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TARGET_EFM32PG_STK3401/TOOLCHAIN_IAR/clocking.h@172:65be27845400, 2019-02-20 (annotated)
- Committer:
- AnnaBridge
- Date:
- Wed Feb 20 20:53:29 2019 +0000
- Revision:
- 172:65be27845400
- Parent:
- 171:3a7713b1edbc
mbed library release version 165
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| Anna Bridge |
142:4eea097334d6 | 1 | /***************************************************************************//** |
| Anna Bridge |
142:4eea097334d6 | 2 | * @file clocking.h |
| Anna Bridge |
142:4eea097334d6 | 3 | * @brief Clock selection calculations |
| Anna Bridge |
142:4eea097334d6 | 4 | ******************************************************************************* |
| Anna Bridge |
142:4eea097334d6 | 5 | * @section License |
| Anna Bridge |
142:4eea097334d6 | 6 | * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b> |
| Anna Bridge |
142:4eea097334d6 | 7 | ******************************************************************************* |
| Anna Bridge |
142:4eea097334d6 | 8 | * |
| Anna Bridge |
142:4eea097334d6 | 9 | * SPDX-License-Identifier: Apache-2.0 |
| Anna Bridge |
142:4eea097334d6 | 10 | * |
| Anna Bridge |
142:4eea097334d6 | 11 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| Anna Bridge |
142:4eea097334d6 | 12 | * not use this file except in compliance with the License. |
| Anna Bridge |
142:4eea097334d6 | 13 | * You may obtain a copy of the License at |
| Anna Bridge |
142:4eea097334d6 | 14 | * |
| Anna Bridge |
142:4eea097334d6 | 15 | * http://www.apache.org/licenses/LICENSE-2.0 |
| Anna Bridge |
142:4eea097334d6 | 16 | * |
| Anna Bridge |
142:4eea097334d6 | 17 | * Unless required by applicable law or agreed to in writing, software |
| Anna Bridge |
142:4eea097334d6 | 18 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| Anna Bridge |
142:4eea097334d6 | 19 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| Anna Bridge |
142:4eea097334d6 | 20 | * See the License for the specific language governing permissions and |
| Anna Bridge |
142:4eea097334d6 | 21 | * limitations under the License. |
| Anna Bridge |
142:4eea097334d6 | 22 | * |
| Anna Bridge |
142:4eea097334d6 | 23 | ******************************************************************************/ |
| Anna Bridge |
142:4eea097334d6 | 24 | #ifndef MBED_CLOCKING_H |
| Anna Bridge |
142:4eea097334d6 | 25 | #define MBED_CLOCKING_H |
| Anna Bridge |
142:4eea097334d6 | 26 | |
| AnnaBridge | 161:aa5281ff4a02 | 27 | #include "em_cmu.h" |
| AnnaBridge | 161:aa5281ff4a02 | 28 | |
| Anna Bridge |
142:4eea097334d6 | 29 | /* Clock definitions */ |
| Anna Bridge |
142:4eea097334d6 | 30 | #define LFXO 0 |
| Anna Bridge |
142:4eea097334d6 | 31 | #define HFXO 1 |
| Anna Bridge |
142:4eea097334d6 | 32 | #define LFRCO 2 |
| Anna Bridge |
142:4eea097334d6 | 33 | #define HFRCO 3 |
| Anna Bridge |
142:4eea097334d6 | 34 | #if !defined(_EFM32_GECKO_FAMILY) |
| Anna Bridge |
142:4eea097334d6 | 35 | #define ULFRCO 4 |
| Anna Bridge |
142:4eea097334d6 | 36 | #endif |
| Anna Bridge |
142:4eea097334d6 | 37 | |
| Anna Bridge |
142:4eea097334d6 | 38 | /* Low Energy peripheral clock source. |
| Anna Bridge |
142:4eea097334d6 | 39 | * Options: |
| Anna Bridge |
142:4eea097334d6 | 40 | * * LFXO: external crystal, please define frequency. |
| Anna Bridge |
142:4eea097334d6 | 41 | * * LFRCO: internal RC oscillator (32.768kHz) |
| Anna Bridge |
142:4eea097334d6 | 42 | * * ULFRCO: internal ultra-low power RC oscillator (available down to EM3) (1kHz) |
| Anna Bridge |
142:4eea097334d6 | 43 | */ |
| Anna Bridge |
142:4eea097334d6 | 44 | #ifndef LOW_ENERGY_CLOCK_SOURCE |
| Anna Bridge |
142:4eea097334d6 | 45 | #define LOW_ENERGY_CLOCK_SOURCE LFXO |
| Anna Bridge |
142:4eea097334d6 | 46 | #endif |
| Anna Bridge |
142:4eea097334d6 | 47 | |
| Anna Bridge |
142:4eea097334d6 | 48 | /** Core clock source. |
| Anna Bridge |
142:4eea097334d6 | 49 | * Options: |
| Anna Bridge |
142:4eea097334d6 | 50 | * * HFXO: external crystal, please define frequency. |
| Anna Bridge |
142:4eea097334d6 | 51 | * * HFRCO: High-frequency internal RC oscillator. Please select band as well. |
| Anna Bridge |
142:4eea097334d6 | 52 | */ |
| Anna Bridge |
142:4eea097334d6 | 53 | #ifndef CORE_CLOCK_SOURCE |
| Anna Bridge |
142:4eea097334d6 | 54 | #define CORE_CLOCK_SOURCE HFRCO |
| Anna Bridge |
142:4eea097334d6 | 55 | #if defined(_CMU_HFRCOCTRL_BAND_MASK) |
| AnnaBridge | 161:aa5281ff4a02 | 56 | #define HFRCO_FREQUENCY_ENUM _CMU_HFRCOCTRL_BAND_21MHZ |
| AnnaBridge | 161:aa5281ff4a02 | 57 | #define HFRCO_FREQUENCY 21000000 |
| Anna Bridge |
142:4eea097334d6 | 58 | #elif defined(_CMU_HFRCOCTRL_FREQRANGE_MASK) |
| Anna Bridge |
142:4eea097334d6 | 59 | #define HFRCO_FREQUENCY_ENUM cmuHFRCOFreq_32M0Hz |
| Anna Bridge |
142:4eea097334d6 | 60 | #define HFRCO_FREQUENCY 32000000 |
| Anna Bridge |
142:4eea097334d6 | 61 | #endif |
| Anna Bridge |
142:4eea097334d6 | 62 | #endif // CORE_CLOCK_SOURCE |
| Anna Bridge |
142:4eea097334d6 | 63 | |
| Anna Bridge |
142:4eea097334d6 | 64 | #if !defined(LFXO_FREQUENCY) && (LOW_ENERGY_CLOCK_SOURCE == LFXO) |
| Anna Bridge |
142:4eea097334d6 | 65 | #error "LFXO frequency is undefined!" |
| Anna Bridge |
142:4eea097334d6 | 66 | #endif |
| Anna Bridge |
142:4eea097334d6 | 67 | |
| Anna Bridge |
142:4eea097334d6 | 68 | #if !defined(HFXO_FREQUENCY) && (CORE_CLOCK_SOURCE == HFXO) |
| Anna Bridge |
142:4eea097334d6 | 69 | #error "HFXO frequency is undefined!" |
| Anna Bridge |
142:4eea097334d6 | 70 | #endif |
| Anna Bridge |
142:4eea097334d6 | 71 | |
| Anna Bridge |
142:4eea097334d6 | 72 | #if (LOW_ENERGY_CLOCK_SOURCE == LFXO) |
| Anna Bridge |
142:4eea097334d6 | 73 | #define LOW_ENERGY_CLOCK_FREQUENCY LFXO_FREQUENCY |
| Anna Bridge |
142:4eea097334d6 | 74 | #elif (LOW_ENERGY_CLOCK_SOURCE == LFRCO) |
| Anna Bridge |
142:4eea097334d6 | 75 | #define LOW_ENERGY_CLOCK_FREQUENCY 32768 |
| Anna Bridge |
142:4eea097334d6 | 76 | #elif (LOW_ENERGY_CLOCK_SOURCE == ULFRCO) |
| Anna Bridge |
142:4eea097334d6 | 77 | #define LOW_ENERGY_CLOCK_FREQUENCY 1000 |
| Anna Bridge |
142:4eea097334d6 | 78 | #else |
| Anna Bridge |
142:4eea097334d6 | 79 | #error "Unknown Low Energy Clock selection" |
| Anna Bridge |
142:4eea097334d6 | 80 | #endif |
| Anna Bridge |
142:4eea097334d6 | 81 | |
| Anna Bridge |
142:4eea097334d6 | 82 | #if( CORE_CLOCK_SOURCE == HFXO) |
| Anna Bridge |
142:4eea097334d6 | 83 | # define REFERENCE_FREQUENCY HFXO_FREQUENCY |
| Anna Bridge |
142:4eea097334d6 | 84 | #elif( CORE_CLOCK_SOURCE == HFRCO) |
| Anna Bridge |
142:4eea097334d6 | 85 | #if !defined(HFRCO_FREQUENCY) |
| Anna Bridge |
142:4eea097334d6 | 86 | # error "HFRCO frequency is not defined!" |
| Anna Bridge |
142:4eea097334d6 | 87 | #else |
| Anna Bridge |
142:4eea097334d6 | 88 | # define REFERENCE_FREQUENCY HFRCO_FREQUENCY |
| Anna Bridge |
142:4eea097334d6 | 89 | #endif |
| Anna Bridge |
142:4eea097334d6 | 90 | #endif |
| Anna Bridge |
142:4eea097334d6 | 91 | |
| Anna Bridge |
142:4eea097334d6 | 92 | #if ( LOW_ENERGY_CLOCK_SOURCE == LFXO ) |
| Anna Bridge |
142:4eea097334d6 | 93 | # define LEUART_USING_LFXO |
| Anna Bridge |
142:4eea097334d6 | 94 | # if ( (defined(CMU_CTRL_HFLE) || defined(CMU_CTRL_WSHFLE) ) && (REFERENCE_FREQUENCY > 24000000) ) |
| Anna Bridge |
142:4eea097334d6 | 95 | # define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 4) |
| Anna Bridge |
142:4eea097334d6 | 96 | # else |
| Anna Bridge |
142:4eea097334d6 | 97 | # define LEUART_HF_REF_FREQ (REFERENCE_FREQUENCY / 2) |
| Anna Bridge |
142:4eea097334d6 | 98 | # endif |
| Anna Bridge |
142:4eea097334d6 | 99 | # define LEUART_LF_REF_FREQ LFXO_FREQUENCY |
| Anna Bridge |
142:4eea097334d6 | 100 | #else |
| Anna Bridge |
142:4eea097334d6 | 101 | # if ( (defined(CMU_CTRL_HFLE) || defined(CMU_CTRL_WSHFLE) ) && (REFERENCE_FREQUENCY > 24000000) ) |
| Anna Bridge |
142:4eea097334d6 | 102 | # define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 4) |
| Anna Bridge |
142:4eea097334d6 | 103 | # else |
| Anna Bridge |
142:4eea097334d6 | 104 | # define LEUART_REF_FREQ (REFERENCE_FREQUENCY / 2) |
| Anna Bridge |
142:4eea097334d6 | 105 | # endif |
| Anna Bridge |
142:4eea097334d6 | 106 | #endif |
| Anna Bridge |
142:4eea097334d6 | 107 | |
| AnnaBridge | 161:aa5281ff4a02 | 108 | /* Adjust this to change speed of RTC and LP ticker ticks */ |
| Anna Bridge |
169:a7c7b631e539 | 109 | #define RTC_CLOCKDIV cmuClkDiv_1 |
| AnnaBridge | 161:aa5281ff4a02 | 110 | /* Adjust this to match RTC_CLOCKDIV as integer value */ |
| Anna Bridge |
169:a7c7b631e539 | 111 | #define RTC_CLOCKDIV_INT 1U |
| AnnaBridge | 161:aa5281ff4a02 | 112 | /* Adjust this to match RTC_CLOCKDIV as shift for 1 second worth of ticks. |
| AnnaBridge | 161:aa5281ff4a02 | 113 | * E.g. with 32768 Hz crystal and CLOCKDIV of 8, 1 second is 4096 ticks. |
| AnnaBridge | 161:aa5281ff4a02 | 114 | * 4096 equals 1 << 12, so RTC_FREQ_SHIFT needs to be 12. */ |
| Anna Bridge |
169:a7c7b631e539 | 115 | #define RTC_FREQ_SHIFT 15U |
| AnnaBridge | 161:aa5281ff4a02 | 116 | |
| Anna Bridge |
142:4eea097334d6 | 117 | #endif |
