mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-08-17 21:23:58 +00:00
Olivier Fauchon
100 lines
2.8 KiB
Go
100 lines
2.8 KiB
Go
package main
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// This example code demonstrates Lora RX/TX.
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// It has been tested with bluepill and SX1276 (RFM95W board)
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import (
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"machine"
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"time"
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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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loraRadio *sx127x.Device
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// We assume the module is connected this way:
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SX127X_PIN_RST = machine.PB9
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SX127X_PIN_CS = machine.PB8
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SX127X_PIN_DIO0 = machine.PA0
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SX127X_SPI = machine.SPI0
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txmsg = []byte("Hello TinyGO")
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)
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func main() {
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println("\n# TinyGo Lora continuous Wave/Preamble test")
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println("# -----------------------------------------")
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println("main: configuring LED/SPI/DIO/IRQ")
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machine.LED.Configure(machine.PinConfig{Mode: machine.PinOutput})
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SX127X_PIN_RST.Configure(machine.PinConfig{Mode: machine.PinOutput})
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SX127X_PIN_CS.Configure(machine.PinConfig{Mode: machine.PinOutput})
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SX127X_PIN_DIO0.Configure(machine.PinConfig{Mode: machine.PinInputPulldown})
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SX127X_SPI.Configure(machine.SPIConfig{Frequency: 500000, Mode: 0})
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err := SX127X_PIN_DIO0.SetInterrupt(machine.PinRising, func(machine.Pin) { // Int handler
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loraRadio.HandleInterrupt()
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})
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if err != nil {
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panic("main: Can't configure DIO int handler")
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}
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println("main: create and start SX127x driver")
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loraRadio = sx127x.New(SX127X_SPI, SX127X_PIN_CS, SX127X_PIN_RST)
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loraRadio.Reset()
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state := loraRadio.DetectDevice()
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if !state {
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panic("main: sx127x NOT FOUND !!!")
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} else {
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println("main: sx127x found")
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}
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println("main: Configure lora modulation")
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loraRadio.SetOpModeLora()
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loraRadio.SetOpMode(sx127x.SX127X_OPMODE_SLEEP)
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loraRadio.SetTxPower(11, true)
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loraRadio.SetLoraFrequency(FREQ)
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loraRadio.SetLoraBandwidth(sx127x.SX127X_LORA_BW_125_0)
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loraRadio.SetLoraSpreadingFactor(sx127x.SX127X_LORA_SF11)
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loraRadio.SetLoraCodingRate(sx127x.SX127X_LORA_CR_4_5)
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loraRadio.SetLoraIqMode(sx127x.SX127X_LORA_IQ_STANDARD)
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loraRadio.SetLoraCrc(true)
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loraRadio.SetLoraHeaderMode(sx127x.SX127X_LORA_HEADER_EXPLICIT)
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loraRadio.SetLowDataRateOptim(sx127x.SX127X_LOW_DATARATE_OPTIM_OFF)
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// Get uint32 from RSSI
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rand32 := loraRadio.RandomU32()
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println("main: Get random 32bit from RSSI:", rand32)
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var count uint
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for {
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tStart := time.Now()
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machine.LED.Set(!machine.LED.Get())
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println("main: Receiving Lora for 10 seconds")
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for int(time.Now().Sub(tStart).Seconds()) < 60 {
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buf, err := loraRadio.LoraRx(LORA_DEFAULT_RXTIMEOUT_MS)
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if err != nil {
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println("RX Error: ", err)
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} else if buf != nil {
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println("Packet Received: len=", len(buf), string(buf))
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}
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}
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println("main: End Lora RX")
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println("LORA TX size=", len(txmsg), " -> ", string(txmsg))
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err := loraRadio.LoraTx(txmsg, LORA_DEFAULT_TXTIMEOUT_MS)
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if err != nil {
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println("TX Error:", err)
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}
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count++
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}
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}
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