From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Nelson <eric.nelson@boundarydevices.com>
Date: Wed, 14 May 2014 11:45:24 -0700
Subject: [U-Boot] [RFC PATCH 1/2] serial_mxc: return question mark for
 chars received with high bit set
In-Reply-To: <1400090674-10586-2-git-send-email-eric.nelson@boundarydevices.com>
References: <1400090674-10586-1-git-send-email-eric.nelson@boundarydevices.com>
	<1400090674-10586-2-git-send-email-eric.nelson@boundarydevices.com>
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To: u-boot@lists.denx.de

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.