PIC_Simulator_Simon/PIC_Simulator/PIC/RS232Verbindung.cs

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4.6 KiB
C#
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using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Windows.Forms;
namespace PIC_Simulator.PIC
{
public class RS232Verbindung
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{
private SerialPort ComPort;
private PICProgramm Programm;
private TextBox TextBox;
private Form1 Fenster;
private Timer timer;
public RS232Verbindung()
{
timer = new Timer();
timer.Tick += TimerOnTick;
timer.Interval = 500;
timer.Enabled = true;
}
private void TimerOnTick(object sender, EventArgs eventArgs)
{
if (ComPort == null) return;
if (!ComPort.IsOpen) return;
SendData();
RecieveData();
}
public List<string> GetSerialPorts()
{
string[] ArrayComPortsNames = null;
int index = -1;
string ComPortName = null;
List<string> result = new List<string>();
ArrayComPortsNames = SerialPort.GetPortNames();
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if (ArrayComPortsNames.Length == 0) return result;
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do
{
index += 1;
result.Add(ArrayComPortsNames[index]);
}
while (!((ArrayComPortsNames[index] == ComPortName) || (index == ArrayComPortsNames.GetUpperBound(0))));
return result.OrderBy(p => p).ToList();
}
public void Connect(string port, TextBox logbox, PICProgramm prog, Form1 f)
{
ComPort = new SerialPort();
ComPort.PortName = port;
ComPort.BaudRate = 4800;
ComPort.DataBits = 8;
ComPort.Parity = Parity.None;
ComPort.StopBits = StopBits.One;
try
{
ComPort.Open();
}
catch (Exception ex)
{
logbox.Text += ex + "\r\n";
ComPort = null;
return;
}
if (ComPort.IsOpen)
{
logbox.Text += "Connected to " + port + "\r\n";
Programm = prog;
TextBox = logbox;
Fenster = f;
return;
}
ComPort = null;
}
public void Disconnect()
{
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if (ComPort == null) return;
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ComPort.Close();
ComPort = null;
}
private void SendData()
{
string p_a = encodeByte(Programm.GetRegisterOhneBank(PICProgramm.ADDR_PORT_A));
string t_a = encodeByte(Programm.GetRegisterOhneBank(PICProgramm.ADDR_TRIS_A));
string p_b = encodeByte(Programm.GetRegisterOhneBank(PICProgramm.ADDR_PORT_B));
string t_b = encodeByte(Programm.GetRegisterOhneBank(PICProgramm.ADDR_TRIS_B));
string send = t_a + p_a + t_b + p_b;
Send_RS232(send);
}
private void Send_RS232(string txt)
{
if (txt != string.Empty)
{
ComPort.Write(txt + '\r');
TextBox.Text += "> " + txt + "\r\n";
}
}
private void RecieveData()
{
string x = ReadDataSegment();
if (x != string.Empty)
{
if (x == null)
{
TextBox.Text += ("< [ERR-R] NULL") + "\r\n";
}
else if (x.Length == 4)
{
TextBox.Text += ("< " + x) + "\r\n";
var v = decodeBytes(x);
if (v == null)
{
TextBox.Text += ("< [ERR-D] " + x) + "\r\n";
}
else
{
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for (uint i = 0; i < 8; i++)
{
// Nur 'i' bits übernehmen
if (Programm.GetRegisterOhneBank(PICProgramm.ADDR_TRIS_A, i))
Programm.Register[PICProgramm.ADDR_PORT_A] = PICProgramm.SetBit(Programm.Register[PICProgramm.ADDR_PORT_A], i, !PICProgramm.GetBit((byte)v.Item1, i));
if (Programm.GetRegisterOhneBank(PICProgramm.ADDR_TRIS_B, i))
Programm.Register[PICProgramm.ADDR_PORT_B] = PICProgramm.SetBit(Programm.Register[PICProgramm.ADDR_PORT_B], i, !PICProgramm.GetBit((byte)v.Item1, i));
}
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Fenster.OberflaecheAktualisieren();
}
}
else
{
TextBox.Text += ("< [ERR-L] " + x) + "\r\n";
}
x = ReadDataSegment();
}
}
private string encodeByte(uint b)
{
char c1 = (char)(0x30 + ((b & 0xF0) >> 4));
char c2 = (char)(0x30 + (b & 0x0F));
return "" + c1 + c2;
}
private Tuple<uint, uint> decodeBytes(string s)
{
int i0 = s[0] - 0x30;
int i1 = s[1] - 0x30;
int i2 = s[2] - 0x30;
int i3 = s[3] - 0x30;
if (i0 >= 0 && i1 >= 0 && i2 >= 0 && i3 >= 0 && i0 <= 0xF && i1 <= 0xF && i2 <= 0xF && i3 <= 0xF)
{
uint a = (((uint)i0 & 0x0F) << 4) | ((uint)i1 & 0x0F);
uint b = (((uint)i2 & 0x0F) << 4) | ((uint)i3 & 0x0F);
return Tuple.Create(a, b);
}
else
{
return null;
}
}
private string ReadDataSegment()
{
string s = "";
if (ComPort.BytesToRead >= 5)
{
char? c = null;
int idx = 5;
while (c != '\r' && idx > 0)
{
c = (char)ComPort.ReadByte();
s += c;
idx--;
}
if (idx <= 0 && c != '\r')
{
return null;
}
}
else
{
return string.Empty;
}
return s.Trim('\r');
}
}
}