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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.
*
******************************************************************************/
#include "em_prs.h"
#include "em_assert.h"
#include "em_bitband.h"
/***************************************************************************//**
* @addtogroup EM_Library
* @{
******************************************************************************/
/***************************************************************************//**
* @addtogroup PRS
* @brief Peripheral Reflex System (PRS) Peripheral API
* @{
******************************************************************************/
/*******************************************************************************
************************** GLOBAL FUNCTIONS *******************************
******************************************************************************/
/***************************************************************************//**
* @brief
* Set source and signal to be used for a channel.
*
* @param[in] ch
* Channel to define signal and source for.
*
* @param[in] source
* Source to select for channel. Use one of PRS_CH_CTRL_SOURCESEL_x defines.
*
* @param[in] signal
* Signal (for selected @p source) to use. Use one of PRS_CH_CTRL_SIGSEL_x
* defines.
*
* @param[in] edge
* Edge (for selected source/signal) to generate pulse for.
******************************************************************************/
void PRS_SourceSignalSet(unsigned int ch,
uint32_t source,
uint32_t signal,
PRS_Edge_TypeDef edge)
{
EFM_ASSERT(ch < 8);
PRS->CH[ch].CTRL = (source & _PRS_CH_CTRL_SOURCESEL_MASK) |
(signal & _PRS_CH_CTRL_SIGSEL_MASK) |
(uint32_t)edge;
}
#if ((defined _EFM32_TINY_FAMILY) || (defined _EFM32_GIANT_FAMILY))
/***************************************************************************//**
* @brief
* Set source and asynchronous signal to be used for a channel.
*
* @details
* Asynchronous reflexes are not clocked on HFPERCLK, and can be used even in
* EM2/EM3.
* There is a limitation to reflexes operating in asynchronous mode: they can
* only be used by a subset of the reflex consumers. Please refer to PRS
* chapter in the reference manual for the complete list of supported
* asynchronous signals and consumers.
*
* @note
* This function is only supported on the following device families:
* @li Tiny Gecko (EFM32TGxxxFxx)
* @li Giant Gecko (EFM32GGxxxFxxx)
* In asynchronous mode, the edge detector only works in EM0, hence it shall
* not be used. The EDSEL parameter in PRS_CHx_CTRL register is set to 0 (OFF)
* by default.
*
* @param[in] ch
* Channel to define source and asynchronous signal for.
*
* @param[in] source
* Source to select for channel. Use one of PRS_CH_CTRL_SOURCESEL_x defines.
*
* @param[in] signal
* Asynchronous signal (for selected @p source) to use. Use one of the
* PRS_CH_CTRL_SIGSEL_x defines that support asynchronous operation.
******************************************************************************/
void PRS_SourceAsyncSignalSet(unsigned int ch,
uint32_t source,
uint32_t signal)
{
EFM_ASSERT(ch < 8);
PRS->CH[ch].CTRL = PRS_CH_CTRL_ASYNC |
(source & _PRS_CH_CTRL_SOURCESEL_MASK) |
(signal & _PRS_CH_CTRL_SIGSEL_MASK) |
PRS_CH_CTRL_EDSEL_OFF;
}
#endif
/** @} (end addtogroup PRS) */
/** @} (end addtogroup EM_Library) */
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