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sago35
122 lines
2.5 KiB
Go
122 lines
2.5 KiB
Go
// This example opens a TCP connection using a device with RTL8720DN firmware
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// and sends some data, for the purpose of testing speed and connectivity.
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//
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// You can open a server to accept connections from this program using:
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//
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// nc -w 5 -lk 8080
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package main
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import (
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"machine"
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"bytes"
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"fmt"
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"time"
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"tinygo.org/x/drivers/net"
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"tinygo.org/x/drivers/rtl8720dn"
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)
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// You can override the setting with the init() in another source code.
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// func init() {
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// ssid = "your-ssid"
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// pass = "your-password"
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// serverIP = "192.168.1.119"
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// debug = true
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// }
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var (
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ssid string
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pass string
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serverIP = ""
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debug = false
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)
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var buf = &bytes.Buffer{}
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func main() {
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err := run()
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for err != nil {
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fmt.Printf("error: %s\r\n", err.Error())
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time.Sleep(5 * time.Second)
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}
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}
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func run() error {
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adaptor := rtl8720dn.New(machine.UART3, machine.PB24, machine.PC24, machine.RTL8720D_CHIP_PU)
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adaptor.Debug(debug)
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adaptor.Configure()
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err := adaptor.ConnectToAccessPoint(ssid, pass, 10*time.Second)
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if err != nil {
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return err
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}
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ip, subnet, gateway, err := adaptor.GetIP()
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if err != nil {
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return err
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}
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fmt.Printf("IP Address : %s\r\n", ip)
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fmt.Printf("Mask : %s\r\n", subnet)
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fmt.Printf("Gateway : %s\r\n", gateway)
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for {
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sendBatch()
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time.Sleep(500 * time.Millisecond)
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}
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println("Done.")
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return nil
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}
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func sendBatch() {
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// make TCP connection
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ip := net.ParseIP(serverIP)
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raddr := &net.TCPAddr{IP: ip, Port: 8080}
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laddr := &net.TCPAddr{Port: 8080}
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message("---------------\r\nDialing TCP connection")
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conn, err := net.DialTCP("tcp", laddr, raddr)
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for ; err != nil; conn, err = net.DialTCP("tcp", laddr, raddr) {
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message(err.Error())
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time.Sleep(5 * time.Second)
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}
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n := 0
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w := 0
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start := time.Now()
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// send data
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message("Sending data")
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for i := 0; i < 1000; i++ {
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buf.Reset()
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fmt.Fprint(buf,
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"\r---------------------------- i == ", i, " ----------------------------"+
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"\r---------------------------- i == ", i, " ----------------------------")
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if w, err = conn.Write(buf.Bytes()); err != nil {
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println("error:", err.Error(), "\r")
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continue
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}
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n += w
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}
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buf.Reset()
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ms := time.Now().Sub(start).Milliseconds()
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fmt.Fprint(buf, "\nWrote ", n, " bytes in ", ms, " ms\r\n")
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message(buf.String())
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if _, err := conn.Write(buf.Bytes()); err != nil {
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println("error:", err.Error(), "\r")
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}
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// Right now this code is never reached. Need a way to trigger it...
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println("Disconnecting TCP...")
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conn.Close()
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}
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func message(msg string) {
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println(msg, "\r")
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}
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