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neoaspilet11
Joined: 29 Sep 2005
Posts: 273
Helped: 21
Location: Cebu, Philippines
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 29 Jan 2007 3:23 Serial Port reading in Visual Basic |
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Hello Guys,
Need some help..
1.) I tried to read the input of MSCOM in the code below
Text1.text = MsComm1.input
but it doesnt show anything on the text box. But I put a break point after the line above, and there is a data at MsComm input.
Please help me on this..
Thanks..
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buntheun
Joined: 20 Dec 2006
Posts: 78
Helped: 6
Location: Cambodia
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| 31 Jan 2007 5:06 Re: Serial Port reading in Visual Basic |
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| neoaspilet11 wrote: |
Hello Guys,
Need some help..
1.) I tried to read the input of MSCOM in the code below
Text1.text = MsComm1.input
but it doesnt show anything on the text box. But I put a break point after the line above, and there is a data at MsComm input.
Please help me on this..
Thanks.. |
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amihomo
Joined: 09 Jan 2007
Posts: 186
Helped: 23
Location: Karaj,Tehran,Iran
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| 31 Jan 2007 13:49 Serial Port reading in Visual Basic |
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hi
you must define a buffer variable of type "variant" and then read the mscomm onto the buffer , then put the buffer in the Text1.text .
regards
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CMOS
Joined: 06 Jan 2004
Posts: 672
Helped: 26
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| 31 Jan 2007 15:24 Re: Serial Port reading in Visual Basic |
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| amihomo wrote: |
hi
you must define a buffer variable of type "variant" and then read the mscomm onto the buffer , then put the buffer in the Text1.text .
regards
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\
Why variant ???  MsComm.Input return STRING data type...so you should declare Buffer variable as string.
Anyways here is how you do it.
| Code: |
Private Sub Form_Load()
MSComm1.Settings = "9600,n,8,1"
MSComm1.CommPort = 1
MSComm1.PortOpen = True
End Sub
Private Sub Form_Unload(Cancel As Integer)
If MSComm1.PortOpen = True Then MSComm1.PortOpen = False
End Sub
Private Sub MSComm1_OnComm()
If MSComm1.CommEvent = comEvReceive Then
Text1.Text = MSComm1.Input
End If
End Sub
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mamu_s
Joined: 03 Feb 2007
Posts: 45
Helped: 2
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| 03 Feb 2007 18:44 Re: Serial Port reading in Visual Basic |
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serial port using visual basic...it teach you step by step...[/quote]
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dnhuruag
Joined: 23 Jul 2007
Posts: 17
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| 09 Aug 2007 17:44 Re: Serial Port reading in Visual Basic |
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| ahhh... how i wish i could have a copy of that step by step.... im am using vb6 also and incoming data from microcontroller...
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CMOS
Joined: 06 Jan 2004
Posts: 672
Helped: 26
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| 09 Aug 2007 23:46 Re: Serial Port reading in Visual Basic |
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| dnhuruag wrote: |
| ahhh... how i wish i could have a copy of that step by step.... im am using vb6 also and incoming data from microcontroller... |
You can download it. You have enough points for that!
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aamiralikhoja
Joined: 11 Aug 2004
Posts: 88
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| 26 Aug 2007 2:48 Re: Serial Port reading in Visual Basic |
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| Search msdn documentation for Mscom
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eca
Joined: 25 Jul 2006
Posts: 5
Location: iran
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| 26 Aug 2007 16:16 Re: Serial Port reading in Visual Basic |
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| thank
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karim aslan
Joined: 14 Mar 2007
Posts: 7
Location: egypt
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| 27 Aug 2007 20:36 Re: Serial Port reading in Visual Basic |
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hiiiiiiiiii
are u sure that
Rthreshold=1 mustn't be zero for receiving
Sthreshold=1 for sending
from the properties window
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CMOS
Joined: 06 Jan 2004
Posts: 672
Helped: 26
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| 28 Aug 2007 5:11 Re: Serial Port reading in Visual Basic |
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| karim aslan wrote: |
hiiiiiiiiii
are u sure that
Rthreshold=1 mustn't be zero for receiving
Sthreshold=1 for sending
from the properties window |
If RThreshold=1, the OnComm event of MSCOMM is fired when the receive buffer has 1 character in it. So on every character received, OnComm will be fired. If you want to receive 10 characters and want OnComm to be fired only once after receiving all 10 of them, make RThreshold=10.
SThreshold defines how many characters should be present in transmit buffer before transmission begins. SThreshold=1 means the character will be immediately transmitted, once placed in buffer. IF you want transmission to begin after 10 characters, make SThreshold=10. Generally it is kept 1.
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bhavrana
Joined: 06 Sep 2007
Posts: 3
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| 07 Sep 2007 6:47 Serial Port reading in Visual Basic |
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| Need help in Stepper Motor Control through Parallel Port ..I need to drive 5 motors through parallel port [please help me out
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flemmard
Joined: 08 Sep 2007
Posts: 4
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| 08 Sep 2007 22:05 Re: Serial Port reading in Visual Basic |
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| search stepper motor control in google
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buntheun
Joined: 20 Dec 2006
Posts: 78
Helped: 6
Location: Cambodia
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| 15 Oct 2007 11:21 Re: Serial Port reading in Visual Basic |
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| bhavrana wrote: |
| Need help in Stepper Motor Control through Parallel Port ..I need to drive 5 motors through parallel port [please help me out |
this the sample for you.....
| Code: |
private sub command1_click()
lefts=false
rights=true
Do
DoEvents
out &H378,1
call delay
out &H378,2
call delay
out &H378,4
call delay
out &H378,8
call delay
loop until lefts=true
end sub
Sub delay ()
times= timer
Do
Doevents
loop until time>=times+0.01
end sub
private sub command2_click()
lefts=false
rights=true
Do
DoEvents
out &H378,1
call delay
out &H378,2
call delay
out &H378,4
call delay
out &H378,8
call delay
loop until lefts=true
end sub |
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nishal
Joined: 04 May 2007
Posts: 49
Helped: 3
Location: KOCHI, INDIA
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| 19 Oct 2007 5:46 Re: Serial Port reading in Visual Basic |
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Hi,
Here is my step which i uses for Com port interfacing
Place mscomm in the form
place a timer in the form
set for necessary interval say 300ms
in the timer1.timer event, assign the mscomm.input to a variable and process the variable
the process will continue until u stop the timer event
Good Luck
Nishal
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madicalphy
Joined: 22 Jul 2007
Posts: 35
Helped: 3
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| 28 Aug 2008 6:53 Re: Serial Port reading in Visual Basic |
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| good help in steps
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DB_Man
Joined: 28 Aug 2008
Posts: 4
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| 29 Aug 2008 3:15 Serial Port reading in Visual Basic |
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Hi.
For the delay you could also use
Public Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
In your code use
Sleep x ' whereas x stands for milliseconds to wait
Cheers
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