mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-09-03 13:28:59 +00:00
lora: move shared config for sx126x/sx127x to single package
Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
+51
-34
@@ -8,6 +8,7 @@ import (
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"time"
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"tinygo.org/x/drivers"
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"tinygo.org/x/drivers/lora"
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)
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// SX126X radio transceiver RF_IN and RF_OUT may be connected
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@@ -55,36 +56,17 @@ const (
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type Device struct {
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spi drivers.SPI // SPI bus for module communication
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radioEventChan chan RadioEvent // Channel for Receiving events
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loraConf LoraConfig // Current Lora configuration
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loraConf lora.Config // Current Lora configuration
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rfswitch RFSwitch // RF Switch, if any
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deepSleep bool // Internal Sleep state
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deviceType int // sx1261,sx1262,sx1268 (defaults sx1261)
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spiBuffer [SPI_BUFFER_SIZE]uint8
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}
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// Config holds the LoRa configuration parameters
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type LoraConfig struct {
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Freq uint32 // Frequency
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Cr uint8 // Coding Rate
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Sf uint8 // Spread Factor
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Bw uint8 // Bandwidth
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Ldr uint8 // Low Data Rate
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Preamble uint16 // PreambleLength
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SyncWord uint16 // Sync Word
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HeaderType uint8 // Header : Implicit/explicit
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Crc uint8 // CRC : Yes/No
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Iq uint8 // iq : Standard/inverted
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LoraTxPowerDBm int8 // Tx power in Dbm
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}
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const (
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SX126X_RTC_FREQ_IN_HZ uint32 = 64000
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)
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var (
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errUndefinedLoraConf = errors.New("Undefined Lora configuration")
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)
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// --------------------------------------------------
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// Helper functions
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// --------------------------------------------------
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@@ -387,11 +369,11 @@ func (d *Device) SetPacketType(packetType uint8) {
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}
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// SetSyncWord defines the Sync Word to yse
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func (d *Device) SetSyncWord(syncword uint16) {
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func (d *Device) SetSyncWord(sw uint16) {
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var p [2]uint8
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d.loraConf.SyncWord = syncword
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p[0] = uint8((syncword >> 8) & 0xFF)
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p[1] = uint8((syncword >> 0) & 0xFF)
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d.loraConf.SyncWord = sw
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p[0] = uint8((d.loraConf.SyncWord >> 8) & 0xFF)
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p[1] = uint8((d.loraConf.SyncWord >> 0) & 0xFF)
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d.WriteRegister(SX126X_REG_LORA_SYNC_WORD_MSB, p[:])
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}
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@@ -547,9 +529,9 @@ func (d *Device) SetLoraFrequency(freq uint32) {
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// NB: Change will be applied at next RX / TX
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func (d *Device) SetLoraIqMode(mode uint8) {
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if mode == 0 {
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d.loraConf.Iq = SX126X_LORA_IQ_STANDARD
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d.loraConf.Iq = lora.IQStandard
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} else {
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d.loraConf.Iq = SX126X_LORA_IQ_INVERTED
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d.loraConf.Iq = lora.IQInverted
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}
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}
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@@ -569,9 +551,9 @@ func (d *Device) SetLoraBandwidth(bw uint8) {
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// NB: Change will be applied at next RX / TX
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func (d *Device) SetLoraCrc(enable bool) {
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if enable {
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d.loraConf.Crc = SX126X_LORA_CRC_ON
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d.loraConf.Crc = lora.CRCOn
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} else {
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d.loraConf.Crc = SX126X_LORA_CRC_OFF
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d.loraConf.Crc = lora.CRCOn
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}
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}
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@@ -587,9 +569,10 @@ func (d *Device) SetLoraSpreadingFactor(sf uint8) {
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//
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// LoraConfig() defines Lora configuration for next Lora operations
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func (d *Device) LoraConfig(cnf LoraConfig) {
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func (d *Device) LoraConfig(cnf lora.Config) {
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// Save given configuration
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d.loraConf = cnf
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d.loraConf.SyncWord = syncword(int(cnf.SyncWord))
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// Switch to standby prior to configuration changes
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d.SetStandby()
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// Clear errors, disable radio interrupts for the moment
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@@ -599,7 +582,7 @@ func (d *Device) LoraConfig(cnf LoraConfig) {
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// Define radio operation mode
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d.SetPacketType(SX126X_PACKET_TYPE_LORA)
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d.SetRfFrequency(d.loraConf.Freq)
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d.SetModulationParams(d.loraConf.Sf, d.loraConf.Bw, d.loraConf.Cr, d.loraConf.Ldr)
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d.SetModulationParams(d.loraConf.Sf, bandwidth(d.loraConf.Bw), d.loraConf.Cr, d.loraConf.Ldr)
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d.SetTxParams(d.loraConf.LoraTxPowerDBm, SX126X_PA_RAMP_200U)
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d.SetSyncWord(d.loraConf.SyncWord)
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d.SetBufferBaseAddress(0, 0)
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@@ -609,7 +592,7 @@ func (d *Device) LoraConfig(cnf LoraConfig) {
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func (d *Device) LoraTx(pkt []uint8, timeoutMs uint32) error {
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if d.loraConf.Freq == 0 {
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return errUndefinedLoraConf
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return lora.ErrUndefinedLoraConf
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}
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if d.rfswitch != nil {
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err := d.rfswitch.SetRfSwitchMode(RFSWITCH_TX_HP)
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@@ -625,7 +608,7 @@ func (d *Device) LoraTx(pkt []uint8, timeoutMs uint32) error {
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d.SetTxParams(d.loraConf.LoraTxPowerDBm, SX126X_PA_RAMP_200U)
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d.SetBufferBaseAddress(0, 0)
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d.WriteBuffer(pkt)
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d.SetModulationParams(d.loraConf.Sf, d.loraConf.Bw, d.loraConf.Cr, d.loraConf.Ldr)
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d.SetModulationParams(d.loraConf.Sf, bandwidth(d.loraConf.Bw), d.loraConf.Cr, d.loraConf.Ldr)
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d.SetPacketParam(d.loraConf.Preamble, d.loraConf.HeaderType, d.loraConf.Crc, uint8(len(pkt)), d.loraConf.Iq)
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d.SetDioIrqParams(irqVal, irqVal, SX126X_IRQ_NONE, SX126X_IRQ_NONE)
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d.SetSyncWord(d.loraConf.SyncWord)
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@@ -642,7 +625,7 @@ func (d *Device) LoraTx(pkt []uint8, timeoutMs uint32) error {
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func (d *Device) LoraRx(timeoutMs uint32) ([]uint8, error) {
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if d.loraConf.Freq == 0 {
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return nil, errUndefinedLoraConf
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return nil, lora.ErrUndefinedLoraConf
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}
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if d.rfswitch != nil {
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err := d.rfswitch.SetRfSwitchMode(RFSWITCH_RX)
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@@ -654,7 +637,7 @@ func (d *Device) LoraRx(timeoutMs uint32) ([]uint8, error) {
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irqVal := uint16(SX126X_IRQ_RX_DONE | SX126X_IRQ_TIMEOUT | SX126X_IRQ_CRC_ERR)
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d.SetStandby()
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d.SetBufferBaseAddress(0, 0)
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d.SetModulationParams(d.loraConf.Sf, d.loraConf.Bw, d.loraConf.Cr, d.loraConf.Ldr)
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d.SetModulationParams(d.loraConf.Sf, bandwidth(d.loraConf.Bw), d.loraConf.Cr, d.loraConf.Ldr)
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d.SetPacketParam(d.loraConf.Preamble, d.loraConf.HeaderType, d.loraConf.Crc, 0xFF, d.loraConf.Iq)
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d.SetDioIrqParams(irqVal, irqVal, SX126X_IRQ_NONE, SX126X_IRQ_NONE)
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d.SetRx(timeoutMsToRtcSteps(timeoutMs))
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@@ -699,3 +682,37 @@ func (d *Device) HandleInterrupt() {
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}
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}
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func bandwidth(bw uint8) uint8 {
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switch bw {
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case lora.Bandwidth_7_8:
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return SX126X_LORA_BW_7_8
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case lora.Bandwidth_10_4:
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return SX126X_LORA_BW_10_4
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case lora.Bandwidth_15_6:
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return SX126X_LORA_BW_15_6
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case lora.Bandwidth_20_8:
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return SX126X_LORA_BW_20_8
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case lora.Bandwidth_31_25:
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return SX126X_LORA_BW_31_25
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case lora.Bandwidth_41_7:
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return SX126X_LORA_BW_41_7
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case lora.Bandwidth_62_5:
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return SX126X_LORA_BW_62_5
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case lora.Bandwidth_125_0:
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return SX126X_LORA_BW_125_0
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case lora.Bandwidth_250_0:
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return SX126X_LORA_BW_250_0
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case lora.Bandwidth_500_0:
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return SX126X_LORA_BW_500_0
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default:
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return 0
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}
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}
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func syncword(sw int) uint16 {
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if sw == lora.SyncPublic {
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return SX126X_LORA_MAC_PUBLIC_SYNCWORD
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}
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return SX126X_LORA_MAC_PRIVATE_SYNCWORD
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}
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