106 lines
3.5 KiB
C
106 lines
3.5 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) 2018 Noralf Trønnes
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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 <stdlib.h>
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#include <peripheral_clk_config.h>
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#include <hal_init.h>
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#include <hpl_gclk_base.h>
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#include <hpl_pm_base.h>
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#include <hal_calendar.h>
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "lib/timeutils/timeutils.h"
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#include "shared-bindings/rtc/__init__.h"
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#include "supervisor/shared/translate.h"
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static struct calendar_descriptor calendar;
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void rtc_init(void) {
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#ifdef SAMD21
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_gclk_enable_channel(RTC_GCLK_ID, CONF_GCLK_RTC_SRC);
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#endif
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#ifdef SAMD51
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hri_mclk_set_APBAMASK_RTC_bit(MCLK);
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#endif
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calendar_init(&calendar, RTC);
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calendar_set_baseyear(&calendar, 2000);
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calendar_enable(&calendar);
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}
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void common_hal_rtc_get_time(timeutils_struct_time_t *tm) {
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struct calendar_date_time datetime;
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calendar_get_date_time(&calendar, &datetime);
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tm->tm_year = datetime.date.year;
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tm->tm_mon = datetime.date.month;
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tm->tm_mday = datetime.date.day;
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tm->tm_hour = datetime.time.hour;
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tm->tm_min = datetime.time.min;
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tm->tm_sec = datetime.time.sec;
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}
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void common_hal_rtc_set_time(timeutils_struct_time_t *tm) {
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// Reset prescaler to increase initial precision. Otherwise we can be up to 1 second off already.
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uint32_t freqcorr = hri_rtcmode0_read_FREQCORR_reg(calendar.device.hw);
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calendar_deinit(&calendar);
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rtc_init();
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hri_rtcmode0_write_FREQCORR_reg(calendar.device.hw, freqcorr);
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struct calendar_date date = {
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.year = tm->tm_year,
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.month = tm->tm_mon,
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.day = tm->tm_mday,
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};
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calendar_set_date(&calendar, &date);
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struct calendar_time time = {
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.hour = tm->tm_hour,
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.min = tm->tm_min,
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.sec = tm->tm_sec,
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};
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calendar_set_time(&calendar, &time);
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}
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// A positive value speeds up the clock by removing clock cycles.
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int common_hal_rtc_get_calibration(void) {
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int calibration = hri_rtcmode0_read_FREQCORR_VALUE_bf(calendar.device.hw);
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if (!hri_rtcmode0_get_FREQCORR_SIGN_bit(calendar.device.hw))
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calibration = -calibration;
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return calibration;
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}
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void common_hal_rtc_set_calibration(int calibration) {
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if (calibration > 127 || calibration < -127)
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mp_raise_ValueError(translate("calibration value out of range +/-127"));
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hri_rtcmode0_write_FREQCORR_SIGN_bit(calendar.device.hw, calibration < 0 ? 0 : 1);
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hri_rtcmode0_write_FREQCORR_VALUE_bf(calendar.device.hw, abs(calibration));
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}
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