Add network device driver model, netdev

examples/net/socket/main.go

@@ -0,0 +1,99 @@
+// This example opens a TCP connection and sends some data using netdev sockets.
+//
+// You can open a server to accept connections from this program using:
+//
+// nc -lk 8080
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"machine"
+	"net"
+	"strconv"
+	"time"
+
+	"tinygo.org/x/drivers"
+)
+
+var (
+	ssid string
+	pass string
+	addr string = "10.0.0.100:8080"
+)
+
+var buf = &bytes.Buffer{}
+
+func main() {
+
+	waitSerial()
+
+	if err := netdev.NetConnect(); err != nil {
+		log.Fatal(err)
+	}
+
+	for {
+		sendBatch()
+		time.Sleep(500 * time.Millisecond)
+	}
+}
+
+func sendBatch() {
+
+	host, sport, _ := net.SplitHostPort(addr)
+	ip := net.ParseIP(host).To4()
+	port, _ := strconv.Atoi(sport)
+
+	// make TCP connection
+	message("---------------\r\nDialing TCP connection")
+	fd, _ := netdev.Socket(drivers.AF_INET, drivers.SOCK_STREAM, drivers.IPPROTO_TCP)
+	err := netdev.Connect(fd, "", ip, port)
+	for ; err != nil; err = netdev.Connect(fd, "", ip, port) {
+		message(err.Error())
+		time.Sleep(5 * time.Second)
+	}
+
+	n := 0
+	w := 0
+	start := time.Now()
+
+	// send data
+	message("Sending data")
+
+	for i := 0; i < 1000; i++ {
+		buf.Reset()
+		fmt.Fprint(buf,
+			"\r---------------------------- i == ", i, " ----------------------------"+
+				"\r---------------------------- i == ", i, " ----------------------------")
+		if w, err = netdev.Send(fd, buf.Bytes(), 0, time.Time{}); err != nil {
+			println("error:", err.Error(), "\r")
+			break
+		}
+		n += w
+	}
+
+	buf.Reset()
+	ms := time.Now().Sub(start).Milliseconds()
+	fmt.Fprint(buf, "\nWrote ", n, " bytes in ", ms, " ms\r\n")
+	message(buf.String())
+
+	if _, err := netdev.Send(fd, buf.Bytes(), 0, time.Time{}); err != nil {
+		println("error:", err.Error(), "\r")
+	}
+
+	println("Disconnecting TCP...")
+	netdev.Close(fd)
+}
+
+func message(msg string) {
+	println(msg, "\r")
+}
+
+// Wait for user to open serial console
+func waitSerial() {
+	for !machine.Serial.DTR() {
+		time.Sleep(100 * time.Millisecond)
+	}
+}