micropython/ports/mimxrt/machine_rtc.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Damien P. George
* Copyright (c) 2021 "Robert Hammelrath" <robert@hammelrath.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/runtime.h"
#include "modmachine.h"
#include "ticks.h"
#include "fsl_snvs_lp.h"
typedef struct _machine_rtc_obj_t {
mp_obj_base_t base;
mp_obj_t callback;
} machine_rtc_obj_t;
// Singleton RTC object.
STATIC const machine_rtc_obj_t machine_rtc_obj = {{&machine_rtc_type}};
// Calculate the weekday from the date.
// The result is zero based with 0 = Sunday.
// by Michael Keith and Tom Craver, 1990.
static int calc_weekday(int y, int m, int d) {
return (d += m < 3 ? y-- : y - 2, 23 * m / 9 + d + 4 + y / 4 - y / 100 + y / 400) % 7;
}
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) {
// Check arguments.
mp_arg_check_num(n_args, n_kw, 0, 0, false);
// Start up the RTC if needed.
SNVS_LP_SRTC_StartTimer(SNVS);
// Return constant object.
return (mp_obj_t)&machine_rtc_obj;
}
STATIC mp_obj_t machine_rtc_datetime_helper(size_t n_args, const mp_obj_t *args) {
if (n_args == 1) {
// Get date and time.
snvs_lp_srtc_datetime_t srtc_date;
SNVS_LP_SRTC_GetDatetime(SNVS, &srtc_date);
mp_obj_t tuple[8] = {
mp_obj_new_int(srtc_date.year),
mp_obj_new_int(srtc_date.month),
mp_obj_new_int(srtc_date.day),
mp_obj_new_int(srtc_date.hour),
mp_obj_new_int(srtc_date.minute),
mp_obj_new_int(srtc_date.second),
mp_obj_new_int(ticks_us64() % 1000000),
mp_const_none,
};
return mp_obj_new_tuple(8, tuple);
} else {
// Set date and time.
mp_obj_t *items;
mp_int_t year;
mp_obj_get_array_fixed_n(args[1], 8, &items);
snvs_lp_srtc_datetime_t srtc_date;
year = mp_obj_get_int(items[0]);
srtc_date.year = year >= 100 ? year : year + 2000; // allow 21 for 2021
srtc_date.month = mp_obj_get_int(items[1]);
srtc_date.day = mp_obj_get_int(items[2]);
srtc_date.hour = mp_obj_get_int(items[3]);
srtc_date.minute = mp_obj_get_int(items[4]);
srtc_date.second = mp_obj_get_int(items[5]);
if (SNVS_LP_SRTC_SetDatetime(SNVS, &srtc_date) != kStatus_Success) {
mp_raise_ValueError(NULL);
}
return mp_const_none;
}
}
STATIC mp_obj_t machine_rtc_datetime(mp_uint_t n_args, const mp_obj_t *args) {
return machine_rtc_datetime_helper(n_args, args);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_rtc_datetime_obj, 1, 2, machine_rtc_datetime);
STATIC mp_obj_t machine_rtc_now(mp_obj_t self_in) {
return machine_rtc_datetime_helper(1, &self_in);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_rtc_now_obj, machine_rtc_now);
STATIC mp_obj_t machine_rtc_init(mp_obj_t self_in, mp_obj_t date) {
mp_obj_t args[2] = {self_in, date};
machine_rtc_datetime_helper(2, args);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_rtc_init_obj, machine_rtc_init);
STATIC mp_obj_t machine_rtc_weekday(mp_obj_t self_in) {
(void)self_in; // unused
int day;
snvs_lp_srtc_datetime_t srtc_date;
SNVS_LP_SRTC_GetDatetime(SNVS, &srtc_date);
day = calc_weekday(srtc_date.year, srtc_date.month, srtc_date.day);
return MP_OBJ_NEW_SMALL_INT((day + 6) % 7);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_rtc_weekday_obj, machine_rtc_weekday);
// calibration(cal)
// When the argument is a number in the range [-16 to 15], set the calibration value.
STATIC mp_obj_t machine_rtc_calibration(mp_obj_t self_in, mp_obj_t cal_in) {
mp_int_t cal = 0;
snvs_lp_srtc_config_t snvsSrtcConfig;
cal = mp_obj_get_int(cal_in);
if (cal < -16 || cal > 15) {
mp_raise_ValueError(MP_ERROR_TEXT("value out of range -16 to 15"));
} else {
snvsSrtcConfig.srtcCalEnable = true;
snvsSrtcConfig.srtcCalValue = cal & 0x1f; // 5 bit 2's complement
SNVS_LP_SRTC_Init(SNVS, &snvsSrtcConfig);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_rtc_calibration_obj, machine_rtc_calibration);
STATIC const mp_rom_map_elem_t machine_rtc_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_rtc_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_datetime), MP_ROM_PTR(&machine_rtc_datetime_obj) },
{ MP_ROM_QSTR(MP_QSTR_now), MP_ROM_PTR(&machine_rtc_now_obj) },
{ MP_ROM_QSTR(MP_QSTR_weekday), MP_ROM_PTR(&machine_rtc_weekday_obj) },
{ MP_ROM_QSTR(MP_QSTR_calibration), MP_ROM_PTR(&machine_rtc_calibration_obj) },
};
STATIC MP_DEFINE_CONST_DICT(machine_rtc_locals_dict, machine_rtc_locals_dict_table);
const mp_obj_type_t machine_rtc_type = {
{ &mp_type_type },
.name = MP_QSTR_RTC,
.make_new = machine_rtc_make_new,
.locals_dict = (mp_obj_t)&machine_rtc_locals_dict,
};