- From: Christopher B. Lirakis <clirakis_at_bbn.com>
- Date: Fri, 29 Aug 2003 08:48:07 -0400
Hi, First let me thank those of you who have been a great help during the compilation of Comedi. The last suggestion to go to version 0.7.67 helped a lot. It appears that the configuration menu is out of the loop, is this intentional? Since I am now successfully talking to my board I have some other questions. I have a NI PCI-1200 board. My first question is that I frequently get a return of 1 when performing a comedi operation. The documentation claims that the return should be 0 for success and -1 for failure. I am currently ignoring this return code since for a comedi_data_read with subdevice 0 works. The question is, is this just a feature and should I just test for negative return values? Second, I tried doing some streaming data. My program didn't work too well so I tried some of the demo programs in comedilib. They all gave similar results. It is acting like the access/setup to the 82C53 timers isn't working correctly. When I query the number of devices I get 5. When I loop through those 5 devices and look at the device type I get: 1 Analog Input 2 Digital Output 3 Unused 4 Calibration DAC 5 EEPROM This results in 3 questions. 1) Would I use sub device 3 to access the DIO portion of this card since there is one, but it doesn't show up? 2) What does it mean that it is unused? (IE:return type of 0) 3) Is there a way I can gain access to the individual registers on the 82C53 to verify operation? Regards Chris -Christopher B. Lirakis, Phd -High Performance Computing -BBN Technologies -127 John Clarke Rd -Middletown, RI 02842 - -(401) 849-2543 (voice) - Front Desk -(401) 848-3537 (voice) - Direct Line. -(401) 849-8611 (fax) -(401) 788-4607 (cell) -(401) 872-5689 (Pager) - - http://www.bbn.com
Received on 2003-08-29Z11:48:07