Urgent help for counting serial data using timer

Hello all,

I am a newbie and i am totally lost.Do help me.

I want to accurately find baud rate.

I have already programmed such that if i send character 'i' i get some value from my microcontroller.


But the problem is i dont know how to program this:


In 10 sec, how many times I can transmit 'i' and receive data.

I thought all i have to do is set a timer that counts till ten and in the meanwhile transmit 'i' but i found that the timer does not seem to work parallely at all.


here is the code which dint work.

Code:

---


Public Class Form1
    Dim i As Integer
    Dim count As Integer
    Dim txt As String


    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Timer1.Enabled = True

    End Sub

    Private Sub calculate_transmit()
        Do While i < 10
            SerialPort1.WriteLine("i")
            txt = SerialPort1.ReadChar
            count = count + 1
            Debug.Print(txt)
        Loop

        Debug.Print("total 'i' sent = ")
        Debug.Print(count)

    End Sub

    Private Sub Form1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Click

        calculate_transmit()

    End Sub


    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
       
        i = i + 1

    End Sub

 
End Class

---

http://www.vbforums.com/attachment.p...id=47243&stc=1
It looks like you are using VB.Net so I've move your thread to here.

What do you get, if anything, when you run your code?

Any errors?

Well the value "i" from the timer routine which I use to check in calculate_transmit() routine remains always 0 !!

And the loop in the calculate_transmit() happens infinitely as i<10 is always true.