UART not working in Beaglebone black

General Discussion
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1

Hello ,

I have tried to get the console of my beaglebone black via uart using a 6 pin usb to serial( PL2303HXD 6Pin USB TTL RS232) with my beaglebone powered up with 5V adapter , but am unable to get the console .

I suspected that there might be problem with my UART cable . I have checked it if it is working or not by connecting the tx and rx of it and checked the inputs given are displayed or not and it worked as well

I have checked in my board in both GPIO pins(Pin 11 and 13 , GPIO UART tx and rx) as well as in UART pins (UART tx rx and gnd) . Also checked by Vcc to the serial to usb as well . checked with all possible baudrates too , unable to get console

Can anyone help in finding out how if the problem is with the board or am I missing any configuration inorder to get UART communication ?

TIA,
Dharbanesh

PS: I have used the image from beaglebone official site and flashed it using a sd-card

2

Which version of the PL2303HXD, specifically 3v3 support?

Regards,

3

Normally, Beaglebone black use USB cable communication between PC and BBB.
You can find detail in book " Exploring Beaglebone"
For my PC it show COM3

Regards,
Richard

4

Hi @RichSj ,

I have earlier experience with Beaglebone black where it has UART which helps in stopping the console in bootloader and lets us inspect the boot logs . but USB doesn’t help for these . Is there a way to see boot logs via USB cable communication

5

I don’t know @RobertCNelson , Am using this product https://robu.in/product/pl2303hxd-6pin-usb-ttl-rs232-convert-serial-cable/

6

Hi, @Dharbanesh,

You are right, for your usage, USB can not do this.
For my understand, after release, software package bootloader outlog no inside detail information, only you got develop version, these logs may give you some information.

Regards,
Richard

7

That adaptor is 3.3V so should work.

Are you swapping tx and rx when connecting the connector ?

USB TX → BBB RX
USB RX → BBB TX
USB GND → BBB GND