[U-Boot] [RFC PATCH 1/2] serial_mxc: return question mark for chars received with high bit set

[Eric Nelson]

Hi all,

On 05/14/2014 11:04 AM, Eric Nelson wrote:
> This patch allows testing of patch 2/2 in the series by forcing
> bytes read from the i.MX serial port to be printable.
>
> Without this, it's very hard to tell that a series of in-bound
> '\xff' characters are being produced, because they'll be
> silently ignored.
>

An even easier test is to use stty at a Linux shell:

      # stty -F /dev/ttymxc1 19200

And then enter a 'b' at 115200.