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TARGET_EFM32PG_STK3401/TOOLCHAIN_IAR/clocking.h
- Committer:
- AnnaBridge
- Date:
- 2018-11-08
- Revision:
- 171:3a7713b1edbc
- Parent:
- TARGET_TB_SENSE_12/TARGET_Silicon_Labs/TARGET_EFM32/common/clocking.h@ 169:a7c7b631e539
File content as of revision 171:3a7713b1edbc:
/***************************************************************************//** * @file clocking.h * @brief Clock selection calculations ******************************************************************************* * @section License * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b> ******************************************************************************* * * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ #ifndef MBED_CLOCKING_H #define MBED_CLOCKING_H #include "em_cmu.h" /* Clock definitions */ #define LFXO 0 #define HFXO 1 #define LFRCO 2 #define HFRCO 3 #if !defined(_EFM32_GECKO_FAMILY) #define ULFRCO 4 #endif /* Low Energy peripheral clock source. * Options: * * LFXO: external crystal, please define frequency. * * LFRCO: internal RC oscillator (32.768kHz) * * ULFRCO: internal ultra-low power RC oscillator (available down to EM3) (1kHz) */ #ifndef LOW_ENERGY_CLOCK_SOURCE #define LOW_ENERGY_CLOCK_SOURCE LFXO #endif /** Core clock source. * Options: * * HFXO: external crystal, please define frequency. * * HFRCO: High-frequency internal RC oscillator. Please select band as well. */ #ifndef CORE_CLOCK_SOURCE #define CORE_CLOCK_SOURCE HFRCO #if defined(_CMU_HFRCOCTRL_BAND_MASK) #define HFRCO_FREQUENCY_ENUM _CMU_HFRCOCTRL_BAND_21MHZ #define HFRCO_FREQUENCY 21000000 #elif defined(_CMU_HFRCOCTRL_FREQRANGE_MASK) #define HFRCO_FREQUENCY_ENUM cmuHFRCOFreq_32M0Hz #define HFRCO_FREQUENCY 32000000 #endif #endif // CORE_CLOCK_SOURCE #if !defined(LFXO_FREQUENCY) && (LOW_ENERGY_CLOCK_SOURCE == LFXO) #error "LFXO frequency is undefined!" #endif #if !defined(HFXO_FREQUENCY) && (CORE_CLOCK_SOURCE == HFXO) #error "HFXO frequency is undefined!" #endif #if (LOW_ENERGY_CLOCK_SOURCE == LFXO) #define LOW_ENERGY_CLOCK_FREQUENCY LFXO_FREQUENCY #elif (LOW_ENERGY_CLOCK_SOURCE == LFRCO) #define LOW_ENERGY_CLOCK_FREQUENCY 32768 #elif (LOW_ENERGY_CLOCK_SOURCE == ULFRCO) #define LOW_ENERGY_CLOCK_FREQUENCY 1000 #else #error "Unknown Low Energy Clock selection" #endif #if( CORE_CLOCK_SOURCE == HFXO) # define REFERENCE_FREQUENCY HFXO_FREQUENCY #elif( CORE_CLOCK_SOURCE == HFRCO) #if !defined(HFRCO_FREQUENCY) # error "HFRCO frequency is not defined!" #else # define REFERENCE_FREQUENCY HFRCO_FREQUENCY #endif #endif #if ( LOW_ENERGY_CLOCK_SOURCE == LFXO ) # define LEUART_USING_LFXO # if ( (defined(CMU_CTRL_HFLE) || defined(CMU_CTRL_WSHFLE) ) && (REFERENCE_FREQUENCY > 24000000) ) # define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 4) # else # define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 2) # endif # define LEUART_LF_REF_FREQ LFXO_FREQUENCY #else # if ( (defined(CMU_CTRL_HFLE) || defined(CMU_CTRL_WSHFLE) ) && (REFERENCE_FREQUENCY > 24000000) ) # define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 4) # else # define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 2) # endif #endif /* Adjust this to change speed of RTC and LP ticker ticks */ #define RTC_CLOCKDIV cmuClkDiv_1 /* Adjust this to match RTC_CLOCKDIV as integer value */ #define RTC_CLOCKDIV_INT 1U /* Adjust this to match RTC_CLOCKDIV as shift for 1 second worth of ticks. * E.g. with 32768 Hz crystal and CLOCKDIV of 8, 1 second is 4096 ticks. * 4096 equals 1 << 12, so RTC_FREQ_SHIFT needs to be 12. */ #define RTC_FREQ_SHIFT 15U #endif