**** BEGIN LOGGING AT Wed Jan 05 02:59:56 2022 Jan 05 04:18:11 jfsimon1981: that image is showing rts being released _instantly_ after the last byte of transmission, so there's nothing left to improve there. what's up with that RTS trace btw, why does it look so bizarre? Jan 05 04:19:22 jfsimon1981: other than that there's nothing really left to add to what I've already said repeatedly Jan 05 04:19:41 is this using kernel rts? Jan 05 04:21:07 actually this looks like rts is turned off too early, slightly cutting off transmission of the last byte... I guess you're using whatever bizarre trick libmodbus is doing to try to time it Jan 05 04:22:45 and that's assuming the high period before rts is released is the stop bit, it's hard to say for sure whether it is Jan 05 07:52:31 Hi, this is with using kernel rts (uart2 with rts support). Jan 05 07:53:36 the ground line is soft and tight to rs485, not bb, hence channel 2 only sees RTS signal change, not steady state. Channel 1 and 2 ground are common on this scope. Jan 05 07:54:41 (so I cannot properly use the beagle ground for channel 2). But RTS signal whenmeasured ont BB is perfectly normal 1/0 output. Indeed it is times just right on release. Jan 05 14:04:20 jfsimon1981: normally the ground line of the rs485 is connected to the ground of the master, i,e. the bbb Jan 05 17:00:41 zmatt, ok thx Jan 05 17:01:04 via /msg NickServ IDENTIFY jfsimon1981 charly Jan 05 20:52:03 @vagrantc, ping... extlinux.conf... where's a good place to store the original before i upgrade the kernel and update the uname-r/etc... Jan 05 20:53:13 rcn-ee: not sure what you mean? Jan 05 20:53:18 rcn-ee: more context? Jan 05 20:54:09 for most of the systems i use extlinux.conf i just have u-boot-menu installed and it just regenerates the file on kernel/initrd package updates Jan 05 20:54:34 it might make an extlinux.conf~ backup ... don't quite recall Jan 05 20:55:09 you can copy it to anywhere and then manually tweak your u-boot environment rules if you need to switch to the old copy for some reason Jan 05 20:56:43 vagrantc, so i'm working on a generic extlinux.conf support, i need to update the root=() for eMMC vs microSD... i'm wondering if would best to store an original somwhere in the filesystem, that users can tweak. (template) or blow it away on every upgrade... Jan 05 20:57:43 my "/etc/bbb.io/templates/" is becoming a garbage location... thinking that extlinux.conf might have a default "template" location.. Jan 05 20:58:34 it's also tied to the bootloader, so my u-boot builds might update the template... Jan 05 20:58:47 (For the specific device) would update it's version.. Jan 05 21:11:53 that's more adventurous than i typically get, not sure of any conventions there Jan 05 21:33:27 jfsimon1981: lol, time to change your nickserv password ;) Jan 05 21:35:07 jfsimon1981: it's better to configure your irc client to use sasl authentication, then you'll be identified to nickserv immediately when connecting to the irc server: https://libera.chat/guides/hexchat Jan 05 21:35:45 (guides for other irc clients: https://libera.chat/guides/sasl ) Jan 05 22:19:19 thanks Jan 05 22:19:28 well i changed it Jan 05 22:20:08 hexchat on linux Jan 05 22:21:05 yeah I know that's why I linked to the guide for hexchat Jan 06 01:33:40 ok, good to know... if hdmi is enabled on the bbb (which is the factory default) but no hdmi is attached then the lcdc pins remain in lcdc's reset state, which is: P8.27 driven high, P8.28-30 driven low, P8.31-46 high-impedance **** ENDING LOGGING AT Thu Jan 06 02:59:57 2022