add SPI driver for semtech sx128x chips (#864)

* add SPI driver for semtech sx128x chips

Co-authored-by: Copilot <copilot@github.com>

* handle busy loop better

* switch to time based busy timeout

Co-authored-by: Copilot <copilot@github.com>

* comment functions

* start on using types for function inputs

* use types where applicable and align with datasheet more

Co-authored-by: Copilot <copilot@github.com>

* work on exporting less constants

* only export "actionable" errors

* combine identical constants

* add crude lora rx and tx examples

* change from type aliases to local types

---------

Co-authored-by: Copilot <copilot@github.com>
This commit is contained in:
Joel Wetzell
2026-05-04 07:42:03 -05:00
committed by GitHub
parent 8f372935ac
commit 62663c1832
8 changed files with 1473 additions and 0 deletions
+768
View File
@@ -0,0 +1,768 @@
package sx128x
import (
"runtime"
"time"
"tinygo.org/x/drivers"
"tinygo.org/x/drivers/internal/pin"
)
type Device struct {
spi drivers.SPI
nssPin pin.Output
resetPin pin.Output
busyPin pin.Input
spiTxBuf []byte
spiRxBuf []byte
}
func New(spi drivers.SPI, nssPin pin.Output, resetPin pin.Output, busyPin pin.Input) *Device {
return &Device{
spi: spi,
nssPin: nssPin,
resetPin: resetPin,
busyPin: busyPin,
spiTxBuf: make([]byte, 256), // TODO: optimize buffer size
spiRxBuf: make([]byte, 256),
}
}
func (d *Device) Reset() {
d.resetPin.Set(false)
time.Sleep(10 * time.Millisecond)
d.resetPin.Set(true)
time.Sleep(10 * time.Millisecond)
}
func (d *Device) WaitWhileBusy(timeout time.Duration) error {
// largest busy period is on boot with around ~400ish this should be more than enough
now := time.Now()
for d.busyPin.Get() {
if time.Since(now) > timeout {
return ErrBusyPinTimeout
}
runtime.Gosched()
}
return nil
}
// Get tranceiver status, returns circuit mode and command status
func (d *Device) GetStatus() (CircuitMode, CommandStatus, error) {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return 0, 0, err
}
d.nssPin.Set(false)
status, err := d.spi.Transfer(cmdGetStatus)
d.nssPin.Set(true)
if err != nil {
return 0, 0, err
}
circuitMode := (status & circuitModeMask) >> 5
commandStatus := (status & commandStatusMask) >> 2
return CircuitMode(circuitMode), CommandStatus(commandStatus), nil
}
func (d *Device) WriteRegister(addr uint16, data []byte) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdWriteRegister, uint8((addr>>8)&0xFF), uint8(addr&0xFF))
d.spiTxBuf = append(d.spiTxBuf, data...)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
func (d *Device) ReadRegister(addr uint16) (uint8, error) {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return 0, err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdReadRegister, uint8((addr&0xFF00)>>8), uint8(addr&0x00FF), 0x00, 0x00)
d.spiRxBuf = d.spiRxBuf[:5]
err = d.spi.Tx(d.spiTxBuf, d.spiRxBuf)
d.nssPin.Set(true)
if err != nil {
return 0, err
}
return d.spiRxBuf[4], nil
}
func (d *Device) WriteBuffer(offset uint8, data []byte) error {
if len(data) > 256 {
return errDataTooLong
}
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdWriteBuffer, offset)
d.spiTxBuf = append(d.spiTxBuf, data...)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Read data from the payload buffer starting at the given offset with the given length
func (d *Device) ReadBuffer(offset uint8, length uint8) ([]byte, error) {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return nil, err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdReadBuffer, offset, 0x00)
for i := uint8(0); i < length; i++ {
d.spiTxBuf = append(d.spiTxBuf, 0x00)
}
d.spiRxBuf = d.spiRxBuf[:len(d.spiTxBuf)]
err = d.spi.Tx(d.spiTxBuf, d.spiRxBuf)
d.nssPin.Set(true)
if err != nil {
return nil, err
}
return d.spiRxBuf[3:], nil
}
// Set the device into sleep mode with the given configuration: 0 (no retention), 1 (ram retentation), 2 (buffer retention) or 3 (ram and buffer retention)
func (d *Device) SetSleep(sleepConfig SleepConfig) error {
if sleepConfig > (SLEEP_DATA_BUFFER_RETAIN | SLEEP_DATA_RAM_RETAIN) {
return errInvalidSleepConfig
}
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetSleep, uint8(sleepConfig))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Put device into standby mode, 0 (RC) or 1 (XOSC)
func (d *Device) SetStandby(standbyConfig StandbyConfig) error {
if standbyConfig > STANDBY_XOSC { // XOSC is the highest standby config anything higher is invalid
return errInvalidStandbyConfig
}
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetStandby, uint8(standbyConfig))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Set the device into Frequency Synthesizer mode
func (d *Device) SetFs() error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetFS)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
func checkPeriodBase(periodBase PeriodBase) error {
if periodBase > PERIOD_BASE_4_MS { // 4ms is the highest period base anything higher is invalid
return errInvalidPeriodBase
}
return nil
}
// Sets the device in transmit mode, the IRQ status should be cleared before using this command
// timout is determined by periodBase * periodBaseCount
func (d *Device) SetTx(periodBase PeriodBase, periodBaseCount uint16) error {
err := checkPeriodBase(periodBase)
if err != nil {
return err
}
err = d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetTx, uint8(periodBase), uint8((periodBaseCount>>8)&0xFF), uint8(periodBaseCount&0xFF))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Sets the device in receive mode, the IRQ status should be cleared before using this command
// timeout is determined by periodBase * periodBaseCount
func (d *Device) SetRx(periodBase PeriodBase, periodBaseCount uint16) error {
err := checkPeriodBase(periodBase)
if err != nil {
return err
}
err = d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetRx, uint8(periodBase), uint8((periodBaseCount>>8)&0xFF), uint8(periodBaseCount&0xFF))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Sets the device in a continuous receive mode, it enters receive mode with a timeout of periodBase * rxPeriodBaseCount.
// If no packet is received it will enter sleep mode for periodBase * sleepPeriodBaseCount before re-entering receive mode.
// The loop is exited when a packet is received or the device is put into standby mode.
func (d *Device) SetRxDutyCycle(periodBase PeriodBase, rxPeriodBaseCount uint16, sleepPeriodBaseCount uint16) error {
err := checkPeriodBase(periodBase)
if err != nil {
return err
}
err = d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetRxDutyCycle, uint8(periodBase), uint8((rxPeriodBaseCount&0xFF00)>>8), uint8(rxPeriodBaseCount&0x00FF))
d.spiTxBuf = append(d.spiTxBuf, uint8((sleepPeriodBaseCount&0xFF00)>>8), uint8(sleepPeriodBaseCount&0x00FF))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Sets the transceiver into Long Preamble mode, and can only be used with either the LoRa mode and GFSK mode
func (d *Device) SetLongPreamble(enable bool) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetLongPreamble)
if enable {
d.spiTxBuf = append(d.spiTxBuf, 1)
} else {
d.spiTxBuf = append(d.spiTxBuf, 0)
}
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Channel activity detection (CAD) is a LoRa specific mode of operation where the device searches for a LoRa signal.
// After search has completed, the device returns to STDBY_RC mode. The length of the search is configured via the SetCadParams() command.
func (d *Device) SetCAD() error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetCAD)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Test command to generate a Continuous Wave (RF tone) at a selected frequency and output power
// The device remains in Tx Continuous Wave until the host sends a mode configuration command.
func (d *Device) SetTxContinuousWave() error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetTxContinuousWave)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Test command to generate an infinite sequence of alternating 0s and 1s in
// GFSK modulation and symbol 0 in LoRa. The device remains in transmit until the host sends a mode configuration command.
func (d *Device) SetTxContinuousPreamble() error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetContinuousPreamble)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// This command allows the transceiver to send a packet at a user programmable time after the end of a packet reception.
// This is useful for Bluetooth Low Energy (BLE) compatibility which requires the transceiver to be able to send back a response 150µs after a packet reception.
func (d *Device) SetAutoTx(timeUs uint16) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetAutoTx, uint8((timeUs&0xFF00)>>8), uint8(timeUs&0x00FF))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Modifies the chip behavior so that the state following a Rx or Tx operation is FS and not standby.
// This allows for faster transitions between Rx and/or Tx.
func (d *Device) SetAutoFs(enable bool) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetAutoFS)
if enable {
d.spiTxBuf = append(d.spiTxBuf, 1)
} else {
d.spiTxBuf = append(d.spiTxBuf, 0)
}
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Choose between GFSK, LoRa, Ranging, FLRC or BLE packet types, this will affect the available configuration parameters and the structure of the packet
func (d *Device) SetPacketType(packetType PacketType) error {
if packetType > PACKET_TYPE_BLE { // BLE is the highest packet type anything higher is invalid.
return errInvalidPacketType
}
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetPacketType, uint8(packetType))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Get the currently configured packet type, this will be 0 (GFSK), 1 (LoRa), 2 (Ranging), 3 (FLRC) or 4 (BLE)
func (d *Device) GetPacketType() (PacketType, error) {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return 0, err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdGetPacketType, 0x00, 0x00)
d.spiRxBuf = d.spiRxBuf[:3]
err = d.spi.Tx(d.spiTxBuf, d.spiRxBuf)
d.nssPin.Set(true)
if err != nil {
return 0, err
}
return PacketType(d.spiRxBuf[2]), nil
}
// Set the RF frequency in Hz, must be between 2.4 GHz and 2.5 GHz
func (d *Device) SetRfFrequency(frequencyHz uint32) error {
if frequencyHz < 2400000000 {
return errFrequencyTooLow
}
if frequencyHz > 2500000000 {
return errFrequencyTooHigh
}
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
rfFrequency := uint32((uint64(frequencyHz) << 18) / 52000000)
d.spiTxBuf = append(d.spiTxBuf, cmdSetRFFrequency, uint8((rfFrequency>>16)&0xFF), uint8((rfFrequency>>8)&0xFF), uint8(rfFrequency&0xFF))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Set the output power in dBm, must be between -18 and 13 dBm, and the ramp time
func (d *Device) SetTxParams(powerdBm int8, rampTime RadioRampTime) error {
if powerdBm < -18 {
return errPowerTooLow
}
if powerdBm > 13 {
return errPowerTooHigh
}
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
adjustedPower := uint8(powerdBm + 18)
d.spiTxBuf = append(d.spiTxBuf, cmdSetTxParams, adjustedPower, uint8(rampTime))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Set the number of symbols used for channel activity detection which determines the sensitivity of the detection.
// This is only applicable in LoRa mode.
func (d *Device) SetCadParams(cadSymbolNum uint8) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetCADParams, cadSymbolNum)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Set the base address for the internal buffer for Tx and Rx operations.
// When transmitting or receiving data is read from or written to the buffer starting at the given offset.
func (d *Device) SetBufferBaseAddress(txBase uint8, rxBase uint8) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetBufferBaseAddress, txBase, rxBase)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// The arguments to this function depend on the packet type. It is recommended to use the mode specific functions for a better experience.
// BLE & GFSK: BitrateBandwidth, ModulationIndex, ModulationShaping
// FLRC: BitrateBandwidth, CodingRate, ModulationShaping
// LoRa & Ranging: SpreadingFactor, Bandwidth, CodingRate
func (d *Device) SetModulationParams(modParam1, modParam2, modParam3 uint8) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetModulationParams, modParam1, modParam2, modParam3)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
func (d *Device) SetModulationParamsBLE(bitrateBandwidth GFSKBLEBitrateBandwidth, modulationIndex ModulationIndex, modulationShaping ModulationShaping) error {
return d.SetModulationParams(uint8(bitrateBandwidth), uint8(modulationIndex), uint8(modulationShaping))
}
func (d *Device) SetModulationParamsGFSK(bitrateBandwidth GFSKBLEBitrateBandwidth, modulationIndex ModulationIndex, modulationShaping ModulationShaping) error {
return d.SetModulationParams(uint8(bitrateBandwidth), uint8(modulationIndex), uint8(modulationShaping))
}
func (d *Device) SetModulationParamsFLRC(bitrateBandwidth FLRCBitrateBandwidth, codingRate FLRCCodingRate, modulationShaping ModulationShaping) error {
return d.SetModulationParams(uint8(bitrateBandwidth), uint8(codingRate), uint8(modulationShaping))
}
func (d *Device) SetModulationParamsLoRa(spreadingFactor LoRaSpreadingFactor, bandwidth LoRaBandwidth, codingRate LoRaCodingRate) error {
return d.SetModulationParams(uint8(spreadingFactor), uint8(bandwidth), uint8(codingRate))
}
// The arguments to this function depend on the packet type. It is recommended to use the mode specific functions for a better experience.
// GFSK & FLRC: PreambleLength, SyncWordLength, SyncWordMatch, HeaderType, PayloadLength, CrcLength, Whitening
// BLE: ConnectionState, CrcLength, BleTestPayload, Whitening
// LoRa & Ranging: PreambleLength, HeaderType, PayloadLength, CRC, InvertIQ/chirp invert
func (d *Device) SetPacketParams(param1, param2, param3, param4, param5, param6, param7 uint8) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetPacketParams, param1, param2, param3, param4, param5, param6, param7)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Set GFSK related packet parameters, this assumes the packet type is already set to GFSK.
// - payloadLength: range of 0-255
func (d *Device) SetPacketParamsGFSK(preambleLength GFSKPreambleLength, syncWordLength GFSKSyncWordLength, syncWordMatch GFSKSyncWordMatch, headerType GFSKHeaderType, payloadLength uint8, crcLength GFSKCrcType, whitening bool) error {
var whiteningVal uint8
if whitening {
whiteningVal = whiteningEnable
} else {
whiteningVal = whiteningDisable
}
return d.SetPacketParams(uint8(preambleLength), uint8(syncWordLength), uint8(syncWordMatch), uint8(headerType), payloadLength, uint8(crcLength), whiteningVal)
}
// Set FLRC related packet parameters, this assumes the packet type is already set to FLRC.
// - payloadLength: range of 6-127
func (d *Device) SetPacketParamsFLRC(preambleLength FLRCPreambleLength, syncWordLength FLRCSyncWordLength, syncWordMatch FLRCSyncWordMatch, headerType FLRCHeaderType, payloadLength uint8, crcLength FLRCCrcType) error {
if payloadLength < 6 {
return errPayloadLengthTooShort
}
if payloadLength > 127 {
return errPayloadLengthTooLong
}
return d.SetPacketParams(uint8(preambleLength), uint8(syncWordLength), uint8(syncWordMatch), uint8(headerType), payloadLength, uint8(crcLength), whiteningDisable)
}
// Set BLE related packet parameters, this assumes the packet type is already set to BLE.
func (d *Device) SetPacketParamsBLE(connectionState BLEConnectionState, crcLength BLECrcType, bleTestPayload BLETestPayload, whitening bool) error {
var whiteningVal uint8
if whitening {
whiteningVal = whiteningEnable
} else {
whiteningVal = whiteningDisable
}
return d.SetPacketParams(uint8(connectionState), uint8(crcLength), uint8(bleTestPayload), whiteningVal, 0, 0, 0)
}
// Set LoRa related packet parameters, this assumes the packet type is already set to LoRa.
// - payloadLength: range of 1-255
func (d *Device) SetPacketParamsLoRa(preambleLength uint32, headerType LoRaHeaderType, payloadLength uint8, crcType LoRaCrcType, iqType LoRaIqType) error {
if payloadLength == 0 {
return errPayloadLengthTooShort
}
exponent, mantissa := getExponentAndMantissa(preambleLength)
return d.SetPacketParams(uint8(exponent<<4)|mantissa, uint8(headerType), payloadLength, uint8(crcType), uint8(iqType), 0, 0)
}
func getExponentAndMantissa(value uint32) (uint8, uint8) {
// pulled from RadioLib https://github.com/jgromes/RadioLib/blob/master/src/modules/SX128x/SX128x.cpp
e := uint8(1)
m := uint8(1)
len := uint32(0)
for e = uint8(1); e <= 15; e++ {
for m = uint8(1); m <= 15; m++ {
len = uint32(m) * (uint32(1 << e))
if len >= value {
break
}
}
if len >= value {
break
}
}
return e, m
}
// Get information about the most recent packet received.
// Return the payload length, the offset in the buffer where the payload starts.
func (d *Device) GetRxBufferStatus() (uint8, uint8, error) {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return 0, 0, err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdGetRxBufferStatus, 0x00, 0x00, 0x00)
d.spiRxBuf = d.spiRxBuf[:4]
err = d.spi.Tx(d.spiTxBuf, d.spiRxBuf)
d.nssPin.Set(true)
if err != nil {
return 0, 0, err
}
return d.spiRxBuf[2], d.spiRxBuf[3], nil
}
// The return type of this function depends on the packet type. Use mode specific function for typed returns.
// BLE, GFSK & FLRC: unused, rssiSync, errors, status, sync
// LoRa & Ranging: rssiSync, SNR
func (d *Device) GetPacketStatus() (uint8, uint8, uint8, uint8, uint8, error) {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return 0, 0, 0, 0, 0, err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdGetPacketStatus, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
d.spiRxBuf = d.spiRxBuf[:7]
err = d.spi.Tx(d.spiTxBuf, d.spiRxBuf)
d.nssPin.Set(true)
if err != nil {
return 0, 0, 0, 0, 0, err
}
return d.spiRxBuf[2], d.spiRxBuf[3], d.spiRxBuf[4], d.spiRxBuf[5], d.spiRxBuf[6], nil
}
// Get information about the most recent GFSK packet received or transmitted:
// - RSSI of last received packet
// - packet information (each bit represents a different error or status flag)
// - whether the last packet transmission has ended
// - the sync word that was used for the last packet reception (0-3)
func (d *Device) GetPacketStatusGFSK() (float32, GFSKPacketInfo, bool, uint8, error) {
_, rssiSync, packetInfo, status, sync, err := d.GetPacketStatus()
if err != nil {
return 0, 0, false, 0, err
}
return float32(int8(rssiSync)) / 2 * -1, GFSKPacketInfo(packetInfo), status != 0, sync, nil
}
// Get information about the most recent BLE packet received or transmitted:
// - RSSI of last received packet
// - packet information (each bit represents a different error or status flag)
// - whether the last packet transmission has ended
// - the sync word that was used for the last packet reception (0-1)
func (d *Device) GetPacketStatusBLE() (float32, BLEPacketInfo, bool, uint8, error) {
_, rssiSync, packetInfo, status, sync, err := d.GetPacketStatus()
if err != nil {
return 0, 0, false, 0, err
}
return float32(int8(rssiSync)) / 2 * -1, BLEPacketInfo(packetInfo), status != 0, sync, nil
}
// Get information about the most recent BLE packet received or transmitted:
// - RSSI of last received packet
// - packet information (each bit represents a different error or status flag)
// - PID field of the received packet
// - NO_ACK field of the received packet
// - PID check status of the current packet
// - whether the last packet transmission has ended
// - the sync word that was used for the last packet reception (0-1)
func (d *Device) GetPacketStatusFLRC() (float32, FLRCPacketInfo, uint8, bool, bool, bool, uint8, error) {
_, rawRSSI, packetInfo, rxTxInfo, sync, err := d.GetPacketStatus()
rxPid := (rxTxInfo & 0b11000000) >> 6
noAck := (rxTxInfo & 0b00100000) != 0
pidCheck := (rxTxInfo & 0b00010000) != 0
txDone := (rxTxInfo & 0b00000001) != 0
if err != nil {
return 0, 0, 0, false, false, false, 0, err
}
return float32(int8(rawRSSI)) / 2 * -1, FLRCPacketInfo(packetInfo), rxPid, noAck, pidCheck, txDone, sync, nil
}
// Get information about the most recent LoRa packet received:
// - RSSI of last received packet
// - signal-to-noise ratio (SNR) of last received packet
func (d *Device) GetPacketStatusLoRa() (float32, float32, error) {
rawRSSI, rawSnr, _, _, _, err := d.GetPacketStatus()
if err != nil {
return 0, 0, err
}
return float32(int8(rawRSSI)) / 2 * -1, float32(int8(rawSnr)) / 4, nil
}
// Get the instantaneous RSSI value during reception of the packet
func (d *Device) GetRssiInst() (float32, error) {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return 0, err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdGetRSSIInst, 0x00, 0x00)
d.spiRxBuf = d.spiRxBuf[:3]
err = d.spi.Tx(d.spiTxBuf, d.spiRxBuf)
d.nssPin.Set(true)
if err != nil {
return 0, err
}
return float32(int8(d.spiRxBuf[2])) / 2 * -1, nil
}
// Configure the overall IRQ mask and the mapping of individual IRQs to the DIO1, DIO2 and DIO3 pins
func (d *Device) SetDioIrqParams(irqMask IRQMask, dio1Mask IRQMask, dio2Mask IRQMask, dio3Mask IRQMask) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetDIOIRQParams, uint8((irqMask&0xFF00)>>8), uint8(irqMask&0x00FF))
d.spiTxBuf = append(d.spiTxBuf, uint8((dio1Mask&0xFF00)>>8), uint8(dio1Mask&0x00FF))
d.spiTxBuf = append(d.spiTxBuf, uint8((dio2Mask&0xFF00)>>8), uint8(dio2Mask&0x00FF))
d.spiTxBuf = append(d.spiTxBuf, uint8((dio3Mask&0xFF00)>>8), uint8(dio3Mask&0x00FF))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Get the current IRQ status.
func (d *Device) GetIrqStatus() (IRQMask, error) {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return 0, err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdGetIRQStatus, 0x00, 0x00, 0x00)
d.spiRxBuf = d.spiRxBuf[:4]
err = d.spi.Tx(d.spiTxBuf, d.spiRxBuf)
d.nssPin.Set(true)
if err != nil {
return 0, err
}
return uint16(d.spiRxBuf[2])<<8 | uint16(d.spiRxBuf[3]), err
}
// Clear the IRQ bits specified in the irqMask.
func (d *Device) ClearIrqStatus(irqMask IRQMask) error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdClearIRQStatus, uint8((irqMask&0xFF00)>>8), uint8(irqMask&0x00FF))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Switch between the low-dropout regulator (LDO) and the DC-DC converter for internal power regulation.
func (d *Device) SetRegulatorMode(mode RegulatorMode) error {
if mode > REGULATOR_DC_DC { // DC-DC is the highest regulator mode anything higher is invalid
return errInvalidRegulatorMode
}
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetRegulatorMode, uint8(mode))
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}
// Stores the present context of the radio register values to the Data RAM which will be restored when the device wakes up from sleep mode.
func (d *Device) SetSaveContext() error {
err := d.WaitWhileBusy(time.Second)
if err != nil {
return err
}
d.nssPin.Set(false)
d.spiTxBuf = d.spiTxBuf[:0]
d.spiTxBuf = append(d.spiTxBuf, cmdSetSaveContext)
err = d.spi.Tx(d.spiTxBuf, nil)
d.nssPin.Set(true)
return err
}