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bring mars time into Second Movement

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Joey Castillo
2025-05-27 19:30:54 -04:00
parent 69b8048790
commit e9811a518a
4 changed files with 19 additions and 16 deletions
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166
watch-faces/clock/mars_time_face.c Normal file
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/*
* MIT License
*
* Copyright (c) 2022 Joey Castillo
*
* 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 <stdlib.h>
#include <string.h>
#include <math.h>
#include "watch_utility.h"
#include "mars_time_face.h"
// note: lander coordinates come from Mars24's `marslandmarks.xml` file
static double site_longitudes[MARS_TIME_NUM_SITES] = {
0, // Mars Coordinated Time, at the meridian
360.0 - 77.45088572, // Perseverance lander site
360.0 - 137.441635, // Curiosity lander site
};
static char site_names_classic[MARS_TIME_NUM_SITES][3] = {
"MC",
"PE",
"CU",
};
static char site_names_custom[MARS_TIME_NUM_SITES][4] = {
"MTC",
"PER",
"CUR",
};
static uint16_t landing_sols[MARS_TIME_NUM_SITES] = {
0,
52304,
49269,
};
typedef struct {
uint8_t hour;
uint8_t minute;
uint8_t second;
} mars_clock_hms_t;
static void _h_to_hms(mars_clock_hms_t *date_time, double h) {
unsigned int seconds = (unsigned int)(h * 3600.0);
date_time->hour = seconds / 3600;
seconds = seconds % 3600;
date_time->minute = floor(seconds / 60);
date_time->second = round(seconds % 60);
}
static void _update(mars_time_state_t *state) {
char buf[8];
watch_date_time_t date_time = movement_get_local_date_time();
uint32_t now = watch_utility_date_time_to_unix_time(date_time, movement_get_current_timezone_offset());
// TODO: I'm skipping over some steps here.
// https://www.giss.nasa.gov/tools/mars24/help/algorithm.html
double jdut = 2440587.5 + ((double)now / 86400.0);
double jdtt = jdut + ((37.0 + 32.184) / 86400.0);
double jd2k = jdtt - 2451545.0;
double msd = ((jd2k - 4.5) / 1.0274912517) + 44796.0 - 0.0009626;
double mtc = fmod(24 * msd, 24);
double lmt;
if (state->current_site == 0) {
lmt = mtc;
} else {
double longitude = site_longitudes[state->current_site];
double lmst = mtc - ((longitude * 24.0) / 360.0);
lmt = fmod(lmst + 24, 24);
}
watch_display_text_with_fallback(WATCH_POSITION_TOP_LEFT, site_names_custom[state->current_site], site_names_classic[state->current_site]);
if (state->displaying_sol) {
// TODO: this is not right, mission sol should turn over at midnight local time?
uint16_t sol = floor(msd) - landing_sols[state->current_site];
sprintf(buf, "%6d", sol);
watch_display_text(WATCH_POSITION_TOP_RIGHT, " $");
watch_display_text(WATCH_POSITION_BOTTOM, buf);
watch_clear_colon();
watch_clear_indicator(WATCH_INDICATOR_24H);
} else {
mars_clock_hms_t mars_time;
_h_to_hms(&mars_time, lmt);
sprintf(buf, "%02d%02d%02d", mars_time.hour, mars_time.minute, mars_time.second);
watch_display_text(WATCH_POSITION_TOP_RIGHT, " ");
watch_display_text(WATCH_POSITION_BOTTOM, buf);
watch_set_colon();
watch_set_indicator(WATCH_INDICATOR_24H);
}
}
void mars_time_face_setup(uint8_t watch_face_index, void ** context_ptr) {
(void) watch_face_index;
if (*context_ptr == NULL) {
*context_ptr = malloc(sizeof(mars_time_state_t));
memset(*context_ptr, 0, sizeof(mars_time_state_t));
}
}
void mars_time_face_activate(void *context) {
mars_time_state_t *state = (mars_time_state_t *)context;
(void) state;
}
bool mars_time_face_loop(movement_event_t event, void *context) {
mars_time_state_t *state = (mars_time_state_t *)context;
switch (event.event_type) {
case EVENT_ACTIVATE:
case EVENT_TICK:
_update(state);
break;
case EVENT_LIGHT_BUTTON_UP:
state->displaying_sol = !state->displaying_sol;
_update(state);
break;
case EVENT_LIGHT_LONG_PRESS:
movement_illuminate_led();
break;
case EVENT_ALARM_BUTTON_UP:
state->current_site = (state->current_site + 1) % MARS_TIME_NUM_SITES;
_update(state);
break;
case EVENT_TIMEOUT:
// TODO: make this lower power so we can avoid timeout
movement_move_to_face(0);
break;
case EVENT_LOW_ENERGY_UPDATE:
// TODO: low energy update
// watch_start_sleep_animation(500);
break;
case EVENT_LIGHT_BUTTON_DOWN:
// don't light up every time light is hit
break;
default:
movement_default_loop_handler(event);
break;
}
return true;
}
void mars_time_face_resign(void *context) {
(void) context;
}

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/*
* MIT License
*
* Copyright (c) 2022 Joey Castillo
*
* 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.
*/
#ifndef MARS_TIME_FACE_H_
#define MARS_TIME_FACE_H_
/*
* MARS TIME face
*
* This watch face is dedicated to Martian timekeeping.
* It has several modes, and can display either a time or a date.
*
* Pressing the ALARM button cycles through different time zones on Mars:
* MC - Mars Coordinated Time, the time at Airy-0 Crater on the Martian prime meridian
* ZH - Local mean solar time for the Zhurong rover
* PE - LMST for the Perseverance rover
* IN - LMST for the Insight lander
* CU - LMST for the Curiosity rover
*
* Press the LIGHT button to toggle between displaying time and date:
* MC S - the Mars Sol Date, Martian days since December 29, 1873
* ZH Sol - Mission sol for the Zhurong rover
* PE Sol - Mission sol for the Perseverance rover
* IN S - Mission sol for the InSight lander
* CU S - Mission sol for the Curiosity rover
*
* Note that where the mission sol is below 1000, this watch face displays
* the word “Sol” on the bottom line. When the mission sol is over 1000, the
* word “Sol” will not fit and so it displays a stylized letter S at the top
* right.
*/
#include "movement.h"
typedef enum {
MARS_TIME_MERIDIAN,
MARS_TIME_PERSEVERANCE_SITE,
MARS_TIME_CURIOSITY_SITE,
MARS_TIME_NUM_SITES,
} mars_time_site_t;
typedef struct {
mars_time_site_t current_site;
bool displaying_sol;
} mars_time_state_t;
void mars_time_face_setup(uint8_t watch_face_index, void ** context_ptr);
void mars_time_face_activate(void *context);
bool mars_time_face_loop(movement_event_t event, void *context);
void mars_time_face_resign(void *context);
#define mars_time_face ((const watch_face_t){ \
mars_time_face_setup, \
mars_time_face_activate, \
mars_time_face_loop, \
mars_time_face_resign, \
NULL, \
})
#endif // MARS_TIME_FACE_H_