UEXT UART

[ThijsVP]

I want to use the UART on my LIME-2 UEXT interface.
Can anybody tell me which uart to use (on iMX233 it is ttySP1, but this is not available on the LIME-2)

[Gerrit]

the LIME2 does not have a UEXT interface, so don't know which uart you want to use but the names used ttyS0 ttyS1 and so on depending on how many uarts are configured in the fex file,see the output from

Code Select Expand

dmesg |grep ttyS

[ThijsVP]

I have an A20-OLinuXino-LIME2-UEXT board.
in the product description it says:

If the A20-OLinuXino-LIME2-UEXT gets attached to GPIO1 connector it will also provide UEXT functionality. If it is attached to the other compatible connectors it would behave as a simple adapter.

on: dmesg |grep ttyS, I guess that UART4 is also enabled (ttyS1).

would that be available on one of the gpio connectors?
I need a serial interface for my application.

    thanks in advance

[Gerrit]

UART4 is on GPIO-1 TX = pin 25 RX = pin 27 if you connect the UEXT board to GPIO-1 you can also find them back at the UEXT connector TX = pin 3 RX= pin 4

This information is in the PDF

https://www.olimex.com/Products/OLinuXino/A20/A20-OLinuXino-LIME2-UEXT/resources/A20-OLinuXino-Lime2-UEXT_sch.pdf

[ThijsVP]

Hello Gerrit,

Thank you, this is working now!