Thanks for the help everyone, To answer Matthew's suggestion, I didn't check the clock source, but I have no reason to suspect it is flaky. When it happened yesterday there were a couple students trying to take data, so I didn't have a lot of time to debug.
To answer Andrew and Jason's suggestions, I'm not using the CX4 ports in my design. As far as I know, my iBOB has not been patched with nylon washers. Just to clarify, this would be a problem even if I'm not using 10 GbE in my design? Laura On Thu, Nov 18, 2010 at 12:26 AM, Jason Manley <[email protected]> wrote: > Yes, and related to that is the iBOB CX4 fix with nylon washers. Has yours > been patched? This causes trouble even if there's no cable plugged in as it > shorts out a voltage rail. See Memo22: > http://casper.berkeley.edu/papers/Science_Safety_001.pdf > > Jason > > On 18 Nov 2010, at 07:06, Andrew Martens wrote: > >> Hi Laura >> >> I have seen strange iBOB behaviour due to an incorrectly plugged in CX4 >> cable. It must have been bumped at some point and, although still plugged in, >> was causing strange behaviour. The iBOB would report being successfully >> programmed but the LEDs would do strange things. Not sure if this is >> related to your problem though. >> >> Regards >> Andrew >> >> >> >> On 17 November 2010 21:11, Laura Spitler <[email protected]> wrote: >> Hi everyone, >> >> I'm having a problem with an iBOB-based spectrometer. The design is a >> simple instrument used to measure neutral hydrogen for our >> undergraduate radio lab course. The spectra are transmitted over the >> 10/100 Mb ethernet using a modified main.c file where I read the >> channels out of a shared BRAM, packetize them, and send the using UDP. >> They are then grabbed using the software "gulp", which is similar to >> tcpdump. >> The problem is occasionally the iBOB seizes up. The "sanity LEDs" go >> dark and no data is transmitted. After some about of time, the iBOB >> comes back to life and things resume as normal. >> >> Does anyone have any idea what could cause the iBOB to "go dark" like this? >> Thanks, >> Laura >> >> > >
