mirror of https://github.com/ARMmbed/mbed-os.git
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/***************************************************************************//**
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* @file clocking.h
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* @brief Clock selection calculations
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
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*******************************************************************************
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include "device_peripherals.h"
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#if( CORE_CLOCK_SOURCE == HFXO)
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# define REFERENCE_FREQUENCY HFXO_FREQUENCY
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#elif( CORE_CLOCK_SOURCE == HFRCO)
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# if defined _CMU_HFRCOCTRL_BAND_MASK
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# if( HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_1MHZ)
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# define REFERENCE_FREQUENCY 1000000
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# elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_7MHZ)
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# define REFERENCE_FREQUENCY 7000000
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# elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_11MHZ)
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# define REFERENCE_FREQUENCY 7000000
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# elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_14MHZ)
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# define REFERENCE_FREQUENCY 14000000
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# elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_21MHZ)
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# define REFERENCE_FREQUENCY 21000000
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# elif(HFRCO_FREQUENCY == _CMU_HFRCOCTRL_BAND_28MHZ)
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# define REFERENCE_FREQUENCY 28000000
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# else
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# define REFERENCE_FREQUENCY 14000000
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# endif
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# elif defined _CMU_HFRCOCTRL_FREQRANGE_MASK
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# define REFERENCE_FREQUENCY HFRCO_FREQUENCY
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# else
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# error "HFRCO frequency not defined"
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# endif
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#endif
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#if ( LOW_ENERGY_CLOCK_SOURCE == LFXO )
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# define LEUART_USING_LFXO
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# if ( (defined(CMU_CTRL_HFLE) || defined(CMU_CTRL_WSHFLE) ) && (REFERENCE_FREQUENCY > 24000000) )
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# define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 4)
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# else
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# define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 2)
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# endif
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# define LEUART_LF_REF_FREQ LFXO_FREQUENCY
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#else
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# if ( (defined(CMU_CTRL_HFLE) || defined(CMU_CTRL_WSHFLE) ) && (REFERENCE_FREQUENCY > 24000000) )
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# define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 4)
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# else
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# define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 2)
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# endif
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#endif
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