118 lines
4.7 KiB
C
118 lines
4.7 KiB
C
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/***************************************************************************//**
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* @file
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* @brief Peripheral Reflex System (PRS) peripheral API for EFM32.
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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_PRS_H
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#define __EFM32_PRS_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 PRS
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* @{
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******************************************************************************/
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/*******************************************************************************
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******************************** ENUMS ************************************
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******************************************************************************/
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/** Edge detection type. */
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typedef enum
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{
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prsEdgeOff = PRS_CH_CTRL_EDSEL_OFF, /**< Leave signal as is. */
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prsEdgePos = PRS_CH_CTRL_EDSEL_POSEDGE, /**< Generate pules on positive edge. */
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prsEdgeNeg = PRS_CH_CTRL_EDSEL_NEGEDGE, /**< Generate pules on negative edge. */
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prsEdgeBoth = PRS_CH_CTRL_EDSEL_BOTHEDGES /**< Generate pules on both edges. */
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} PRS_Edge_TypeDef;
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/*******************************************************************************
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***************************** PROTOTYPES **********************************
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******************************************************************************/
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/***************************************************************************//**
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* @brief
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* Set level control bit for one or more channels.
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*
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* @details
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* The level value for a channel is XORed with both the pulse possible issued
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* by PRS_PulseTrigger() and the PRS input signal selected for the channel(s).
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*
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* @param[in] level
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* Level to use for channels indicated by @p mask. Use logical OR combination
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* of PRS_SWLEVEL_CHnLEVEL defines for channels to set high level, otherwise 0.
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*
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* @param[in] mask
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* Mask indicating which channels to set level for. Use logical OR combination
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* of PRS_SWLEVEL_CHnLEVEL defines.
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******************************************************************************/
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static __INLINE void PRS_LevelSet(uint32_t level, uint32_t mask)
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{
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PRS->SWLEVEL = (PRS->SWLEVEL & ~mask) | (level & mask);
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}
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/***************************************************************************//**
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* @brief
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* Trigger a high pulse (one HFPERCLK) for one or more channels.
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*
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* @details
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* Setting a bit for a channel causes the bit in the register to remain high
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* for one HFPERCLK cycle. The pulse is XORed with both the corresponding bit
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* in PRS SWLEVEL register and the PRS input signal selected for the
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* channel(s).
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*
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* @param[in] channels
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* Logical ORed combination of channels to trigger a pulse for. Use
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* PRS_SWPULSE_CHnPULSE defines.
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******************************************************************************/
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static __INLINE void PRS_PulseTrigger(uint32_t channels)
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{
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PRS->SWPULSE = channels & _PRS_SWPULSE_MASK;
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}
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void PRS_SourceSignalSet(unsigned int ch,
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uint32_t source,
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uint32_t signal,
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PRS_Edge_TypeDef edge);
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/** @} (end addtogroup PRS) */
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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_PRS_H */
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