From tmp543901 at buckeye-express.com Fri Sep 16 01:36:54 2022 From: tmp543901 at buckeye-express.com (bsr) Date: Thu, 15 Sep 2022 19:36:54 -0500 Subject: [OneRNG-Discuss] LED frequently going dark for various lengths of time In-Reply-To: <5779696.KlZ2vcFHjT@rata> References: <5779696.KlZ2vcFHjT@rata> Message-ID: <370a95c8-6577-c361-e1be-1256b25147f4@buckeye-express.com> On 7/26/22 15:10, Paul Campbell wrote: > On Wednesday, 27 July 2022 7:16:08 AM NZST bsr wrote: >> I'm having an issue with one of my OneRNG units. For the past few >> months I have observed the LED occasionally going dark. When I first >> started to notice it would be dark about 3-4 seconds but lately the >> duration is sometimes longer (10 seconds) and the frequency of >> occurrence has increased as well. My issue seems very similar as >> described in a previous discussion, except Hans was using v1 hardware >> and mine is v3 - > > there is/was a firmware bug I found a while back that did cause behavior like > this - there's a fix for it (not a firmware update) in the last couple of > software releases > > Paul > > I meant to post this a long time ago... but here is what I found. I had my onerng config set to cmd3 operation (raw avalanche plus RF - no whitening) and was experiencing the behavior I described. Switching to cmd0 (default) my ONeRNG functions normal. Checking with a scope when set to cmd3 operation, I didn't notice any change in the waveform at T3 as the light would go dark. It was hard to catch but I did get a couple of direct device dumps via dd that showed some really strange data. I posted one of those dumps here: https://dpaste.com/6AGA3KZE9.txt The spamming of zero in the output stream seems to hit around offset 0x340 and seems to resolve around 0x1838. Since I didn't notice any change on T3 (using cmd3) and I am not seeing this behavior using cmd0 (no RF) it seems probable that RF is somehow responsible(?). I haven't dug deeper but could RF interference really cause such issues? From tmp543901 at buckeye-express.com Fri Sep 16 01:48:57 2022 From: tmp543901 at buckeye-express.com (bsr) Date: Thu, 15 Sep 2022 19:48:57 -0500 Subject: [OneRNG-Discuss] correction Message-ID: <638c7131-d34b-d155-1bf7-97bcd08e2705@buckeye-express.com> Sorry, I meant I was seeing lots of NULL values 0x00, not zero.