TRX control through the modem using rigctl

trxcontrol.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"github.com/augustoroman/hexdump"
+	"github.com/creack/pty"
+	"os"
+	"strconv"
+	"time"
+)
+
+func trxControl() {
+	ptypath := "/tmp/my_virtual_serial"
+	master, slave, err := pty.Open()
+	if err != nil {
+		writeDebug(fmt.Sprintf("trxControl: error opening PTY: %v", err), 0)
+	}
+	defer master.Close()
+	defer slave.Close()
+
+	err = os.Remove(ptypath)
+	if err := os.Symlink(slave.Name(), ptypath); err != nil {
+		writeDebug(fmt.Sprintf("trxControl: error creating link: %v", err), 0)
+	}
+	writeDebug(fmt.Sprintf("trxControl: opening PTY: %s\n", ptypath), 0)
+	//  Receive from TRX
+	go func() {
+		for {
+			cmd, err := s.FromTRX.Dequeue(1024)
+			if err == nil {
+				master.Write(cmd)
+				writeDebug("From TRX response ("+strconv.Itoa(len(cmd))+"):\n"+hexdump.Dump(cmd), 1)
+			}
+			time.Sleep(30 * time.Millisecond)
+		}
+	}()
+
+	//scanner := bufio.NewScanner(master)
+	//for scanner.Scan() {
+	//t := scanner.Text()
+	rd := bufio.NewReader(master)
+	for {
+		time.Sleep(100 * time.Millisecond)
+		// looks like gpsd does not expect \n terminated lines so read what is there from the socket
+		master.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
+		buff := make([]byte, 1024)
+		n, err := rd.Read(buff)
+		t := buff[:n]
+		writeDebug("To TRX data ("+strconv.Itoa(len(t))+"):\n"+hexdump.Dump(t), 1)
+		// Send to TRX
+		err = s.ToTRX.Enqueue(t)
+		if err != nil {
+			writeDebug(fmt.Sprintf("trxControl: error enqueuing command: %v", err), 0)
+		}
+
+	}
+}