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* stm32-USART: Add generic stream based usart driverAnton Staaf2014-09-231-0/+117
This driver can be used to access multiple usarts using an abstract stream interface. The stream interface can also be used in drivers for the host interface and USB console interface, providing a consistent API across all character stream style IO. Signed-off-by: Anton Staaf <robotboy@chromium.org> BRANCH=None BUG=None TEST=make buildall -j Change-Id: Icf567f0b0fa4eb0e9ad4cdb0be8edc31c937a7de Reviewed-on: https://chromium-review.googlesource.com/209671 Reviewed-by: Randall Spangler <rspangler@chromium.org> Tested-by: Anton Staaf <robotboy@chromium.org> Commit-Queue: Anton Staaf <robotboy@chromium.org>