Hello Fabio,

On Thu, Dec 12, 2019 at 2:35 PM Fabio Estevam <festevam@gmail.com> wrote:
> > Yes, we connect it to a PC and basically stream data in both directions between the two.
>
> Looks like I need to access the UART2 pins in the wandboard and place
> a RS-232/USB converter.
>
> Not sure I can easily do such setup at the moment.

I have found one other issue relating to this crash - it seems to only
occur when we're in a bus-conflict situation. I.E: both parties on the
RS485 bus are transmitting at the same time. On the scope I am able to
see invalid bytes due to this contention.

In the attached screenshot you can see that there are odd bit patterns
visible on the RX line. Unfortunately I only have a digital trace of
it at the moment. This is a screenshot of the last block of bytes
transmitted by the IMX6 before the crash. Line 0 is the TX_EN signal
for the RS485 transceiver, line 1 is the TX signal from the MX6, and
line 2 is the RX signal. These are both on the MX6 side of the
transceiver.

Regards,
Andre