Add examples/rtl8720dn/udpstation

examples/rtl8720dn/udpstation/main.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"fmt"
+	"strconv"
+	"time"
+
+	"tinygo.org/x/drivers/net"
+	"tinygo.org/x/drivers/net/http"
+)
+
+// IP address of the server aka "hub". Replace with your own info.
+// You can override the setting with the init() in another source code.
+// func init() {
+//    ssid = "your-ssid"
+//    password = "your-password"
+//    hubIP = "192.168.1.118"
+//    debug = true
+// }
+
+var (
+	ssid     string
+	password string
+	hubIP    = ""
+	debug    = false
+)
+
+var buf [0x400]byte
+
+func main() {
+	err := run()
+	for err != nil {
+		fmt.Printf("error: %s\r\n", err.Error())
+		time.Sleep(5 * time.Second)
+	}
+}
+
+func run() error {
+	rtl, err := setupRTL8720DN()
+	if err != nil {
+		return err
+	}
+	net.UseDriver(rtl)
+	http.SetBuf(buf[:])
+
+	err = rtl.ConnectToAP(ssid, password)
+	if err != nil {
+		return err
+	}
+
+	ip, subnet, gateway, err := rtl.GetIP()
+	if err != nil {
+		return err
+	}
+	fmt.Printf("IP Address : %s\r\n", ip)
+	fmt.Printf("Mask       : %s\r\n", subnet)
+	fmt.Printf("Gateway    : %s\r\n", gateway)
+
+	// now make UDP connection
+	hip := net.ParseIP(hubIP)
+	raddr := &net.UDPAddr{IP: hip, Port: 2222}
+	laddr := &net.UDPAddr{Port: 2222}
+
+	println("Dialing UDP connection...")
+	conn, err := net.DialUDP("udp", laddr, raddr)
+	if err != nil {
+		return err
+	}
+
+	for {
+		// send data
+		println("Sending data...")
+		for i := 0; i < 25; i++ {
+			conn.Write([]byte("hello " + strconv.Itoa(i) + "\r\n"))
+		}
+		time.Sleep(1000 * time.Millisecond)
+	}
+
+	// Right now this code is never reached. Need a way to trigger it...
+	println("Disconnecting UDP...")
+	conn.Close()
+	println("Done.")
+
+	return nil
+}
+
+func message(msg string) {
+	println(msg, "\r")
+}

examples/rtl8720dn/udpstation/wioterminal.go

@@ -0,0 +1,71 @@
+// +build wioterminal
+
+package main
+
+import (
+	"device/sam"
+	"machine"
+	"runtime/interrupt"
+	"time"
+
+	"tinygo.org/x/drivers/rtl8720dn"
+)
+
+var (
+	uart UARTx
+)
+
+func handleInterrupt(interrupt.Interrupt) {
+	// should reset IRQ
+	uart.Receive(byte((uart.Bus.DATA.Get() & 0xFF)))
+	uart.Bus.INTFLAG.SetBits(sam.SERCOM_USART_INT_INTFLAG_RXC)
+}
+
+func setupRTL8720DN() (*rtl8720dn.RTL8720DN, error) {
+	machine.RTL8720D_CHIP_PU.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.RTL8720D_CHIP_PU.Low()
+	time.Sleep(100 * time.Millisecond)
+	machine.RTL8720D_CHIP_PU.High()
+	time.Sleep(1000 * time.Millisecond)
+	waitSerial()
+
+	uart = UARTx{
+		UART: &machine.UART{
+			Buffer: machine.NewRingBuffer(),
+			Bus:    sam.SERCOM0_USART_INT,
+			SERCOM: 0,
+		},
+	}
+
+	uart.Interrupt = interrupt.New(sam.IRQ_SERCOM0_2, handleInterrupt)
+	uart.Configure(machine.UARTConfig{TX: machine.PB24, RX: machine.PC24, BaudRate: 614400})
+
+	rtl := rtl8720dn.New(uart)
+	rtl.Debug(debug)
+
+	_, err := rtl.Rpc_tcpip_adapter_init()
+	if err != nil {
+		return nil, err
+	}
+
+	return rtl, nil
+}
+
+// Wait for user to open serial console
+func waitSerial() {
+	for !machine.Serial.DTR() {
+		time.Sleep(100 * time.Millisecond)
+	}
+}
+
+type UARTx struct {
+	*machine.UART
+}
+
+func (u UARTx) Read(p []byte) (n int, err error) {
+	if u.Buffered() == 0 {
+		time.Sleep(1 * time.Millisecond)
+		return 0, nil
+	}
+	return u.UART.Read(p)
+}