HELP : pocketbeagle UART issue using node js

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1

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
bonescript/src/my.js at master · jadonk/bonescript · GitHub but as I don't
"do" node.js I can't really follow that logic.

2

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

3

what version of the OS are you using?

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

4

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,

5

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).

6

@ 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.

7

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