Programming the RS232 port in C++

Hi, I need to send ascii strings to a device via a rs232 port.

Is it possible to just set up the port, and send the string, assuming no hand shaking is needed?


I browsed through alot of codes and they are all so complicated and most don't compile which I don't know why.


Thanks very much. I am not proficient in using the C/C++ language for accessing serial ports hope someone can help me out.

Thanks!
Nick

Please start by telling us which OS and Compiler you have.

Hi, I'm using Windows XP and Visual C++ 2005 Express


Thank you.
Nick

Some info:
http://lvr.com/serport.htm

Hi, i tried the following codes but I have this error:

C:/Dev-Cpp/thisistestingonly.cpp: In function `int main()':
C:/Dev-Cpp/thisistestingonly.cpp:81: invalid conversion from `int*' to `DWORD*'

code:
status = WriteFile(hCom,
&sdata,
length,
&bytes_written,
NULL);


Can anyone help with this? I have no idea what is wrong.

Thanks
Nick

Seems pretty obvious to me.
One of the parameters you have a & in front of should have been declared as a DWORD and not as an int.

Here's a clue ...

[code]
BOOL WriteFile( HANDLE hFile,
LPCVOID lpBuffer,
DWORD nNumberOfBytesToWrite,
LPDWORD lpNumberOfBytesWritten,
LPOVERLAPPED lpOverlapped
);
]/code]

Thanks all!, I appear to have results now, jus that I have yet the opportunity to use it on the equipment.

Thanks!