Re: [casper] Interesting memo on digitizers and data transmission

2009-10-18 Thread Dan Werthimer
hi john, regarding the recent NRAO memo on word boundry detection (in your link below): i think the early ATA engineers tested prototype hardware that didn't use 8/10 encoding in high speed serial links. (since the data is noise like, one shouldn't need two extra bits to insure sufficient trans

Re: [casper] Interesting memo on digitizers and data transmission

2009-10-18 Thread John Ford
> > hi john, > > regarding the recent NRAO memo on word boundry detection > (in your link below): > > i think the early ATA engineers tested prototype hardware > that didn't use 8/10 encoding in high speed serial links. > (since the data is noise like, one shouldn't need two > extra bits to insure

Re: [casper] Slow HD write speed

2009-10-18 Thread Kjetil Wormnes
Hi David, Thank you so much for that. It was extremely helpful. We were indeed mounting the drive syncronously, *and* the USB is falling back to OHCI. Following your suggestions and removing the sync flag seems to have helped a bit, so to recompile the kernel next ... cheers Kjetil David G

Re: [casper] The Roach GPIO error in casper library

2009-10-18 Thread Wan.Cheng
Hi David: Thanks for your information. But I find after update to the head release, I could not compile my design any more. An error is received: # ## Block objects creation ## # Problem with block: a10hs1/XSG core config Error using ==>

Re: [casper] The Roach GPIO error in casper library

2009-10-18 Thread Henry Chen
Hi Wan, This means that the definitions of the classes used for the yellow blocks have been updated and something is out of sync in Matlab. All you need to do is to run the command "clear classes" at the Matlab command prompt and that will allow things to reset. This is among the least helpful e

Re: [casper] The Roach GPIO error in casper library

2009-10-18 Thread Wan.Cheng
Hi David: It seems to start working now. But I have not finished the compiling. I check the mhs file, the function is implemented correctly. Hope all pin definition are right. Wan -Original Message- From: David George [mailto:david.geo...@ska.ac.za] Sent: Friday, 16 October 2009 6:0

Re: [casper] Slow HD write speed

2009-10-18 Thread Wan.Cheng
Hi David: I recompile the kernel without OHCI. And the disk write is much faster. Problem is solved. Thanks a lot. Cheers Wan -Original Message- From: David George [mailto:david.geo...@ska.ac.za] Sent: Thursday, 15 October 2009 6:31 PM To: Wormnes, Kjetil (ATNF, Marsfield) Cc: casper