Re: HELP : pocketbeagle UART issue using node js

[Dennis Lee Bieber]

On Wed, 24 Feb 2021 06:33:30 -0800 (PST), in
gmane.comp.hardware.beagleboard.user Piyush Raj ae19m009
<ae19m009-p/GD3RyrBS6E...@public.gmane.org> wrote:

>
>what is it that i need to do differently in pocketbeagle. This same code
>works for my pocket beagle. i have also ensured that my ttyO4 is enabled.
>

Please clarify "pocketbeagle" vs "pocket beagle"? I suspect you mean
one of the beaglebone black series...

>My code is as below. any help would be highly appreciable. Thanks
>

A Google search reports a BBB showing the same message -- on
StackOverflow, three years ago -- with no answers.

No confirmed answers here either
https://groups.google.com/g/beagleboard/c/kBfn3JW2Kao
though I would suggest verifying the /boot/uEnv.txt files on the two
systems you mention, along with checking kernel version, bonescript and
node.js versions.

The message itself appears to be produced at line 462 of
https://github.com/jadonk/bonescript/blob/master/src/my.js but as I don't
"do" node.js I can't really follow that logic.


--
Dennis L Bieber

[Piyush Raj ae19m009]

I tried suppressing the error produced by line 462 by bruteforce (putting is_capemgr as True). and got rid of this error. 

however, got stuck with the error in  468 (Device Tree overlay fragment BB-UART4 not loaded). 

which means that load_dt fails to fetch the port. i am trying to find out location of load_dt function. hopeful to solve this issue with community help. thanks

[evilwulfie]

what version of the OS are you using?

you can load the overlay for that com port in Uenv.txt

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[Piyush Raj ae19m009]

sorry for my ignorance, but i am quite new to LINUX platform. can you elaborate on how to add overlay for that com port(ttyO4).

[Robert Nelson]

On Wed, Feb 24, 2021 at 11:08 AM Piyush Raj ae19m009
<ae19...@smail.iitm.ac.in> wrote:
>
> I tried suppressing the error produced by line 462 by bruteforce (putting is_capemgr as True). and got rid of this error.
> however, got stuck with the error in 468 (Device Tree overlay fragment BB-UART4 not loaded).
> which means that load_dt fails to fetch the port. i am trying to find out location of load_dt function. hopeful to solve this issue with community help. thanks

load_dt is a relic from kernel overlays.. Just make sure you loaded
the BB-UART4 u-boot overlays and nuke your "var b =
require('bonescript');" as it's not supported/needed/required
anymore..

Regards,

--
Robert Nelson
https://rcn-ee.com/

[Piyush Raj ae19m009]

@ Robert

I am not a linux person. can you elaborate on how to load BB-UART4 u-boot overlay in slightly simpler words if possible.

[Piyush Raj ae19m009]

Hi Robert

i did this for adding u-boot overlay.

uboot_overlay_addr4=/lib/firmware/BB-UART4-00A0.dtbo 

you said that i can get rid of require('bonescript').  what is the alternate method in that case

Help is deeply appreciated

regards