76 lines
2.8 KiB
C
76 lines
2.8 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 "py/obj.h"
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#include "py/runtime.h"
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#include "shared/timeutils/timeutils.h"
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#include "shared-bindings/rtc/__init__.h"
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#include "shared-bindings/rtc/RTC.h"
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#include "supervisor/port.h"
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#include "supervisor/shared/translate/translate.h"
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// This is the time in seconds since 2000 that the RTC was started.
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// TODO: Change the offset to ticks so that it can be a subsecond adjustment.
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static uint32_t rtc_offset = 0;
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void common_hal_rtc_get_time(timeutils_struct_time_t *tm) {
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uint64_t ticks_s = port_get_raw_ticks(NULL) / 1024;
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timeutils_seconds_since_2000_to_struct_time(rtc_offset + ticks_s, tm);
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}
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void common_hal_rtc_set_time(timeutils_struct_time_t *tm) {
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uint64_t ticks_s = port_get_raw_ticks(NULL) / 1024;
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uint32_t epoch_s = timeutils_seconds_since_2000(
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tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec
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);
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rtc_offset = epoch_s - ticks_s;
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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(RTC);
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if (!hri_rtcmode0_get_FREQCORR_SIGN_bit(RTC)) {
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calibration = -calibration;
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}
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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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mp_arg_validate_int_range(calibration, -127, 127, MP_QSTR_calibration);
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hri_rtcmode0_write_FREQCORR_SIGN_bit(RTC, calibration < 0 ? 0 : 1);
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hri_rtcmode0_write_FREQCORR_VALUE_bf(RTC, abs(calibration));
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}
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