OpenCellular

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Files

Anton Staaf 69bd4ce351 USART: Add DMA based receiver

This DMA receiver uses a separate small circular buffer to DMA into.
This allows the DMA transaction to be made circular, and thus it does
not require the interrupt latency to be low enough to setup the next
transfer before the next character comes in.

Additional diagnostics output have been added to the usart_info console
command to facilitate tuning of the FIFO size.

Signed-off-by: Anton Staaf <robotboy@chromium.org>

BRANCH=None
BUG=None
TEST=make buildall -j
     Verify DMA works by cross connecting two discovery boards

Change-Id: Idcdf95a47fadf21ec2154f0c9128cd3586e568ec
Reviewed-on: https://chromium-review.googlesource.com/292870
Tested-by: Anton Staaf <robotboy@chromium.org>
Reviewed-by: Anton Staaf <robotboy@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>
Trybot-Ready: Anton Staaf <robotboy@chromium.org>

2015-08-24 19:08:35 +00:00

board.c

USART: Add DMA based receiver

2015-08-24 19:08:35 +00:00

board.h

USART: Add usart_info command

2015-08-24 19:08:30 +00:00

build.mk

Correct the EC name in the build.mk comments for some boards

2013-10-17 01:46:14 +00:00

ec.tasklist

basic support for STM32L-Discovery board