streaming input with the PCI_DIO_32HS

Hi,

I'm working on making changes to the ni_pcidio driver for
the PCI_DIO_32HS such that it will allow streaming input
with DMA enabled using an external clock for timing.  The
current driver is supposed to support streaming input with
DMA  but with the internal clock only.

Although this is the stated case, I am unable to get
streaming input to function at all. I'm using the select.c
program in comedlib/demo/ as a sanity check. I set up the
card to accept streaming input using comedi_command with the
following inputs:

start:		now	0
scan_begin:	timer	10000000
convert:	now	0
scan_end:	count	32
stop:		count	25

select() returns 1, however, when the read() is attempted,
no data is actually read from the card (read() returns 0).  

I'm using the lastest versions of both comedi and comedilib.

ideas?


cheers,
brent


-- 

--------------------------------------------------------------
Brent M. Ledvina
ECE - Space Plasma Physics

Cornell University
301 Rhodes Hall
Ithaca, NY 14853
v 607.255.4641
f 607.255.6236
--------------------------------------------------------------

Received on 2002-05-31Z16:13:49