Re: DTR Flow Control

[Mike McCormack]

Hi Michael,
> Is DTR flow control supported?

No. However the Win32 API uses very confusing names, so make sure the
app is really asking for DTR/DSR flow control.

DTR_CONTROL_ENABLE does not mean DTR/DSR flow control is enabled, it
means turn on the DTR line permanently. Only DTR_CONTROL_HANDSHAKE
means the serial port should use DSR/DTR handshaking. (AFAIK,
DTR_CONTROL_ENABLE and DTR_CONTROL_DISABLE flags are not correctly
handled in the current wine... they should actively turn on or turn
off DTR).

Additionally, there were some problems in the
GetCommState/SetCommState code that saw DTR_CONTROL_HANDSHAKE
accidently turned on, so make sure that it is really the application
that is requesting it.

As Marcus pointed out, the linux kernel itself does not support
DTR/DSR flow control, but given the time and motivation, we could
solve the problem if you really need to make this work...

Mike



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DTR Flow Control

In <B1515964759(a)i01sv4138.ids1.intelonline.com>, on 02/24/02 
   at 07:34 PM, Mike McCormack  <mike_mccormack(a)start.com.au> said:

:> Is DTR flow control supported?

:No. However the Win32 API uses very confusing names, so make sure the app
:is really asking for DTR/DSR flow control.

This is the key point, because if the application itself supports DTR/DSR
handshaking, then all the support which it needs is the ability to sense
DSR and to set/reset DTR.

-- Chuck Crayne
-----------------------------------------------------------
ccrayne(a)crayne.org
-----------------------------------------------------------

DTR Flow Control

On Sun, 24 Feb 2002 ccrayne(a)crayne.org wrote:
> This is the key point, because if the application itself supports DTR/DSR
> handshaking, then all the support which it needs is the ability to sense
> DSR and to set/reset DTR.
>
> -- Chuck Crayne
> -----------------------------------------------------------
> ccrayne(a)crayne.org
> -----------------------------------------------------------

Yes, it should be able to do that.

Lawson