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Update beats face to use UTC+1. Simplify clock2beats function.

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This commit is contained in:
Daniel Bergman 2025-06-30 21:39:21 +02:00
parent e3101749c9
commit fff73a8806
2 changed files with 22 additions and 15 deletions
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28
watch-faces/clock/beats_face.c
View File

@ -54,11 +54,13 @@ bool beats_face_loop(movement_event_t event, void *context) {
uint32_t centibeats;
watch_date_time_t date_time;
uint8_t bmt_hour; // BMT = Biel Mean Time
switch (event.event_type) {
case EVENT_ACTIVATE:
case EVENT_TICK:
date_time = movement_get_local_date_time();
centibeats = clock2beats(date_time.unit.hour, date_time.unit.minute, date_time.unit.second, event.subsecond, movement_get_current_timezone_offset());
date_time = movement_get_utc_date_time();
bmt_hour = (date_time.unit.hour + 1) % 24;
centibeats = clock2beats(bmt_hour, date_time.unit.minute, date_time.unit.second, event.subsecond);
if (centibeats == state->last_centibeat_displayed) {
// we missed this update, try again next subsecond
state->next_subsecond_update = (event.subsecond + 1) % BEAT_REFRESH_FREQUENCY;
@ -73,8 +75,9 @@ bool beats_face_loop(movement_event_t event, void *context) {
break;
case EVENT_LOW_ENERGY_UPDATE:
if (!watch_sleep_animation_is_running()) watch_start_sleep_animation(432);
date_time = movement_get_local_date_time();
centibeats = clock2beats(date_time.unit.hour, date_time.unit.minute, date_time.unit.second, event.subsecond, movement_get_current_timezone_offset());
date_time = movement_get_utc_date_time();
bmt_hour = (date_time.unit.hour + 1) % 24;
centibeats = clock2beats(bmt_hour, date_time.unit.minute, date_time.unit.second, event.subsecond);
sprintf(buf, "%4lu ", centibeats / 100);
watch_display_text_with_fallback(WATCH_POSITION_TOP, "beat", "bt");
@ -92,14 +95,11 @@ void beats_face_resign(void *context) {
(void) context;
}
uint32_t clock2beats(uint32_t hours, uint32_t minutes, uint32_t seconds, uint32_t subseconds, int16_t utc_offset) {
uint32_t retval = seconds * 1000 + (subseconds * 1000) / (BEAT_REFRESH_FREQUENCY);
retval += 60 * minutes * 1000;
retval += hours * 60 * 60 * 1000;
retval -= (utc_offset - 3600) * 1000;
retval /= 864; // convert to centibeats
retval %= 100000;
return retval;
uint32_t clock2beats(uint32_t hours, uint32_t minutes, uint32_t seconds, uint32_t subseconds) {
// Calculate total milliseconds since midnight
uint32_t ms = (hours * 3600 + minutes * 60 + seconds) * 1000 + (subseconds * 1000) / BEAT_REFRESH_FREQUENCY;
// 1 beat = 86.4 seconds = 86400 ms, so 1 centibeat = 864 ms
uint32_t centibeats = ms / 864;
centibeats %= 100000;
return centibeats;
}

9
watch-faces/clock/beats_face.h
View File

@ -30,10 +30,17 @@
*
* The Beat Time face displays the current Swatch Internet Time, or .beat time.
* This is a decimal time system that divides the day into 1000 beats.
* 0 beats = 00:00:00.000 UTC+1, also known as BMT time - Biel Mean Time.
*
* 1 beat of time equals 86.4 seconds.
*
* The three large digits in the bottom row indicate the current beat, and the
* two smaller digits (normally the seconds in Simple Clock) indicate the
* fractional beat; so for example you can read “67214” as “beat 672.14”.
*
* This implementation uses UTC time, adds one hour to get BMT, and does not
* observe daylight saving time or local time zones as Swatch Internet Time
* does not do that.
*/
#include "movement.h"
@ -43,7 +50,7 @@ typedef struct {
uint32_t last_centibeat_displayed;
} beats_face_state_t;
uint32_t clock2beats(uint32_t hours, uint32_t minutes, uint32_t seconds, uint32_t subseconds, int16_t utc_offset);
uint32_t clock2beats(uint32_t hours, uint32_t minutes, uint32_t seconds, uint32_t subseconds);
void beats_face_setup(uint8_t watch_face_index, void ** context_ptr);
void beats_face_activate(void *context);
bool beats_face_loop(movement_event_t event, void *context);