cleanup sx1262 example

lilygo-t3s3-sx126x/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"errors"
 	"machine"
 	"sync/atomic"
 	"time"
@@ -57,7 +58,7 @@ func main() {
 	var timeout atomic.Bool
 	timeout.Store(true)
 
-	dio1.Configure(machine.PinConfig{Mode: machine.PinInputPulldown})
+	dio1.Configure(machine.PinConfig{Mode: machine.PinInput})
 	dio1.SetInterrupt(machine.PinRising, func(machine.Pin) {
 		irqStatus := radio.GetIrqStatus()
 		println("irq status:", irqStatus)
@@ -108,7 +109,7 @@ func main() {
 		// 	println("waiting 1s before transmitting...")
 		// 	time.Sleep(1000 * time.Millisecond)
 		// 	led.Set(true)
-		// 	err := Tx(radio, loraConfig, []byte("hello world"))
+		// 	err := Tx(radio, loraConfig, []byte("hello world "+time.Now().Format("15:04:05")))
 		// 	if err != nil {
 		// 		println("failed to enter transmit:", err)
 		// 	}
@@ -118,30 +119,29 @@ func main() {
 		if rxDone.Load() {
 			rxDone.Store(false)
 			if !timeout.Load() {
-				println("receive completed without timeout, reading buffer...")
 				rxLength, rxPointer := radio.GetRxBufferStatus()
-				println("rx length:", rxLength, "rx pointer:", rxPointer)
 				rxData := radio.ReadBuffer(rxPointer, rxLength)
-				println("rx data:", string(rxData))
+				println("received data:", string(rxData))
 				led.Set(false)
 			} else {
 				println("receive timed out")
+				println("starting Rx again...")
 			}
 			Rx(radio, loraConfig)
-			println("receive started")
 		}
 	}
 }
 
 func SetupLora(radio *sx126x.Device, config lora.Config) {
 	// Switch to standby prior to configuration changes
-
+	time.Sleep(1 * time.Second)
-	chipMode, _ := radio.GetStatus()
-	if chipMode != sx126x.CHIP_MODE_STBY_RC {
 	radio.SetStandby(sx126x.STANDBY_RC)
-	}
+	deviceError := radio.GetDeviceErrors()
+	if deviceError&uint16(32) > 0 {
 		radio.ClearDeviceErrors()
-	// Clear errors, disable radio interrupts for the moment
+	}
+	radio.SetDIO3AsTCXOCtrl(sx126x.TCXO_VOLTAGE_1_6V, 5000)
+	radio.SetDIO2AsRfSwitchCtrl(true)
 	radio.SetPacketType(sx126x.PACKET_TYPE_LORA)
 	radio.SetRfFrequency(config.Freq)
 	radio.SetModulationParamsLoRa(spreadingFactor(config.Sf), bandwidth(config.Bw), codingRate(config.Cr), config.Ldr)
@@ -150,11 +150,8 @@ func SetupLora(radio *sx126x.Device, config lora.Config) {
 	var syncWord [2]uint8
 	syncWord[0] = uint8(config.SyncWord >> 8)
 	syncWord[1] = uint8(config.SyncWord & 0x00FF)
-
 	radio.WriteRegister(sx126x.REG_LORA_SYNC_WORD_MSB, syncWord[:])
 	radio.SetRxTxFallbackMode(sx126x.FALLBACK_MODE_STDBY_RC)
-	radio.SetDIO2AsRfSwitchCtrl(true)
-	radio.SetDIO3AsTCXOCtrl(sx126x.TCXO_VOLTAGE_1_6V, 5000)
 }
 
 func Tx(radio *sx126x.Device, loraConfig lora.Config, data []byte) error {
@@ -162,7 +159,7 @@ func Tx(radio *sx126x.Device, loraConfig lora.Config, data []byte) error {
 	radio.SetBufferBaseAddress(0, 0)
 	radio.SetDioIrqParams(sx126x.IRQ_TX_DONE_MASK|sx126x.IRQ_TIMEOUT_MASK, sx126x.IRQ_TX_DONE_MASK|sx126x.IRQ_TIMEOUT_MASK, 0x00, 0x00)
 	if len(data) > 255 {
-		return nil
+		return errors.New("data length exceeds maximum of 255 bytes")
 	}
 	radio.SetPacketParamsLoRa(loraConfig.Preamble, loraConfig.HeaderType, uint8(len(data)&0xFF), loraConfig.Crc, loraConfig.Iq)
 	radio.WriteBuffer(0, data)
@@ -173,11 +170,13 @@ func Tx(radio *sx126x.Device, loraConfig lora.Config, data []byte) error {
 
 func Rx(radio *sx126x.Device, loraConfig lora.Config) {
 	radio.SetStandby(sx126x.STANDBY_RC)
+	radio.ClearDeviceErrors()
 	radio.ClearIrqStatus(sx126x.IRQ_ALL_MASK)
 	radio.SetBufferBaseAddress(0, 0)
 	radio.SetRfFrequency(loraConfig.Freq)
 	radio.SetPacketParamsLoRa(loraConfig.Preamble, loraConfig.HeaderType, 0xFF, loraConfig.Crc, loraConfig.Iq)
 	radio.SetDioIrqParams(sx126x.IRQ_RX_DONE_MASK|sx126x.IRQ_TIMEOUT_MASK, sx126x.IRQ_RX_DONE_MASK|sx126x.IRQ_TIMEOUT_MASK, 0x00, 0x00)
+	radio.SetStandby(sx126x.STANDBY_XOSC)
 	radio.SetRx(1000)
 }
 
@@ -245,8 +244,3 @@ func bandwidth(bw uint8) uint8 {
 		return 0
 	}
 }
-
-func timeoutMsToRtcSteps(timeoutMs uint32) uint32 {
-	r := uint32(timeoutMs * (64000 / 1000))
-	return r
-}