**** BEGIN LOGGING AT Sat Nov 10 02:59:59 2018 Nov 10 05:11:09 cuz ain't... Nov 10 05:11:23 I got the LoadCape in today! Nov 10 05:11:45 I can wait to use it. I have to acquire some info. first. Nov 10 13:30:44 does anyone happen to have a STEP model for a 3.8" LED matrix module around? Nov 10 21:48:01 Hey you...here I am! Nov 10 21:48:54 There is not a .pdf of the schematic on the beagleboard section on GitHub. How should I use this awesome Cape, LoadCape. Nov 10 21:48:57 ? Nov 10 21:52:30 yeah, a bit annoying that they didn't include a pdf Nov 10 21:52:38 weird, there's not even an overlay for it? Nov 10 21:53:08 the table at https://github.com/beagleboard/capes says it's still being prototyped and not in production yet Nov 10 21:53:32 weird Nov 10 21:54:46 jkridner[m]: "load cape" seems to be in production, but https://github.com/beagleboard/capes lists it as "prototype", has no schematic pdf, and bb.org-overlays has no overlay for it Nov 10 21:56:15 it looks like it's a pretty trivial cape, but at the very least one needs to know which pins are used Nov 10 22:04:15 ah, the csv file says: 1=P9.42, 2=P9.41, 3=P9.30, 3=P9.12 (??), 4=P9.27, 4=P9.15 (??), 5=P8.12, 6=P8.11, 7=P8.15, 8=P8.17 ... no idea why outputs 3 and 4 are both listed twice Nov 10 22:05:48 Oh yea! Nov 10 22:05:57 set_: you have a beaglebone with this cape connected? could you run sudo show-pins | sort and pastebin the output? (I'm assuming you have my show-pins utility installed) Nov 10 22:06:09 Hold on. Let me connect it real quickly. Nov 10 22:06:34 I will install the show-pins utility and use the show-pins to get output. Nov 10 22:07:38 strange choice of pins... not what I'd have chosen I think Nov 10 22:13:21 https://pastebin.com/q4ur07cA is the paste of the pins. Nov 10 22:13:30 If you need more pins to show, just tell me. Nov 10 22:13:54 you didn't pipe the output through sort Nov 10 22:14:12 oops Nov 10 22:15:23 https://pastebin.com/GWaDYyVq Nov 10 22:16:58 zmatt: Where did you find that csv file? Nov 10 22:17:20 beagleboard/capes repo, in "scripts" Nov 10 22:17:25 Okay. Nov 10 22:18:33 That helps. I was checking for the .pdf and the software for the .pdf that they have in some other format. Nov 10 22:20:36 I found the sinks. Nov 10 22:21:49 Well...I guess I need to figure out how to use sinks. Nov 10 22:22:06 well the main question is which pins were used for sink3 and sink4 Nov 10 22:22:27 Yeppers. Nov 10 22:22:50 I guess since it is just working, I will type up sothing and see what happens. Nov 10 22:23:02 sothing = something Nov 10 22:23:47 it's suspicious that P9.12 and P9.15 read as high, given that the internal pull-ups are very weak. that either means they're using FETs and no external pull-downs, and that those two outputs are enabled by default, or it means those two pins are in fact not used Nov 10 22:24:46 you should be able to use a multimeter to determine if an output is enabled (conductive) or disabled (non-conductive) Nov 10 22:25:25 Hmm. Okay. I can. I will test it soon. Give me 20 min. on this idea. I am dealing w/ a person right now on another forum. Is this okay? Nov 10 22:25:43 (using resistor or diode measurement mode, and making sure to use the red lead on the sink pin and black lead on ground) Nov 10 22:26:02 Okay. Nov 10 22:26:17 sure, I got other stuff to do anyway Nov 10 22:26:42 it shouldn't be hard to find which pins are used anyway, just toggle pins and see which ones control the outputs Nov 10 22:26:50 *toggle gpios Nov 10 22:27:05 Okay. Nov 10 22:27:13 Gotcha...thank you again. Nov 10 22:42:04 Well...the other fellow took off. I will reply in a bit w/ my findings. Nov 10 22:42:05 ... Nov 10 22:47:03 Well, the sinkOne was coming in around 5v for a bit. Now, nothing. I checked sinkTwo. Nothing. I will keep testing. Nov 10 22:49:25 that's weird, there shouldn't be any voltage on them Nov 10 22:49:38 There is not. Nov 10 22:49:42 Not now...anyway. Nov 10 22:49:49 I just checked w/ diode mode too. Nov 10 22:50:01 I was using resistor mode at first. Nov 10 22:50:05 at least, I don't think so. my impression is that they should act similar to switches/relays Nov 10 22:50:12 Oh. Nov 10 22:50:23 I am unfamiliar w/ sinks. I will read up on them. Nov 10 22:50:35 a sink is something into which current flows Nov 10 22:50:40 oh. Nov 10 22:50:41 Okay. Nov 10 22:50:43 i.e. I assume they switch to ground Nov 10 22:50:59 Yea. There is a gnd on the screw terminals. Nov 10 22:51:18 exactly Nov 10 22:51:31 There is actually a VIN and GND w/ eight sinks. Nov 10 22:51:42 hmm, there's also a VIN? Nov 10 22:51:43 So, 10 screw term. all together. Nov 10 22:51:45 Yes. Nov 10 22:52:04 odd, then I have no idea what the cape does and I suggest waiting for jkridner[m] to respond with a schematic pdf Nov 10 22:52:12 Okay. No issue. Nov 10 22:52:25 Or...I can test away! Nov 10 22:58:47 So...thermal management is what the sink does. I guess you were right about the MOSFET ordeal. How else would this Cape work? Nov 10 22:59:06 it's not talking about heat sinks Nov 10 23:00:24 I know. I cannot find what type of sinks I should be discussing right now. Nov 10 23:00:34 yeah I assumed based on description and pcb appearance that they're like FETs or BJTs, but it doesn't explain what VIN is for Nov 10 23:01:31 Oh. Okay. So, the sink draws in current and the FETs release them as power? Nov 10 23:01:31 like I said, it suggests they're current sinks Nov 10 23:01:36 Oh. Nov 10 23:01:37 Okay. Nov 10 23:01:40 what? Nov 10 23:01:42 no Nov 10 23:01:57 current sinks. Got it. Nov 10 23:02:36 but again, due to the fact it has a VIN that I cannot explain, I don't really want to make further guesses w.r.t. how the cape works, since I simply do not know Nov 10 23:02:45 a schematic is needed Nov 10 23:03:06 switches! I think they are like switches. Nov 10 23:03:23 Okay. I understand. No reason to goof around w/ this now w/out proper info. Nov 10 23:03:23 which is exactly what I said earlier Nov 10 23:03:33 Right on, brother. Nov 10 23:03:54 brother zmatt: In da house w/ info! Nov 10 23:03:56 more specifically, switches to ground Nov 10 23:04:03 Oh. Okay. Nov 10 23:04:06 (which is why they'd be called sinks) Nov 10 23:04:29 Things make more sense w/ info. Fo' shiggidity. Nov 10 23:04:36 Sorry. **** ENDING LOGGING AT Sun Nov 11 03:00:00 2018