124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Glenn Ruben Bakke
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "mphalport.h"
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#include "hal_rtc.h"
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#include "hal_irq.h"
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#ifdef HAL_RTC_MODULE_ENABLED
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#define HAL_LFCLK_FREQ (32768UL)
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#define HAL_RTC_FREQ (10UL)
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#define HAL_RTC_COUNTER_PRESCALER ((HAL_LFCLK_FREQ/HAL_RTC_FREQ)-1)
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static hal_rtc_app_callback m_callback;
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static uint32_t m_period[sizeof(RTC_BASE_POINTERS) / sizeof(uint32_t)];
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void hal_rtc_callback_set(hal_rtc_app_callback callback) {
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m_callback = callback;
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}
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void hal_rtc_init(hal_rtc_conf_t const * p_rtc_conf) {
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NRF_RTC_Type * p_rtc = RTC_BASE(p_rtc_conf->id);
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// start LFCLK if not already started
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if (NRF_CLOCK->LFCLKSTAT == 0) {
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NRF_CLOCK->TASKS_LFCLKSTART = 1;
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while (NRF_CLOCK->EVENTS_LFCLKSTARTED == 0);
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NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
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}
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m_period[p_rtc_conf->id] = p_rtc_conf->period;
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p_rtc->PRESCALER = HAL_RTC_COUNTER_PRESCALER;
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hal_irq_priority(RTC_IRQ_NUM(p_rtc_conf->id), p_rtc_conf->irq_priority);
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}
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void hal_rtc_start(uint8_t id) {
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NRF_RTC_Type * p_rtc = RTC_BASE(id);
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uint32_t period = HAL_RTC_FREQ * m_period[id];
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uint32_t counter = p_rtc->COUNTER;
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p_rtc->CC[0] = counter + period;
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p_rtc->EVTENSET = RTC_EVTEN_COMPARE0_Msk;
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p_rtc->INTENSET = RTC_INTENSET_COMPARE0_Msk;
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hal_irq_clear(RTC_IRQ_NUM(id));
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hal_irq_enable(RTC_IRQ_NUM(id));
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p_rtc->TASKS_START = 1;
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}
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void hal_rtc_stop(uint8_t id) {
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NRF_RTC_Type * p_rtc = RTC_BASE(id);
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p_rtc->EVTENCLR = RTC_EVTEN_COMPARE0_Msk;
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p_rtc->INTENCLR = RTC_INTENSET_COMPARE0_Msk;
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hal_irq_disable(RTC_IRQ_NUM(id));
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p_rtc->TASKS_STOP = 1;
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}
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static void common_irq_handler(uint8_t id) {
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NRF_RTC_Type * p_rtc = RTC_BASE(id);
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// clear all events
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p_rtc->EVENTS_COMPARE[0] = 0;
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p_rtc->EVENTS_COMPARE[1] = 0;
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p_rtc->EVENTS_COMPARE[2] = 0;
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p_rtc->EVENTS_COMPARE[3] = 0;
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p_rtc->EVENTS_TICK = 0;
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p_rtc->EVENTS_OVRFLW = 0;
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m_callback(id);
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}
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void RTC0_IRQHandler(void)
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{
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common_irq_handler(0);
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}
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void RTC1_IRQHandler(void)
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{
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common_irq_handler(1);
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}
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#if NRF52
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void RTC2_IRQHandler(void)
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{
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common_irq_handler(2);
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}
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#endif // NRF52
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#endif // HAL_RTC_MODULE_ENABLED
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