Pic p16f882 and serialport

[EgrK]

hellow
i want to send the string y23 followed by newline (CR then LF) this is done by file.asm then read that string by c# program (file2.cs )
those are my two program

loop	        movlw	0x79
		call	snd
		movlw	2
		call	snd
		movlw	3
		call	snd
                movlw	0x0D	;CR
		call	snd	;Send CR
		movlw	0x0A	;LF
		call	snd	;Send LF
		goto	loop

and this is the c# program
using System;
using System.Collections;//.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
using System.Threading;

namespace graphic1
{
    public partial class Form1 : Form
    {   SerialPort sp = new SerialPort();
        int i,j;
        string str;
        public Form1()
        {   InitializeComponent();
            sp.PortName = "com1";
            sp.BaudRate =  115200;        // 9600;
            sp.DataBits = 8;
            sp.Parity = Parity.None;
            sp.StopBits = StopBits.One;
            sp.Handshake = Handshake.None;
            sp.ReadTimeout = 15000;
            sp.WriteTimeout = 15000;
            sp.DataReceived += serialPort_DataReceived;
            sp.Open();
        }
       //
        void serialPort_DataReceived(object s, SerialDataReceivedEventArgs e)
        {
            byte[] data = new byte[sp.BytesToRead];
            sp.Read(data, 0, data.Length);
            //MessageBox.Show(data.ToString());
            str=ByteArrayToString2(data);
            MessageBox.Show(str);
        }
}
}

i could see very long string in the messageBox and it becomes longer and longer
need your help

 

[zia]

because u using 'goto loop' again and again.

 

[EgrK]

        void serialPort_DataReceived(object s, SerialDataReceivedEventArgs e)
        {
            //the program works when i wrote those line
            str=sp.ReadLine();
            MessageBox.show(str);
           //i did not removed the goto loop 
        }

 

[paulfjujo]

hello,


you didn't send the string y23 !

y=0x79 ..ok
but 2 is 0x32
and 3 -> 0x33
and add a delay betwen each invoice
or your PC buffer will overload..

 

[EgrK]

thanks for your help. i was interested to get any message from the Pic no matter what was the character is.
i should send .2 then .3 followed by CR and LF
it works thanks again