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/TARGET_EFM32ZG_STK3200/device_peripherals.h@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 2 * @file device_peripheral.h
<> 144:ef7eb2e8f9f7 3 *******************************************************************************
<> 144:ef7eb2e8f9f7 4 * @section License
<> 144:ef7eb2e8f9f7 5 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
<> 144:ef7eb2e8f9f7 6 *******************************************************************************
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * SPDX-License-Identifier: Apache-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Licensed under the Apache License, Version 2.0 (the "License"); you may
<> 144:ef7eb2e8f9f7 11 * not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 12 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 15 *
<> 144:ef7eb2e8f9f7 16 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 17 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
<> 144:ef7eb2e8f9f7 18 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 19 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 20 * limitations under the License.
<> 144:ef7eb2e8f9f7 21 *
<> 144:ef7eb2e8f9f7 22 ******************************************************************************/
<> 144:ef7eb2e8f9f7 23 #ifndef MBED_DEVICE_PERIPHERALS_H
<> 144:ef7eb2e8f9f7 24 #define MBED_DEVICE_PERIPHERALS_H
<> 144:ef7eb2e8f9f7 25
<> 144:ef7eb2e8f9f7 26 /* us ticker */
<> 144:ef7eb2e8f9f7 27 #define US_TICKER_TIMER TIMER1
<> 144:ef7eb2e8f9f7 28 #define US_TICKER_TIMER_CLOCK cmuClock_TIMER1
<> 144:ef7eb2e8f9f7 29 #define US_TICKER_TIMER_IRQ TIMER1_IRQn
<> 144:ef7eb2e8f9f7 30
<> 144:ef7eb2e8f9f7 31 /* PWM */
<> 144:ef7eb2e8f9f7 32 #define PWM_TIMER TIMER0
<> 144:ef7eb2e8f9f7 33 #define PWM_TIMER_CLOCK cmuClock_TIMER0
<> 144:ef7eb2e8f9f7 34 #define PWM_ROUTE TIMER_ROUTE_LOCATION_LOC0
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 /* Clocks */
<> 144:ef7eb2e8f9f7 37
<> 144:ef7eb2e8f9f7 38 /* Clock definitions */
<> 144:ef7eb2e8f9f7 39 #define LFXO 0
<> 144:ef7eb2e8f9f7 40 #define HFXO 1
<> 144:ef7eb2e8f9f7 41 #define LFRCO 2
<> 144:ef7eb2e8f9f7 42 #define HFRCO 3
<> 144:ef7eb2e8f9f7 43 #if !defined(_EFM32_GECKO_FAMILY)
<> 144:ef7eb2e8f9f7 44 #define ULFRCO 4
<> 144:ef7eb2e8f9f7 45 #endif
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 /* Low Energy peripheral clock source.
<> 144:ef7eb2e8f9f7 48 * Options:
<> 144:ef7eb2e8f9f7 49 * * LFXO: external crystal, please define frequency.
<> 144:ef7eb2e8f9f7 50 * * LFRCO: internal RC oscillator (32.768kHz)
<> 144:ef7eb2e8f9f7 51 * * ULFRCO: internal ultra-low power RC oscillator (available down to EM3) (1kHz)
<> 144:ef7eb2e8f9f7 52 */
<> 144:ef7eb2e8f9f7 53 #define LOW_ENERGY_CLOCK_SOURCE LFXO
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 /** Core clock source.
<> 144:ef7eb2e8f9f7 56 * Options:
<> 144:ef7eb2e8f9f7 57 * * HFXO: external crystal, please define frequency.
<> 144:ef7eb2e8f9f7 58 * * HFRCO: High-frequency internal RC oscillator. Please select band as well.
<> 144:ef7eb2e8f9f7 59 */
<> 144:ef7eb2e8f9f7 60 #define CORE_CLOCK_SOURCE HFXO
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 /** HFRCO frequency band
<> 144:ef7eb2e8f9f7 63 * Options:
<> 144:ef7eb2e8f9f7 64 * * _CMU_HFRCOCTRL_BAND_21MHZ
<> 144:ef7eb2e8f9f7 65 * * _CMU_HFRCOCTRL_BAND_14MHZ
<> 144:ef7eb2e8f9f7 66 * * _CMU_HFRCOCTRL_BAND_11MHZ
<> 144:ef7eb2e8f9f7 67 * * _CMU_HFRCOCTRL_BAND_7MHZ
<> 144:ef7eb2e8f9f7 68 * * _CMU_HFRCOCTRL_BAND_1MHZ
<> 144:ef7eb2e8f9f7 69 */
<> 144:ef7eb2e8f9f7 70 #define HFRCO_FREQUENCY _CMU_HFRCOCTRL_BAND_21MHZ
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 #define LFXO_FREQUENCY 32768
<> 144:ef7eb2e8f9f7 73 #define HFXO_FREQUENCY 24000000
<> 144:ef7eb2e8f9f7 74
<> 144:ef7eb2e8f9f7 75 #if (LOW_ENERGY_CLOCK_SOURCE == LFXO)
<> 144:ef7eb2e8f9f7 76 #define LOW_ENERGY_CLOCK_FREQUENCY LFXO_FREQUENCY
<> 144:ef7eb2e8f9f7 77 #elif (LOW_ENERGY_CLOCK_SOURCE == LFRCO)
<> 144:ef7eb2e8f9f7 78 #define LOW_ENERGY_CLOCK_FREQUENCY 32768
<> 144:ef7eb2e8f9f7 79 #elif (LOW_ENERGY_CLOCK_SOURCE == ULFRCO)
<> 144:ef7eb2e8f9f7 80 #define LOW_ENERGY_CLOCK_FREQUENCY 1000
<> 144:ef7eb2e8f9f7 81 #else
<> 144:ef7eb2e8f9f7 82 #error "Unknown Low Energy Clock selection"
<> 144:ef7eb2e8f9f7 83 #endif
<> 144:ef7eb2e8f9f7 84
<> 144:ef7eb2e8f9f7 85 #endif