**** BEGIN LOGGING AT Tue Sep 20 02:59:56 2022
Sep 20 12:51:16 <Guest4781> Hello guys, I am interested in Beaglebone64 AI board. I did some research on TI's website. There are some examples about using the Accelerators. Will I be able to follow the instructions there and replicate it on Beaglebone AI. Alternatively are there any examples from beaglebone community?
Sep 20 13:05:45 <Guest4781> Seems like no one is here
Sep 20 16:55:32 <xshifty> hello guys. Anyone here using beaglebone AI-64 for robotics?
Sep 20 18:01:52 <jfsimon1981> Good evening
Sep 20 18:02:12 <jfsimon1981> zmatt I'll be working on the safe emmc (slc and safe write flag
Sep 20 18:02:37 <jfsimon1981> do i need to recompile the kernel ?
Sep 20 18:04:50 <zmatt> no
Sep 20 18:05:06 <zmatt> the kernel has nothing to do with it
Sep 20 18:05:16 <zmatt> it's purely an eMMC-internal setting
Sep 20 18:05:33 <jfsimon1981> i shall just format, but there's emmc utils to recompile then
Sep 20 18:06:48 <jfsimon1981> the one which supports safe write, if i get it right that's not possible with default emmc, there's one on your git which support sit
Sep 20 18:07:30 <jfsimon1981> Boot for microsd and reformat emmc with this flag on, is it correct ?
Sep 20 18:10:14 <zmatt> jfsimon1981: iirc it's possible to use standard mmc-utils to do the reconfiguration, but the process then requires multiple steps, some of which depend on parameters you need to query, and is tricky and error-prone.  since "one-time-programmable irreversible configuration" and "error-prone" are not a good combination, I created a added a custom command to mmc-utils
Sep 20 18:11:00 <jfsimon1981> ok
Sep 20 18:11:26 <jfsimon1981> Do you think one time programmabe means only at format time ? or one for entire emmc life ?
Sep 20 18:11:37 <zmatt> for the entire eMMC life
Sep 20 18:11:51 <zmatt> there is no way to undo this
Sep 20 18:12:05 <jfsimon1981> oh so basically at factory they don't do it, it can be done but not way back
Sep 20 18:12:43 <jfsimon1981> ok, did you check this with manufacturer of that's just clear to you the way datasheet says it ?
Sep 20 18:13:07 <zmatt> it's how the eMMC specification is written
Sep 20 18:13:11 <jfsimon1981> ok
Sep 20 18:14:07 <zmatt> anyway, boot from sd card, and then "mmc reliable-slc-configuration /dev/mmcblk1" (where mmc is the util built from my repo)
Sep 20 18:14:20 <zmatt> and then power-cycle the beaglebone (reboot does not suffice)
Sep 20 18:14:28 <jfsimon1981> ok pretty clear
Sep 20 18:15:01 <jfsimon1981> this is  the mmc which i shall compile from your git source then right ?
Sep 20 18:15:17 <zmatt> that's what I just said: "where mmc is the util built from my repo"
Sep 20 18:15:39 <jfsimon1981> yes
Sep 20 18:15:42 <jfsimon1981> i'm sorry got it
Sep 20 18:16:00 <jfsimon1981> it will help me sleep at night
Sep 20 18:16:03 <zmatt> and just to be clear, this reconfiguration into SLC mode causes 50% reduction in storage space
Sep 20 18:16:15 <jfsimon1981> we are at serial number 7 but that's gonna grow
Sep 20 18:16:28 <jfsimon1981> yes sure
Sep 20 18:17:57 <jfsimon1981> i'll try for next batch
Sep 20 18:17:58 <jfsimon1981> thank you
Sep 20 20:43:37 <hays> anyone in here know crosstool-ng pretty well?
Sep 20 20:43:49 <hays> I have an offtopic question
Sep 20 20:45:47 <zmatt> I've used it a few ages ago, wouldn't say I know it well though
Sep 20 20:46:16 <hays> i think im missing a basic logical question about it.. trying to build a toolchain for a machine that currently doesnt have one
Sep 20 20:46:45 <hays> its the same arch, but differeent glibc and everything else.  so I think I need to do a "cross-native" build
Sep 20 20:47:19 <hays> build once a cross, then build again, using the cross to make the native
Sep 20 20:47:31 <hays> for the life of me I can't understand how to use crosstools-ng to do this
Sep 20 20:48:11 <zmatt> oh I've only ever used it for building cross-toolchains, not for cross-building a native toolchain
Sep 20 20:48:22 <hays> yeah i think that's simpler
Sep 20 20:53:09 <hays> its maddening i understand conceptually but can't make sense of the tool
Sep 20 20:55:28 <zmatt> I mean, clearly it supports doing it: https://crosstool-ng.github.io/docs/toolchain-types/
Sep 20 20:56:41 <zmatt> I guess just examine one of the canadian-cross examples?
Sep 20 21:07:43 <hays> there seems to be a variable CT_HOST that needs setting
Sep 20 21:07:59 <hays> just like with the kernel, its always tricky to find that in the menu
Sep 20 21:09:04 <jfsimon1981> zmatt
Sep 20 21:09:14 <jfsimon1981> ok i'm /msg NickServ IDENTIFY jfsimon1981 charly00
Sep 20 21:09:25 <zmatt> hays: looking at samples/x86_64-w64-mingw32,arm-cortexa9_neon-linux-gnueabihf/crosstool.config ... it seems pretty simple?
Sep 20 21:09:30 <jfsimon1981> I'm building it
Sep 20 21:09:45 <zmatt> jfsimon1981: and apparently you're also changing your nickserv password :P
Sep 20 21:10:04 <jfsimon1981> One thing i have to pass through disabling the Werror flag, won't get through otherwise
Sep 20 21:10:07 <jfsimon1981> In file included from /usr/include/string.h:494,
Sep 20 21:10:07 <jfsimon1981>                  from lsmmc.c:46:
Sep 20 21:10:07 <jfsimon1981> In function ‘strncpy’,
Sep 20 21:10:07 <jfsimon1981>     inlined from ‘read_file’ at lsmmc.c:356:3:
Sep 20 21:10:08 <jfsimon1981> ncpy’ accessing 4096 bytes at offsets 0 and 1 overlaps 4095 bytes at offset 1 [-Wrestric
Sep 20 21:10:10 <jfsimon1981> t]
Sep 20 21:10:12 <jfsimon1981>    return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
Sep 20 21:10:14 <jfsimon1981>           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Sep 20 21:10:29 <zmatt> jfsimon1981: don't paste multi-line stuff into chat, use a paste service like pastebin
Sep 20 21:10:35 <jfsimon1981> Appart from that seems good
Sep 20 21:11:07 <jfsimon1981> Yes that's one error in lsmmc.c
Sep 20 21:11:17 <zmatt> jfsimon1981: btw, consider enabling sasl in your irc client: https://libera.chat/guides/sasl
Sep 20 21:11:45 <jfsimon1981> yes
Sep 20 21:12:11 <jfsimon1981> that gets rid of the identify you mean
Sep 20 21:12:33 <jfsimon1981> Will try the mmc command now
Sep 20 21:14:21 <zmatt> I guess I should probably rebase my patches on top of the latest upstream version of mmc-utils... I might do that later, right now I've got something more important to do: eat pizza
Sep 20 21:16:23 <jfsimon1981> Seemt to be done
Sep 20 21:16:54 <jfsimon1981> setting OTP PARTITION_SETTING_COMPLETED!
Sep 20 21:17:04 <jfsimon1981> All right
Sep 20 21:17:21 <jfsimon1981> Power cycle & check it
Sep 20 21:22:00 <hays> zmatt: simple? heh  I think maybe I just need to figure out how to set CT_HOST
Sep 20 21:22:20 <hays> but we shall see
Sep 20 21:22:50 <zmatt> what do you mean? it's just a config var like any other
Sep 20 21:22:55 <zmatt> don't forget to also enable CT_CANADIAN=y
Sep 20 21:23:24 <zmatt> (since it views cross-native as a special case of a canadian cross)
Sep 20 21:23:31 <hays> right
Sep 20 21:23:42 <hays> then i guess i can go into menuconfig and make additional tweaks
Sep 20 21:24:44 <jfsimon1981> matt, after the emmc process i should format to make it work ?
Sep 20 21:24:45 <zmatt> CANADIAN should also be somewhere in menuconfig
Sep 20 21:24:52 <hays> that one is easy to find
Sep 20 21:24:58 <hays> CT_HOST is not obvious
Sep 20 21:25:03 <hays> at least to me
Sep 20 21:25:24 <hays> right now (re)building the first step
Sep 20 21:25:25 <jfsimon1981> like partition and format right ?
Sep 20 21:25:42 <zmatt> jfsimon1981: after doing the otp config and power-cycling, the eMMC will be completely wiped
Sep 20 21:25:59 <jfsimon1981> ok
Sep 20 21:26:39 <zmatt> so yeah, you'll need to create a partition, e.g.:   echo 'start=8192,bootable' | sfdisk /dev/mmcblk1
Sep 20 21:27:00 <zmatt> or, well, that's part of the typical process of flashing
Sep 20 21:27:11 <jfsimon1981> thank you
Sep 20 21:27:19 <zmatt> like, after doing this you just reflash the eMMC as usual
Sep 20 21:27:30 <jfsimon1981> right
Sep 20 21:29:57 <zmatt> hays: HOST should appear in the toolchain config menu after you enable CANADIAN
Sep 20 21:30:32 <jfsimon1981> Now we can't use the 4G flash image
Sep 20 21:30:44 <zmatt> hays: https://github.com/crosstool-ng/crosstool-ng/blob/master/config/toolchain.in#L271-L280
Sep 20 21:31:19 <hays> ohh host tuple
Sep 20 21:34:25 <jfsimon1981> Worked i got only 1.8 GiB
Sep 20 21:34:39 <hays> i guess that means i really know what im doing.. if im filling that out haha
Sep 20 21:36:43 <hays> [00:00] / Invalid configuration `': machine `-unknown' not recognized
Sep 20 21:38:07 <hays> fixed.
Sep 20 21:38:10 <hays> alright here we go
Sep 20 22:14:59 <hays> well my stupidity is costing me be the hour.. heh but luckily only like $0.15/hr
Sep 20 22:15:17 <hays> i wonder how big you can get an instance and it still benefits a gcc build
Sep 20 23:05:56 <jfsimon1981> Hi zmatt
Sep 20 23:06:14 <jfsimon1981> I'll probably need a bit of help to flash it, though tomorrow
Sep 20 23:06:48 <jfsimon1981> Now that it's 2 Gb i can do with the 7.5 (2014) image that's 2GB but it's a bit old.
Sep 21 00:22:10 <zmatt> jfsimon1981: start with a minimal image, not with an ancient image
Sep 21 00:25:36 <zmatt> given that you knew from the start that this reconfiguration would leave only half the eMMC size, I'm a bit confused you're only now considering what to flash onto it instead of *first* making sure that 2G is plenty of space for your use case
Sep 21 00:26:15 <zmatt> I also feel like we've surely discussed this at a previous occasion
**** ENDING LOGGING AT Wed Sep 21 02:59:57 2022