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deadprogram
86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
//go:build featherwing
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package main
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import (
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"strconv"
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"machine"
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"tinygo.org/x/drivers/lora"
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"tinygo.org/x/drivers/sx127x"
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)
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const (
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FREQ = 868100000
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LORA_DEFAULT_RXTIMEOUT_MS = 1000
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LORA_DEFAULT_TXTIMEOUT_MS = 5000
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)
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var (
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// We assume LoRa Featherwing module is connected to PyBadge:
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rstPin = machine.D11
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csPin = machine.D10
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dio0Pin = machine.D6
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dio1Pin = machine.D9
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spi = machine.SPI0
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loraRadio *sx127x.Device
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)
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// do sx127x setup here
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func setupLora() (LoraRadio, error) {
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rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
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csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
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dio0Pin.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
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dio1Pin.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
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spi.Configure(machine.SPIConfig{Frequency: 500000, Mode: 0})
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loraRadio = sx127x.New(spi, csPin, rstPin)
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loraRadio.Reset()
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if state := loraRadio.DetectDevice(); !state {
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return nil, errRadioNotFound
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}
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// Setup DIO0 interrupt Handling
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if err := dio0Pin.SetInterrupt(machine.PinRising, dioIrqHandler); err != nil {
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println("could not configure DIO0 pin interrupt:", err.Error())
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}
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// Setup DIO1 interrupt Handling
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if err := dio1Pin.SetInterrupt(machine.PinRising, dioIrqHandler); err != nil {
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println("could not configure DIO1 pin interrupt:", err.Error())
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}
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// Prepare for Lora Operation
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loraConf := lora.Config{
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Freq: FREQ,
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Bw: lora.Bandwidth_500_0,
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Sf: lora.SpreadingFactor9,
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Cr: lora.CodingRate4_7,
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HeaderType: lora.HeaderExplicit,
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Preamble: 12,
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Iq: lora.IQStandard,
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Crc: lora.CRCOn,
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SyncWord: lora.SyncPrivate,
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LoraTxPowerDBm: 20,
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}
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loraRadio.LoraConfig(loraConf)
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return loraRadio, nil
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}
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func dioIrqHandler(machine.Pin) {
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loraRadio.HandleInterrupt()
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}
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func firmwareVersion() string {
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v := loraRadio.GetVersion()
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return "sx127x v" + strconv.Itoa(int(v))
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}
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func lorarx() ([]byte, error) {
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return loraRadio.Rx(LORA_DEFAULT_RXTIMEOUT_MS)
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}
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