fba08c2d9a
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4471 42af7a65-404d-4744-a932-0658087f49c3
117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
/****************************************************************************
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* arch/arm/src/stm32/stm32_rcc.c
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*
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* Copyright (C) 2009, 2011-2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <assert.h>
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#include <debug.h>
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#include <arch/board/board.h>
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#include "up_internal.h"
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#include "up_arch.h"
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#include "chip.h"
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#include "stm32_rcc.h"
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#include "stm32_flash.h"
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#include "stm32_internal.h"
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#include "stm32_waste.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* Allow up to 100 milliseconds for the high speed clock to become ready.
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* that is a very long delay, but if the clock does not become ready we are
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* hosed anyway.
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*/
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#define HSERDY_TIMEOUT (100 * CONFIG_BOARD_LOOPSPERMSEC)
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/* Include chip-specific clocking initialization logic */
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#if defined(CONFIG_STM32_STM32F10XX)
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# include "chip/stm32f10xxx_rcc.c"
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#elif defined(CONFIG_STM32_STM32F20XX)
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# include "chip/stm32f20xxx_rcc.c"
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#elif defined(CONFIG_STM32_STM32F40XX)
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# include "chip/stm32f40xxx_rcc.c"
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#else
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# error "Unsupported STM32 chip"
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void stm32_clockconfig(void)
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{
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/* Make sure that we are starting in the reset state */
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rcc_reset();
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#if defined(CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG)
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/* Invoke Board Custom Clock Configuration */
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stm32_board_clockconfig();
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#else
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/* Invoke standard, fixed clock configuration based on definitions in board.h */
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stm32_stdclockconfig();
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#endif
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/* Enable peripheral clocking */
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rcc_enableperipherals();
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}
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