[12:47:32] NASSP Logging has been started by thymo
[12:47:34] <Thymo> Good afternoon!
[15:03:50] <n7275> Hi Thymo
[15:04:45] <n7275> what's up?
[15:41:13] <thewonderidiot> good morning!
[17:12:06] <n7275> hey Mike
[17:13:01] <thewonderidiot> what's up?
[17:27:20] <n7275> still super busy, unfortunately
[17:29:18] <thewonderidiot> :(
[17:35:47] <n7275> things will get better...one way or another
[17:37:58] <thewonderidiot> morning!
[19:10:07] <Thymo> o/
[19:10:24] <Thymo> n7275: My connection got borked the other day. So hi again. :p
[19:49:49] <n7275> hi Thymo
[19:51:22] <thewonderidiot> hey hey
[19:51:27] <n7275> hey Mike
[19:52:50] <thewonderidiot> n7275, we got the CM PCM largely working yesterday. my FPGA is able to lock onto the NRZ data stream from it, and I have a python script that seems to be correctly decoding all of the prime frames into measurement channels and forwarding them to a telemetry display program
[19:53:16] <thewonderidiot> we haven't identified all of the input pins yet but we mapped out a lot of them
[20:10:14] <thewonderidiot> one really interesting thing that we ran into is that the analog ground used for analog measurements is not tied to spacecraft ground inside the PCM
[20:10:38] <thewonderidiot> *but* if you don't connect the two grounds, all of the analog channels read off-scale high
[20:11:15] <thewonderidiot> which had us confused and concerned for a while
[22:45:19] <n7275> how are you decoding the frames?
[22:47:12] <n7275> also, thewonderidiot, that sounds like it's trying to avoid some kind of ground loop situation
[22:48:28] <thewonderidiot> yep, that's what we think too
[22:48:43] <thewonderidiot> I can send you my awful, not-fully-vetted python script
[22:50:37] <thewonderidiot> basically just grabbing the frame number from the sync word, and then mapping each byte into the proper group/channel according to the current frame number
[22:51:29] <thewonderidiot> as it completes a group, it packs that group into a packet and sends it to the telemetry viewer
[23:16:13] <n7275> okay, that's kind of the direction I'm going with my decoder
[00:37:49] <thewonderidiot> if you get a decoder working that can take raw bytes representing the frames, I'd be happy to hook it up to the real PCM :)
[03:26:02] <n7275> if you can send the bytes to a TCP socket, our telemetry client might actually be able to do something with them
[04:53:02] <thewonderidiot> yeah, that's very easy to do! what format is it expecting?