gpio problem (bbxm with ubuntu)

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1

hello

I am trying to use the gpio of bbxm.

I follow the step of this link:
http://elinux.org/BeagleBoardUbuntu#BeagleBoard_xM

using the prebuilt image.

I can boot the board successfully.
However, I encounter a problem that even i try to set the gpio pin 139 to “low” it still output 1.8V.
But I can successfully control it with Angsrom system.(With the same command.)

Is there any one can help me?Thanks!

2

You can't really compare the ancient Angstrom (board file) kernel with
this..

Regards,

3

Hi Robert Nelson,
How I can update the *.dtb?
That’s exactly problem of my beagleboard with Ubuntu OS
Thanks

4

Hi,

it’s been a lot of time, but, you fixed your problem? how you updated the *.dtb? thanks