Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_prs.c@50:a417edff4437, 2016-01-15 (annotated)

Committer:
mbed_official
Date:
Fri Jan 15 07:45:16 2016 +0000
Revision:
50:a417edff4437
Parent:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Synchronized with git revision 6010f32619bfcbb01cc73747d4ff9040863482d9



Full URL: https://github.com/mbedmicro/mbed/commit/6010f32619bfcbb01cc73747d4ff9040863482d9/



Remove doubling of buffer size in realiseEndpoint()

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 2 * @file em_prs.c
bogdanm 0:9b334a45a8ff 3 * @brief Peripheral Reflex System (PRS) Peripheral API
mbed_official 50:a417edff4437 4 * @version 4.2.1
bogdanm 0:9b334a45a8ff 5 *******************************************************************************
bogdanm 0:9b334a45a8ff 6 * @section License
mbed_official 50:a417edff4437 7 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
bogdanm 0:9b334a45a8ff 8 *******************************************************************************
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Permission is granted to anyone to use this software for any purpose,
bogdanm 0:9b334a45a8ff 11 * including commercial applications, and to alter it and redistribute it
bogdanm 0:9b334a45a8ff 12 * freely, subject to the following restrictions:
bogdanm 0:9b334a45a8ff 13 *
bogdanm 0:9b334a45a8ff 14 * 1. The origin of this software must not be misrepresented; you must not
bogdanm 0:9b334a45a8ff 15 * claim that you wrote the original software.
bogdanm 0:9b334a45a8ff 16 * 2. Altered source versions must be plainly marked as such, and must not be
bogdanm 0:9b334a45a8ff 17 * misrepresented as being the original software.
bogdanm 0:9b334a45a8ff 18 * 3. This notice may not be removed or altered from any source distribution.
bogdanm 0:9b334a45a8ff 19 *
bogdanm 0:9b334a45a8ff 20 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
bogdanm 0:9b334a45a8ff 21 * obligation to support this Software. Silicon Labs is providing the
bogdanm 0:9b334a45a8ff 22 * Software "AS IS", with no express or implied warranties of any kind,
bogdanm 0:9b334a45a8ff 23 * including, but not limited to, any implied warranties of merchantability
bogdanm 0:9b334a45a8ff 24 * or fitness for any particular purpose or warranties against infringement
bogdanm 0:9b334a45a8ff 25 * of any proprietary rights of a third party.
bogdanm 0:9b334a45a8ff 26 *
bogdanm 0:9b334a45a8ff 27 * Silicon Labs will not be liable for any consequential, incidental, or
bogdanm 0:9b334a45a8ff 28 * special damages, or any other relief, or for any claim by any third party,
bogdanm 0:9b334a45a8ff 29 * arising from your use of this Software.
bogdanm 0:9b334a45a8ff 30 *
bogdanm 0:9b334a45a8ff 31 ******************************************************************************/
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 #include "em_prs.h"
bogdanm 0:9b334a45a8ff 34 #if defined(PRS_COUNT) && (PRS_COUNT > 0)
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 #include "em_assert.h"
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 39 * @addtogroup EM_Library
bogdanm 0:9b334a45a8ff 40 * @{
bogdanm 0:9b334a45a8ff 41 ******************************************************************************/
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 44 * @addtogroup PRS
bogdanm 0:9b334a45a8ff 45 * @brief Peripheral Reflex System (PRS) Peripheral API
bogdanm 0:9b334a45a8ff 46 * @{
bogdanm 0:9b334a45a8ff 47 ******************************************************************************/
bogdanm 0:9b334a45a8ff 48
bogdanm 0:9b334a45a8ff 49 /*******************************************************************************
bogdanm 0:9b334a45a8ff 50 ************************** GLOBAL FUNCTIONS *******************************
bogdanm 0:9b334a45a8ff 51 ******************************************************************************/
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 54 * @brief
bogdanm 0:9b334a45a8ff 55 * Set source and signal to be used for a channel.
bogdanm 0:9b334a45a8ff 56 *
bogdanm 0:9b334a45a8ff 57 * @param[in] ch
bogdanm 0:9b334a45a8ff 58 * Channel to define signal and source for.
bogdanm 0:9b334a45a8ff 59 *
bogdanm 0:9b334a45a8ff 60 * @param[in] source
bogdanm 0:9b334a45a8ff 61 * Source to select for channel. Use one of PRS_CH_CTRL_SOURCESEL_x defines.
bogdanm 0:9b334a45a8ff 62 *
bogdanm 0:9b334a45a8ff 63 * @param[in] signal
bogdanm 0:9b334a45a8ff 64 * Signal (for selected @p source) to use. Use one of PRS_CH_CTRL_SIGSEL_x
bogdanm 0:9b334a45a8ff 65 * defines.
bogdanm 0:9b334a45a8ff 66 *
bogdanm 0:9b334a45a8ff 67 * @param[in] edge
bogdanm 0:9b334a45a8ff 68 * Edge (for selected source/signal) to generate pulse for.
bogdanm 0:9b334a45a8ff 69 ******************************************************************************/
bogdanm 0:9b334a45a8ff 70 void PRS_SourceSignalSet(unsigned int ch,
bogdanm 0:9b334a45a8ff 71 uint32_t source,
bogdanm 0:9b334a45a8ff 72 uint32_t signal,
bogdanm 0:9b334a45a8ff 73 PRS_Edge_TypeDef edge)
bogdanm 0:9b334a45a8ff 74 {
bogdanm 0:9b334a45a8ff 75 EFM_ASSERT(ch < PRS_CHAN_COUNT);
bogdanm 0:9b334a45a8ff 76
mbed_official 50:a417edff4437 77 PRS->CH[ch].CTRL = (source & _PRS_CH_CTRL_SOURCESEL_MASK)
mbed_official 50:a417edff4437 78 | (signal & _PRS_CH_CTRL_SIGSEL_MASK)
mbed_official 50:a417edff4437 79 | (uint32_t)edge;
bogdanm 0:9b334a45a8ff 80 }
bogdanm 0:9b334a45a8ff 81
bogdanm 0:9b334a45a8ff 82 #if defined( PRS_CH_CTRL_ASYNC )
bogdanm 0:9b334a45a8ff 83 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 84 * @brief
bogdanm 0:9b334a45a8ff 85 * Set source and asynchronous signal to be used for a channel.
bogdanm 0:9b334a45a8ff 86 *
bogdanm 0:9b334a45a8ff 87 * @details
bogdanm 0:9b334a45a8ff 88 * Asynchronous reflexes are not clocked on HFPERCLK, and can be used even in
bogdanm 0:9b334a45a8ff 89 * EM2/EM3.
bogdanm 0:9b334a45a8ff 90 * There is a limitation to reflexes operating in asynchronous mode: they can
bogdanm 0:9b334a45a8ff 91 * only be used by a subset of the reflex consumers. Please refer to PRS
bogdanm 0:9b334a45a8ff 92 * chapter in the reference manual for the complete list of supported
bogdanm 0:9b334a45a8ff 93 * asynchronous signals and consumers.
bogdanm 0:9b334a45a8ff 94 *
bogdanm 0:9b334a45a8ff 95 * @note
mbed_official 50:a417edff4437 96 * This function is not supported on EFM32GxxxFyyy parts.
bogdanm 0:9b334a45a8ff 97 * In asynchronous mode, the edge detector only works in EM0, hence it shall
bogdanm 0:9b334a45a8ff 98 * not be used. The EDSEL parameter in PRS_CHx_CTRL register is set to 0 (OFF)
bogdanm 0:9b334a45a8ff 99 * by default.
bogdanm 0:9b334a45a8ff 100 *
bogdanm 0:9b334a45a8ff 101 * @param[in] ch
bogdanm 0:9b334a45a8ff 102 * Channel to define source and asynchronous signal for.
bogdanm 0:9b334a45a8ff 103 *
bogdanm 0:9b334a45a8ff 104 * @param[in] source
bogdanm 0:9b334a45a8ff 105 * Source to select for channel. Use one of PRS_CH_CTRL_SOURCESEL_x defines.
bogdanm 0:9b334a45a8ff 106 *
bogdanm 0:9b334a45a8ff 107 * @param[in] signal
bogdanm 0:9b334a45a8ff 108 * Asynchronous signal (for selected @p source) to use. Use one of the
bogdanm 0:9b334a45a8ff 109 * PRS_CH_CTRL_SIGSEL_x defines that support asynchronous operation.
bogdanm 0:9b334a45a8ff 110 ******************************************************************************/
bogdanm 0:9b334a45a8ff 111 void PRS_SourceAsyncSignalSet(unsigned int ch,
bogdanm 0:9b334a45a8ff 112 uint32_t source,
bogdanm 0:9b334a45a8ff 113 uint32_t signal)
bogdanm 0:9b334a45a8ff 114 {
bogdanm 0:9b334a45a8ff 115 EFM_ASSERT(ch < PRS_CHAN_COUNT);
bogdanm 0:9b334a45a8ff 116
mbed_official 50:a417edff4437 117 PRS->CH[ch].CTRL = PRS_CH_CTRL_ASYNC
mbed_official 50:a417edff4437 118 | (source & _PRS_CH_CTRL_SOURCESEL_MASK)
mbed_official 50:a417edff4437 119 | (signal & _PRS_CH_CTRL_SIGSEL_MASK)
mbed_official 50:a417edff4437 120 | PRS_CH_CTRL_EDSEL_OFF;
bogdanm 0:9b334a45a8ff 121 }
bogdanm 0:9b334a45a8ff 122 #endif
bogdanm 0:9b334a45a8ff 123
bogdanm 0:9b334a45a8ff 124 /** @} (end addtogroup PRS) */
bogdanm 0:9b334a45a8ff 125 /** @} (end addtogroup EM_Library) */
bogdanm 0:9b334a45a8ff 126 #endif /* defined(PRS_COUNT) && (PRS_COUNT > 0) */