first commit

examples/transmitter/transmitter.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"machine"
+	"time"
+
+	"github.com/soypat/lora"
+	"github.com/soypat/lora/sx127x"
+)
+
+var (
+	SX127X_SPI = machine.SPI0
+)
+
+const (
+	SX127X_PIN_RST = machine.GP16
+	// SPI definition for SX127x
+
+	SX127X_PIN_SCK = machine.GP2
+	SX127X_PIN_TX  = machine.GP3
+	SX127X_PIN_RX  = machine.GP4
+	SX127X_PIN_CS  = machine.GP5
+)
+
+func main() {
+	time.Sleep(500 * time.Millisecond)
+	defer println("program end")
+	SX127X_PIN_RST.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	SX127X_PIN_CS.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	err := SX127X_SPI.Configure(machine.SPIConfig{
+		Frequency: 100000,
+		SCK:       SX127X_PIN_SCK,
+		SDO:       SX127X_PIN_TX,
+		SDI:       SX127X_PIN_RX,
+	})
+	if err != nil {
+		panic(err.Error())
+	}
+	dev := sx127x.NewLoRa(SX127X_SPI, SX127X_PIN_CS.Set, SX127X_PIN_RST.Set)
+	err = dev.Configure(lora.Config{
+		Bandwidth:      lora.BW125k,
+		Frequency:      lora.Freq433_0M,
+		CodingRate:     lora.CR4_5,
+		SpreadFactor:   lora.SF7,
+		HeaderType:     lora.HeaderExplicit,
+		TxPower:        0,
+		CRC:            true,
+		PreambleLength: 12,
+	})
+	if err != nil {
+		panic(err.Error())
+	}
+	println("config success")
+}