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Add support for continuously writing ADC samples to a circular buffer. CONFIG_ADC_PROFILE_FAST_CONTINUOUS should be defined and an appropriate sized buffer must be passed to adc_read_all_channels(). BUG=chromium:569994 TEST=Manual on snoball. Verify 'adc' continues to function (single mode). With pending commit, verify that continuous conversion interrupt is called at appropriate frequency and values look consistent. BRANCH=None Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Change-Id: I025825d72a698f8f1f4f95a89477df791bd5e67e Reviewed-on: https://chromium-review.googlesource.com/318505 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Shawn N <shawnn@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly