[remyamanoj]

could anyone tell me how to send data from multiple textboxes to serialport.iam using 4 textboxes and i need the data entered in the textboxes to be send to serialport to pic and get output from pic.when iam sending data only one textbox data is send through serialport.here is my code

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

namespace testing2
{
    public partial class Form2 : Form
    {
        Formload callingForm;
        public Form2(Formload form)
        {
            InitializeComponent();
            callingForm = form;
        }


        private void sndbtn_Click(object sender, EventArgs e)
        {
            if (!callingForm.serialPort1.IsOpen)
                callingForm.serialPort1.Open();

            float Mx1;
           float Mx2;
           float Mx3;
           float Mx4;
            float Cx1;
           float Cx2;
            float Cx3;
            float Cx4;
           Mx1 = float.Parse(txtMx1.Text);
            Cx1 = float.Parse(txtCx1.Text);
           Mx2 = float.Parse(txtMx2.Text);
            Cx2 = float.Parse(txtCx2.Text);
         Mx3 = float.Parse(txtMx3.Text);
            Cx3 = float.Parse(txtCx3.Text);
            Mx4 = float.Parse(txtMx4.Text);
           Cx4 = float.Parse(txtCx4.Text);
           string s = "\x2" + "a" + txtMx1.Text + "b" + txtCx1.Text + "\x3" + "\x2" + "c" + txtMx2.Text + "e" + txtCx2.Text + "\x3"+"\x2" + "w" + txtMx3.Text + "x" + txtCx3.Text + "\x3"+"\x2" + "y" + txtMx4.Text + "z" + txtCx4.Text + "\x3";
            char[] cArr = s.ToCharArray();

            foreach (char c in cArr)
            {
                char[] buff = { c };

                callingForm.serialPort1.Write(cArr, 0, s.Length);
            }
        }

        
    }
}

This post has been edited by JackOfAllTrades: 31 August 2012 - 03:27 AM
Reason for edit:: Fixed code tags

[RudiVisser]

Have you debugged the value of s and cArr in your code? What about stepping through each character being sent to the serial port?

Also, why do you do a float parse and then ignore those variables to construct a string?

[remyamanoj]

when debugging iam getting proper output,but not getting it in my PIC

[RudiVisser]

If Write is being called properly, the next item to check would be if BytesToWrite has anything in it, thus implying that the data hasn't yet being sent.

This is not normally the case for serial port communications, though. The best way to find out if the problem is with your application of the PIC would be to monitor the actual data that is being sent (using some form of serial port traffic monitor) and ensuring that it is indeed being sent. If it is, the problem is with your PIC.