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/***************************************************************************//**
* @file
* @brief Peripheral Reflex System (PRS) peripheral API
* @author Energy Micro AS
* @version 3.0.0
*******************************************************************************
* @section License
* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>
*******************************************************************************
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
* obligation to support this Software. Energy Micro AS is providing the
* Software "AS IS", with no express or implied warranties of any kind,
* including, but not limited to, any implied warranties of merchantability
* or fitness for any particular purpose or warranties against infringement
* of any proprietary rights of a third party.
*
* Energy Micro AS will not be liable for any consequential, incidental, or
* special damages, or any other relief, or for any claim by any third party,
* arising from your use of this Software.
*
******************************************************************************/
#ifndef __EM_PRS_H
#define __EM_PRS_H
#include "em_part.h"
#ifdef __cplusplus
extern "C" {
#endif
/***************************************************************************//**
* @addtogroup EM_Library
* @{
******************************************************************************/
/***************************************************************************//**
* @addtogroup PRS
* @{
******************************************************************************/
/*******************************************************************************
******************************** ENUMS ************************************
******************************************************************************/
/** Edge detection type. */
typedef enum
{
prsEdgeOff = PRS_CH_CTRL_EDSEL_OFF, /**< Leave signal as is. */
prsEdgePos = PRS_CH_CTRL_EDSEL_POSEDGE, /**< Generate pules on positive edge. */
prsEdgeNeg = PRS_CH_CTRL_EDSEL_NEGEDGE, /**< Generate pules on negative edge. */
prsEdgeBoth = PRS_CH_CTRL_EDSEL_BOTHEDGES /**< Generate pules on both edges. */
} PRS_Edge_TypeDef;
/*******************************************************************************
***************************** PROTOTYPES **********************************
******************************************************************************/
/***************************************************************************//**
* @brief
* Set level control bit for one or more channels.
*
* @details
* The level value for a channel is XORed with both the pulse possible issued
* by PRS_PulseTrigger() and the PRS input signal selected for the channel(s).
*
* @param[in] level
* Level to use for channels indicated by @p mask. Use logical OR combination
* of PRS_SWLEVEL_CHnLEVEL defines for channels to set high level, otherwise 0.
*
* @param[in] mask
* Mask indicating which channels to set level for. Use logical OR combination
* of PRS_SWLEVEL_CHnLEVEL defines.
******************************************************************************/
__STATIC_INLINE void PRS_LevelSet(uint32_t level, uint32_t mask)
{
PRS->SWLEVEL = (PRS->SWLEVEL & ~mask) | (level & mask);
}
/***************************************************************************//**
* @brief
* Trigger a high pulse (one HFPERCLK) for one or more channels.
*
* @details
* Setting a bit for a channel causes the bit in the register to remain high
* for one HFPERCLK cycle. The pulse is XORed with both the corresponding bit
* in PRS SWLEVEL register and the PRS input signal selected for the
* channel(s).
*
* @param[in] channels
* Logical ORed combination of channels to trigger a pulse for. Use
* PRS_SWPULSE_CHnPULSE defines.
******************************************************************************/
__STATIC_INLINE void PRS_PulseTrigger(uint32_t channels)
{
PRS->SWPULSE = channels & _PRS_SWPULSE_MASK;
}
void PRS_SourceSignalSet(unsigned int ch,
uint32_t source,
uint32_t signal,
PRS_Edge_TypeDef edge);
#if ((defined _EFM32_TINY_FAMILY) || (defined _EFM32_GIANT_FAMILY))
void PRS_SourceAsyncSignalSet(unsigned int ch,
uint32_t source,
uint32_t signal);
#endif
/** @} (end addtogroup PRS) */
/** @} (end addtogroup EM_Library) */
#ifdef __cplusplus
}
#endif
#endif /* __EM_PRS_H */
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