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ac4c3020de
It turns out that even when the UART status register returns TX_IDLE
bit set, the transmitter is still active - probably working out the
stop sequence.
So, resetting immediately after TX_EMPTY is asserted causes the last
character to be corrupted on the receiving side.
This patch adds a wait for the duration of transmitting 10 bits at
115200 baud, which should be plenty. Wait loop in capped in case timer
is not running for any reason.
BRANCH=none
BUG=chrome-os-partner:60321
TEST=added code to print out a string and then call cflush() and reset
immediately. The last character is not lost any more, the exact
string is printed.
Change-Id: If386c515d9d9cc63d161fba73e6ed4e70e465136
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/418487
Reviewed-by: Mary Ruthven <mruthven@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