354 lines
12 KiB
C
354 lines
12 KiB
C
/*
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* This file is part of the Micro Python 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) 2013, 2014 Damien P. George
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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 <stdio.h>
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#include <string.h>
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#include "stm32f4xx_hal.h"
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#include "mpconfig.h"
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#include "nlr.h"
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#include "misc.h"
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#include "qstr.h"
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#include "obj.h"
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#include "portmodules.h"
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#include "rtc.h"
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/// \module time - time related functions
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///
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/// The `time` module provides functions for getting the current time and date,
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/// and for sleeping.
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STATIC const uint16_t days_since_jan1[]= { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
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STATIC bool is_leap_year(mp_uint_t year) {
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return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
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}
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// Month is one based
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STATIC mp_uint_t mod_time_days_in_month(mp_uint_t year, mp_uint_t month) {
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mp_uint_t mdays = days_since_jan1[month] - days_since_jan1[month - 1];
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if (month == 2 && is_leap_year(year)) {
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mdays++;
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}
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return mdays;
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}
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// compute the day of the year, between 1 and 366
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// month should be between 1 and 12, date should start at 1
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STATIC mp_uint_t mod_time_year_day(mp_uint_t year, mp_uint_t month, mp_uint_t date) {
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mp_uint_t yday = days_since_jan1[month - 1] + date;
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if (month >= 3 && is_leap_year(year)) {
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yday += 1;
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}
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return yday;
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}
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// returns the number of seconds, as an integer, since 2000-01-01
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mp_uint_t mod_time_seconds_since_2000(mp_uint_t year, mp_uint_t month, mp_uint_t date, mp_uint_t hour, mp_uint_t minute, mp_uint_t second) {
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return
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second
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+ minute * 60
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+ hour * 3600
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+ (mod_time_year_day(year, month, date) - 1
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+ ((year - 2000 + 3) / 4) // add a day each 4 years starting with 2001
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- ((year - 2000 + 99) / 100) // subtract a day each 100 years starting with 2001
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+ ((year - 2000 + 399) / 400) // add a day each 400 years starting with 2001
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) * 86400
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+ (year - 2000) * 31536000;
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}
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// LEAPOCH corresponds to 2000-03-01, which is a mod-400 year, immediately
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// after Feb 29. We calculate seconds as a signed integer relative to that.
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//
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// Our timebase is is relative to 2000-01-01.
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#define LEAPOCH ((31 + 29) * 86400)
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#define DAYS_PER_400Y (365*400 + 97)
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#define DAYS_PER_100Y (365*100 + 24)
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#define DAYS_PER_4Y (365*4 + 1)
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typedef struct {
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uint16_t tm_year; // i.e. 2014
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uint8_t tm_mon; // 1..12
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uint8_t tm_mday; // 1..31
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uint8_t tm_hour; // 0..23
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uint8_t tm_min; // 0..59
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uint8_t tm_sec; // 0..59
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uint8_t tm_wday; // 0..6 0 = Monday
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uint16_t tm_yday; // 1..366
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} mod_struct_time;
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STATIC void mod_time_seconds_since_2000_to_struct_time(mp_uint_t t, mod_struct_time *tm) {
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// The following algorithm was adapted from musl's __secs_to_tm and adapted
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// for differences in Micro Python's timebase.
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mp_int_t seconds = t - LEAPOCH;
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mp_int_t days = seconds / 86400;
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seconds %= 86400;
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tm->tm_hour = seconds / 3600;
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tm->tm_min = seconds / 60 % 60;
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tm->tm_sec = seconds % 60;
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mp_int_t wday = (days + 2) % 7; // Mar 1, 2000 was a Wednesday (2)
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if (wday < 0) {
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wday += 7;
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}
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tm->tm_wday = wday;
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mp_int_t qc_cycles = days / DAYS_PER_400Y;
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days %= DAYS_PER_400Y;
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if (days < 0) {
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days += DAYS_PER_400Y;
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qc_cycles--;
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}
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mp_int_t c_cycles = days / DAYS_PER_100Y;
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if (c_cycles == 4) {
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c_cycles--;
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}
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days -= (c_cycles * DAYS_PER_100Y);
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mp_int_t q_cycles = days / DAYS_PER_4Y;
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if (q_cycles == 25) {
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q_cycles--;
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}
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days -= q_cycles * DAYS_PER_4Y;
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mp_int_t years = days / 365;
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if (years == 4) {
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years--;
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}
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days -= (years * 365);
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/* We will compute tm_yday at the very end
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mp_int_t leap = !years && (q_cycles || !c_cycles);
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tm->tm_yday = days + 31 + 28 + leap;
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if (tm->tm_yday >= 365 + leap) {
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tm->tm_yday -= 365 + leap;
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}
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tm->tm_yday++; // Make one based
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*/
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tm->tm_year = 2000 + years + 4 * q_cycles + 100 * c_cycles + 400 * qc_cycles;
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// Note: days_in_month[0] corresponds to March
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STATIC const int8_t days_in_month[] = {31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31, 29};
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mp_int_t month;
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for (month = 0; days_in_month[month] <= days; month++) {
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days -= days_in_month[month];
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}
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tm->tm_mon = month + 2;
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if (tm->tm_mon >= 12) {
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tm->tm_mon -= 12;
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tm->tm_year++;
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}
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tm->tm_mday = days + 1; // Make one based
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tm->tm_mon++; // Make one based
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tm->tm_yday = mod_time_year_day(tm->tm_year, tm->tm_mon, tm->tm_mday);
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}
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/// \function localtime([secs])
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/// Convert a time expressed in seconds since Jan 1, 2000 into an 8-tuple which
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/// contains: (year, month, mday, hour, minute, second, weekday, yearday)
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/// If secs is not provided or None, then the current time from the RTC is used.
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/// year includes the century (for example 2014)
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/// month is 1-12
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/// mday is 1-31
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/// hour is 0-23
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/// minute is 0-59
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/// second is 0-59
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/// weekday is 0-6 for Mon-Sun.
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/// yearday is 1-366
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STATIC mp_obj_t time_localtime(mp_uint_t n_args, const mp_obj_t *args) {
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if (n_args == 0 || args[0] == mp_const_none) {
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// get current date and time
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// note: need to call get time then get date to correctly access the registers
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RTC_DateTypeDef date;
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RTC_TimeTypeDef time;
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HAL_RTC_GetTime(&RTCHandle, &time, FORMAT_BIN);
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HAL_RTC_GetDate(&RTCHandle, &date, FORMAT_BIN);
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mp_obj_t tuple[8] = {
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mp_obj_new_int(2000 + date.Year),
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mp_obj_new_int(date.Month),
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mp_obj_new_int(date.Date),
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mp_obj_new_int(time.Hours),
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mp_obj_new_int(time.Minutes),
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mp_obj_new_int(time.Seconds),
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mp_obj_new_int(date.WeekDay - 1),
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mp_obj_new_int(mod_time_year_day(2000 + date.Year, date.Month, date.Date)),
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};
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return mp_obj_new_tuple(8, tuple);
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} else {
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mp_int_t seconds = mp_obj_get_int(args[0]);
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mod_struct_time tm;
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mod_time_seconds_since_2000_to_struct_time(seconds, &tm);
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mp_obj_t tuple[8] = {
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tuple[0] = mp_obj_new_int(tm.tm_year),
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tuple[1] = mp_obj_new_int(tm.tm_mon),
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tuple[2] = mp_obj_new_int(tm.tm_mday),
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tuple[3] = mp_obj_new_int(tm.tm_hour),
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tuple[4] = mp_obj_new_int(tm.tm_min),
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tuple[5] = mp_obj_new_int(tm.tm_sec),
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tuple[6] = mp_obj_new_int(tm.tm_wday),
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tuple[7] = mp_obj_new_int(tm.tm_yday),
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};
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return mp_obj_new_tuple(8, tuple);
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}
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(time_localtime_obj, 0, 1, time_localtime);
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/// \function mktime()
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/// This is inverse function of localtime. It's argument is a full 8-tuple
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/// which expresses a time as per localtime. It returns an integer which is
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/// the number of seconds since Jan 1, 2000.
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STATIC mp_obj_t time_mktime(mp_obj_t tuple) {
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mp_uint_t len;
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mp_obj_t *elem;
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mp_obj_get_array(tuple, &len, &elem);
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// localtime generates a tuple of len 8. CPython uses 9, so we accept both.
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if (len < 8 || len > 9) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "mktime needs a tuple of length 8 or 9 (%d given)", len));
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}
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mp_int_t year = mp_obj_get_int(elem[0]);
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mp_int_t month = mp_obj_get_int(elem[1]);
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mp_int_t mday = mp_obj_get_int(elem[2]);
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mp_int_t hours = mp_obj_get_int(elem[3]);
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mp_int_t minutes = mp_obj_get_int(elem[4]);
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mp_int_t seconds = mp_obj_get_int(elem[5]);
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// Normalise the tuple. This allows things like:
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//
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// tm_tomorrow = list(time.localtime())
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// tm_tomorrow[2] += 1 # Adds 1 to mday
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// tomorrow = time.mktime(tm_tommorrow)
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//
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// And not have to worry about all the weird overflows.
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//
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// You can subtract dates/times this way as well.
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minutes += seconds / 60;
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if ((seconds = seconds % 60) < 0) {
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seconds += 60;
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minutes--;
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}
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hours += minutes / 60;
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if ((minutes = minutes % 60) < 0) {
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minutes += 60;
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hours--;
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}
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mday += hours / 24;
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if ((hours = hours % 24) < 0) {
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hours += 24;
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mday--;
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}
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month--; // make month zero based
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year += month / 12;
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if ((month = month % 12) < 0) {
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month += 12;
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year--;
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}
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month++; // back to one based
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while (mday < 1) {
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if (--month == 0) {
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month = 12;
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year--;
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}
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mday += mod_time_days_in_month(year, month);
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}
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while (mday > mod_time_days_in_month(year, month)) {
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mday -= mod_time_days_in_month(year, month);
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if (++month == 13) {
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month = 1;
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year++;
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}
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}
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return mp_obj_new_int_from_uint(mod_time_seconds_since_2000(year, month, mday, hours, minutes, seconds));
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}
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MP_DEFINE_CONST_FUN_OBJ_1(time_mktime_obj, time_mktime);
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/// \function sleep(seconds)
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/// Sleep for the given number of seconds. Seconds can be a floating-point number to
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/// sleep for a fractional number of seconds.
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STATIC mp_obj_t time_sleep(mp_obj_t seconds_o) {
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#if MICROPY_PY_BUILTINS_FLOAT
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if (MP_OBJ_IS_INT(seconds_o)) {
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#endif
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HAL_Delay(1000 * mp_obj_get_int(seconds_o));
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#if MICROPY_PY_BUILTINS_FLOAT
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} else {
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HAL_Delay((uint32_t)(1000 * mp_obj_get_float(seconds_o)));
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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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MP_DEFINE_CONST_FUN_OBJ_1(time_sleep_obj, time_sleep);
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/// \function time()
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/// Returns the number of seconds, as an integer, since 1/1/2000.
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STATIC mp_obj_t time_time(void) {
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// get date and time
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// note: need to call get time then get date to correctly access the registers
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RTC_DateTypeDef date;
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RTC_TimeTypeDef time;
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HAL_RTC_GetTime(&RTCHandle, &time, FORMAT_BIN);
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HAL_RTC_GetDate(&RTCHandle, &date, FORMAT_BIN);
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return mp_obj_new_int(mod_time_seconds_since_2000(2000 + date.Year, date.Month, date.Date, time.Hours, time.Minutes, time.Seconds));
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}
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MP_DEFINE_CONST_FUN_OBJ_0(time_time_obj, time_time);
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STATIC const mp_map_elem_t time_module_globals_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_utime) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_localtime), (mp_obj_t)&time_localtime_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_mktime), (mp_obj_t)&time_mktime_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_sleep), (mp_obj_t)&time_sleep_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&time_time_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(time_module_globals, time_module_globals_table);
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const mp_obj_module_t mp_module_utime = {
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.base = { &mp_type_module },
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.name = MP_QSTR_utime,
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.globals = (mp_obj_dict_t*)&time_module_globals,
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};
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