Using tree overlays

[Andy Bushnell]

Hi,

I'm looking for information on using overlays for GPIO and the UART's.  For the BBB I have used Molloy's book but things have changed from that.  I'm using C++ with cape manager.  Page 222 in exploring Beaglebone.

Thanks!

Andy

[GaryH]

I think that uboot overlays are now being used:

https://forum.digikey.com/t/all-beaglebone-varients-u-boot-overlays/26

I would also like to reassign pins, but I haven't found how to do this with uboot overlays.

Here's a link for changing pin assignments from the command line using config-pin:

https://github.com/beagleboard/pocketbeagle/wiki/Peripherals

I used config-pin to reassign I2C1 to UART1:

$  sudo config-pin P2_09 uart

$  sudo config-pin P2_11 uart

This reverts back to I2C1 on reboot.

Gary

[cyril.jo...@gmail.com]

Hi, do you know how to make the config-pin permanent ? Do we have to use U-Boot overlays for that ?

Especially I configured can0 and can1 interfaces in /etc/network/interfaces so that they would be up automatically.
So the calls of config-pin need to be done before the interfaces are setup otherwise the CAN bus doesn't work, and I would need to manually set them down and up again.

As anybody done that ?

Thanks,
Cyril