104 lines
3.8 KiB
C
104 lines
3.8 KiB
C
/***************************************************************************//**
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* @file
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* @brief EFM32 bitband utilities.
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* @author Energy Micro AS
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* @version 1.3.0
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2010 Energy Micro AS, http://www.energymicro.com</b>
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*******************************************************************************
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*
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* This source code is the property of Energy Micro AS. The source and compiled
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* code may only be used on Energy Micro "EFM32" microcontrollers.
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*
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* This copyright notice may not be removed from the source code nor changed.
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*
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* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
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* obligation to support this Software. Energy Micro AS is providing the
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* Software "AS IS", with no express or implied warranties of any kind,
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* including, but not limited to, any implied warranties of merchantability
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* or fitness for any particular purpose or warranties against infringement
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* of any proprietary rights of a third party.
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*
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* Energy Micro AS will not be liable for any consequential, incidental, or
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* special damages, or any other relief, or for any claim by any third party,
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* arising from your use of this Software.
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*
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******************************************************************************/
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#ifndef __EFM32_BITBAND_H
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#define __EFM32_BITBAND_H
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#include "efm32.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/***************************************************************************//**
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* @addtogroup EFM32_Library
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* @{
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******************************************************************************/
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/***************************************************************************//**
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* @addtogroup BITBAND
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* @brief EFM32 bit-band utilities.
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* @{
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******************************************************************************/
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/***************************************************************************//**
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* @brief
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* Perform bit-band operation on peripheral memory location.
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*
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* @details
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* Bit-banding provides atomic read-modify-write cycle for single bit
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* modification. Please refer to the reference manual for further details
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* about bit-banding.
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*
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* @param[in,out] addr Peripheral address location to modify bit in.
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*
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* @param[in] bit Bit position to modify, 0-31.
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*
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* @param[in] val Value to set bit to, 0 or 1.
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******************************************************************************/
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static __INLINE void BITBAND_Peripheral(volatile uint32_t *addr,
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uint32_t bit,
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uint32_t val)
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{
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uint32_t tmp = BITBAND_PER_BASE + (((uint32_t) addr - PER_MEM_BASE) * 32) + (bit * 4);
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*((volatile uint32_t *) tmp) = (uint32_t) val;
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}
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/***************************************************************************//**
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* @brief
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* Perform bit-band operation on SRAM memory location.
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*
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* @details
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* Bit-banding provides atomic read-modify-write cycle for single bit
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* modification. Please refer to the reference manual for further details
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* about bit-banding.
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*
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* @param[in,out] addr SRAM address location to modify bit in.
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*
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* @param[in] bit Bit position to modify, 0-31.
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*
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* @param[in] val Value to set bit to, 0 or 1.
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******************************************************************************/
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static __INLINE void BITBAND_SRAM(uint32_t *addr, uint32_t bit, uint32_t val)
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{
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uint32_t tmp = BITBAND_RAM_BASE + (((uint32_t) addr - RAM_MEM_BASE) * 32) + (bit * 4);
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*((volatile uint32_t *) tmp) = (uint32_t) val;
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}
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/** @} (end addtogroup BITBAND) */
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/** @} (end addtogroup EFM32_Library) */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __EFM32_BITBAND_H */
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