bbai ... now on Amazon

gomer · August 22, 2022, 4:06pm

noticed today that amazon has the BBAI for $112 with free shipping … only one dismal review that throws shade at even bash working and basic toolchain development.

Any rebuttals?

RobertCNelson · August 22, 2022, 4:19pm

AM57xx on the BBAI is a different beast then the AM335x on the BBB…

While gpiox_y will never match up…

Trying to unify things with:

https://elinux.org/Beagleboard:BeagleBone_cape_interface_spec

Regards,

gomer · August 22, 2022, 4:58pm

it doesn’t surprise me that AM57xx is NOT plug compatible with AM335x…

The basics of linux is what surprised me… The latest image that you’ve posted is > 2yrs old… nothing wrong with that, if it indicates stability… I still use 2018 image on my BBB’s.

is there anything to the reviews claims that the (gcc) toolchain doesn’t work, or has to be built from source?

it nags at me that there is so little chatter on these forums (good or bad) about the BBAI

thanks for response earlier

RobertCNelson · August 22, 2022, 5:11pm

updated once a month… https://forum.beagleboard.org/tags/c/general/8/latest-images

Since that user never asked here or irc, i sadly have no idea what they are talking about…

Regards,

gomer · August 24, 2022, 3:03pm

Robert :

this link is excellent … much of what I was looking for, thank you.

been studying the code for /usr/bin/config-pin… do we know who wrote this (unattributed)???
has anyone attempted to update it with the BBAI pin mux info?

I remember /usr/bin/config-pin being the tool that freed me from device tree nightmares… would be nice if we could acknowledge the author.

gomer

RobertCNelson · August 24, 2022, 3:14pm

Our current git of config-pin can be found here…

github.com

beagleboard/bb.org-overlays/blob/master/tools/pmunts_muntsos/config-pin.c

// BeagleBone GPIO Pin Configurator
// Compatible with the config-pin script available elsewhere

// Copyright (C)2018, Philip Munts, President, Munts AM Corp.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

This file has been truncated. show original

this c file was converted from a hardcoded bash script, to something that looks up pin information from sys.

am57xx has a nasty io bug inside the SOC, so i’ve not personally worked on config-pin for am57xx, it’s highly recommended to do any i/o changes in u-boot via the base device tree or an overlay…

Regards,

gomer · October 2, 2022, 9:05am

is this bug documented here? Issues · beagleboard/beaglebone-ai · GitHub

thanks.

RobertCNelson · October 2, 2022, 5:31pm

i869 - IO Glitches Can Occur When Changing IO Settings

Regards,

gomer · October 6, 2022, 12:22am

thank you
SPRUHZ6L – October 2014 – Revised August 2019
18.4.6.1.7 Isolation Requirements
might be better reference, just saying

gomer

zmatt · October 21, 2022, 9:50pm

Using config-pin is no better or worse than configuring pinmux in the base DT or an overlay. The only way to avoid i869 is by building a custom u-boot containing one’s desired pinmux.