Thanks for the help!
Craig
*------------------------------
*
*Message: 2
*Date: Tue, 12 Dec 2006 21:04:18 +0000
*From: Paul <bdi4emc(a)bulldoghome.com>
*Subject: Re: [Bdi4emc-help] BDI - Motenc-Lite Issue?
*To: bdi4emc-help(a)lists.ourproject.org, "abdul.rafiq(a)yahoo.com"
* <arafiq1(a)yahoo.com>
*Message-ID: <200612122104.18951.bdi4emc(a)bulldoghome.com>
*Content-Type: text/plain; charset="iso-8859-1"
*
*On Sunday 10 December 2006 22:10, Craig Gadd wrote:
*> I've been working on my BDI-EMC system this weekend and came across a
*> problem that I think may be software related... My setup is a
*> Motenc-Lite card with a 7525 IO termination board, and a 7535 IO board.
*>
*> I have my control system prototyped on a table and have been struggling
*to
*> get any motion out of the motor(s). I attributed the problem to my
*wiring
*> "skills" and my proof of damaged was that vsitest.c (available on the
*Vital
*> site) reported a "Segmentation fault" when compiled and run on BDI 4.50.
*
*A segfault is usually caused by a null pointer - Looking at the source,
*line
*79 is the culprit...
*
* if (dev == NULL) {
* printf ("\nVendor %X Device %X\n", dev->vendor_id, dev->device_id);
* printf ("PCI Motenc Card Not Found\n");
* return -1;
* }
*
*The first printf uses dev which will always be NULL, hence the segfault...
*
*> Before I sent my card back, I went and down-revved BDI to version 4.38
*and
*> the segmentation fault error went away. The utility seems to function
*> properly allows me to communicate with the board, send voltage to the
*> amplifier etc. Any thoughts?
*
*It looks like the the later versions of libpci require the use of
*pci_fill_info() before any data can be read from the internal structures -
*Without valid data, the tests for vendor & device ID were failing and
*triggering the segfault.. Attached is an updated vsitest.c that runs with
*the
*card I have here.
*
*Abdul: The changes should be compatable with earlier versions of libpci, so
*you may want to update the MOTENC-Lite & MOTENC-100 files..
*
*
*Regards, Paul.
*
*
*
*------------------------------
*
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*End of Bdi4emc-help Digest, Vol 11, Issue 9
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