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lilljocke



Joined: 28 Dec 2004
Posts: 34
Location: Sweden
lilljocke
Is there someone who can show me how to receve data from the com port??
Post 20 Mar 2006, 17:10
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UCM



Joined: 25 Feb 2005
Posts: 285
Location: Canada
UCM
sorry, i don't know much about this, but CreateFile should be able to open the com port for you
i don't know much else, scour the Win32 API

edit: there is a communications section in Win32 API, it describes this
for example, use GetCommState and SetCommState to set like baud rate, parity, etc..
Post 20 Mar 2006, 21:45
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farrier



Joined: 26 Aug 2004
Posts: 274
Location: North Central Mississippi
farrier
lilljocke,

Read the info here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfiles/html/msdn_serial.asp

UCM was correct, you use CreateFile to open a port, and ReadFile/WriteFile to read and write from/to the port. Setting "interrupts" and handlers is more complicated. I use this technique to read data from a truck scale and write info to a slip printer and it works.

Another alternative is to use a "device driver" such as the WinIO library which you can find at www.internals.com This gives you access to the serial ports in a way which would be familiar to DOS programmers using in and out port instructions. I have never used this, but others say it works well.

hth,

farrier

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Post 20 Mar 2006, 23:32
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