altos: Add STM DMA debugging
authorKeith Packard <keithp@keithp.com>
Tue, 28 Jun 2016 00:26:19 +0000 (17:26 -0700)
committerKeith Packard <keithp@keithp.com>
Thu, 30 Jun 2016 02:17:45 +0000 (19:17 -0700)
This provides a command that shows current DMA operations when
compiled with -DDEBUG=1. Without that, this patch has no effect.

Signed-off-by: Keith Packard <keithp@keithp.com>

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