182 lines
6.3 KiB
C
182 lines
6.3 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) 2021 Damien P. George
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* Copyright (c) 2022 "Robert Hammelrath" <robert@hammelrath.com>
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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 "py/runtime.h"
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#include "shared/timeutils/timeutils.h"
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#include "py/mphal.h"
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#include "extmod/modmachine.h"
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#include "sam.h"
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#if MICROPY_PY_MACHINE_RTC
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typedef struct _machine_rtc_obj_t {
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mp_obj_base_t base;
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mp_obj_t callback;
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} machine_rtc_obj_t;
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// Singleton RTC object.
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STATIC const machine_rtc_obj_t machine_rtc_obj = {{&machine_rtc_type}};
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// Start the RTC Timer.
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void machine_rtc_start(bool force) {
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#if defined(MCU_SAMD21)
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if (RTC->MODE2.CTRL.bit.ENABLE == 0 || force) {
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// Enable the 1k Clock
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GCLK->CLKCTRL.reg = GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK8 | GCLK_CLKCTRL_ID_RTC;
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RTC->MODE2.CTRL.reg = RTC_MODE2_CTRL_SWRST;
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while (RTC->MODE2.STATUS.bit.SYNCBUSY) {
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}
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RTC->MODE2.CTRL.reg =
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RTC_MODE2_CTRL_MODE_CLOCK |
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RTC_MODE2_CTRL_PRESCALER_DIV1024 |
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RTC_MODE2_CTRL_ENABLE;
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while (RTC->MODE2.STATUS.bit.SYNCBUSY) {
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}
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}
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#elif defined(MCU_SAMD51)
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if (RTC->MODE2.CTRLA.bit.ENABLE == 0 || force) {
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RTC->MODE2.CTRLA.reg = RTC_MODE2_CTRLA_SWRST;
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while (RTC->MODE2.SYNCBUSY.bit.SWRST) {
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}
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RTC->MODE2.CTRLA.reg =
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RTC_MODE2_CTRLA_MODE_CLOCK |
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RTC_MODE2_CTRLA_CLOCKSYNC |
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RTC_MODE2_CTRLA_PRESCALER_DIV1024 |
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RTC_MODE2_CTRLA_ENABLE;
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while (RTC->MODE2.SYNCBUSY.bit.ENABLE) {
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}
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}
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#endif
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}
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// Get the time from the RTC and put it into a tm struct.
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void rtc_gettime(timeutils_struct_time_t *tm) {
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tm->tm_year = RTC->MODE2.CLOCK.bit.YEAR + 2000;
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tm->tm_mon = RTC->MODE2.CLOCK.bit.MONTH;
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tm->tm_mday = RTC->MODE2.CLOCK.bit.DAY;
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tm->tm_hour = RTC->MODE2.CLOCK.bit.HOUR;
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tm->tm_min = RTC->MODE2.CLOCK.bit.MINUTE;
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tm->tm_sec = RTC->MODE2.CLOCK.bit.SECOND;
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}
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STATIC mp_obj_t machine_rtc_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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// Check arguments.
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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// RTC was already started at boot time. So nothing to do here.
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// Return constant object.
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return (mp_obj_t)&machine_rtc_obj;
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}
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STATIC mp_obj_t machine_rtc_datetime_helper(size_t n_args, const mp_obj_t *args) {
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// Rtc *rtc = RTC;
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if (n_args == 1) {
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// Get date and time.
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timeutils_struct_time_t tm;
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rtc_gettime(&tm);
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mp_obj_t tuple[8] = {
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mp_obj_new_int(tm.tm_year),
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mp_obj_new_int(tm.tm_mon),
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mp_obj_new_int(tm.tm_mday),
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mp_obj_new_int(timeutils_calc_weekday(tm.tm_year, tm.tm_mon, tm.tm_mday)),
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mp_obj_new_int(tm.tm_hour),
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mp_obj_new_int(tm.tm_min),
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mp_obj_new_int(tm.tm_sec),
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mp_obj_new_int(0),
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};
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return mp_obj_new_tuple(8, tuple);
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} else {
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// Set date and time.
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mp_obj_t *items;
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mp_obj_get_array_fixed_n(args[1], 8, &items);
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uint32_t date =
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RTC_MODE2_CLOCK_YEAR(mp_obj_get_int(items[0]) % 100) |
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RTC_MODE2_CLOCK_MONTH(mp_obj_get_int(items[1])) |
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RTC_MODE2_CLOCK_DAY(mp_obj_get_int(items[2])) |
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RTC_MODE2_CLOCK_HOUR(mp_obj_get_int(items[4])) |
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RTC_MODE2_CLOCK_MINUTE(mp_obj_get_int(items[5])) |
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RTC_MODE2_CLOCK_SECOND(mp_obj_get_int(items[6]));
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RTC->MODE2.CLOCK.reg = date;
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#if defined(MCU_SAMD21)
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while (RTC->MODE2.STATUS.bit.SYNCBUSY) {
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}
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#elif defined(MCU_SAMD51)
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while (RTC->MODE2.SYNCBUSY.bit.CLOCKSYNC) {
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}
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#endif
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return mp_const_none;
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}
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}
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STATIC mp_obj_t machine_rtc_datetime(mp_uint_t n_args, const mp_obj_t *args) {
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return machine_rtc_datetime_helper(n_args, args);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_rtc_datetime_obj, 1, 2, machine_rtc_datetime);
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STATIC mp_obj_t machine_rtc_init(mp_obj_t self_in, mp_obj_t date) {
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mp_obj_t args[2] = {self_in, date};
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machine_rtc_datetime_helper(2, args);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_rtc_init_obj, machine_rtc_init);
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// calibration(cal)
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// When the argument is a number in the range [-16 to 15], set the calibration value.
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STATIC mp_obj_t machine_rtc_calibration(mp_obj_t self_in, mp_obj_t cal_in) {
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int8_t cal = 0;
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// Make it negative for a "natural" behavior:
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// value > 0: faster, value < 0: slower
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cal = -mp_obj_get_int(cal_in);
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RTC->MODE2.FREQCORR.reg = (uint8_t)cal;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_rtc_calibration_obj, machine_rtc_calibration);
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STATIC const mp_rom_map_elem_t machine_rtc_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_rtc_init_obj) },
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{ MP_ROM_QSTR(MP_QSTR_datetime), MP_ROM_PTR(&machine_rtc_datetime_obj) },
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{ MP_ROM_QSTR(MP_QSTR_calibration), MP_ROM_PTR(&machine_rtc_calibration_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(machine_rtc_locals_dict, machine_rtc_locals_dict_table);
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MP_DEFINE_CONST_OBJ_TYPE(
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machine_rtc_type,
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MP_QSTR_RTC,
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MP_TYPE_FLAG_NONE,
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make_new, machine_rtc_make_new,
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locals_dict, &machine_rtc_locals_dict
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);
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#endif // MICROPY_PY_MACHINE_RTC
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