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| author | Anton Staaf <robotboy@chromium.org> | 2015-02-18 10:25:45 -0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-02-24 03:08:07 +0000 |
| commit | d2964ba0cf936dc46da3b8f102a420483d0e69d2 (patch) | |
| tree | 014f73cb92cb11f4de7242423b345474e041dc5b /chip/stm32/usart-stm32f3.h | |
| parent | a8628526a3a4790a1890ecffc6df1d42644697c8 (diff) | |
| download | chrome-ec-d2964ba0cf936dc46da3b8f102a420483d0e69d2.tar.gz | |
USART: Add STM32F3 support and fix STM32F baud rate bug
Previously the STM32F3 support was non-functional due to
it being a cut and paste of the STM32F0, and the clocks
are not set up the same way on the two platforms. Also,
the STM32F initialization code was incorrectly calling
the F0/L buad rate setup code.
This change has the variant specific USART code pass the
input frequency to the baud rate divisor clock to the
baud rate setup code, instead of that code calling
clock_get_freq() to determine the input clock frequency.
This is required because the STM32F3 is not configured
such that the clock_get_freq value and the input to
the USART baud rate divisor match.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
BRANCH=None
BUG=None
TEST=make buildall -j
Verify USART works on discovery as well as Ryu
Change-Id: I71248d83b53969d0e7020747a9bb9570803f30ac
Reviewed-on: https://chromium-review.googlesource.com/250920
Reviewed-by: Vic Yang <victoryang@chromium.org>
Trybot-Ready: Anton Staaf <robotboy@chromium.org>
Tested-by: Anton Staaf <robotboy@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>
Diffstat (limited to 'chip/stm32/usart-stm32f3.h')
| -rw-r--r-- | chip/stm32/usart-stm32f3.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/chip/stm32/usart-stm32f3.h b/chip/stm32/usart-stm32f3.h new file mode 100644 index 0000000000..ebf972aab9 --- /dev/null +++ b/chip/stm32/usart-stm32f3.h @@ -0,0 +1,20 @@ +/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef CHIP_STM32_USART_STM32F3_H +#define CHIP_STM32_USART_STM32F3_H + +#include "usart.h" + +#define STM32_USARTS_MAX 3 + +/* + * The STM32F3 series can have as many as three UARTS. These are the HW configs + * for those UARTS. They can be used to initialize STM32 generic UART configs. + */ +extern struct usart_hw_config const usart1_hw; +extern struct usart_hw_config const usart2_hw; +extern struct usart_hw_config const usart3_hw; + +#endif /* CHIP_STM32_USART_STM32F3_H */ |