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Join Date: Oct 2008
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Hi all,
im doing a uni project and ive run into a little trouble
im writing a program in cpp (has to be cpp because of other constraints)
this program will get values from a file and depending on the values, send a high or low signal to the corresponding output pin on a serial port
i have done some research, but i cant get a solid answer on how to write from a program to a specific pin on a serial port
all i know is that i have to specify the com port (com1 or com2 etc) and the pin
any help on this would be MUCH appreciated
thanks
EDIT: im using windows xp pro, if that helps.
im doing a uni project and ive run into a little trouble
im writing a program in cpp (has to be cpp because of other constraints)
this program will get values from a file and depending on the values, send a high or low signal to the corresponding output pin on a serial port
i have done some research, but i cant get a solid answer on how to write from a program to a specific pin on a serial port
all i know is that i have to specify the com port (com1 or com2 etc) and the pin
any help on this would be MUCH appreciated
thanks
EDIT: im using windows xp pro, if that helps.
Last edited by hugoboss911 : Oct 22nd, 2008 at 7:26 am.
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Join Date: Aug 2005
Location: near St Louis, Missouri, USA
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you need to use the win32 api communications functions
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> EDIT: im using windows xp pro, if that helps.
But which compiler?
Not some fossil like TurboC by any chance?
> send a high or low signal to the corresponding output pin on a serial port
Er, you do know what a serial port looks like right?
Or even how a serial port works?
http://www.lammertbies.nl/comm/cable/RS-232.html
The only output pins which have a level associated with them are CTS and RTS.
But which compiler?
Not some fossil like TurboC by any chance?
> send a high or low signal to the corresponding output pin on a serial port
Er, you do know what a serial port looks like right?
Or even how a serial port works?
http://www.lammertbies.nl/comm/cable/RS-232.html
The only output pins which have a level associated with them are CTS and RTS.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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Posting Pro in Training
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Originally Posted by Salem 
> EDIT: im using windows xp pro, if that helps.
But which compiler?
Not some fossil like TurboC by any chance?
> send a high or low signal to the corresponding output pin on a serial port
Er, you do know what a serial port looks like right?
Or even how a serial port works?
http://www.lammertbies.nl/comm/cable/RS-232.html
The only output pins which have a level associated with them are CTS and RTS.
Why are you providing this information. I can't imagine someone trying to work with serial ports if they don't know the first thing about them.
Thats about as bad as if i was to set out writing a driver program in assembly for a microcontroller to interact with a keyboard. And then not looking at how the keyboard transmitts and recievers data.
That was a fun project btw, i also did it using shift registers aswell as assembly. I'm a bit of an electornics geek too
Chris
Knowledge is power -- But experience is everything
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