ramv
Newbie level 4
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
Combox1 for listing available ports and connecting
Textbox and chart data and saving data as text file;
Thank you very much for your time. Good day.
Cheers
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
Code:
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..");
}
}
}
}
Code:
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));
}
}
Code:
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;
}
}
}
}Cheers
