add dual example

examples/dual/dual.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"fmt"
+	"machine"
+	"time"
+
+	"github.com/soypat/lora/sx127x"
+)
+
+const (
+	pinCS0  = machine.GPIO27
+	pinCS1  = machine.GPIO28
+	pinRST0 = machine.GPIO29
+	pinRST1 = machine.GPIO29
+	pinMOSI = machine.GPIO3
+	pinMISO = machine.GPIO4
+	pinSCK  = machine.GPIO6
+)
+
+var (
+	dev0, dev1 *sx127x.DeviceLoRa
+)
+
+func main() {
+	time.Sleep(1500 * time.Millisecond)
+	println("program start")
+	var err error
+	setup()
+	defer println("program end")
+	var reg, fifo [256]byte
+	dev0.Reset()
+	if !dev0.IsConnected() {
+		panic("not connected")
+	}
+	dev0.Write8(1, 0)
+	time.Sleep(100 * time.Millisecond)
+	// dev0.SetOpMode(sx127x.OpSleep)
+	err = dev0.SetOpMode(sx127x.OpSleep)
+	if err != nil {
+		panic(err.Error())
+	}
+	time.Sleep(100 * time.Millisecond)
+	err = dev0.FullStatus(fifo[:], reg[:])
+	if err != nil {
+		panic(err.Error())
+	}
+	fmt.Printf("reg: %v\n\nfifo: %v\n", reg[:], fifo[:])
+}
+
+func setup() {
+	var bus = machine.SPI0
+	err := bus.Configure(machine.SPIConfig{
+		Frequency: 10_000,
+		SCK:       pinSCK,
+		SDO:       pinMOSI,
+		SDI:       pinMISO,
+	})
+	if err != nil {
+		panic(err.Error())
+	}
+	pinCS0.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	pinCS1.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	pinRST0.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	pinRST1.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	dev0 = sx127x.NewLoRa(bus, pinCS0.Set, pinRST0.Set)
+	dev1 = sx127x.NewLoRa(bus, pinCS1.Set, pinRST1.Set)
+}