLR_IRQFLAGS_TXDONE |
//RFLR_IRQFLAGS_CADDONE |
RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL // |
//RFLR_IRQFLAGS_CADDETECTED
);
// DIO3=CADDone
Write( REG_DIOMAPPING1, ( Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO3_MASK ) | RFLR_DIOMAPPING1_DIO3_00 );
this->settings.State = RF_CAD;
SetOpMode( RFLR_OPMODE_CAD );
}
break;
default:
break;
}
}
void SX1276::SetTxContinuousWave( uint32_t freq, int8_t power, uint16_t time )
{
uint32_t timeout = ( uint32_t )( time * 1e6 );
SetChannel( freq );
SetTxConfig( MODEM_FSK, power, 0, 0, 4800, 0, 5, false, false, 0, 0, 0, timeout );
Write( REG_PACKETCONFIG2, ( Read( REG_PACKETCONFIG2 ) & RF_PACKETCONFIG2_DATAMODE_MASK ) );
// Disable radio interrupts
Write( REG_DIOMAPPING1, RF_DIOMAPPING1_DIO0_11 | RF_DIOMAPPING1_DIO1_11 );
Write( REG_DIOMAPPING2, RF_DIOMAPPING2_DIO4_10 | RF_DIOMAPPING2_DIO5_10 );
this->settings.State = RF_TX_RUNNING;
txTimeoutTimer.attach_us( mbed::callback( this, &SX1276::OnTimeoutIrq ), timeout );
SetOpMode( RF_OPMODE_TRANSMITTER );
}
int16_t SX1276::GetRssi( RadioModems_t modem )
{
int16_t rssi = 0;
switch( modem )
{
case MODEM_FSK:
rssi = -( Read( REG_RSSIVALUE ) >> 1 );
break;
case MODEM_LORA:
if( this->settings.Channel > RF_MID_BAND_THRESH )
{
rssi = RSSI_OFFSET_HF + Read( REG_LR_RSSIVALUE );
}
else
{
rssi = RSSI_OFFSET_LF + Read( REG_LR_RSSIVALUE );
}
break;
default:
rssi = -1;
break;
}
return rssi;
}
void SX1276::SetOpMode( uint8_t opMode )
{
if( opMode == RF_OPMODE_SLEEP )
{
SetAntSwLowPower( true );
}
else
{
SetAntSwLowPower( false );
SetAntSw( opMode );
}
Write( REG_OPMODE, ( Read( REG_OPMODE ) & RF_OPMODE_MASK ) | opMode );
}
void SX1276::SetModem( RadioModems_t modem )
{
if( ( Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_ON ) != 0 )
{
this->settings.Modem = MODEM_LORA;
}
else
{
this->settings.Modem = MODEM_FSK;
}
if( this->settings.Modem == modem )
{
return;
}
this->settings.Modem = modem;
switch( this->settings.Modem )
{
default:
case MODEM_FSK:
Sleep( );
Write( REG_OPMODE, ( Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_MASK ) | RFLR_OPMODE_LONGRANGEMODE_OFF );
Write( REG_DIOMAPPING1, 0x00 );
Write( REG_DIOMAPPING2, 0x30 ); // DIO5=ModeReady
break;
case MODEM_LORA:
Sleep( );
Write( REG_OPMODE, ( Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_MASK ) | RFLR_OPMODE_LONGRANGEMODE_ON );
Write( REG_DIOMAPPING1, 0x00 );
Write( REG_DIOMAPPING2, 0x00 );
break;
}
}
void SX1276::SetMaxPayloadLength( RadioModems_t modem, uint8_t max )
{
this->SetModem( modem );
switch( modem )
{
case MODEM_FSK:
if( this->settings.Fsk.FixLen == false )
{
this->Write( REG_PAYLOADLENGTH, max );
}
break;
case MODEM_LORA:
this->Write( REG_LR_PAYLOADMAXLENGTH, max );
break;
}
}
void SX1276::SetPublicNetwork( bool enable )
{
SetModem( MODEM_LORA );
this->settings.LoRa.PublicNetwork = enable;
if( enable == true )
{
// Change LoRa modem SyncWord
Write( REG_LR_SYNCWORD, LORA_MAC_PUBLIC_SYNCWORD );
}
else
{
// Change LoRa modem SyncWord
Write( REG_LR_SYNCWORD, LORA_MAC_PRIVATE_SYNCWORD );
}
}
void SX1276::OnTimeoutIrq( void )
{
switch( this->settings.State )
{
case RF_RX_RUNNING:
if( this->settings.Modem == MODEM_FSK )
{
this->settings.FskPacketHandler.PreambleDetected = false;
this->settings.FskPacketHandler.SyncWordDetected = false;
this->settings.FskPacketHandler.NbBytes = 0;
this->settings.FskPacketHandler.Size = 0;
// Clear Irqs
Write( REG_IRQFLAGS1, RF_IRQFLAGS1_RSSI |
RF_IRQFLAGS1_PREAMBLEDETECT |
RF_IRQFLAGS1_SYNCADDRESSMATCH );
Write( REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN );
if( this->settings.Fsk.RxContinuous == true )
{
// Continuous mode restart Rx chain
Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
rxTimeoutSyncWord.attach_us( mbed::callback( this, &SX1276::OnTimeoutIrq ),
this->settings.Fsk.RxSingleTimeout * 1e3 );
}
else
{
this->settings.State = RF_IDLE;
rxTimeoutSyncWord.detach( );
}
}
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxTimeout != NULL ) )
{
this->RadioEvents->RxTimeout( );
}
break;
case RF_TX_RUNNING:
// Tx timeout shouldn't happen.
// But it has been observed that when it happens it is a result of a corrupted SPI transfer
// it depends on the platform design.
//
// The workaround is to put the radio in a known state. Thus, we re-initialize it.
// BEGIN WORKAROUND
// Reset the radio
Reset( );
// Calibrate Rx chain
RxChainCalibration( );
// Initialize radio default values
SetOpMode( RF_OPMODE_SLEEP );
RadioRegistersInit( );
SetModem( MODEM_FSK );
// Restore previous network type setting.
SetPublicNetwork( this->settings.LoRa.PublicNetwork );
// END WORKAROUND
this->settings.State = RF_IDLE;
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->TxTimeout != NULL ) )
{
this->RadioEvents->TxTimeout( );
}
break;
default:
break;
}
}
void SX1276::OnDio0Irq( void )
{
volatile uint8_t irqFlags = 0;
switch( this->settings.State )
{
case RF_RX_RUNNING:
//TimerStop( &RxTimeoutTimer );
// RxDone interrupt
switch( this->settings.Modem )
{
case MODEM_FSK:
if( this->settings.Fsk.CrcOn == true )
{
irqFlags = Read( REG_IRQFLAGS2 );
if( ( irqFlags & RF_IRQFLAGS2_CRCOK ) != RF_IRQFLAGS2_CRCOK )
{
// Clear Irqs
Write( REG_IRQFLAGS1, RF_IRQFLAGS1_RSSI |
RF_IRQFLAGS1_PREAMBLEDETECT |
RF_IRQFLAGS1_SYNCADDRESSMATCH );
Write( REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN );
rxTimeoutTimer.detach( );
if( this->settings.Fsk.RxContinuous == false )
{
rxTimeoutSyncWord.detach( );
this->settings.State = RF_IDLE;
}
else
{
// Continuous mode restart Rx chain
Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
rxTimeoutSyncWord.attach_us( mbed::callback( this, &SX1276::OnTimeoutIrq ),
this->settings.Fsk.RxSingleTimeout * 1e3 );
}
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxError != NULL ) )
{
this->RadioEvents->RxError( );
}
this->settings.FskPacketHandler.PreambleDetected = false;
this->settings.FskPacketHandler.SyncWordDetected = false;
this->settings.FskPacketHandler.NbBytes = 0;
this->settings.FskPacketHandler.Size = 0;
break;
}
}
// Read received packet size
if( ( this->settings.FskPacketHandler.Size == 0 ) && ( this->settings.FskPacketHandler.NbBytes == 0 ) )
{
if( this->settings.Fsk.FixLen == false )
{
ReadFifo( ( uint8_t* )&this->settings.FskPacketHandler.Size, 1 );
}
else
{
this->settings.FskPacketHandler.Size = Read( REG_PAYLOADLENGTH );
}
ReadFifo( rxtxBuffer + this->settings.FskPacketHandler.NbBytes, this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
this->settings.FskPacketHandler.NbBytes += ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
}
else
{
ReadFifo( rxtxBuffer + this->settings.FskPacketHandler.NbBytes, this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
this->settings.FskPacketHandler.NbBytes += ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
}
rxTimeoutTimer.detach( );
if( this->settings.Fsk.RxContinuous == false )
{
this->settings.State = RF_IDLE;
rxTimeoutSyncWord.detach( );
}
else
{
// Continuous mode restart Rx chain
Write( REG_RXCONFIG, Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
rxTimeoutSyncWord.attach_us( mbed::callback( this, &SX1276::OnTimeoutIrq ),
this->settings.Fsk.RxSingleTimeout * 1e3 );
}
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxDone != NULL ) )
{
this->RadioEvents->RxDone( rxtxBuffer, this->settings.FskPacketHandler.Size, this->settings.FskPacketHandler.RssiValue, 0 );
}
this->settings.FskPacketHandler.PreambleDetected = false;
this->settings.FskPacketHandler.SyncWordDetected = false;
this->settings.FskPacketHandler.NbBytes = 0;
this->settings.FskPacketHandler.Size = 0;
break;
case MODEM_LORA:
{
int8_t snr = 0;
// Clear Irq
Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_RXDONE );
irqFlags = Read( REG_LR_IRQFLAGS );
if( ( irqFlags & RFLR_IRQFLAGS_PAYLOADCRCERROR_MASK ) == RFLR_IRQFLAGS_PAYLOADCRCERROR )
{
// Clear Irq
Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_PAYLOADCRCERROR );
if( this->settings.LoRa.RxContinuous == false )
{
this->settings.State = RF_IDLE;
}
rxTimeoutTimer.detach( );
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxError != NULL ) )
{
this->RadioEvents->RxError( );
}
break;
}
this->settings.LoRaPacketHandler.SnrValue = Read( REG_LR_PKTSNRVALUE );
if( this->settings.LoRaPacketHandler.SnrValue & 0x80 ) // The SNR sign bit is 1
{
// Invert and divide by 4
snr = ( ( ~this->settings.LoRaPacketHandler.SnrValue + 1 ) & 0xFF ) >> 2;
snr = -snr;
}
else
{
// Divide by 4
snr = ( this->settings.LoRaPacketHandler.SnrValue & 0xFF ) >> 2;
}
int16_t rssi = Read( REG_LR_PKTRSSIVALUE );
if( snr < 0 )
{
if( this->settings.Channel > RF_MID_BAND_THRESH )
{
this->settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_HF + rssi + ( rssi >> 4 ) +
snr;
}
else
{
this->settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_LF + rssi + ( rssi >> 4 ) +
snr;
}
}
else
{
if( this->settings.Channel > RF_MID_BAND_THRESH )
{
this->settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_HF + rssi + ( rssi >> 4 );
}
else
{
this->settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_LF + rssi + ( rssi >> 4 );
}
}
this->settings.LoRaPacketHandler.Size = Read( REG_LR_RXNBBYTES );
ReadFifo( rxtxBuffer, this->settings.LoRaPacketHandler.Size );
if( this->settings.LoRa.RxContinuous == false )
{
this->settings.State = RF_IDLE;
}
rxTimeoutTimer.detach( );
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxDone != NULL ) )
{
this->RadioEvents->RxDone( rxtxBuffer, this->settings.LoRaPacketHandler.Size, this->settings.LoRaPacketHandler.RssiValue, this->settings.LoRaPacketHandler.SnrValue );
}
}
break;
default:
break;
}
break;
case RF_TX_RUNNING:
txTimeoutTimer.detach( );
// TxDone interrupt
switch( this->settings.Modem )
{
case MODEM_LORA:
// Clear Irq
Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_TXDONE );
// Intentional fall through
case MODEM_FSK:
default:
this->settings.State = RF_IDLE;
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->TxDone != NULL ) )
{
this->RadioEvents->TxDone( );
}
break;
}
break;
default:
break;
}
}
void SX1276::OnDio1Irq( void )
{
switch( this->settings.State )
{
case RF_RX_RUNNING:
switch( this->settings.Modem )
{
case MODEM_FSK:
// FifoLevel interrupt
// Read received packet size
if( ( this->settings.FskPacketHandler.Size == 0 ) && ( this->settings.FskPacketHandler.NbBytes == 0 ) )
{
if( this->settings.Fsk.FixLen == false )
{
ReadFifo( ( uint8_t* )&this->settings.FskPacketHandler.Size, 1 );
}
else
{
this->settings.FskPacketHandler.Size = Read( REG_PAYLOADLENGTH );
}
}
if( ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes ) > this->settings.FskPacketHandler.FifoThresh )
{
ReadFifo( ( rxtxBuffer + this->settings.FskPacketHandler.NbBytes ), this->settings.FskPacketHandler.FifoThresh );
this->settings.FskPacketHandler.NbBytes += this->settings.FskPacketHandler.FifoThresh;
}
else
{
ReadFifo( ( rxtxBuffer + this->settings.FskPacketHandler.NbBytes ), this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
this->settings.FskPacketHandler.NbBytes += ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
}
break;
case MODEM_LORA:
// Sync time out
rxTimeoutTimer.detach( );
// Clear Irq
Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_RXTIMEOUT );
this->settings.State = RF_IDLE;
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->RxTimeout != NULL ) )
{
this->RadioEvents->RxTimeout( );
}
break;
default:
break;
}
break;
case RF_TX_RUNNING:
switch( this->settings.Modem )
{
case MODEM_FSK:
// FifoEmpty interrupt
if( ( this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes ) > this->settings.FskPacketHandler.ChunkSize )
{
WriteFifo( ( rxtxBuffer + this->settings.FskPacketHandler.NbBytes ), this->settings.FskPacketHandler.ChunkSize );
this->settings.FskPacketHandler.NbBytes += this->settings.FskPacketHandler.ChunkSize;
}
else
{
// Write the last chunk of data
WriteFifo( rxtxBuffer + this->settings.FskPacketHandler.NbBytes, this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes );
this->settings.FskPacketHandler.NbBytes += this->settings.FskPacketHandler.Size - this->settings.FskPacketHandler.NbBytes;
}
break;
case MODEM_LORA:
break;
default:
break;
}
break;
default:
break;
}
}
void SX1276::OnDio2Irq( void )
{
switch( this->settings.State )
{
case RF_RX_RUNNING:
switch( this->settings.Modem )
{
case MODEM_FSK:
// Checks if DIO4 is connected. If it is not PreambleDtected is set to true.
if( this->dioIrq[4] == NULL )
{
this->settings.FskPacketHandler.PreambleDetected = true;
}
if( ( this->settings.FskPacketHandler.PreambleDetected == true ) && ( this->settings.FskPacketHandler.SyncWordDetected == false ) )
{
rxTimeoutSyncWord.detach( );
this->settings.FskPacketHandler.SyncWordDetected = true;
this->settings.FskPacketHandler.RssiValue = -( Read( REG_RSSIVALUE ) >> 1 );
this->settings.FskPacketHandler.AfcValue = ( int32_t )( double )( ( ( uint16_t )Read( REG_AFCMSB ) << 8 ) |
( uint16_t )Read( REG_AFCLSB ) ) *
( double )FREQ_STEP;
this->settings.FskPacketHandler.RxGain = ( Read( REG_LNA ) >> 5 ) & 0x07;
}
break;
case MODEM_LORA:
if( this->settings.LoRa.FreqHopOn == true )
{
// Clear Irq
Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL );
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->FhssChangeChannel != NULL ) )
{
this->RadioEvents->FhssChangeChannel( ( Read( REG_LR_HOPCHANNEL ) & RFLR_HOPCHANNEL_CHANNEL_MASK ) );
}
}
break;
default:
break;
}
break;
case RF_TX_RUNNING:
switch( this->settings.Modem )
{
case MODEM_FSK:
break;
case MODEM_LORA:
if( this->settings.LoRa.FreqHopOn == true )
{
// Clear Irq
Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL );
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->FhssChangeChannel != NULL ) )
{
this->RadioEvents->FhssChangeChannel( ( Read( REG_LR_HOPCHANNEL ) & RFLR_HOPCHANNEL_CHANNEL_MASK ) );
}
}
break;
default:
break;
}
break;
default:
break;
}
}
void SX1276::OnDio3Irq( void )
{
switch( this->settings.Modem )
{
case MODEM_FSK:
break;
case MODEM_LORA:
if( ( Read( REG_LR_IRQFLAGS ) & RFLR_IRQFLAGS_CADDETECTED ) == RFLR_IRQFLAGS_CADDETECTED )
{
// Clear Irq
Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_CADDETECTED | RFLR_IRQFLAGS_CADDONE );
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->CadDone != NULL ) )
{
this->RadioEvents->CadDone( true );
}
}
else
{
// Clear Irq
Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_CADDONE );
if( ( this->RadioEvents != NULL ) && ( this->RadioEvents->CadDone != NULL ) )
{
this->RadioEvents->CadDone( false );
}
}
break;
default:
break;
}
}
void SX1276::OnDio4Irq( void )
{
switch( this->settings.Modem )
{
case MODEM_FSK:
{
if( this->settings.FskPacketHandler.PreambleDetected == false )
{
this->settings.FskPacketHandler.PreambleDetected = true;
}
}
break;
case MODEM_LORA:
break;
default:
break;
}
}
void SX1276::OnDio5Irq( void )
{
switch( this->settings.Modem )
{
case MODEM_FSK:
break;
case MODEM_LORA:
break;
default:
break;
}
}