mirror of
https://github.com/tinygo-org/drivers.git
synced 2026-08-16 04:43:25 +00:00
Olivier Fauchon
120 lines
3.2 KiB
Go
120 lines
3.2 KiB
Go
package main
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// This example code demonstrates Lora RX/TX With SX127x driver
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// You need to connect SPI, DIO0 and DIO1 to use.
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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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LORA_DEFAULT_RXTIMEOUT_MS = 1000
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LORA_DEFAULT_TXTIMEOUT_MS = 5000
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DIO_PIN_CHANGE = machine.PinRising
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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_PIN_DIO1 = machine.PA1
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SX127X_SPI = machine.SPI0
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txmsg = []byte("Hello TinyGO")
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// Prepare for Lora Operation
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loraConf = sx127x.LoraConfig{
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Freq: 868100000,
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Bw: sx127x.SX127X_LORA_BW_125_0,
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Sf: sx127x.SX127X_LORA_SF9,
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Cr: sx127x.SX127X_LORA_CR_4_7,
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HeaderType: sx127x.SX127X_LORA_HEADER_EXPLICIT,
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Preamble: 12,
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Iq: sx127x.SX127X_LORA_IQ_STANDARD,
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Crc: sx127x.SX127X_LORA_CRC_ON,
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SyncWord: sx127x.SX127X_LORA_MAC_PUBLIC_SYNCWORD,
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LoraTxPowerDBm: 20,
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}
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)
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func main() {
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println("\n# TinyGo Driver SX127X RX/TX example")
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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.PinInputPullup})
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SX127X_PIN_DIO1.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
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SX127X_SPI.Configure(machine.SPIConfig{Frequency: 500000, Mode: 0})
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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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// Setup DIO0 interrupt Handling
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err := SX127X_PIN_DIO0.SetInterrupt(DIO_PIN_CHANGE, func(machine.Pin) {
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if SX127X_PIN_DIO0.Get() {
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loraRadio.HandleInterrupt()
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}
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})
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if 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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err = SX127X_PIN_DIO1.SetInterrupt(DIO_PIN_CHANGE, func(machine.Pin) {
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if SX127X_PIN_DIO1.Get() {
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loraRadio.HandleInterrupt()
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}
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})
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if err != nil {
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println("could not configure DIO1 pin interrupt:", err.Error())
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}
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println("main: Configure lora modulation")
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loraRadio.LoraConfig(loraConf)
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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()) < 10 {
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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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