Hi Ryan. We had this problem, which appeared to be a "lockup". I think that Glenn and some others corresponded about it, and it was due to trying to read/write bytes instead of words over the opb bus with a buggy kernel or a buggy library.
You might search through the mailing list for Glenn's name in about November of last year. John > Hey all, > > I'm trying to test out a new bit file (it uses the "pcore" feature and > has 4 black boxes under the hood for what it's worth). *On one ROACH2 it > works just fine* (in the context of this problem). > > On the other one, for ~1/5 of the registers, upon reading that register > the ROACH2 stops responding to all katcp commands. From dmesg, it looks > like tcpborphserver is crashing. It appears that the registers which > kill it are deterministic across programmings. It also looks like the > registers which fail are all shared_brams, but there is nothing > exceptional about the ones which fail, imho > > Attached are the results of a python script on the two roaches, and a > dmesg output of the failed board. In addition, pictures of the > configuration for both roaches. > > Anyone seen this before? > > -- > --Ryan Monroe > 626.773.0805 > >
