/***************************************************************************//** | |
* @file em_prs.c | |
* @brief Peripheral Reflex System (PRS) Peripheral API | |
* @version 5.1.2 | |
******************************************************************************* | |
* @section License | |
* <b>Copyright 2016 Silicon Laboratories, Inc. http://www.silabs.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: Silicon Labs has no | |
* obligation to support this Software. Silicon Labs 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. | |
* | |
* Silicon Labs 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" | |
#if defined(PRS_COUNT) && (PRS_COUNT > 0) | |
#include "em_assert.h" | |
/***************************************************************************//** | |
* @addtogroup emlib | |
* @{ | |
******************************************************************************/ | |
/***************************************************************************//** | |
* @addtogroup PRS | |
* @brief Peripheral Reflex System (PRS) Peripheral API | |
* @details | |
* This module contains functions to control the PRS peripheral of Silicon | |
* Labs 32-bit MCUs and SoCs. The PRS allows configurable, fast and autonomous | |
* communication between peripherals on the MCU or SoC. | |
* @{ | |
******************************************************************************/ | |
/******************************************************************************* | |
************************** 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 < PRS_CHAN_COUNT); | |
PRS->CH[ch].CTRL = (source & _PRS_CH_CTRL_SOURCESEL_MASK) | |
| (signal & _PRS_CH_CTRL_SIGSEL_MASK) | |
| (uint32_t)edge; | |
} | |
#if defined( PRS_CH_CTRL_ASYNC ) | |
/***************************************************************************//** | |
* @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 not supported on EFM32GxxxFyyy parts. | |
* 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 < PRS_CHAN_COUNT); | |
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 emlib) */ | |
#endif /* defined(PRS_COUNT) && (PRS_COUNT > 0) */ |