Gentlemen, which ports are confirmed to be working with 4.x kernels on Lamobo R1 ?

 

I'm using Ubuntu image 5.10, with installed updates: Ubuntu 14.04.4 LTS 4.5.5-sunxi.

So far, seen only working UART3 (/dev/ttyS1) on pins 8/10 of CON3.

U-boot seen on UART0 (J13), but under Linux, don't see anything on either UART0 or UART2.

 

Anyone seen better results ?

You can activate more ports by editing Device Tree file (/boot/dtb/sun7i-a20-lamobo-r1.dtb for your device) - please check this and this threads as a reference.

The funny part that in dtb at least uart0 is enabled. but it works kind of funny way: from external to R1 data can be transferred, so RX line works, from R1 to external device, it doesn't work. TX pin seems to be working incorrectly. I checked pin mapping, PB22/PB23 seems to be ok. potentially it can conflict with IR1, but IR1 is disabled.

UART0 is probably in use by getty/serial-getty, you'll have to disable it first (In Ubuntu Trusty you'll have to edit/remove /etc/init/ttyS0.conf)

I'm sure, that there is no getty there

root@lamobor1:~# fuser /dev/ttyS0

root@lamobor1:~#