Hello,
I'm trying to read a serial port data from a controller and plot it using chart. I could read the data from the controller and see the data in a textbox earlier. Now I'm trying to use a chart along with the textbox. There are complication when I'm trying to use both together. I get an exception because I'm trying "data = sp.ReadLine();" for chart. I'd like to keep the textbox just to verify what I'm plotting, but I understand that I can also do that using putty. There's no response even when I use only the chart to plot. And I cannot pin-point the problem. Because to my understanding I think I have followed the steps to establish it, but then I'm failing anyway! Please do have a look at what I have tried so far and please do let me know if I'm doing something wong.
Chart and Form1
namespace Serial_receive
{
public partial class Form1 : Form
{
string t;
SerialPort sp;
double rt = 0;
//Boolean i = false;
private string data;
private DateTime datetime;
public Form1()
{
InitializeComponent();
Control.CheckForIllegalCrossThreadCalls = false;
// User can already search for ports when the constructor of the FORM1 is calling
// And let the user search ports again with a click
// Searching for ports function
SearchPorts();
}
private void Form1_Load(object sender, EventArgs e)
{
comboBox1.DataSource = SerialPort.GetPortNames();
timer1.Start();
Text = "Serial Channel to FRDM-KW40Z";
}
private void TextBox1_TextChanged_1(object sender, EventArgs e)
{
}
private void timer1_Tick(object sender, EventArgs e)
{
rt = rt + 0.1;
}
private void chart1_Click_1(object sender, EventArgs e)
{
ChartArea CA = chart1.ChartAreas[0]; // quick reference
CA.AxisX.ScaleView.Zoomable = true; // see small button on the horizontal scroll for reset??
CA.CursorX.AutoScroll = true;
CA.CursorX.IsUserSelectionEnabled = true;
//
var dataBlocks = data.Split('\n');
foreach(var block in dataBlocks)
{
var numbers = block.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
rt += 100; //some time interval
for (int i = 0; i<numbers.Length; i++)
{
double n = double.NaN; //represents a value that is Not a Number. Field is constant
bool ok = double.TryParse(numbers[i], out n);
if (ok) chart1.Series[i].Points.AddXY(rt, n);
else
{
int p = chart1.Series[i].Points.AddXY(rt, n);
chart1.Series[i].Points[p].IsEmpty = true;
Console.WriteLine("well shoot! try again..");
}
}
}
}Combox1 for listing available ports and connecting
private void button1_Click_1(object sender, EventArgs e)
{
//comboBox1.Items.Clear();
SearchPorts();
}
void SearchPorts()
{
string[] ports = SerialPort.GetPortNames();
foreach (string port in ports)
{
comboBox1.Items.Add(port);
}
}
private void comboBox1_SelectedIndexChanged_1(object sender, EventArgs e)
{
if (sp == null || sp.IsOpen == false)
{
OpenCloseSerial();
}
}
private void button2_Click_1(object sender, EventArgs e)
{
// Catch exception if it will be thrown so the user will see it in a message box
OpenCloseSerial();
}
void OpenCloseSerial()
{
try
{
if (sp == null || sp.IsOpen == false)
{
t = comboBox1.Text.ToString();
sErial(t);
button2.Text = "Close Serial port"; // button text
}
else
{
sp.Close();
button2.Text = "Connect and wait for inputs"; // button text
}
}
catch (Exception err) // catching error message
{
MessageBox.Show(err.Message); // displaying error message
}
}
void sErial(string Port_name)
{
try
{
sp = new SerialPort(Port_name, 115200, Parity.None, 8, StopBits.One); // serial port parameters
sp.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
sp.Open();
}
catch (Exception err)
{
throw (new SystemException(err.Message));
}
}Textbox and chart data and saving data as text file;
private void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
{
if (e.EventType == SerialData.Chars)
{
if (sp.IsOpen)
{
string w = sp.ReadExisting();
if (w != String.Empty)
{
Text += "\r\n";
Invoke(new Action(() => TextBox1.AppendText(w)));
}
}
}
data = sp.ReadLine();
chart1.Series["Data1"].Points.AddXY(rt, data);
Invoke(new EventHandler(displayData_Event));
}
private void displayData_Event(object sender, EventArgs e)
{
datetime = DateTime.Now;
string time = datetime.Day + "/" + datetime.Month + "/" + datetime.Year + "\t" + datetime.Hour + ":" + datetime.Minute + ":" + datetime.Second;
//data.AppendText(time + "\t" + data + "\n");
}
private void button3_Click_1(object sender, EventArgs e)
{
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.InitialDirectory = @"C:\Users\varman\Documents\";
saveFileDialog1.Title = "Save text Files";
saveFileDialog1.CheckFileExists = true;
saveFileDialog1.CheckPathExists = true;
saveFileDialog1.DefaultExt = "txt";
saveFileDialog1.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*";
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
File.WriteAllText(saveFileDialog1.FileName, TextBox1.Text);
TextBox1.Text = saveFileDialog1.FileName;
}
}
}
}Thank you very much for your time. Good day.
Cheers,
Ram.
