[Buildroot] [RPi 3B] ttyAMA0 serial port device doesn't exist on raspberry pi 3B

Oscar Gomez Fuente oscargomezf at gmail.com
Thu Apr 21 14:58:08 UTC 2016


Thank you Peter,

Only you have to add this line in the config.txt file:

device_tree=bcm2710-rpi-3-b.dtb
+dtoverlay=pi3-disable-bt

And copy the file pi3-disable-bt-overlay.dtb to /boot/overlays folder.

This disabled the Bluetooth module.

Best regards.

Oscar Gomez Fuente

On 19 April 2016 at 22:41, Peter Korsgaard <peter at korsgaard.com> wrote:

> >>>>> "Oscar" == Oscar Gomez Fuente <oscargomezf at gmail.com> writes:
>
>  > Hi everyone,
>  > I'm using buildroot-2016.02 and I'm trying to make a rootfs for the
>  > raspberry pi 3B. I've just used the raspberrypi2_defconfig. And
> everything
>  > works fine except the serial port /dev/ttyAMA0.... I can see characters
> on
>  > the serial port but they are garbage characters...
>
>  > This is my config.txt, I'm using the bcm2710-rpi-3-b.dtb file:
>
> I believe ttyAMA0 is connected to the bluetooth module on rpi3 and you
> instead
> need to use ttyS0:
>
> https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=138120
>
> --
> Bye, Peter Korsgaard
>
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