RE: comedi_cmd

From: Ong Wee Liat <g0202550_at_nus.edu.sg> · Date: Thu, 14 Oct 2004 19:38:23 +0800

Hi Jan,

	Thanks for your reply.

	I have tried what you said using the cmd.c inside /demo folder.  With only the comedi_command_test() command in a program, it returned the following

start:	now	0
scan_begin:	timer 1000000 (ns)
convert:	timer	5000 (ns)
scan_end:	count	1
stop:		count 200
comedi command test returned 0 (success)

	The parameters that were returned are reflective of what i have set in the comedi_cmd structure.

	However, when i run a program with first a comedi_command_test() command followed by a comedi_command() command, my computer hanged once i started running it!!!  Even the above output for comedi_command_test() did not appear.

	I am quite perplexed by this behaviour.  Have you experienced anything like this before?  I am using comedi-0.7.68 and comedilib-0.7.21 with a measurement computing card pcidas 6034.  I suspect that somewhere in the driver is not behaving properly.

	Thanks

wee

-----Original Message-----
From: Jan Klostermann [mailto:klostermann_at_rhf.de]
Sent: Thursday, October 14, 2004 4:37 PM
To: Ong Wee Liat; comedi_at_comedi.org
Subject: AW: comedi_cmd

Hi Wee!

First of all, this depends a lot of the card and therefore the driver
you use! 
Second point is that not all cards will support this kind of trigger for
the start_src. I guess, if it is implemented in the driver it will
probably be a hardware timer, if not otherwise stated in the driver
description. To check if the driver supports this trigger send the
command to comedi_command_test() and see what it answers - then you
know, if it is going to work out at all...

Jan

-----Ursprüngliche Nachricht-----
Von: comedi-admin_at_comedi.org [mailto:comedi-admin_at_comedi.org] Im Auftrag
von Ong Wee Liat
Gesendet: Donnerstag, 14. Oktober 2004 08:45
An: comedi_at_comedi.org
Betreff: comedi_cmd

Dear all,

	I am a little question on comedi_cmd().  

	I wonder when i put cmd->start_src=TRIG_TIMER and
cmd->start_arg=1000000, is this timer a hardware timer or a software
timer?

	Thanks

wee

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