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abt port programming
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persepherone View Drop Down
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    Posted: 25 December 2004 at 6:25am
i am working on a robotic interface project .presently we use outport commands of C to control the robotic vehicle. we call these complied subroutines from VB or from ASP. can anybody tell me if there is a direct way to implement it.i mean is there any command in VB or ASP which can send a desired byte on a desired port........
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Mart View Drop Down
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Points: 2304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mart Quote  Post ReplyReply Direct Link To This Post Posted: 25 December 2004 at 9:32am
Not in asp but in .net there are tonnes of examples over the internet of how to send commands via the com port, just do a google
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dpyers View Drop Down
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Points: 3937 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dpyers Quote  Post ReplyReply Direct Link To This Post Posted: 25 December 2004 at 9:44am
In vb2-6 you can use most of the win api including the com port stuff and bit-level tcp/ip port stuff. I've written listening and sending apps for both.
 
Asp however is a subset of vb and doesn't include the ability to directly reference the win api. You can however, use vb 4+ to create a dll with an interface api that asp can use. Your current C interface will be faster though.
 
As Mart noted though, asp/vb .net is currently the best way to go for port manipulation through a web app.

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persepherone View Drop Down
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote persepherone Quote  Post ReplyReply Direct Link To This Post Posted: 27 December 2004 at 5:51am
thanx dpyers, 
Can U plz tell me the API that cud be useful to me..  BTW my currect C interface is not fast because i use compiled programs of C those i call from inside VB using the "shell" statement. if i cud implement it directly in VB or asp than their wud be no disk access & thus no delay .

also i tried to search on google but cannot strike to a appropritate solution. if any1 can provide me some solution or a link i wud be highly grateful.
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Mart View Drop Down
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Points: 2304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mart Quote  Post ReplyReply Direct Link To This Post Posted: 27 December 2004 at 9:05am
launching a process in asp.net is quite easy, if you are using inline code (not compiling the asp.net page) insert

<%@ Import Namespace="System.Diagnostics" %>

after the <%@ Page ... %> line. If you are using code behind put Imports System.Diagnostics in the imports section of the class. Then just use Process.Start("MyApp.exe", "parameter1 parameter2")
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dpyers View Drop Down
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.net is the easier way to go. If you're using vb prior to .net though, look for books about the Win32 API for VB. Dan Appleman did a series of them. starting with the Win16 API for win 3.0 and going through to W2K. Carl Franklin also din some useful api books. He used to have a site called Carl and ?????'s Visual Basic ????? which was a very good resource for building components and dll's.

Appleman and Franklin cover the api quite well and have a lot of examples of bulding com port controls.
 
I've got a couple of different books entitled "Visual Basic Internet Programming" thaat cover the details of using the winsock api through vb for various specific internet protocols - e.g. ftp, http, gopher, etc.

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