**** BEGIN LOGGING AT Sat May 04 02:59:57 2019 **** ENDING LOGGING AT Sat May 04 03:52:26 2019 **** BEGIN LOGGING AT Sat May 04 12:22:11 2019 May 04 12:34:25 CoffeeBreakfast: I mean, there is a slack with a gateway to this irc channel. feel free to use it as long as you don't bother people with things that don't work via the irc gateway :P May 04 15:21:55 zmatt: what things doesn't work via the irc gateway? May 04 15:23:11 attachments, edits, emoji, threading, … – basically just use plain chat and you're fine. May 04 15:36:48 hello all May 04 15:37:52 i am apparently running a bbb with a sd card with debian 9.5 (lxqt). it's connected to my lan via ethernet so i can get the ip address. May 04 15:38:11 browsing to the bbb from my browser on another machine works May 04 15:38:24 but i can't get terminal access over ssh to work May 04 15:39:01 i've tried `ssh -l root ip_address` and [enter] for the pw, but it doesn't work (this is what i figured from the wiki) May 04 15:39:03 any ideas? May 04 15:39:20 please May 04 15:39:32 does it work with 'ssh ip_address' May 04 15:39:47 or ssh debian@ip_address May 04 15:41:24 artag: will try now May 04 15:42:14 artag: no May 04 15:42:32 not at all, or refuses the login ? May 04 15:42:37 refuses the login May 04 15:42:51 so it looks like there is sshd running May 04 15:42:59 yeah. what passwd did you give May 04 15:43:14 it should be temppwd for debian May 04 15:44:37 unless you've somehow turned off password logins, in which case you'd need the ssh key May 04 15:45:01 artag: nowhere in the wikis did it mention temppwd. i'll try now. May 04 15:45:56 no, didn't work either May 04 15:46:09 can you re-image the sd card ? May 04 15:46:25 seems like the best use of time right now, eh :D May 04 15:46:33 i think so :) May 04 15:46:45 unless you have stuff on it you need May 04 15:47:33 https://beagleboard.org/getting-started#troubleshooting May 04 15:47:46 tempwd is mentioned on there. it's not especially obvious May 04 15:48:12 temppwd rather May 04 15:51:01 the getting-startd page is the first google hit I get for "beaglebone password" May 04 15:51:32 the second hit is this wiki page: https://elinux.org/BeagleBoardDebian where the correct username and password are also listed (first hit when searching for "password" on that page) May 04 15:52:00 ullbeking: so I wonder where you've been looking if you say "nowhere in the wikis did it mention temppwd" May 04 15:52:23 ullbeking: btw, for most uses you probably want the iot image rather than the lxqt image May 04 15:52:30 zmatt: brb May 04 15:53:30 zmatt: the first thing that the instructions that come with this thing tell me to do is to go to https://beagleboard.org/getting-started and follow the instructions there May 04 15:53:45 which contains this login information too May 04 15:53:52 so i do, download the image, flash it, boot the bbb, etc May 04 15:54:42 I'll admit it could have listed that information a bit more conspicuously May 04 15:54:47 you're right May 04 15:54:52 i'll find the incorrect page May 04 15:55:10 though there are only two hits for "password" on that page, and one is for the wifi access point, so *shrug* May 04 15:55:20 if you're looking for a password, it should be easy to find May 04 15:56:33 https://elinux.org/Beagleboard:Terminal_Shells this page tells me the username is root and the password is empty string May 04 15:57:06 maybe a nice GSoC project... "find outdated sources of beaglebone info on the web, try to fix it (if wiki) or contact the author (otherwise) to get them to at least mark it as outdated" ;) May 04 15:57:33 I've never seen that page in my life May 04 15:57:47 but given that it mentions Angstrom being the default distro, it's probably very very old May 04 15:58:02 november 2013 May 04 15:58:44 well, i searched for ssh access and there i ended up ;-) May 04 15:58:50 anyway, thx for setting me straight May 04 15:59:25 in all this fiddling, is there any way i might have accidentally corrupted the emmc? May 04 16:00:13 pretty unlikely if you booted off the sd and never logged on. but maybe if you did a lot of power offs. May 04 16:00:28 worse case, just reflash it May 04 16:00:31 *worst May 04 16:00:42 but emmc contents doesn't corrupt *that* easily May 04 16:02:05 zmatt: it's a pity that login info is under 'troubleshooting'. should be a section on ssh login rather than being all web stuff imho. But that's just me. May 04 16:03:25 i'm proud of my neckbeard :) May 04 16:03:25 my mind boggles as to how somebody with no experience with this sort of stuff would figure it out from afresh May 04 16:03:35 artag: congrats! May 04 16:04:37 i get the impression it's now aimed strongly at the millenial that wants to find a web page and get thrown into an ide. Which is fine as far as it goes, but imho that isn't very far. May 04 16:05:51 fortunately there's some extremely good expertise in this channel (and I don't mean me) for the hardcore types May 04 16:20:42 o/ May 04 17:53:04 artag: are you talking about the expectations of new developers to the development workflow? what you describe sounds terrible. May 04 17:54:41 depends what you call developers. Yes, but I think the web stuff is more aimed at the people lookinhg beyond arduino rather than traditional unix May 04 17:55:45 tbh we've got a lot going for us by understanding what's going on inside, but something things are a bit buried May 04 17:57:22 i don't agree with dumbing down but i do appreciate that it's worth picking up those purchasers. however, I think raspberry pi are easier to find your way around - perhaps becaue there's just so much more literature May 04 18:01:02 i think beaglebone used to be much more aimed at the knowledgable user (the original bb predates the pi, doesn't it ?) but recently there's been a huge effort to make it user-friendly and the more techy appoach has suffered a little May 04 18:03:09 this wouldn't matter, but some of the changes to make it easy to start have also affected the underpinnings, so the old docs are outdated May 04 18:04:20 is that reasonable zmatt or am i being unfair ? I might have just failed to find newer resources, or perhaps google is giving me old rather than new ones May 04 18:29:14 can I use the beaglebone to measure a clock ? May 04 18:29:19 frequency and jitter May 04 18:29:30 eg with a hardware timer May 04 19:03:23 mawk: plenty of options. eQEP would be especially suited for frequency, but I'd suggest eCAP if you need to measure each individual period (for determining jitter) May 04 19:04:10 what sort of frequency are we talking about? (order of magnitude) May 04 19:05:02 artag: dunno, it always had the fluffy web stuff afaik May 04 19:05:29 100 MHz May 04 19:05:58 mawk: nothing on the beaglebone is going to measure that, let alone provide jitter information May 04 19:06:04 :( May 04 19:06:24 so there's no hardware timer peripheral May 04 19:06:30 of course there is May 04 19:06:38 plenty of them May 04 19:06:52 but not with a fucking gigahertz clock or something crazy like that :P May 04 19:07:18 ah, I thought they had the GHz clock May 04 19:07:51 the fastest have a 100 MHz clock May 04 19:15:15 you could use the display pll to generate a clock, make an external circuit to measure phase difference and use that as feedback to adjust the display pll in software and have it track the externally provided clock :P May 04 19:15:37 (assuming the display pll isn't needed for video output :P ) May 04 19:22:17 if the phase detection consists of measuring low-pass filtered versions of (A & ~B) and (~A & B) then you even get some jitter information :P May 04 19:22:18 yeah May 04 19:22:51 (establishing initial frequency lock is left as exercise for the reader) May 04 19:23:06 lol May 04 19:23:29 the goal is to measure if the internal oscillator of my cortex M board drifts when you use it outside the standard specs May 04 19:23:51 measure a divided clock instead? May 04 19:24:15 hmm yes May 04 19:24:28 I can feed the clock signal to a hardware timer to divide it May 04 19:24:30 that can at least give you frequency-information May 04 19:25:38 yeah May 04 19:28:13 the software pll thing could be used as optional add-on to check if the clock is clean enough May 04 19:33:12 is the tapr TICC any good to you ? that was built by time-nuts wanting to measure jitter and Adev cheaply May 04 19:33:55 Adev ? May 04 19:34:21 someone also rebuilt an old hp time analyser around a beaglebone but it still used the hp acquisition hardware May 04 19:34:48 allen deviation. it's a measure of frequency repatability May 04 19:35:18 ah good May 04 19:36:11 they tend not to like dividing an input down though, as it averages the jitter over multiple periods May 04 19:37:22 http://www.leapsecond.com/pages/adev-avg/ May 04 19:37:26 yeah of course May 04 19:37:49 treasure trove of frequency measurement stuff there May 04 19:38:01 I have a 400MHz cortex M7 board, with probably 400MHz timers May 04 19:38:05 I could try to use that May 04 19:38:09 I can overclock it probably May 04 19:40:17 the TICC uses a I device intended for measuring laser time-of-flight. 60ps resolution May 04 19:40:33 *TI device* May 04 19:40:57 nice May 04 19:41:02 I always wondered how that was done May 04 19:41:09 since light tends to go pretty fast May 04 19:42:03 yeah, i don't think it's the only way. some work by a kind of moire effect comparing outgoing with reflected May 04 20:33:07 cool device (the tdc7200) **** ENDING LOGGING AT Sun May 05 03:00:37 2019