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Posted to commits@mynewt.apache.org by cc...@apache.org on 2017/04/29 00:28:45 UTC
[07/19] incubator-mynewt-core git commit: MYNEWT-741 Port of
LoRaMac-node library
http://git-wip-us.apache.org/repos/asf/incubator-mynewt-core/blob/9986f68c/hw/drivers/lora/node/radio/sx1276/src/sx1276.c
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diff --git a/hw/drivers/lora/node/radio/sx1276/src/sx1276.c b/hw/drivers/lora/node/radio/sx1276/src/sx1276.c
new file mode 100644
index 0000000..60007e5
--- /dev/null
+++ b/hw/drivers/lora/node/radio/sx1276/src/sx1276.c
@@ -0,0 +1,1826 @@
+/*
+ / _____) _ | |
+( (____ _____ ____ _| |_ _____ ____| |__
+ \____ \| ___ | (_ _) ___ |/ ___) _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+ (C)2013 Semtech
+
+Description: Generic SX1276 driver implementation
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainer: Miguel Luis, Gregory Cristian and Wael Guibene
+*/
+#include <assert.h>
+#include <math.h>
+#include <string.h>
+#include "syscfg/syscfg.h"
+#include "hal/hal_gpio.h"
+#include "hal/hal_spi.h"
+#include "os/os.h"
+#include "node/lora.h"
+#include "node/radio.h"
+#include "board/board.h"
+#include "sx1276.h"
+#include "sx1276-board.h"
+
+/*
+ * Local types definition
+ */
+
+/*!
+ * Radio registers definition
+ */
+typedef struct
+{
+ RadioModems_t Modem;
+ uint8_t Addr;
+ uint8_t Value;
+}RadioRegisters_t;
+
+/*!
+ * FSK bandwidth definition
+ */
+typedef struct
+{
+ uint32_t bandwidth;
+ uint8_t RegValue;
+}FskBandwidth_t;
+
+
+/*
+ * Private functions prototypes
+ */
+
+/*!
+ * 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
+ */
+static void RxChainCalibration( void );
+
+/*!
+ * \brief Resets the SX1276
+ */
+void SX1276Reset( void );
+
+/*!
+ * \brief Sets the SX1276 in transmission mode for the given time
+ * \param [IN] timeout Transmission timeout [ms] [0: continuous, others timeout]
+ */
+void SX1276SetTx( uint32_t timeout );
+
+/*!
+ * \brief Writes the buffer contents to the SX1276 FIFO
+ *
+ * \param [IN] buffer Buffer containing data to be put on the FIFO.
+ * \param [IN] size Number of bytes to be written to the FIFO
+ */
+void SX1276WriteFifo( uint8_t *buffer, uint8_t size );
+
+/*!
+ * \brief Reads the contents of the SX1276 FIFO
+ *
+ * \param [OUT] buffer Buffer where to copy the FIFO read data.
+ * \param [IN] size Number of bytes to be read from the FIFO
+ */
+void SX1276ReadFifo( uint8_t *buffer, uint8_t size );
+
+/*!
+ * \brief Sets the SX1276 operating mode
+ *
+ * \param [IN] opMode New operating mode
+ */
+void SX1276SetOpMode( uint8_t opMode );
+
+/*
+ * SX1276 DIO IRQ callback functions prototype
+ */
+
+/*!
+ * \brief DIO 0 IRQ callback
+ */
+void SX1276OnDio0Irq(void *unused);
+
+/*!
+ * \brief DIO 1 IRQ callback
+ */
+void SX1276OnDio1Irq(void *unused);
+
+/*!
+ * \brief DIO 2 IRQ callback
+ */
+void SX1276OnDio2Irq(void *unused);
+
+/*!
+ * \brief DIO 3 IRQ callback
+ */
+void SX1276OnDio3Irq(void *unused);
+
+/*!
+ * \brief DIO 4 IRQ callback
+ */
+void SX1276OnDio4Irq(void *unused);
+
+/*!
+ * \brief DIO 5 IRQ callback
+ */
+void SX1276OnDio5Irq(void *unused);
+
+/*!
+ * \brief Tx & Rx timeout timer callback
+ */
+void SX1276OnTimeoutIrq(void *unused);
+
+/*
+ * Private global constants
+ */
+
+/*!
+ * Radio hardware registers initialization
+ *
+ * \remark RADIO_INIT_REGISTERS_VALUE is defined in sx1276-board.h file
+ */
+const RadioRegisters_t RadioRegsInit[] = RADIO_INIT_REGISTERS_VALUE;
+
+/*!
+ * Constant values need to compute the RSSI value
+ */
+#define RSSI_OFFSET_LF -164
+#define RSSI_OFFSET_HF -157
+
+/*!
+ * Precomputed FSK bandwidth registers values
+ */
+const FskBandwidth_t 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
+};
+
+/*
+ * Private global variables
+ */
+
+/*!
+ * Radio callbacks variable
+ */
+static RadioEvents_t *RadioEvents;
+
+/*!
+ * Reception buffer
+ */
+static uint8_t RxTxBuffer[RX_BUFFER_SIZE];
+
+/*
+ * Public global variables
+ */
+
+/*!
+ * Radio hardware and global parameters
+ */
+SX1276_t SX1276;
+
+/*!
+ * Hardware DIO IRQ callback initialization
+ */
+DioIrqHandler *DioIrq[] = { SX1276OnDio0Irq, SX1276OnDio1Irq,
+ SX1276OnDio2Irq, SX1276OnDio3Irq,
+ SX1276OnDio4Irq, NULL };
+
+/*!
+ * Tx and Rx timers
+ */
+struct hal_timer TxTimeoutTimer;
+struct hal_timer RxTimeoutTimer;
+struct hal_timer RxTimeoutSyncWord;
+
+static uint32_t rx_timeout_sync_delay = -1;
+
+static void
+SX1276RxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr )
+{
+ STATS_INC(lora_stats, rx_success);
+
+ if( ( RadioEvents != NULL ) && ( RadioEvents->RxDone != NULL ) )
+ {
+ RadioEvents->RxDone( payload, size, rssi, snr );
+ }
+}
+
+static void
+SX1276RxError( void )
+{
+ STATS_INC(lora_stats, rx_error);
+
+ if( ( RadioEvents != NULL ) && ( RadioEvents->RxError != NULL ) )
+ {
+ RadioEvents->RxError( );
+ }
+}
+
+static void
+SX1276RxTimeout( void )
+{
+ STATS_INC(lora_stats, rx_timeout);
+
+ if( ( RadioEvents != NULL ) && ( RadioEvents->RxTimeout != NULL ) )
+ {
+ RadioEvents->RxTimeout( );
+ }
+}
+
+static void
+SX1276TxDone( void )
+{
+ STATS_INC(lora_stats, tx_success);
+
+ if( ( RadioEvents != NULL ) && ( RadioEvents->TxDone != NULL ) )
+ {
+ RadioEvents->TxDone( );
+ }
+}
+
+static void
+SX1276TxTimeout( void )
+{
+ STATS_INC(lora_stats, tx_timeout);
+
+ if( ( RadioEvents != NULL ) && ( RadioEvents->TxTimeout != NULL ) )
+ {
+ RadioEvents->TxTimeout( );
+ }
+}
+
+/*
+ * Radio driver functions implementation
+ */
+
+void SX1276Init( RadioEvents_t *events )
+{
+ uint8_t i;
+
+ RadioEvents = events;
+
+ // Initialize driver timeout timers
+ os_cputime_timer_init(&TxTimeoutTimer, SX1276OnTimeoutIrq, NULL);
+ os_cputime_timer_init(&RxTimeoutTimer, SX1276OnTimeoutIrq, NULL);
+ os_cputime_timer_init(&RxTimeoutSyncWord, SX1276OnTimeoutIrq, NULL);
+
+ SX1276Reset( );
+
+ RxChainCalibration( );
+
+ SX1276SetOpMode( RF_OPMODE_SLEEP );
+
+ SX1276IoIrqInit( DioIrq );
+
+ for( i = 0; i < sizeof( RadioRegsInit ) / sizeof( RadioRegisters_t ); i++ )
+ {
+ SX1276SetModem( RadioRegsInit[i].Modem );
+ SX1276Write( RadioRegsInit[i].Addr, RadioRegsInit[i].Value );
+ }
+
+ SX1276SetModem( MODEM_FSK );
+
+ SX1276.Settings.State = RF_IDLE;
+}
+
+RadioState_t SX1276GetStatus( void )
+{
+ return SX1276.Settings.State;
+}
+
+void SX1276SetChannel( uint32_t freq )
+{
+ SX1276.Settings.Channel = freq;
+ freq = ( uint32_t )( ( double )freq / ( double )FREQ_STEP );
+ SX1276Write( REG_FRFMSB, ( uint8_t )( ( freq >> 16 ) & 0xFF ) );
+ SX1276Write( REG_FRFMID, ( uint8_t )( ( freq >> 8 ) & 0xFF ) );
+ SX1276Write( REG_FRFLSB, ( uint8_t )( freq & 0xFF ) );
+}
+
+bool SX1276IsChannelFree( RadioModems_t modem, uint32_t freq, int16_t rssiThresh )
+{
+ int16_t rssi = 0;
+
+ SX1276SetModem( modem );
+
+ SX1276SetChannel( freq );
+
+ SX1276SetOpMode( RF_OPMODE_RECEIVER );
+
+ os_cputime_delay_usecs(1000);
+
+ rssi = SX1276ReadRssi( modem );
+
+ SX1276SetSleep( );
+
+ if( rssi > rssiThresh )
+ {
+ return false;
+ }
+ return true;
+}
+
+uint32_t SX1276Random( void )
+{
+ uint8_t i;
+ uint32_t rnd = 0;
+
+ /*
+ * Radio setup for random number generation
+ */
+ // Set LoRa modem ON
+ SX1276SetModem( MODEM_LORA );
+
+ // Disable LoRa modem interrupts
+ SX1276Write( 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
+ SX1276SetOpMode( RF_OPMODE_RECEIVER );
+
+ for( i = 0; i < 32; i++ )
+ {
+ os_cputime_delay_usecs(1000);
+ // Unfiltered RSSI value reading. Only takes the LSB value
+ rnd |= ( ( uint32_t )SX1276Read( REG_LR_RSSIWIDEBAND ) & 0x01 ) << i;
+ }
+
+ SX1276SetSleep( );
+
+ 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
+ */
+static void RxChainCalibration( void )
+{
+ uint8_t regPaConfigInitVal;
+ uint32_t initialFreq;
+
+ // Save context
+ regPaConfigInitVal = SX1276Read( REG_PACONFIG );
+ initialFreq = ( double )( ( ( uint32_t )SX1276Read( REG_FRFMSB ) << 16 ) |
+ ( ( uint32_t )SX1276Read( REG_FRFMID ) << 8 ) |
+ ( ( uint32_t )SX1276Read( REG_FRFLSB ) ) ) * ( double )FREQ_STEP;
+
+ // Cut the PA just in case, RFO output, power = -1 dBm
+ SX1276Write( REG_PACONFIG, 0x00 );
+
+ // Launch Rx chain calibration for LF band
+ SX1276Write( REG_IMAGECAL, ( SX1276Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_MASK ) | RF_IMAGECAL_IMAGECAL_START );
+ while( ( SX1276Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_RUNNING ) == RF_IMAGECAL_IMAGECAL_RUNNING )
+ {
+ }
+
+ // Sets a Frequency in HF band
+ SX1276SetChannel( 868000000 );
+
+ // Launch Rx chain calibration for HF band
+ SX1276Write( REG_IMAGECAL, ( SX1276Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_MASK ) | RF_IMAGECAL_IMAGECAL_START );
+ while( ( SX1276Read( REG_IMAGECAL ) & RF_IMAGECAL_IMAGECAL_RUNNING ) == RF_IMAGECAL_IMAGECAL_RUNNING )
+ {
+ }
+
+ // Restore context
+ SX1276Write( REG_PACONFIG, regPaConfigInitVal );
+ SX1276SetChannel( initialFreq );
+}
+
+/*!
+ * Returns the known FSK bandwidth registers value
+ *
+ * \param [IN] bandwidth Bandwidth value in Hz
+ * \retval regValue Bandwidth register value.
+ */
+static uint8_t 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 SX1276SetRxConfig( 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 )
+{
+ SX1276SetModem( modem );
+
+ switch( modem )
+ {
+ case MODEM_FSK:
+ {
+ SX1276.Settings.Fsk.Bandwidth = bandwidth;
+ SX1276.Settings.Fsk.Datarate = datarate;
+ SX1276.Settings.Fsk.BandwidthAfc = bandwidthAfc;
+ SX1276.Settings.Fsk.FixLen = fixLen;
+ SX1276.Settings.Fsk.PayloadLen = payloadLen;
+ SX1276.Settings.Fsk.CrcOn = crcOn;
+ SX1276.Settings.Fsk.IqInverted = iqInverted;
+ SX1276.Settings.Fsk.RxContinuous = rxContinuous;
+ SX1276.Settings.Fsk.PreambleLen = preambleLen;
+
+ datarate = ( uint16_t )( ( double )XTAL_FREQ / ( double )datarate );
+ SX1276Write( REG_BITRATEMSB, ( uint8_t )( datarate >> 8 ) );
+ SX1276Write( REG_BITRATELSB, ( uint8_t )( datarate & 0xFF ) );
+
+ SX1276Write( REG_RXBW, GetFskBandwidthRegValue( bandwidth ) );
+ SX1276Write( REG_AFCBW, GetFskBandwidthRegValue( bandwidthAfc ) );
+
+ SX1276Write( REG_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) );
+ SX1276Write( REG_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) );
+
+ if( fixLen == 1 )
+ {
+ SX1276Write( REG_PAYLOADLENGTH, payloadLen );
+ }
+ else
+ {
+ SX1276Write( REG_PAYLOADLENGTH, 0xFF ); // Set payload length to the maximum
+ }
+
+ SX1276Write( REG_PACKETCONFIG1,
+ ( SX1276Read( REG_PACKETCONFIG1 ) &
+ RF_PACKETCONFIG1_CRC_MASK &
+ RF_PACKETCONFIG1_PACKETFORMAT_MASK ) |
+ ( ( fixLen == 1 ) ? RF_PACKETCONFIG1_PACKETFORMAT_FIXED : RF_PACKETCONFIG1_PACKETFORMAT_VARIABLE ) |
+ ( crcOn << 4 ) );
+ }
+ 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;
+ SX1276.Settings.LoRa.Bandwidth = bandwidth;
+ SX1276.Settings.LoRa.Datarate = datarate;
+ SX1276.Settings.LoRa.Coderate = coderate;
+ SX1276.Settings.LoRa.PreambleLen = preambleLen;
+ SX1276.Settings.LoRa.FixLen = fixLen;
+ SX1276.Settings.LoRa.PayloadLen = payloadLen;
+ SX1276.Settings.LoRa.CrcOn = crcOn;
+ SX1276.Settings.LoRa.FreqHopOn = freqHopOn;
+ SX1276.Settings.LoRa.HopPeriod = hopPeriod;
+ SX1276.Settings.LoRa.IqInverted = iqInverted;
+ SX1276.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 ) ) )
+ {
+ SX1276.Settings.LoRa.LowDatarateOptimize = 0x01;
+ }
+ else
+ {
+ SX1276.Settings.LoRa.LowDatarateOptimize = 0x00;
+ }
+
+ SX1276Write( REG_LR_MODEMCONFIG1,
+ ( SX1276Read( REG_LR_MODEMCONFIG1 ) &
+ RFLR_MODEMCONFIG1_BW_MASK &
+ RFLR_MODEMCONFIG1_CODINGRATE_MASK &
+ RFLR_MODEMCONFIG1_IMPLICITHEADER_MASK ) |
+ ( bandwidth << 4 ) | ( coderate << 1 ) |
+ fixLen );
+
+ SX1276Write( REG_LR_MODEMCONFIG2,
+ ( SX1276Read( 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 ) );
+
+ SX1276Write( REG_LR_MODEMCONFIG3,
+ ( SX1276Read( REG_LR_MODEMCONFIG3 ) &
+ RFLR_MODEMCONFIG3_LOWDATARATEOPTIMIZE_MASK ) |
+ ( SX1276.Settings.LoRa.LowDatarateOptimize << 3 ) );
+
+ SX1276Write( REG_LR_SYMBTIMEOUTLSB, ( uint8_t )( symbTimeout & 0xFF ) );
+
+ SX1276Write( REG_LR_PREAMBLEMSB, ( uint8_t )( ( preambleLen >> 8 ) & 0xFF ) );
+ SX1276Write( REG_LR_PREAMBLELSB, ( uint8_t )( preambleLen & 0xFF ) );
+
+ if( fixLen == 1 )
+ {
+ SX1276Write( REG_LR_PAYLOADLENGTH, payloadLen );
+ }
+
+ if( SX1276.Settings.LoRa.FreqHopOn == true )
+ {
+ SX1276Write( REG_LR_PLLHOP, ( SX1276Read( REG_LR_PLLHOP ) & RFLR_PLLHOP_FASTHOP_MASK ) | RFLR_PLLHOP_FASTHOP_ON );
+ SX1276Write( REG_LR_HOPPERIOD, SX1276.Settings.LoRa.HopPeriod );
+ }
+
+ if( ( bandwidth == 9 ) && ( SX1276.Settings.Channel > RF_MID_BAND_THRESH ) )
+ {
+ // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
+ SX1276Write( REG_LR_TEST36, 0x02 );
+ SX1276Write( REG_LR_TEST3A, 0x64 );
+ }
+ else if( bandwidth == 9 )
+ {
+ // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
+ SX1276Write( REG_LR_TEST36, 0x02 );
+ SX1276Write( REG_LR_TEST3A, 0x7F );
+ }
+ else
+ {
+ // ERRATA 2.1 - Sensitivity Optimization with a 500 kHz Bandwidth
+ SX1276Write( REG_LR_TEST36, 0x03 );
+ }
+
+ if( datarate == 6 )
+ {
+ SX1276Write( REG_LR_DETECTOPTIMIZE,
+ ( SX1276Read( REG_LR_DETECTOPTIMIZE ) &
+ RFLR_DETECTIONOPTIMIZE_MASK ) |
+ RFLR_DETECTIONOPTIMIZE_SF6 );
+ SX1276Write( REG_LR_DETECTIONTHRESHOLD,
+ RFLR_DETECTIONTHRESH_SF6 );
+ }
+ else
+ {
+ SX1276Write( REG_LR_DETECTOPTIMIZE,
+ ( SX1276Read( REG_LR_DETECTOPTIMIZE ) &
+ RFLR_DETECTIONOPTIMIZE_MASK ) |
+ RFLR_DETECTIONOPTIMIZE_SF7_TO_SF12 );
+ SX1276Write( REG_LR_DETECTIONTHRESHOLD,
+ RFLR_DETECTIONTHRESH_SF7_TO_SF12 );
+ }
+ }
+ break;
+ }
+}
+
+void SX1276SetTxConfig( 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 )
+{
+ uint8_t paConfig = 0;
+ uint8_t paDac = 0;
+
+ SX1276SetModem( modem );
+
+ paConfig = SX1276Read( REG_PACONFIG );
+ paDac = SX1276Read( REG_PADAC );
+
+ paConfig = ( paConfig & RF_PACONFIG_PASELECT_MASK ) | SX1276GetPaSelect( SX1276.Settings.Channel );
+ paConfig = ( paConfig & RF_PACONFIG_MAX_POWER_MASK ) | 0x70;
+
+ if( ( paConfig & RF_PACONFIG_PASELECT_PABOOST ) == RF_PACONFIG_PASELECT_PABOOST )
+ {
+ if( power > 17 )
+ {
+ paDac = ( paDac & RF_PADAC_20DBM_MASK ) | RF_PADAC_20DBM_ON;
+ }
+ else
+ {
+ paDac = ( paDac & RF_PADAC_20DBM_MASK ) | RF_PADAC_20DBM_OFF;
+ }
+ if( ( paDac & RF_PADAC_20DBM_ON ) == RF_PADAC_20DBM_ON )
+ {
+ if( power < 5 )
+ {
+ power = 5;
+ }
+ if( power > 20 )
+ {
+ power = 20;
+ }
+ paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power - 5 ) & 0x0F );
+ }
+ else
+ {
+ if( power < 2 )
+ {
+ power = 2;
+ }
+ if( power > 17 )
+ {
+ power = 17;
+ }
+ paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power - 2 ) & 0x0F );
+ }
+ }
+ else
+ {
+ if( power < -1 )
+ {
+ power = -1;
+ }
+ if( power > 14 )
+ {
+ power = 14;
+ }
+ paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power + 1 ) & 0x0F );
+ }
+ SX1276Write( REG_PACONFIG, paConfig );
+ SX1276Write( REG_PADAC, paDac );
+
+ switch( modem )
+ {
+ case MODEM_FSK:
+ {
+ SX1276.Settings.Fsk.Power = power;
+ SX1276.Settings.Fsk.Fdev = fdev;
+ SX1276.Settings.Fsk.Bandwidth = bandwidth;
+ SX1276.Settings.Fsk.Datarate = datarate;
+ SX1276.Settings.Fsk.PreambleLen = preambleLen;
+ SX1276.Settings.Fsk.FixLen = fixLen;
+ SX1276.Settings.Fsk.CrcOn = crcOn;
+ SX1276.Settings.Fsk.IqInverted = iqInverted;
+ SX1276.Settings.Fsk.TxTimeout = timeout;
+
+ fdev = ( uint16_t )( ( double )fdev / ( double )FREQ_STEP );
+ SX1276Write( REG_FDEVMSB, ( uint8_t )( fdev >> 8 ) );
+ SX1276Write( REG_FDEVLSB, ( uint8_t )( fdev & 0xFF ) );
+
+ datarate = ( uint16_t )( ( double )XTAL_FREQ / ( double )datarate );
+ SX1276Write( REG_BITRATEMSB, ( uint8_t )( datarate >> 8 ) );
+ SX1276Write( REG_BITRATELSB, ( uint8_t )( datarate & 0xFF ) );
+
+ SX1276Write( REG_PREAMBLEMSB, ( preambleLen >> 8 ) & 0x00FF );
+ SX1276Write( REG_PREAMBLELSB, preambleLen & 0xFF );
+
+ SX1276Write( REG_PACKETCONFIG1,
+ ( SX1276Read( REG_PACKETCONFIG1 ) &
+ RF_PACKETCONFIG1_CRC_MASK &
+ RF_PACKETCONFIG1_PACKETFORMAT_MASK ) |
+ ( ( fixLen == 1 ) ? RF_PACKETCONFIG1_PACKETFORMAT_FIXED : RF_PACKETCONFIG1_PACKETFORMAT_VARIABLE ) |
+ ( crcOn << 4 ) );
+
+ }
+ break;
+ case MODEM_LORA:
+ {
+ SX1276.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;
+ SX1276.Settings.LoRa.Bandwidth = bandwidth;
+ SX1276.Settings.LoRa.Datarate = datarate;
+ SX1276.Settings.LoRa.Coderate = coderate;
+ SX1276.Settings.LoRa.PreambleLen = preambleLen;
+ SX1276.Settings.LoRa.FixLen = fixLen;
+ SX1276.Settings.LoRa.FreqHopOn = freqHopOn;
+ SX1276.Settings.LoRa.HopPeriod = hopPeriod;
+ SX1276.Settings.LoRa.CrcOn = crcOn;
+ SX1276.Settings.LoRa.IqInverted = iqInverted;
+ SX1276.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 ) ) )
+ {
+ SX1276.Settings.LoRa.LowDatarateOptimize = 0x01;
+ }
+ else
+ {
+ SX1276.Settings.LoRa.LowDatarateOptimize = 0x00;
+ }
+
+ if( SX1276.Settings.LoRa.FreqHopOn == true )
+ {
+ SX1276Write( REG_LR_PLLHOP, ( SX1276Read( REG_LR_PLLHOP ) & RFLR_PLLHOP_FASTHOP_MASK ) | RFLR_PLLHOP_FASTHOP_ON );
+ SX1276Write( REG_LR_HOPPERIOD, SX1276.Settings.LoRa.HopPeriod );
+ }
+
+ SX1276Write( REG_LR_MODEMCONFIG1,
+ ( SX1276Read( REG_LR_MODEMCONFIG1 ) &
+ RFLR_MODEMCONFIG1_BW_MASK &
+ RFLR_MODEMCONFIG1_CODINGRATE_MASK &
+ RFLR_MODEMCONFIG1_IMPLICITHEADER_MASK ) |
+ ( bandwidth << 4 ) | ( coderate << 1 ) |
+ fixLen );
+
+ SX1276Write( REG_LR_MODEMCONFIG2,
+ ( SX1276Read( REG_LR_MODEMCONFIG2 ) &
+ RFLR_MODEMCONFIG2_SF_MASK &
+ RFLR_MODEMCONFIG2_RXPAYLOADCRC_MASK ) |
+ ( datarate << 4 ) | ( crcOn << 2 ) );
+
+ SX1276Write( REG_LR_MODEMCONFIG3,
+ ( SX1276Read( REG_LR_MODEMCONFIG3 ) &
+ RFLR_MODEMCONFIG3_LOWDATARATEOPTIMIZE_MASK ) |
+ ( SX1276.Settings.LoRa.LowDatarateOptimize << 3 ) );
+
+ SX1276Write( REG_LR_PREAMBLEMSB, ( preambleLen >> 8 ) & 0x00FF );
+ SX1276Write( REG_LR_PREAMBLELSB, preambleLen & 0xFF );
+
+ if( datarate == 6 )
+ {
+ SX1276Write( REG_LR_DETECTOPTIMIZE,
+ ( SX1276Read( REG_LR_DETECTOPTIMIZE ) &
+ RFLR_DETECTIONOPTIMIZE_MASK ) |
+ RFLR_DETECTIONOPTIMIZE_SF6 );
+ SX1276Write( REG_LR_DETECTIONTHRESHOLD,
+ RFLR_DETECTIONTHRESH_SF6 );
+ }
+ else
+ {
+ SX1276Write( REG_LR_DETECTOPTIMIZE,
+ ( SX1276Read( REG_LR_DETECTOPTIMIZE ) &
+ RFLR_DETECTIONOPTIMIZE_MASK ) |
+ RFLR_DETECTIONOPTIMIZE_SF7_TO_SF12 );
+ SX1276Write( REG_LR_DETECTIONTHRESHOLD,
+ RFLR_DETECTIONTHRESH_SF7_TO_SF12 );
+ }
+ }
+ break;
+ }
+}
+
+uint32_t SX1276GetTimeOnAir( RadioModems_t modem, uint8_t pktLen )
+{
+ uint32_t airTime = 0;
+
+ switch( modem )
+ {
+ case MODEM_FSK:
+ {
+ airTime = round( ( 8 * ( SX1276.Settings.Fsk.PreambleLen +
+ ( ( SX1276Read( REG_SYNCCONFIG ) & ~RF_SYNCCONFIG_SYNCSIZE_MASK ) + 1 ) +
+ ( ( SX1276.Settings.Fsk.FixLen == 0x01 ) ? 0.0 : 1.0 ) +
+ ( ( ( SX1276Read( REG_PACKETCONFIG1 ) & ~RF_PACKETCONFIG1_ADDRSFILTERING_MASK ) != 0x00 ) ? 1.0 : 0 ) +
+ pktLen +
+ ( ( SX1276.Settings.Fsk.CrcOn == 0x01 ) ? 2.0 : 0 ) ) /
+ SX1276.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( SX1276.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 << SX1276.Settings.LoRa.Datarate );
+ double ts = 1 / rs;
+ // time of preamble
+ double tPreamble = ( SX1276.Settings.LoRa.PreambleLen + 4.25 ) * ts;
+ // Symbol length of payload and time
+ double tmp = ceil( ( 8 * pktLen - 4 * SX1276.Settings.LoRa.Datarate +
+ 28 + 16 * SX1276.Settings.LoRa.CrcOn -
+ ( SX1276.Settings.LoRa.FixLen ? 20 : 0 ) ) /
+ ( double )( 4 * SX1276.Settings.LoRa.Datarate -
+ ( ( SX1276.Settings.LoRa.LowDatarateOptimize > 0 ) ? 2 : 0 ) ) ) *
+ ( SX1276.Settings.LoRa.Coderate + 4 );
+ double nPayload = 8 + ( ( tmp > 0 ) ? tmp : 0 );
+ double tPayload = nPayload * ts;
+ // Time on air
+ double tOnAir = tPreamble + tPayload;
+ // return us secs
+ airTime = floor( tOnAir * 1e3 + 0.999 );
+ }
+ break;
+ }
+ return airTime;
+}
+
+void SX1276Send( uint8_t *buffer, uint8_t size )
+{
+ uint32_t txTimeout = 0;
+
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ {
+ SX1276.Settings.FskPacketHandler.NbBytes = 0;
+ SX1276.Settings.FskPacketHandler.Size = size;
+
+ if( SX1276.Settings.Fsk.FixLen == false )
+ {
+ SX1276WriteFifo( ( uint8_t* )&size, 1 );
+ }
+ else
+ {
+ SX1276Write( REG_PAYLOADLENGTH, size );
+ }
+
+ if( ( size > 0 ) && ( size <= 64 ) )
+ {
+ SX1276.Settings.FskPacketHandler.ChunkSize = size;
+ }
+ else
+ {
+ memcpy( RxTxBuffer, buffer, size );
+ SX1276.Settings.FskPacketHandler.ChunkSize = 32;
+ }
+
+ // Write payload buffer
+ SX1276WriteFifo( buffer, SX1276.Settings.FskPacketHandler.ChunkSize );
+ SX1276.Settings.FskPacketHandler.NbBytes += SX1276.Settings.FskPacketHandler.ChunkSize;
+ txTimeout = SX1276.Settings.Fsk.TxTimeout;
+ }
+ break;
+ case MODEM_LORA:
+ {
+ if( SX1276.Settings.LoRa.IqInverted == true )
+ {
+ SX1276Write( REG_LR_INVERTIQ, ( ( SX1276Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_ON ) );
+ SX1276Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_ON );
+ }
+ else
+ {
+ SX1276Write( REG_LR_INVERTIQ, ( ( SX1276Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_OFF ) );
+ SX1276Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_OFF );
+ }
+
+ SX1276.Settings.LoRaPacketHandler.Size = size;
+
+ // Initializes the payload size
+ SX1276Write( REG_LR_PAYLOADLENGTH, size );
+
+ // Full buffer used for Tx
+ SX1276Write( REG_LR_FIFOTXBASEADDR, 0 );
+ SX1276Write( REG_LR_FIFOADDRPTR, 0 );
+
+ // FIFO operations can not take place in Sleep mode
+ if( ( SX1276Read( REG_OPMODE ) & ~RF_OPMODE_MASK ) == RF_OPMODE_SLEEP )
+ {
+ SX1276SetStby( );
+ os_cputime_delay_usecs(1000);
+ }
+ // Write payload buffer
+ SX1276WriteFifo( buffer, size );
+ txTimeout = SX1276.Settings.LoRa.TxTimeout;
+ }
+ break;
+ }
+
+ SX1276SetTx( txTimeout );
+}
+
+void SX1276SetSleep( void )
+{
+ os_cputime_timer_stop(&RxTimeoutTimer);
+ os_cputime_timer_stop(&TxTimeoutTimer);
+
+ SX1276SetOpMode( RF_OPMODE_SLEEP );
+ SX1276.Settings.State = RF_IDLE;
+}
+
+void SX1276SetStby( void )
+{
+ os_cputime_timer_stop(&RxTimeoutTimer);
+ os_cputime_timer_stop(&TxTimeoutTimer);
+
+ SX1276SetOpMode( RF_OPMODE_STANDBY );
+ SX1276.Settings.State = RF_IDLE;
+}
+
+void SX1276SetRx( uint32_t timeout )
+{
+ bool rxContinuous = false;
+
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ {
+ rxContinuous = SX1276.Settings.Fsk.RxContinuous;
+
+ // DIO0=PayloadReady
+ // DIO1=FifoLevel
+ // DIO2=SyncAddr
+ // DIO3=FifoEmpty
+ // DIO4=Preamble
+ // DIO5=ModeReady
+ SX1276Write( REG_DIOMAPPING1, ( SX1276Read( 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 );
+
+ SX1276Write( REG_DIOMAPPING2, ( SX1276Read( REG_DIOMAPPING2 ) & RF_DIOMAPPING2_DIO4_MASK &
+ RF_DIOMAPPING2_MAP_MASK ) |
+ RF_DIOMAPPING2_DIO4_11 |
+ RF_DIOMAPPING2_MAP_PREAMBLEDETECT );
+
+ SX1276.Settings.FskPacketHandler.FifoThresh = SX1276Read( REG_FIFOTHRESH ) & 0x3F;
+
+ SX1276Write( REG_RXCONFIG, RF_RXCONFIG_AFCAUTO_ON | RF_RXCONFIG_AGCAUTO_ON | RF_RXCONFIG_RXTRIGER_PREAMBLEDETECT );
+
+ SX1276.Settings.FskPacketHandler.PreambleDetected = false;
+ SX1276.Settings.FskPacketHandler.SyncWordDetected = false;
+ SX1276.Settings.FskPacketHandler.NbBytes = 0;
+ SX1276.Settings.FskPacketHandler.Size = 0;
+ }
+ break;
+ case MODEM_LORA:
+ {
+ if( SX1276.Settings.LoRa.IqInverted == true )
+ {
+ SX1276Write( REG_LR_INVERTIQ, ( ( SX1276Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_ON | RFLR_INVERTIQ_TX_OFF ) );
+ SX1276Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_ON );
+ }
+ else
+ {
+ SX1276Write( REG_LR_INVERTIQ, ( ( SX1276Read( REG_LR_INVERTIQ ) & RFLR_INVERTIQ_TX_MASK & RFLR_INVERTIQ_RX_MASK ) | RFLR_INVERTIQ_RX_OFF | RFLR_INVERTIQ_TX_OFF ) );
+ SX1276Write( REG_LR_INVERTIQ2, RFLR_INVERTIQ2_OFF );
+ }
+
+ // ERRATA 2.3 - Receiver Spurious Reception of a LoRa Signal
+ if( SX1276.Settings.LoRa.Bandwidth < 9 )
+ {
+ SX1276Write( REG_LR_DETECTOPTIMIZE, SX1276Read( REG_LR_DETECTOPTIMIZE ) & 0x7F );
+ SX1276Write( REG_LR_TEST30, 0x00 );
+ switch( SX1276.Settings.LoRa.Bandwidth )
+ {
+ case 0: // 7.8 kHz
+ SX1276Write( REG_LR_TEST2F, 0x48 );
+ SX1276SetChannel(SX1276.Settings.Channel + 7.81e3 );
+ break;
+ case 1: // 10.4 kHz
+ SX1276Write( REG_LR_TEST2F, 0x44 );
+ SX1276SetChannel(SX1276.Settings.Channel + 10.42e3 );
+ break;
+ case 2: // 15.6 kHz
+ SX1276Write( REG_LR_TEST2F, 0x44 );
+ SX1276SetChannel(SX1276.Settings.Channel + 15.62e3 );
+ break;
+ case 3: // 20.8 kHz
+ SX1276Write( REG_LR_TEST2F, 0x44 );
+ SX1276SetChannel(SX1276.Settings.Channel + 20.83e3 );
+ break;
+ case 4: // 31.2 kHz
+ SX1276Write( REG_LR_TEST2F, 0x44 );
+ SX1276SetChannel(SX1276.Settings.Channel + 31.25e3 );
+ break;
+ case 5: // 41.4 kHz
+ SX1276Write( REG_LR_TEST2F, 0x44 );
+ SX1276SetChannel(SX1276.Settings.Channel + 41.67e3 );
+ break;
+ case 6: // 62.5 kHz
+ SX1276Write( REG_LR_TEST2F, 0x40 );
+ break;
+ case 7: // 125 kHz
+ SX1276Write( REG_LR_TEST2F, 0x40 );
+ break;
+ case 8: // 250 kHz
+ SX1276Write( REG_LR_TEST2F, 0x40 );
+ break;
+ }
+ }
+ else
+ {
+ SX1276Write( REG_LR_DETECTOPTIMIZE, SX1276Read( REG_LR_DETECTOPTIMIZE ) | 0x80 );
+ }
+
+ rxContinuous = SX1276.Settings.LoRa.RxContinuous;
+
+ if( SX1276.Settings.LoRa.FreqHopOn == true )
+ {
+ SX1276Write( 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
+ SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK & RFLR_DIOMAPPING1_DIO2_MASK ) | RFLR_DIOMAPPING1_DIO0_00 | RFLR_DIOMAPPING1_DIO2_00 );
+ }
+ else
+ {
+ SX1276Write( 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
+ SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_00 );
+ }
+ SX1276Write( REG_LR_FIFORXBASEADDR, 0 );
+ SX1276Write( REG_LR_FIFOADDRPTR, 0 );
+ }
+ break;
+ }
+
+ memset( RxTxBuffer, 0, ( size_t )RX_BUFFER_SIZE );
+
+ SX1276.Settings.State = RF_RX_RUNNING;
+ if( timeout != 0 )
+ {
+ os_cputime_timer_relative(&RxTimeoutTimer, timeout*1000);
+ }
+
+ if( SX1276.Settings.Modem == MODEM_FSK )
+ {
+ SX1276SetOpMode( RF_OPMODE_RECEIVER );
+
+ if( rxContinuous == false )
+ {
+ rx_timeout_sync_delay =
+ ceil((8.0 * (SX1276.Settings.Fsk.PreambleLen +
+ ((SX1276Read(REG_SYNCCONFIG) &
+ ~RF_SYNCCONFIG_SYNCSIZE_MASK) + 1.0) + 10.0) /
+ (double)SX1276.Settings.Fsk.Datarate) * 1e3) + 4;
+ os_cputime_timer_relative(
+ &RxTimeoutSyncWord, rx_timeout_sync_delay*1000);
+ }
+ }
+ else
+ {
+ if( rxContinuous == true )
+ {
+ SX1276SetOpMode( RFLR_OPMODE_RECEIVER );
+ }
+ else
+ {
+ SX1276SetOpMode( RFLR_OPMODE_RECEIVER_SINGLE );
+ }
+ }
+}
+
+void SX1276SetTx( uint32_t timeout )
+{
+ os_cputime_timer_relative(&TxTimeoutTimer, timeout*1000);
+
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ {
+ // DIO0=PacketSent
+ // DIO1=FifoEmpty
+ // DIO2=FifoFull
+ // DIO3=FifoEmpty
+ // DIO4=LowBat
+ // DIO5=ModeReady
+ SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RF_DIOMAPPING1_DIO0_MASK &
+ RF_DIOMAPPING1_DIO1_MASK &
+ RF_DIOMAPPING1_DIO2_MASK ) |
+ RF_DIOMAPPING1_DIO1_01 );
+
+ SX1276Write( REG_DIOMAPPING2, ( SX1276Read( REG_DIOMAPPING2 ) & RF_DIOMAPPING2_DIO4_MASK &
+ RF_DIOMAPPING2_MAP_MASK ) );
+ SX1276.Settings.FskPacketHandler.FifoThresh = SX1276Read( REG_FIFOTHRESH ) & 0x3F;
+ }
+ break;
+ case MODEM_LORA:
+ {
+ if( SX1276.Settings.LoRa.FreqHopOn == true )
+ {
+ SX1276Write( 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
+ SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK & RFLR_DIOMAPPING1_DIO2_MASK ) | RFLR_DIOMAPPING1_DIO0_01 | RFLR_DIOMAPPING1_DIO2_00 );
+ }
+ else
+ {
+ SX1276Write( 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
+ SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_01 );
+ }
+ }
+ break;
+ }
+
+ SX1276.Settings.State = RF_TX_RUNNING;
+ os_cputime_timer_relative(&TxTimeoutTimer, timeout*1000);
+ SX1276SetOpMode( RF_OPMODE_TRANSMITTER );
+}
+
+void SX1276StartCad( void )
+{
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ {
+
+ }
+ break;
+ case MODEM_LORA:
+ {
+ SX1276Write( 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
+ SX1276Write( REG_DIOMAPPING1, ( SX1276Read( REG_DIOMAPPING1 ) & RFLR_DIOMAPPING1_DIO0_MASK ) | RFLR_DIOMAPPING1_DIO0_00 );
+
+ SX1276.Settings.State = RF_CAD;
+ SX1276SetOpMode( RFLR_OPMODE_CAD );
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+int16_t SX1276ReadRssi( RadioModems_t modem )
+{
+ int16_t rssi = 0;
+
+ switch( modem )
+ {
+ case MODEM_FSK:
+ rssi = -( SX1276Read( REG_RSSIVALUE ) >> 1 );
+ break;
+ case MODEM_LORA:
+ if( SX1276.Settings.Channel > RF_MID_BAND_THRESH )
+ {
+ rssi = RSSI_OFFSET_HF + SX1276Read( REG_LR_RSSIVALUE );
+ }
+ else
+ {
+ rssi = RSSI_OFFSET_LF + SX1276Read( REG_LR_RSSIVALUE );
+ }
+ break;
+ default:
+ rssi = -1;
+ break;
+ }
+ return rssi;
+}
+
+void SX1276Reset( void )
+{
+ // Set RESET pin to 0
+ hal_gpio_init_out(RADIO_RESET, 0);
+
+ // Wait 1 ms
+ os_cputime_delay_usecs(1000);
+
+ // Configure RESET as input
+ hal_gpio_init_in(RADIO_RESET, HAL_GPIO_PULL_NONE);
+
+ // Wait 6 ms
+ os_cputime_delay_usecs(6000);
+}
+
+void SX1276SetOpMode( uint8_t opMode )
+{
+ if( opMode == RF_OPMODE_SLEEP )
+ {
+ SX1276SetAntSwLowPower( true );
+ }
+ else
+ {
+ SX1276SetAntSwLowPower( false );
+ if( opMode == RF_OPMODE_TRANSMITTER )
+ {
+ SX1276SetAntSw( 1 );
+ }
+ else
+ {
+ SX1276SetAntSw( 0 );
+ }
+ }
+ SX1276Write( REG_OPMODE, ( SX1276Read( REG_OPMODE ) & RF_OPMODE_MASK ) | opMode );
+}
+
+void SX1276SetModem( RadioModems_t modem )
+{
+
+ if( SX1276.Settings.Modem == modem )
+ {
+ return;
+ }
+
+ SX1276.Settings.Modem = modem;
+ switch( SX1276.Settings.Modem )
+ {
+ default:
+ case MODEM_FSK:
+ SX1276SetOpMode( RF_OPMODE_SLEEP );
+ SX1276Write( REG_OPMODE, ( SX1276Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_MASK ) | RFLR_OPMODE_LONGRANGEMODE_OFF );
+
+ SX1276Write( REG_DIOMAPPING1, 0x00 );
+ SX1276Write( REG_DIOMAPPING2, 0x30 ); // DIO5=ModeReady
+ break;
+ case MODEM_LORA:
+ SX1276SetOpMode( RF_OPMODE_SLEEP );
+ SX1276Write( REG_OPMODE, ( SX1276Read( REG_OPMODE ) & RFLR_OPMODE_LONGRANGEMODE_MASK ) | RFLR_OPMODE_LONGRANGEMODE_ON );
+
+ SX1276Write( REG_DIOMAPPING1, 0x00 );
+ SX1276Write( REG_DIOMAPPING2, 0x00 );
+ break;
+ }
+}
+
+void SX1276Write( uint8_t addr, uint8_t data )
+{
+ SX1276WriteBuffer( addr, &data, 1 );
+}
+
+uint8_t SX1276Read( uint8_t addr )
+{
+ uint8_t data;
+ SX1276ReadBuffer( addr, &data, 1 );
+ return data;
+}
+
+void SX1276WriteBuffer( uint8_t addr, uint8_t *buffer, uint8_t size )
+{
+ uint8_t i;
+
+ hal_gpio_write(RADIO_NSS, 0);
+
+ hal_spi_tx_val(RADIO_SPI_IDX, addr | 0x80);
+ for( i = 0; i < size; i++ )
+ {
+ hal_spi_tx_val(RADIO_SPI_IDX, buffer[i]);
+ }
+
+ hal_gpio_write(RADIO_NSS, 1);
+}
+
+void SX1276ReadBuffer( uint8_t addr, uint8_t *buffer, uint8_t size )
+{
+ uint8_t i;
+
+ hal_gpio_write(RADIO_NSS, 0);
+
+ hal_spi_tx_val(RADIO_SPI_IDX, addr & 0x7f);
+ for( i = 0; i < size; i++ )
+ {
+ buffer[i] = hal_spi_tx_val(RADIO_SPI_IDX, 0);
+ }
+
+ hal_gpio_write(RADIO_NSS, 1);
+}
+
+void SX1276WriteFifo( uint8_t *buffer, uint8_t size )
+{
+ SX1276WriteBuffer( 0, buffer, size );
+}
+
+void SX1276ReadFifo( uint8_t *buffer, uint8_t size )
+{
+ SX1276ReadBuffer( 0, buffer, size );
+}
+
+void SX1276SetMaxPayloadLength( RadioModems_t modem, uint8_t max )
+{
+ SX1276SetModem( modem );
+
+ switch( modem )
+ {
+ case MODEM_FSK:
+ if( SX1276.Settings.Fsk.FixLen == false )
+ {
+ SX1276Write( REG_PAYLOADLENGTH, max );
+ }
+ break;
+ case MODEM_LORA:
+ SX1276Write( REG_LR_PAYLOADMAXLENGTH, max );
+ break;
+ }
+}
+
+void SX1276OnTimeoutIrq(void *unused)
+{
+ switch( SX1276.Settings.State )
+ {
+ case RF_RX_RUNNING:
+ if( SX1276.Settings.Modem == MODEM_FSK )
+ {
+ SX1276.Settings.FskPacketHandler.PreambleDetected = false;
+ SX1276.Settings.FskPacketHandler.SyncWordDetected = false;
+ SX1276.Settings.FskPacketHandler.NbBytes = 0;
+ SX1276.Settings.FskPacketHandler.Size = 0;
+
+ // Clear Irqs
+ SX1276Write( REG_IRQFLAGS1, RF_IRQFLAGS1_RSSI |
+ RF_IRQFLAGS1_PREAMBLEDETECT |
+ RF_IRQFLAGS1_SYNCADDRESSMATCH );
+ SX1276Write( REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN );
+
+ if( SX1276.Settings.Fsk.RxContinuous == true )
+ {
+ // Continuous mode restart Rx chain
+ SX1276Write( REG_RXCONFIG, SX1276Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+ assert(rx_timeout_sync_delay != (uint32_t)-1);
+ os_cputime_timer_relative(
+ &RxTimeoutSyncWord, rx_timeout_sync_delay*1000);
+ }
+ else
+ {
+ SX1276.Settings.State = RF_IDLE;
+ os_cputime_timer_stop(&RxTimeoutSyncWord);
+ }
+ }
+ SX1276RxTimeout( );
+ break;
+ case RF_TX_RUNNING:
+ SX1276.Settings.State = RF_IDLE;
+ SX1276TxTimeout( );
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276OnDio0Irq(void *unused)
+{
+ volatile uint8_t irqFlags = 0;
+
+ switch( SX1276.Settings.State )
+ {
+ case RF_RX_RUNNING:
+ //TimerStop( &RxTimeoutTimer );
+ // RxDone interrupt
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ if( SX1276.Settings.Fsk.CrcOn == true )
+ {
+ irqFlags = SX1276Read( REG_IRQFLAGS2 );
+ if( ( irqFlags & RF_IRQFLAGS2_CRCOK ) != RF_IRQFLAGS2_CRCOK )
+ {
+ // Clear Irqs
+ SX1276Write( REG_IRQFLAGS1, RF_IRQFLAGS1_RSSI |
+ RF_IRQFLAGS1_PREAMBLEDETECT |
+ RF_IRQFLAGS1_SYNCADDRESSMATCH );
+ SX1276Write( REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN );
+
+ os_cputime_timer_stop(&RxTimeoutTimer);
+
+ if( SX1276.Settings.Fsk.RxContinuous == false )
+ {
+ os_cputime_timer_stop(&RxTimeoutSyncWord);
+ SX1276.Settings.State = RF_IDLE;
+ }
+ else
+ {
+ // Continuous mode restart Rx chain
+ SX1276Write( REG_RXCONFIG, SX1276Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+ assert(rx_timeout_sync_delay != (uint32_t)-1);
+ os_cputime_timer_relative(
+ &RxTimeoutSyncWord, rx_timeout_sync_delay*1000);
+ }
+
+ SX1276RxError( );
+ SX1276.Settings.FskPacketHandler.PreambleDetected = false;
+ SX1276.Settings.FskPacketHandler.SyncWordDetected = false;
+ SX1276.Settings.FskPacketHandler.NbBytes = 0;
+ SX1276.Settings.FskPacketHandler.Size = 0;
+ break;
+ }
+ }
+
+ // Read received packet size
+ if( ( SX1276.Settings.FskPacketHandler.Size == 0 ) && ( SX1276.Settings.FskPacketHandler.NbBytes == 0 ) )
+ {
+ if( SX1276.Settings.Fsk.FixLen == false )
+ {
+ SX1276ReadFifo( ( uint8_t* )&SX1276.Settings.FskPacketHandler.Size, 1 );
+ }
+ else
+ {
+ SX1276.Settings.FskPacketHandler.Size = SX1276Read( REG_PAYLOADLENGTH );
+ }
+ SX1276ReadFifo( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes, SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes );
+ SX1276.Settings.FskPacketHandler.NbBytes += ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes );
+ }
+ else
+ {
+ SX1276ReadFifo( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes, SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes );
+ SX1276.Settings.FskPacketHandler.NbBytes += ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes );
+ }
+
+ if( SX1276.Settings.Fsk.RxContinuous == false )
+ {
+ SX1276.Settings.State = RF_IDLE;
+ assert(rx_timeout_sync_delay != (uint32_t)-1);
+ os_cputime_timer_relative(
+ &RxTimeoutSyncWord, rx_timeout_sync_delay*1000);
+
+ }
+ else
+ {
+ // Continuous mode restart Rx chain
+ SX1276Write( REG_RXCONFIG, SX1276Read( REG_RXCONFIG ) | RF_RXCONFIG_RESTARTRXWITHOUTPLLLOCK );
+ }
+ os_cputime_timer_stop(&RxTimeoutTimer);
+
+ SX1276RxDone( RxTxBuffer, SX1276.Settings.FskPacketHandler.Size, SX1276.Settings.FskPacketHandler.RssiValue, 0 );
+ SX1276.Settings.FskPacketHandler.PreambleDetected = false;
+ SX1276.Settings.FskPacketHandler.SyncWordDetected = false;
+ SX1276.Settings.FskPacketHandler.NbBytes = 0;
+ SX1276.Settings.FskPacketHandler.Size = 0;
+ break;
+ case MODEM_LORA:
+ {
+ int8_t snr = 0;
+
+ // Clear Irq
+ SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_RXDONE);
+
+ irqFlags = SX1276Read( REG_LR_IRQFLAGS );
+ if( ( irqFlags & RFLR_IRQFLAGS_PAYLOADCRCERROR_MASK ) == RFLR_IRQFLAGS_PAYLOADCRCERROR )
+ {
+ // Clear Irq
+ SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_PAYLOADCRCERROR);
+
+ if( SX1276.Settings.LoRa.RxContinuous == false )
+ {
+ SX1276.Settings.State = RF_IDLE;
+ }
+ os_cputime_timer_stop(&RxTimeoutTimer);
+
+ SX1276RxError( );
+ break;
+ }
+
+ SX1276.Settings.LoRaPacketHandler.SnrValue = SX1276Read( REG_LR_PKTSNRVALUE );
+ if( SX1276.Settings.LoRaPacketHandler.SnrValue & 0x80 ) // The SNR sign bit is 1
+ {
+ // Invert and divide by 4
+ snr = ( ( ~SX1276.Settings.LoRaPacketHandler.SnrValue + 1 ) & 0xFF ) >> 2;
+ snr = -snr;
+ }
+ else
+ {
+ // Divide by 4
+ snr = ( SX1276.Settings.LoRaPacketHandler.SnrValue & 0xFF ) >> 2;
+ }
+
+ int16_t rssi = SX1276Read( REG_LR_PKTRSSIVALUE );
+ if( snr < 0 )
+ {
+ if( SX1276.Settings.Channel > RF_MID_BAND_THRESH )
+ {
+ SX1276.Settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_HF + rssi + ( rssi >> 4 ) +
+ snr;
+ }
+ else
+ {
+ SX1276.Settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_LF + rssi + ( rssi >> 4 ) +
+ snr;
+ }
+ }
+ else
+ {
+ if( SX1276.Settings.Channel > RF_MID_BAND_THRESH )
+ {
+ SX1276.Settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_HF + rssi + ( rssi >> 4 );
+ }
+ else
+ {
+ SX1276.Settings.LoRaPacketHandler.RssiValue = RSSI_OFFSET_LF + rssi + ( rssi >> 4 );
+ }
+ }
+
+ SX1276.Settings.LoRaPacketHandler.Size = SX1276Read( REG_LR_RXNBBYTES );
+ SX1276ReadFifo( RxTxBuffer, SX1276.Settings.LoRaPacketHandler.Size );
+
+ if( SX1276.Settings.LoRa.RxContinuous == false )
+ {
+ SX1276.Settings.State = RF_IDLE;
+ }
+ os_cputime_timer_stop(&RxTimeoutTimer);
+
+ SX1276RxDone( RxTxBuffer, SX1276.Settings.LoRaPacketHandler.Size, SX1276.Settings.LoRaPacketHandler.RssiValue, SX1276.Settings.LoRaPacketHandler.SnrValue );
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case RF_TX_RUNNING:
+ os_cputime_timer_stop(&TxTimeoutTimer);
+ // TxDone interrupt
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_LORA:
+ // Clear Irq
+ SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_TXDONE );
+ // Intentional fall through
+ case MODEM_FSK:
+ default:
+ SX1276.Settings.State = RF_IDLE;
+ SX1276TxDone( );
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276OnDio1Irq(void *unused)
+{
+ switch( SX1276.Settings.State )
+ {
+ case RF_RX_RUNNING:
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ // FifoLevel interrupt
+ // Read received packet size
+ if( ( SX1276.Settings.FskPacketHandler.Size == 0 ) && ( SX1276.Settings.FskPacketHandler.NbBytes == 0 ) )
+ {
+ if( SX1276.Settings.Fsk.FixLen == false )
+ {
+ SX1276ReadFifo( ( uint8_t* )&SX1276.Settings.FskPacketHandler.Size, 1 );
+ }
+ else
+ {
+ SX1276.Settings.FskPacketHandler.Size = SX1276Read( REG_PAYLOADLENGTH );
+ }
+ }
+
+ if( ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ) > SX1276.Settings.FskPacketHandler.FifoThresh )
+ {
+ SX1276ReadFifo( ( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes ), SX1276.Settings.FskPacketHandler.FifoThresh );
+ SX1276.Settings.FskPacketHandler.NbBytes += SX1276.Settings.FskPacketHandler.FifoThresh;
+ }
+ else
+ {
+ SX1276ReadFifo( ( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes ), SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes );
+ SX1276.Settings.FskPacketHandler.NbBytes += ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes );
+ }
+ break;
+ case MODEM_LORA:
+ // Sync time out
+ os_cputime_timer_stop(&RxTimeoutTimer);
+ SX1276.Settings.State = RF_IDLE;
+ SX1276RxTimeout( );
+ break;
+ default:
+ break;
+ }
+ break;
+ case RF_TX_RUNNING:
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ // FifoEmpty interrupt
+ if( ( SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes ) > SX1276.Settings.FskPacketHandler.ChunkSize )
+ {
+ SX1276WriteFifo( ( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes ), SX1276.Settings.FskPacketHandler.ChunkSize );
+ SX1276.Settings.FskPacketHandler.NbBytes += SX1276.Settings.FskPacketHandler.ChunkSize;
+ }
+ else
+ {
+ // Write the last chunk of data
+ SX1276WriteFifo( RxTxBuffer + SX1276.Settings.FskPacketHandler.NbBytes, SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes );
+ SX1276.Settings.FskPacketHandler.NbBytes += SX1276.Settings.FskPacketHandler.Size - SX1276.Settings.FskPacketHandler.NbBytes;
+ }
+ break;
+ case MODEM_LORA:
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276OnDio2Irq(void *unused)
+{
+ switch( SX1276.Settings.State )
+ {
+ case RF_RX_RUNNING:
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ if( ( SX1276.Settings.FskPacketHandler.PreambleDetected == true ) && ( SX1276.Settings.FskPacketHandler.SyncWordDetected == false ) )
+ {
+ os_cputime_timer_stop(&RxTimeoutSyncWord);
+
+ SX1276.Settings.FskPacketHandler.SyncWordDetected = true;
+
+ SX1276.Settings.FskPacketHandler.RssiValue = -( SX1276Read( REG_RSSIVALUE ) >> 1 );
+
+ SX1276.Settings.FskPacketHandler.AfcValue = ( int32_t )( double )( ( ( uint16_t )SX1276Read( REG_AFCMSB ) << 8 ) |
+ ( uint16_t )SX1276Read( REG_AFCLSB ) ) *
+ ( double )FREQ_STEP;
+ SX1276.Settings.FskPacketHandler.RxGain = ( SX1276Read( REG_LNA ) >> 5 ) & 0x07;
+ }
+ break;
+ case MODEM_LORA:
+ if( SX1276.Settings.LoRa.FreqHopOn == true )
+ {
+ // Clear Irq
+ SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL);
+
+ if( ( RadioEvents != NULL ) && ( RadioEvents->FhssChangeChannel != NULL ) )
+ {
+ RadioEvents->FhssChangeChannel( ( SX1276Read( REG_LR_HOPCHANNEL ) & RFLR_HOPCHANNEL_CHANNEL_MASK ) );
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case RF_TX_RUNNING:
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ break;
+ case MODEM_LORA:
+ if( SX1276.Settings.LoRa.FreqHopOn == true )
+ {
+ // Clear Irq
+ SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_FHSSCHANGEDCHANNEL);
+
+ if( ( RadioEvents != NULL ) && ( RadioEvents->FhssChangeChannel != NULL ) )
+ {
+ RadioEvents->FhssChangeChannel( ( SX1276Read( REG_LR_HOPCHANNEL ) & RFLR_HOPCHANNEL_CHANNEL_MASK ) );
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276OnDio3Irq(void *unused)
+{
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ break;
+ case MODEM_LORA:
+ if( ( SX1276Read( REG_LR_IRQFLAGS ) & RFLR_IRQFLAGS_CADDETECTED ) == RFLR_IRQFLAGS_CADDETECTED )
+ {
+ // Clear Irq
+ SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_CADDETECTED | RFLR_IRQFLAGS_CADDONE);
+ if( ( RadioEvents != NULL ) && ( RadioEvents->CadDone != NULL ) )
+ {
+ RadioEvents->CadDone( true );
+ }
+ }
+ else
+ {
+ // Clear Irq
+ SX1276Write( REG_LR_IRQFLAGS, RFLR_IRQFLAGS_CADDONE);
+ if( ( RadioEvents != NULL ) && ( RadioEvents->CadDone != NULL ) )
+ {
+ RadioEvents->CadDone( false );
+ }
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276OnDio4Irq(void *unused)
+{
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ {
+ if( SX1276.Settings.FskPacketHandler.PreambleDetected == false )
+ {
+ SX1276.Settings.FskPacketHandler.PreambleDetected = true;
+ }
+ }
+ break;
+ case MODEM_LORA:
+ break;
+ default:
+ break;
+ }
+}
+
+void SX1276OnDio5Irq(void *unused)
+{
+ switch( SX1276.Settings.Modem )
+ {
+ case MODEM_FSK:
+ break;
+ case MODEM_LORA:
+ break;
+ default:
+ break;
+ }
+}
http://git-wip-us.apache.org/repos/asf/incubator-mynewt-core/blob/9986f68c/hw/drivers/lora/node/radio/sx1276/src/sx1276.h
----------------------------------------------------------------------
diff --git a/hw/drivers/lora/node/radio/sx1276/src/sx1276.h b/hw/drivers/lora/node/radio/sx1276/src/sx1276.h
new file mode 100644
index 0000000..9c82652
--- /dev/null
+++ b/hw/drivers/lora/node/radio/sx1276/src/sx1276.h
@@ -0,0 +1,364 @@
+/*
+ / _____) _ | |
+( (____ _____ ____ _| |_ _____ ____| |__
+ \____ \| ___ | (_ _) ___ |/ ___) _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+ (C)2013 Semtech
+
+Description: Generic SX1276 driver implementation
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainer: Miguel Luis and Gregory Cristian
+*/
+#ifndef __SX1276_H__
+#define __SX1276_H__
+#include <stdint.h>
+#include <stdbool.h>
+#include "node/radio.h"
+#include "sx1276Regs-Fsk.h"
+#include "sx1276Regs-LoRa.h"
+
+/*!
+ * Radio FSK modem parameters
+ */
+typedef struct
+{
+ int8_t Power;
+ uint32_t Fdev;
+ uint32_t Bandwidth;
+ uint32_t BandwidthAfc;
+ uint32_t Datarate;
+ uint16_t PreambleLen;
+ bool FixLen;
+ uint8_t PayloadLen;
+ bool CrcOn;
+ bool IqInverted;
+ bool RxContinuous;
+ uint32_t TxTimeout;
+}RadioFskSettings_t;
+
+/*!
+ * Radio FSK packet handler state
+ */
+typedef struct
+{
+ uint8_t PreambleDetected;
+ uint8_t SyncWordDetected;
+ int8_t RssiValue;
+ int32_t AfcValue;
+ uint8_t RxGain;
+ uint16_t Size;
+ uint16_t NbBytes;
+ uint8_t FifoThresh;
+ uint8_t ChunkSize;
+}RadioFskPacketHandler_t;
+
+/*!
+ * Radio LoRa modem parameters
+ */
+typedef struct
+{
+ int8_t Power;
+ uint32_t Bandwidth;
+ uint32_t Datarate;
+ bool LowDatarateOptimize;
+ uint8_t Coderate;
+ uint16_t PreambleLen;
+ bool FixLen;
+ uint8_t PayloadLen;
+ bool CrcOn;
+ bool FreqHopOn;
+ uint8_t HopPeriod;
+ bool IqInverted;
+ bool RxContinuous;
+ uint32_t TxTimeout;
+}RadioLoRaSettings_t;
+
+/*!
+ * Radio LoRa packet handler state
+ */
+typedef struct
+{
+ int8_t SnrValue;
+ int16_t RssiValue;
+ uint8_t Size;
+}RadioLoRaPacketHandler_t;
+
+/*!
+ * Radio Settings
+ */
+typedef struct
+{
+ RadioState_t State;
+ RadioModems_t Modem;
+ uint32_t Channel;
+ RadioFskSettings_t Fsk;
+ RadioFskPacketHandler_t FskPacketHandler;
+ RadioLoRaSettings_t LoRa;
+ RadioLoRaPacketHandler_t LoRaPacketHandler;
+}RadioSettings_t;
+
+/*!
+ * Radio hardware and global parameters
+ */
+typedef struct SX1276_s
+{
+ RadioSettings_t Settings;
+}SX1276_t;
+
+/*!
+ * Hardware IO IRQ callback function definition
+ */
+typedef void ( DioIrqHandler )(void *arg);
+
+/*!
+ * SX1276 definitions
+ */
+#define XTAL_FREQ 32000000
+#define FREQ_STEP 61.03515625
+
+#define RX_BUFFER_SIZE 256
+
+/*!
+ * ============================================================================
+ * Public functions prototypes
+ * ============================================================================
+ */
+
+/*!
+ * \brief Initializes the radio
+ *
+ * \param [IN] events Structure containing the driver callback functions
+ */
+void SX1276Init( RadioEvents_t *events );
+
+/*!
+ * Return current radio status
+ *
+ * \param status Radio status.[RF_IDLE, RF_RX_RUNNING, RF_TX_RUNNING]
+ */
+RadioState_t SX1276GetStatus( void );
+
+/*!
+ * \brief Configures the radio with the given modem
+ *
+ * \param [IN] modem Modem to be used [0: FSK, 1: LoRa]
+ */
+void SX1276SetModem( RadioModems_t modem );
+
+/*!
+ * \brief Sets the channels configuration
+ *
+ * \param [IN] freq Channel RF frequency
+ */
+void SX1276SetChannel( uint32_t freq );
+
+/*!
+ * \brief Sets the channels configuration
+ *
+ * \param [IN] modem Radio modem to be used [0: FSK, 1: LoRa]
+ * \param [IN] freq Channel RF frequency
+ * \param [IN] rssiThresh RSSI threshold
+ *
+ * \retval isFree [true: Channel is free, false: Channel is not free]
+ */
+bool SX1276IsChannelFree( RadioModems_t modem, uint32_t freq, int16_t rssiThresh );
+
+/*!
+ * \brief Generates a 32 bits random value based on the RSSI readings
+ *
+ * \remark This function sets the radio in LoRa modem mode and disables
+ * all interrupts.
+ * After calling this function either SX1276SetRxConfig or
+ * SX1276SetTxConfig functions must be called.
+ *
+ * \retval randomValue 32 bits random value
+ */
+uint32_t SX1276Random( void );
+
+/*!
+ * \brief Sets the reception parameters
+ *
+ * \remark When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported
+ *
+ * \param [IN] modem Radio modem to be used [0: FSK, 1: LoRa]
+ * \param [IN] bandwidth Sets the bandwidth
+ * FSK : >= 2600 and <= 250000 Hz
+ * LoRa: [0: 125 kHz, 1: 250 kHz,
+ * 2: 500 kHz, 3: Reserved]
+ * \param [IN] datarate Sets the Datarate
+ * FSK : 600..300000 bits/s
+ * LoRa: [6: 64, 7: 128, 8: 256, 9: 512,
+ * 10: 1024, 11: 2048, 12: 4096 chips]
+ * \param [IN] coderate Sets the coding rate (LoRa only)
+ * FSK : N/A ( set to 0 )
+ * LoRa: [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8]
+ * \param [IN] bandwidthAfc Sets the AFC Bandwidth (FSK only)
+ * FSK : >= 2600 and <= 250000 Hz
+ * LoRa: N/A ( set to 0 )
+ * \param [IN] preambleLen Sets the Preamble length
+ * FSK : Number of bytes
+ * LoRa: Length in symbols (the hardware adds 4 more symbols)
+ * \param [IN] symbTimeout Sets the RxSingle timeout value (LoRa only)
+ * FSK : N/A ( set to 0 )
+ * LoRa: timeout in symbols
+ * \param [IN] fixLen Fixed length packets [0: variable, 1: fixed]
+ * \param [IN] payloadLen Sets payload length when fixed lenght is used
+ * \param [IN] crcOn Enables/Disables the CRC [0: OFF, 1: ON]
+ * \param [IN] FreqHopOn Enables disables the intra-packet frequency hopping
+ * FSK : N/A ( set to 0 )
+ * LoRa: [0: OFF, 1: ON]
+ * \param [IN] HopPeriod Number of symbols bewteen each hop
+ * FSK : N/A ( set to 0 )
+ * LoRa: Number of symbols
+ * \param [IN] iqInverted Inverts IQ signals (LoRa only)
+ * FSK : N/A ( set to 0 )
+ * LoRa: [0: not inverted, 1: inverted]
+ * \param [IN] rxContinuous Sets the reception in continuous mode
+ * [false: single mode, true: continuous mode]
+ */
+void SX1276SetRxConfig( 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 );
+
+/*!
+ * \brief Sets the transmission parameters
+ *
+ * \remark When using LoRa modem only bandwidths 125, 250 and 500 kHz are supported
+ *
+ * \param [IN] modem Radio modem to be used [0: FSK, 1: LoRa]
+ * \param [IN] power Sets the output power [dBm]
+ * \param [IN] fdev Sets the frequency deviation (FSK only)
+ * FSK : [Hz]
+ * LoRa: 0
+ * \param [IN] bandwidth Sets the bandwidth (LoRa only)
+ * FSK : 0
+ * LoRa: [0: 125 kHz, 1: 250 kHz,
+ * 2: 500 kHz, 3: Reserved]
+ * \param [IN] datarate Sets the Datarate
+ * FSK : 600..300000 bits/s
+ * LoRa: [6: 64, 7: 128, 8: 256, 9: 512,
+ * 10: 1024, 11: 2048, 12: 4096 chips]
+ * \param [IN] coderate Sets the coding rate (LoRa only)
+ * FSK : N/A ( set to 0 )
+ * LoRa: [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8]
+ * \param [IN] preambleLen Sets the preamble length
+ * FSK : Number of bytes
+ * LoRa: Length in symbols (the hardware adds 4 more symbols)
+ * \param [IN] fixLen Fixed length packets [0: variable, 1: fixed]
+ * \param [IN] crcOn Enables disables the CRC [0: OFF, 1: ON]
+ * \param [IN] FreqHopOn Enables disables the intra-packet frequency hopping
+ * FSK : N/A ( set to 0 )
+ * LoRa: [0: OFF, 1: ON]
+ * \param [IN] HopPeriod Number of symbols bewteen each hop
+ * FSK : N/A ( set to 0 )
+ * LoRa: Number of symbols
+ * \param [IN] iqInverted Inverts IQ signals (LoRa only)
+ * FSK : N/A ( set to 0 )
+ * LoRa: [0: not inverted, 1: inverted]
+ * \param [IN] timeout Transmission timeout [ms]
+ */
+void SX1276SetTxConfig( 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 );
+
+/*!
+ * \brief Computes the packet time on air in us for the given payload
+ *
+ * \Remark Can only be called once SetRxConfig or SetTxConfig have been called
+ *
+ * \param [IN] modem Radio modem to be used [0: FSK, 1: LoRa]
+ * \param [IN] pktLen Packet payload length
+ *
+ * \retval airTime Computed airTime (us) for the given packet payload length
+ */
+uint32_t SX1276GetTimeOnAir( RadioModems_t modem, uint8_t pktLen );
+
+/*!
+ * \brief Sends the buffer of size. Prepares the packet to be sent and sets
+ * the radio in transmission
+ *
+ * \param [IN]: buffer Buffer pointer
+ * \param [IN]: size Buffer size
+ */
+void SX1276Send( uint8_t *buffer, uint8_t size );
+
+/*!
+ * \brief Sets the radio in sleep mode
+ */
+void SX1276SetSleep( void );
+
+/*!
+ * \brief Sets the radio in standby mode
+ */
+void SX1276SetStby( void );
+
+/*!
+ * \brief Sets the radio in reception mode for the given time
+ * \param [IN] timeout Reception timeout [ms] [0: continuous, others timeout]
+ */
+void SX1276SetRx( uint32_t timeout );
+
+/*!
+ * \brief Start a Channel Activity Detection
+ */
+void SX1276StartCad( void );
+
+/*!
+ * \brief Reads the current RSSI value
+ *
+ * \retval rssiValue Current RSSI value in [dBm]
+ */
+int16_t SX1276ReadRssi( RadioModems_t modem );
+
+/*!
+ * \brief Writes the radio register at the specified address
+ *
+ * \param [IN]: addr Register address
+ * \param [IN]: data New register value
+ */
+void SX1276Write( uint8_t addr, uint8_t data );
+
+/*!
+ * \brief Reads the radio register at the specified address
+ *
+ * \param [IN]: addr Register address
+ * \retval data Register value
+ */
+uint8_t SX1276Read( uint8_t addr );
+
+/*!
+ * \brief Writes multiple radio registers starting at address
+ *
+ * \param [IN] addr First Radio register address
+ * \param [IN] buffer Buffer containing the new register's values
+ * \param [IN] size Number of registers to be written
+ */
+void SX1276WriteBuffer( uint8_t addr, uint8_t *buffer, uint8_t size );
+
+/*!
+ * \brief Reads multiple radio registers starting at address
+ *
+ * \param [IN] addr First Radio register address
+ * \param [OUT] buffer Buffer where to copy the registers data
+ * \param [IN] size Number of registers to be read
+ */
+void SX1276ReadBuffer( uint8_t addr, uint8_t *buffer, uint8_t size );
+
+/*!
+ * \brief Sets the maximum payload length.
+ *
+ * \param [IN] modem Radio modem to be used [0: FSK, 1: LoRa]
+ * \param [IN] max Maximum payload length in bytes
+ */
+void SX1276SetMaxPayloadLength( RadioModems_t modem, uint8_t max );
+
+#endif // __SX1276_H__