- From: David Schleef <ds_at_schleef.org>
- Date: Wed, 23 Jul 2003 14:01:03 -0700
On Wed, Jul 23, 2003 at 01:12:50PM -0700, Michael Borland wrote: > I'm trying to use the Measurement Computing PCI-DAS1602/16 with both an > A/D pacer and an external trigger to start the scan. My application is > that I want an external trigger to start the scan, with samples taken > for all channels in burst mode each time the pacer trigger comes in. > > I thought I could do this with > cmd->start_src = TRIG_EXT; > cmd->scan_begin_src = TRIG_EXT; > cmd->convert_src = TRIG_NOW; > cmd->scan_end_src = TRIG_COUNT; > cmd->scan_end_arg = n_chan; > cmd->stop_src = TRIG_COUNT; > cmd->stop_arg = n_scan; > > However, comedi_cmd_test tells me that I have a source conflict. As I > understand the board, the start command can only use the external > trigger, while the scan_begin command can only use the A/D pacer, so > there should be no conflict. TRIG_EXT means something different for > those two commands, or should. > > Am I misunderstanding something? Yes, you should be using start_src = TRIG_NOW. dave...
Received on 2003-07-23Z20:01:03