examples: lora atcmd minimal rx and tx

Signed-off-by: deadprogram <ron@hybridgroup.com>

examples/lora/atcmd/commands.go

@@ -11,7 +11,7 @@ func quicktest() {
 
 // Check firmware version.
 func version() {
-	writeCommandOutput("VER", currentVersion()+" "+firmwareVersion())
+	writeCommandOutput("VER", currentVersion()+" ("+firmwareVersion()+")")
 }
 
 // Use to check the ID of the LoRaWAN module, or change the ID.
@@ -329,12 +329,38 @@ func log(setting string) error {
 	return nil
 }
 
+func recv(setting string) error {
+	cmd := "RECV"
+
+	data, err := lorarx()
+	if err != nil {
+		writeCommandOutput(cmd, "ERROR "+err.Error())
+		return err
+	}
+	writeCommandOutput(cmd, string(data))
+
+	return nil
+}
+
+func recvhex(setting string) error {
+	cmd := "RECVHEX"
+
+	data, err := lorarx()
+	if err != nil {
+		writeCommandOutput(cmd, "ERROR "+err.Error())
+		return err
+	}
+	writeCommandOutput(cmd, string(data))
+
+	return nil
+}
+
 func crlf() {
 	uart.Write([]byte("\r\n"))
 }
 
 func writeCommandOutput(cmd, data string) {
-	uart.Write([]byte("+"+cmd+": "))
+	uart.Write([]byte("+" + cmd + ": "))
 	uart.Write([]byte(data))
 	crlf()
 }

examples/lora/atcmd/parser.go

@@ -99,6 +99,10 @@ func parseCommand(cmd, args string) error {
 		test(args)
 	case "LOG":
 		log(args)
+	case "RECV":
+		recv(args)
+	case "RECVHEX":
+		recvhex(args)
 	default:
 		return errInvalidCommand
 	}

examples/lora/atcmd/radio.go

@@ -6,6 +6,7 @@ import (
 
 var (
 	errRadioNotFound = errors.New("radio not found")
+	errRxTimeout     = errors.New("radio RX timeout")
 )
 
 type LoraRadio interface {

examples/lora/atcmd/sim.go

@@ -29,5 +29,9 @@ func (sr *SimLoraRadio) SetLoraCrc(enable bool) {}
 func (sr *SimLoraRadio) SetLoraSpreadingFactor(sf uint8) {}
 
 func firmwareVersion() string {
-	return "Simulator "+currentVersion()
+	return "Simulator " + currentVersion()
+}
+
+func lorarx() ([]byte, error) {
+	return nil, nil
 }

examples/lora/atcmd/sx126x.go

@@ -63,3 +63,7 @@ func radioIntHandler(intr interrupt.Interrupt) {
 func firmwareVersion() string {
 	return "sx126x"
 }
+
+func lorarx() ([]byte, error) {
+	return loraRadio.LoraRx(LORA_DEFAULT_RXTIMEOUT_MS)
+}

examples/lora/atcmd/sx127x.go

@@ -11,7 +11,11 @@ import (
 	"tinygo.org/x/drivers/sx127x"
 )
 
-const FREQ = 868100000
+const (
+	FREQ                      = 868100000
+	LORA_DEFAULT_RXTIMEOUT_MS = 1000
+	LORA_DEFAULT_TXTIMEOUT_MS = 5000
+)
 
 var (
 	// We assume LoRa Featherwing module is connected to PyBadge:
@@ -67,12 +71,15 @@ func setupLora() (LoraRadio, error) {
 	return loraRadio, nil
 }
 
-
 func dioIrqHandler(machine.Pin) {
 	loraRadio.HandleInterrupt()
 }
 
 func firmwareVersion() string {
 	v := loraRadio.GetVersion()
-	return "sx127x v"+strconv.Itoa(int(v))
+	return "sx127x v" + strconv.Itoa(int(v))
+}
+
+func lorarx() ([]byte, error) {
+	return loraRadio.LoraRx(LORA_DEFAULT_RXTIMEOUT_MS)
 }