**** BEGIN LOGGING AT Sun Dec 04 02:59:57 2022 Dec 04 08:02:03 hello all, I have a BB black and I think that i broke it, When i power on the D1 just flick one time and that it. Nothing more. I thought that something is in short and the beaglebone can not start Dec 04 08:02:19 but how can i find what is broke? Dec 04 08:05:08 Guest41: if the power led briefly flashes and nothing more, that implies serious hardware damage, typically to the SoC itself Dec 04 08:05:27 e.g. due to I/O being damaged by overvoltage Dec 04 08:07:28 ok, it is possible to solve it? I read on an forum about a guy that have an issue with AIN port and fix it by removing FB2  https://community.element14.com/products/devtools/single-board-computers/next-genbeaglebone/f/forum/30610/beaglebone-black-unable-to-power-on Dec 04 08:07:41 how can i figure where is the problem? Dec 04 08:08:05 maybe is just a capacitor broken Dec 04 08:10:16 Guest41: that guy specifically damaged analog inputs (again, probably due to overvoltage)... disconnecting the adc power supply (by removing FB2) allowed the beaglebone to boot again in his particular case, albeit now without analog inputs Dec 04 08:11:48 if you have reason to believe you blew up an analog input then you could try the same workaround, but the same workaround does not apply in any other situation Dec 04 08:15:51 what's happening is that overvoltage on a pin can damage the ESD protection on that pin inside the chip in a way that results in an internal short-circuit of the I/O power supply rail to ground. the PMIC detects the overcurrent that results from this short and immediately powers off Dec 04 08:19:34 i was trying to use and lcd with an 4.3' lcd cape.. but i moved the lcd connector when it was power on Dec 04 08:21:22 "moved" ? Dec 04 08:22:03 disconnect and connect Dec 04 08:22:15 yeah that sounds like an incredibly bad idea Dec 04 08:23:24 it is a bad idea :D Dec 04 08:24:25 an lcd screen requires some relatively high voltages, and those connectors are definitely not designed to be hotpluggable... you probably either caused a brief short between pins or simply connected some pins but not others, either way resulting in a bad voltage spike on some data line or something Dec 04 08:24:31 that would be my guess Dec 04 08:25:23 just to confirm, you've tested the beaglebone without the cape? Dec 04 08:26:04 yes, and i have the same behavior Dec 04 08:27:09 k, yeah, if there's lines on that connector that go directly to the bbb then I can easily imagine trying to hotplug it could insta-fry the bbb Dec 04 08:36:23 Guest41: in general, avoid hotplugging things that aren't designed to be hotpluggable Dec 04 08:38:05 that is a really good advise. but i think is a bit late. It is possible to do something for my bbb. how can i check if there is something in short to gnd? where i suppose to look first? Dec 04 08:40:18 in this situation it sounds like a waste of time. based on what you've said it seems virtually certain that you've damaged the SoC itself Dec 04 08:41:37 sorry Dec 04 08:42:34 it is ok, i did not think that i can fix it. I just want to check. Dec 04 08:42:53 you could probably confirm which of the on-board power supply rails is getting shorted to ground by measuring these lines with a scope while attempting to power up, but that's already not easy and there's very little you can do with the information Dec 04 08:43:45 I already try the workaround for AIN port because LCD cape have AIN0-AIN3 connected. But did not help Dec 04 08:45:08 anyway if the TPS65217 or any other SoC is brocken i don't think i can change it. it is easier to buy other BBB Dec 04 08:45:08 yeah, I was about to mention that, but if that had no effect then it's a digital I/O that's blown and then there's nothing you can do Dec 04 08:45:23 not the TPS, the AM3358 Dec 04 08:46:13 the TPS is the PMIC, it generally doesn't fail I think Dec 04 08:48:22 thank you anyway Dec 04 23:30:02 Using pru shared memory, what is the highest address I can use? The starting adress is 0x10000, and from what I see there are 12 kB of shared memory. Is the highest address 0x13000? Dec 05 00:12:49 nick12310: more precisely, 0x13000 is the first adddress that's out of bounds Dec 05 02:22:41 I missed Friday Funday. I am so sorry. Dec 05 02:23:04 My ServoCape does wonders thanks to Ben and @zmatt! Dec 05 02:23:34 Thank you @zmatt. The articulations in source pronounce oneself well. Building! Dec 05 02:24:28 Now, if I could only add this darn JavaScript in the server to handle pages not reloading, I would be in it to win it! Dec 05 02:27:45 Off to test it! **** ENDING LOGGING AT Mon Dec 05 02:59:56 2022