Re: Pull TxD high in serial communication VC++
From: Thomas Lutz (tom_at_taltech.com)
Date: Wed, 21 Apr 2004 15:55:52 GMT
To set the TX line high you can use the SetCommBreak funtion to issue
a BREAK function. The BREAK function sets the TX line high until you
clear the BREAK by calling the ClearCommBreak function.
For more serial I/O tips tricks and free utilities, please visit
On Tue, 13 Apr 2004 09:38:24 +0200, "Ch. Kessler"
>after studying the documentation in MS Visual C++ I still do not
>understand how to pull up the TxD line (i.e. pin3 in a 9 pin RS232)
>in the serial Com-port. In old
>times this has been done by output of 64 to the base address+3 of
>e.g. Com1. The DCB class does not seem to address this.
>I want to provide power by TxD to an a/d converter.