Re: Adding scan_begin_src=EXT_TRIG functionality to amplc_pci230 from Ed Lankford on 2004-04-06 (gmane.linux.comedi)

From: Ed Lankford <ed_at_pcsb620.tju.edu>
Date: Tue, 06 Apr 2004 11:06:25 -0400

This A/D triggered scan DMA mode has been a standard mode on 
DataTranslation boards for years.  It can take either a software trigger or 
an external trigger.  The problem as I see it is that if other boards do 
not have this as a standard mode, then a library like Comedi faces a 
problem.  Either support the mode on the boards which have hardware support 
for it and ignore the boards which do not, try to emulate the mode for 
those other boards, or do not support it even for those boards which do 
have the feature.  The choice is not easy for developers.  These types of 
questions make it hard to decide whether to use Comedi versus write your 
own code if you have a board with the feature.

Received on 2004-04-06Z14:06:25