Discussion in "General help Guidance and Discussion" started by    har    Jan 21, 2008.
Mon Jan 21 2008, 02:45 PM
can anyone help me in building an VB interface with coding and tutorials.
basically how does the communication between the PC and the microcontroller takes plce through VB interface.
Mon Jan 21 2008, 06:10 PM
all you need to do is add a MSCOMM component in your project. this has been explained in forum many times i think. Please search it once. you might find it.. for sure..
if not we are all here
 har like this.
Tue Jan 22 2008, 04:35 PM
thanks once again, im not yet clear because im not thorough with Visual Basic.i would like to explain my doubt once again by taking the example of the PC remote project:
even in this project there is a form. does this form takes part in the interaction between the microcontroller and PC.
in VOICE INTERACTIVE COLLEGE AUTOMATION SYSTEM PUBLISHED HERE project im intended to enquire attendance of students from phone. so what is the role of VB here.
please kindly help
Tue Jan 22 2008, 06:44 PM
As i said you need to add MSCOMM component in your project..
In Visual Basic 6.0: right click the toolbox and select "Components". Check "Microsoft Comm Control 6.0" and click "OK". Place a MSComm control (it looks like a phone) on your form (it will be invisible at runtime). You can name the control if you like, the default name is MSComm1.

For setting up MSComm1 component..
    MSComm1.CommPort = COM1        'Define COM port available on PC
    MSComm1.Settings = "9600, N, 8, 1"      '9600 Baudrate, No Parity, 8 bits data, 1 Stopbit.
    MSComm1.InputLen = 1                    'Read 1 character/byte whenever Input property is used.
    MSComm1.InputMode = comInputModeBinary  'Input will retrieve data in array of bytes.
    MSComm1.PortOpen = True                 'Open Serial Port COM1.

To read from serial port...
If MSComm1.InBufferCount Then
read_value = MSComm1.Input 'read_value will have whatever is sent to serial port of PC

and to write to serial port..
MSComm1.Output = something_to_send

I hope many things are clear now
 harpdi33 like this.
Tags MSCOMM VB projectserial programming VBCOM port programming Visual Basic
Thu Jan 24 2008, 09:46 AM

if i want to read the com port only when there is a new data received
by using interrupt
so how can we do that
Thu Jan 24 2008, 11:19 AM
for this u can make use of onComm event.
go to properties of mscomm , set RThreshold to 1.
then use code
Private Sub MSComm1_OnComm() 
   If (MSComm1.CommEvent = comEvReceive) Then  ' if something received
        Text3.Text = MSComm1.Input 'save it to text3
   End If
End Sub

whenever new data is arrived , onComm event will be generated(like interrupt) and that data will be saved to text3.
Fri Jan 25 2008, 07:33 AM
Fri Jan 25 2008, 08:06 AM
.net is tough.. never used it
Sat Jun 28 2008, 11:47 AM
can i know where to download the visual basic?what is the programming language use in visual basic?
Sat Jun 28 2008, 01:40 PM
hi cenadius,
visual basic itself is the programming language .
It can be installed as an integral part of Microsoft Visual studio or can be installed seperately. It does not have a freeware or shareware version so u have to buy it from microsoft.

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