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/clocking.h@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
50:a417edff4437
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 2 * @file clocking.h
bogdanm 0:9b334a45a8ff 3 * @brief Clock selection calculations
bogdanm 0:9b334a45a8ff 4 *******************************************************************************
bogdanm 0:9b334a45a8ff 5 * @section License
bogdanm 0:9b334a45a8ff 6 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
bogdanm 0:9b334a45a8ff 7 *******************************************************************************
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * Permission is granted to anyone to use this software for any purpose,
bogdanm 0:9b334a45a8ff 10 * including commercial applications, and to alter it and redistribute it
bogdanm 0:9b334a45a8ff 11 * freely, subject to the following restrictions:
bogdanm 0:9b334a45a8ff 12 *
bogdanm 0:9b334a45a8ff 13 * 1. The origin of this software must not be misrepresented; you must not
bogdanm 0:9b334a45a8ff 14 * claim that you wrote the original software.
bogdanm 0:9b334a45a8ff 15 * 2. Altered source versions must be plainly marked as such, and must not be
bogdanm 0:9b334a45a8ff 16 * misrepresented as being the original software.
bogdanm 0:9b334a45a8ff 17 * 3. This notice may not be removed or altered from any source distribution.
bogdanm 0:9b334a45a8ff 18 *
bogdanm 0:9b334a45a8ff 19 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
bogdanm 0:9b334a45a8ff 20 * obligation to support this Software. Silicon Labs is providing the
bogdanm 0:9b334a45a8ff 21 * Software "AS IS", with no express or implied warranties of any kind,
bogdanm 0:9b334a45a8ff 22 * including, but not limited to, any implied warranties of merchantability
bogdanm 0:9b334a45a8ff 23 * or fitness for any particular purpose or warranties against infringement
bogdanm 0:9b334a45a8ff 24 * of any proprietary rights of a third party.
bogdanm 0:9b334a45a8ff 25 *
bogdanm 0:9b334a45a8ff 26 * Silicon Labs will not be liable for any consequential, incidental, or
bogdanm 0:9b334a45a8ff 27 * special damages, or any other relief, or for any claim by any third party,
bogdanm 0:9b334a45a8ff 28 * arising from your use of this Software.
bogdanm 0:9b334a45a8ff 29 *
bogdanm 0:9b334a45a8ff 30 ******************************************************************************/
bogdanm 0:9b334a45a8ff 31
bogdanm 0:9b334a45a8ff 32 #include "device_peripherals.h"
bogdanm 0:9b334a45a8ff 33
bogdanm 0:9b334a45a8ff 34 #if( CORE_CLOCK_SOURCE == HFXO)
bogdanm 0:9b334a45a8ff 35 #define REFERENCE_FREQUENCY HFXO_FREQUENCY
bogdanm 0:9b334a45a8ff 36 #elif( CORE_CLOCK_SOURCE == HFRCO)
bogdanm 0:9b334a45a8ff 37 #if( HFRCO_FREQUENCY == CMU_HFRCOCTRL_BAND_1MHZ)
bogdanm 0:9b334a45a8ff 38 #define REFERENCE_FREQUENCY 1000000
bogdanm 0:9b334a45a8ff 39 #elif(HFRCO_FREQUENCY == CMU_HFRCOCTRL_BAND_7MHZ)
bogdanm 0:9b334a45a8ff 40 #define REFERENCE_FREQUENCY 7000000
bogdanm 0:9b334a45a8ff 41 #elif(HFRCO_FREQUENCY == CMU_HFRCOCTRL_BAND_11MHZ)
bogdanm 0:9b334a45a8ff 42 #define REFERENCE_FREQUENCY 7000000
bogdanm 0:9b334a45a8ff 43 #elif(HFRCO_FREQUENCY == CMU_HFRCOCTRL_BAND_14MHZ)
bogdanm 0:9b334a45a8ff 44 #define REFERENCE_FREQUENCY 14000000
bogdanm 0:9b334a45a8ff 45 #elif(HFRCO_FREQUENCY == CMU_HFRCOCTRL_BAND_21MHZ)
bogdanm 0:9b334a45a8ff 46 #define REFERENCE_FREQUENCY 21000000
bogdanm 0:9b334a45a8ff 47 #elif(HFRCO_FREQUENCY == CMU_HFRCOCTRL_BAND_28MHZ)
bogdanm 0:9b334a45a8ff 48 #define REFERENCE_FREQUENCY 28000000
bogdanm 0:9b334a45a8ff 49 #else
bogdanm 0:9b334a45a8ff 50 #define REFERENCE_FREQUENCY 14000000
bogdanm 0:9b334a45a8ff 51 #endif
bogdanm 0:9b334a45a8ff 52 #endif
bogdanm 0:9b334a45a8ff 53
bogdanm 0:9b334a45a8ff 54 #if ( LOW_ENERGY_CLOCK_SOURCE == LFXO )
bogdanm 0:9b334a45a8ff 55 #define LEUART_USING_LFXO
bogdanm 0:9b334a45a8ff 56 #if ( defined(CMU_CTRL_HFLE) && (REFERENCE_FREQUENCY > 24000000) )
bogdanm 0:9b334a45a8ff 57 #define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 4)
bogdanm 0:9b334a45a8ff 58 #else
bogdanm 0:9b334a45a8ff 59 #define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 2)
bogdanm 0:9b334a45a8ff 60 #endif
bogdanm 0:9b334a45a8ff 61 #define LEUART_LF_REF_FREQ LFXO_FREQUENCY
bogdanm 0:9b334a45a8ff 62 #else
bogdanm 0:9b334a45a8ff 63 #if ( defined(CMU_CTRL_HFLE) && (REFERENCE_FREQUENCY > 24000000) )
bogdanm 0:9b334a45a8ff 64 #define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 4)
bogdanm 0:9b334a45a8ff 65 #else
bogdanm 0:9b334a45a8ff 66 #define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 2)
bogdanm 0:9b334a45a8ff 67 #endif
bogdanm 0:9b334a45a8ff 68 #endif