Can i have both UART and USB as console on my BBB/Debian 9?

General Discussion
1

I can use USB-COM to access my BBB (Debian 10) console. How can I also enable UART0 on the header to act like a console?

2

The FTDI header on J1 is enabled by default as uart0 console…

https://elinux.org/Beagleboard:BeagleBone_Black_Serial

Regards,

3

Thanks! I thought the UART was exposed in the headers :joy:

4

a few more uarts are available on the two headers… The console isn’t enabled by default thru them, you can enable them…

Regards,

5

Any pointer to enable console thru them?

6

Simple, you’ll need to update the boot args:

console=ttyS0,115200n8

to which uart you want to use…

Then make sure you enable teh overlay for the usart you want…

Regards,

7

I am a newbie to debian.

I looked into /boot/, /dev, and /bin, but didn’t find anything that has the line “console=ttyS0,115200n8”, could you be so kind to give me a pointer, thanks!

regarding “enable the overlay”, do you mean the below section in \boot\uEnv.txt ?

###Master Enable
enable_uboot_overlays=1
uboot_overlay_addr0=/lib/firmware/BB-UART1-00A0.dtbo
uboot_overlay_addr1=/lib/firmware/BB-UART4-00A0.dtbo

8

So you might be able to force that in /boot/uEnv.txt much newer versions of u-boot i had exported that variable…

looks good…

Regards,