altos/stmf0: Add ADC and DMA APIs
authorKeith Packard <keithp@keithp.com>
Tue, 27 Jan 2015 06:14:57 +0000 (22:14 -0800)
committerKeith Packard <keithp@keithp.com>
Tue, 27 Jan 2015 06:14:57 +0000 (22:14 -0800)
The ADC api is what USBtrng wants; a way to repeatedly read a single
ADC input as fast as possible.

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

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