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T41Serial.cs
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T41Serial.cs
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using System.Net.Sockets;
using System.Text;
using System.IO.Ports;
using T41.Server.Debug;
using T41.Server.WSJTX;
namespace T41.Serial;
class T41Serial {
// serial port data
private bool connectionStarted = false;
private string selectedPort = "";
public string SelectedPort { get {return selectedPort; } }
private SerialPort? serialPort = null;
public bool Connected { get { return connectionStarted; } }
// local T41 data
public long Freq { get; private set; } = 7048000;
public string Split { get; private set; } = "OFF";
public string Mode { get; private set; } = "LSB";
private ServerWSJTX wsjtServer;
private ServerDebug debugServer;
public T41Serial() {
}
public void Init(ServerWSJTX wxjt, ServerDebug debug) {
wsjtServer = wxjt;
debugServer = debug;
}
public bool Connect(string port = "") {
bool result = false;
string requestedPort = "";
if(port == "") {
Console.Write("Enter COM port to connect to: ");
requestedPort = Console.ReadLine();
} else {
requestedPort = port;
}
try {
// can't reconnect with this
// *** TODO: work out a way to reconnect if connection is lost ***
if (!connectionStarted && requestedPort != selectedPort) {
// try to connect to requestedPort
serialPort = new SerialPort();
serialPort.PortName = requestedPort;
// we have a USB serial port communicating at native USB speeds
// these aren't used
serialPort.BaudRate = 19200;
serialPort.Parity = Parity.None;
serialPort.DataBits = 8;
serialPort.DtrEnable = false;
serialPort.RtsEnable = false;
try {
serialPort.Open();
}
//catch (Exception ex) {
catch (Exception) {
connectionStarted = false;
selectedPort = "";
return result;
}
Thread.Sleep(30);
if (serialPort.IsOpen) {
connectionStarted = true;
selectedPort = requestedPort;
result = true;
serialPort.DataReceived += new SerialDataReceivedEventHandler(T41DataReceivedHandler);
} else {
connectionStarted = false;
selectedPort = "";
}
}
return result;
}
//catch (Exception ex) {
catch (Exception) {
connectionStarted = false;
selectedPort = "";
return result;
}
}
public void SetTime() {
// *** TODO: the T41 time will lag from this by the serial processing time, add a second for now ***
SendCmd("TM" + (DateTimeOffset.Now.ToUnixTimeSeconds() - 7 * 60 * 60 + 1).ToString("D11"));
}
public void SendCmd(string cmd) {
if (serialPort != null && serialPort.IsOpen) {
Console.WriteLine($" Sending " + cmd + " to T41");
serialPort.Write(cmd + ";");
}
}
// Serial port DataReceived events are handled in a secondary thread
// (https://learn.microsoft.com/en-us/dotnet/api/system.io.ports.serialport.datareceived?view=net-8.0)
// this says to "post change requests back using Invoke, which will do the work on the proper thread"
// I couldn't get Invoke or events to work as it seems with winui 3 these remain on the current thread.
// Using the main UI thread dispatcher for changes to bound properties does work.
// (amazing how difficult it is to find information on this online)
public void T41DataReceivedHandler(object sender, SerialDataReceivedEventArgs e) {
SerialPort sp = (SerialPort)sender;
int len = sp.BytesToRead;
if(len > 0) {
byte[] byt = new byte[len];
sp.Read(byt, 0, len);
if(len < 512) {
int first=0, end=0; //next=0, last=0;
byte[] cmd = new byte[len];
// we might have more than one command
byt.CopyTo(cmd, 0);
do {
byte[] msg = new byte[len];
//last = Array.LastIndexOf(cmd, (byte)'<');
first = Array.IndexOf(cmd, (byte)'<');
if(first == -1) {
// assume we'll only get one non-debug msg per buffer
first = 0;
end = len - 1;
} else if(first != 0) {
end = first - 1;
first = 0;
} else {
// we have the start of a debug message, find its end
end = Array.IndexOf(cmd, (byte)'>');
if(end == -1) {
// we have an incomplete message, set end to the end of the buffer
end = len - 1;
}
}
// execute command
switch((char)cmd[0]) {
case '<':
if((char)cmd[end] == '>') {
int id;
if(FetchInt(cmd, 1, 2, out id)) {
debugServer.ProcessDebugMessage(Encoding.Default.GetString(cmd, 3, end + 1 - 4), id);
}
}
break;
case 'F':
if((char)cmd[1] == 'A' && (char)cmd[13] == ';') {
long f;
if(FetchFreq(cmd, out f)) {
Freq = f;
Console.WriteLine($" Received FA" + f.ToString() + "; " + "from T41");
wsjtServer.ProcessReply("CmdGetFreq");
}
}
break;
case 'M':
if((char)cmd[1] == 'D' && (char)cmd[3] == ';') {
int val;
if(FetchInt(cmd, 2, out val)) {
switch(val) {
case 0: // USB
Mode = "USB";
break;
case 1: // LSB
Mode = "LSB";
break;
default:
Mode = "USB";
break;
}
Console.WriteLine($" Received MD" + val.ToString() + "; " + "from T41");
wsjtServer.ProcessReply("CmdSendMode");
}
}
break;
case 'S':
if((char)cmd[1] == 'P' && (char)cmd[3] == ';') {
// Kenwood TS-2000 manual mentions but doesn't document the split mode command (SP)
// The Kenwood TS-890S manual does but is unclear
// I'll use a returned value of 1=On and 0=Off
int val;
if(FetchInt(cmd, 2, out val)) {
switch(val) {
case 0: // off
Split = "OFF";
break;
case 1: // on
Split = "ON";
break;
default:
Split = "OFF";
break;
}
Console.WriteLine($" Received SP" + val.ToString() + "; " + "from T41");
wsjtServer.ProcessReply("CmdSendSplit");
}
}
break;
default:
break;
}
if(end + 1 < len) {
Array.Copy(cmd, end + 1, cmd, 0, len - end - 1);
Array.Fill(cmd, (byte)0, len - end - 1, end);
}
len = len - end - 1;
} while (len > 0);
}
}
}
public static bool FetchFreq(byte[] byt, out long result) {
return long.TryParse(Encoding.Default.GetString(byt, 2, 11), out result);
}
public static bool FetchLong(byte[] byt, int start, int len, out long result) {
return long.TryParse(Encoding.Default.GetString(byt, start, len), out result);
}
public static bool FetchInt(byte[] byt, int start, int len, out int result) {
return int.TryParse(Encoding.Default.GetString(byt, start, len), out result);
}
public static bool FetchInt(byte[] byt, int start, out int result) {
return int.TryParse(Encoding.Default.GetString(byt, start, 1), out result);
}
public static bool FetchFreq(string cmd, out long result) {
return long.TryParse(cmd.Substring(2, 11), out result);
}
public static bool FetchLong(string cmd, int start, int len, out long result) {
return long.TryParse(cmd.Substring(start, len), out result);
}
public static bool FetchInt(string cmd, int start, int len, out int result) {
return int.TryParse(cmd.Substring(start, len), out result);
}
public static bool FetchInt(string cmd, int start, out int result) {
return int.TryParse(cmd.Substring(start, 1), out result);
}
}