[riot-users] RIOT and UDOO: UART drivers for internal shared bus

Hauke Petersen hauke.petersen at fu-berlin.de
Thu Oct 30 12:58:57 CET 2014

Hi Francesco,

the UART driver for the UDOO board is almost ready, I actually hope it 
will be merged today. The driver then enables you to access the SAM's 
UART in a efficient way. For documentation best have a look at the 
doxygen for `RIOT/drivers/include/periph/uart.h`.

Now for communicating between both MCUs, you would need to look into the 
UDOO's documentation, namely the UDOO Starting Manual chapter 3: 
'internal connections'. There you can see, that the SAM is connected via 
it's primary URXD and UTXD with the iMX. This UART is mapped in RIOT to 
UART_0. So for sending and receiving on the SAM side, you just need to 
use RIOT's UART interface with UART_0. On the iMX side, I can't really 
help you, just look it up in UDOO's documentation.

I hope this is of any help to you, if you need additional information 
let me know!


On 29.10.2014 21:26, Francesco Ermini wrote:
> We have RIOT runs on UDOO board.
> Our aims is to establish a communication trough the internal shared 
> bus between the two processors, the imx6 and the sam3x using UART 
> protocol,as describe in the UDOO starting manual ( par 3.2.2 ).
> I saw  @Hauke Petersen did the UART drivers for UDOO,but I couldn't 
> find any reference for the internal serial UART that allows the 
> communication with the iMX6.
> Is this already included? or shell we have to define a new UART port?
> Thanks, Francesco
> Francesco Ermini
> electronic engineering Student
> at UNIFI
> _______________________________________________
> users mailing list
> users at riot-os.org
> http://lists.riot-os.org/mailman/listinfo/users

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