91 lines
3.0 KiB
C
91 lines
3.0 KiB
C
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/************************************************************************************
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* arch/arm/src/stm32/stm32_pwr.c
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*
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* Copyright (C) 2011 Uros Platise. All rights reserved.
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* Author: Uros Platise <uros.platise@isotel.eu>
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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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/** \file
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* \author Uros Platise
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* \brief STM32 Power
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*
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* \addtogroup STM32_PWR
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* \{
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*/
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#include <nuttx/config.h>
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#include <nuttx/arch.h>
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#include <stdint.h>
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#include <errno.h>
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#include "up_arch.h"
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#include "stm32_pwr.h"
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#if defined(CONFIG_STM32_PWR)
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/************************************************************************************
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* Private Functions
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************************************************************************************/
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static inline uint16_t stm32_pwr_getreg(uint8_t offset)
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{
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return getreg32(STM32_PWR_BASE + offset);
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}
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static inline void stm32_pwr_putreg(uint8_t offset, uint16_t value)
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{
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putreg32(value, STM32_PWR_BASE + offset);
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}
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static inline void stm32_pwr_modifyreg(uint8_t offset, uint16_t clearbits, uint16_t setbits)
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{
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modifyreg32(STM32_PWR_BASE + offset, clearbits, setbits);
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}
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/************************************************************************************
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* Public Function - Initialization
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************************************************************************************/
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void stm32_pwr_enablebkp(void)
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{
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stm32_pwr_modifyreg(STM32_PWR_CR_OFFSET, 0, PWR_CR_DBP);
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}
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#endif // defined(CONFIG_STM32_PWR)
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/** \} */
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