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https://github.com/soypat/lora.git
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soypat
71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
package main
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import (
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"fmt"
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"machine"
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"time"
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"github.com/soypat/lora"
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"github.com/soypat/lora/sx127x"
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)
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var (
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SX127X_SPI = machine.SPI0
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)
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const (
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SX127X_PIN_RST = machine.GP16
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// SPI definition for SX127x
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SX127X_PIN_SCK = machine.GP2
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SX127X_PIN_TX = machine.GP3
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SX127X_PIN_RX = machine.GP4
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SX127X_PIN_CS = machine.GP5
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)
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func main() {
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time.Sleep(500 * time.Millisecond)
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defer println("program end")
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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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err := SX127X_SPI.Configure(machine.SPIConfig{
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Frequency: 100000,
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SCK: SX127X_PIN_SCK,
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SDO: SX127X_PIN_TX,
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SDI: SX127X_PIN_RX,
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})
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if err != nil {
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panic(err.Error())
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}
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dev := sx127x.NewLoRa(SX127X_SPI, SX127X_PIN_CS.Set, SX127X_PIN_RST.Set)
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err = dev.Configure(lora.Config{
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Bandwidth: lora.BW125k,
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Frequency: lora.Freq433_0M,
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CodingRate: lora.CR4_5,
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SpreadFactor: lora.SF7,
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HeaderType: lora.HeaderExplicit,
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TxPower: 0,
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CRC: true,
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PreambleLength: 12,
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})
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if err != nil {
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panic(err.Error())
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}
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println("config success")
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for {
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rssiRead, err := dev.EstimateReadFromRSSIPeriod(time.Second)
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if err != nil {
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panic(err.Error())
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}
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println("rssiRead:", rssiRead.String())
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}
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tstart := time.Now()
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var rng [4]byte
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err = dev.RandomRead(rng[:], 0)
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if err != nil {
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panic(err.Error())
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}
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fmt.Printf("random bytes: %b\nelapsed:%s\n", rng, time.Since(tstart).String())
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}
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