Hjælp ønskes til at se data fra AVR 128

Hej alle

Er der nogle der kan hjælpe mig at få vist nogle data fra en mikroprocessor AVR 128.

Jeg ønsker at få vist nogle bestemte data i textBox2 (RPM Data).

Koden herunder viser alle data (get 27 bytes of MS runtime) i textbox 1 som hentes men jeg ønsker kun at se et nogle bestemte bytes i textbox2.

Hvordan læser jeg nogle bestemte bytes i Buffer og får dem vist i textbox2

Her ses alle data som bliver uploaded og vist i textBox1
http://www.au2stereo.dk/audi/test_vems.jpg

Tak Peter



using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Threading;
using System.Windows.Forms;

namespace TestMegasquirt
{
public partial class Form1 : Form
{
byte[] buffer = new byte[1000];

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
ClosePort();
}

void ReadPort()
{
}
void OpenPort()
{
SerialPort1.PortName = "COM1";
SerialPort1.Open();
SerialPort1.ReadTimeout = 400;
}
void ClosePort()
{
if (SerialPort1.IsOpen) {
SerialPort1.Close();
}
}
private void bnRead_Click(object sender, EventArgs e)
{
if (SerialPort1.IsOpen) {
timer1.Enabled = true;
}
else {
OpenPort();
timer1.Enabled = true;
}
}

private void bnStop_Click(object sender, EventArgs e)
{
timer1.Enabled = false;
ClosePort();
}

char[] sbuf = new char[5];
int bytes = 0;
int bytesRead = 0;
void readConst()
{
// get 128 bytes of standard MS constants
bytes = 128;
bytesRead = 0;
sbuf[0] = 'V';
SerialPort1.DiscardInBuffer();
SerialPort1.Write(sbuf, 0, 1);
Thread.Sleep(150);
try {
bytesRead = SerialPort1.Read(buffer, 0, bytes);
}
catch (Exception) {
}
}
void readRuntime()
{
// get 27 bytes of MS runtime
bytes = 27;
bytesRead = 0;
sbuf[0] = 'A';
SerialPort1.DiscardInBuffer();
SerialPort1.Write(sbuf, 0, 1);
Thread.Sleep(150);
try {
bytesRead = SerialPort1.Read(buffer, 0, bytes);
}
catch (Exception) {
}
}

private void timer1_Tick(object sender, EventArgs e)
{
readRuntime();
//readConst();
Display();
}

private void Display()
{
textBox1.Clear();
string s = "";
for (int i = 0; i < bytesRead; i++) {
s += buffer.ToString();
s += "\\r\\n";
}
textBox1.Text = s;
}

private void textBox1_TextChanged(object sender, EventArgs e)
{

}

private void textBox2_TextChanged(object sender, EventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
Form2 xx = new Form2();

xx.ShowDialog();
}



}

}