Re: Serial comms and cotrolling the RTS line

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#10363

From: Bob Gonder
Date: Tue, 20 Apr 2004 18:06

25 lines
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JoeBlack wrote:

>    SetCommMask(hComm,EV_TXEMPTY);

Check the return value, or do GetCommMask to verify.

> WriteFile(hComm,dta.c_str(),static_cast<DWORD>(dta.Length()),&NOBW,NULL);

Check the return value.

>    while (evt != EV_TXEMPTY)
>    {
>     WaitCommEvent(hComm,&evt,0);

Check the return value.

>     if (b)
>      EscapeCommFunction(hComm,SETRTS);
>        else EscapeCommFunction(hComm,CLRRTS);

Return values?

>Unfortunately, the WaitCommEventFunction returns immediately and the RTS
>line is dropped straight away, does anyone know what I've done wrong, or how
>to control the RTS another way so that it drops after my data is sent.

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From: Bob Gonder <notbg@notmindspring.invalid>
Newsgroups: borland.public.cppbuilder.nativeapi
Subject: Re: Serial comms and cotrolling the RTS line
Date: Tue, 20 Apr 2004 11:06:16 -0700
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