329 lines
11 KiB
C
329 lines
11 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2022 Andreas Nebinger
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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 all
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* 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 THE
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* SOFTWARE.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "fast_stopwatch_face.h"
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#include "watch.h"
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#include "watch_common_display.h"
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#include "watch_utility.h"
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#include "watch_rtc.h"
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/*
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This watch face implements the original F-91W stopwatch functionality
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including counting hundredths of seconds and lap timing. There are two
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improvements compared to the functionality of the original:
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1. When reaching 59:59 the counter does not simply jump back to zero,
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but keeps track of hours in the upper right hand corner. (Up to 24h)
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2. Long pressing the light button toggles the led behaviour: it either
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turns on on each button press or it doesn't.
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*/
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#if __EMSCRIPTEN__
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#include <emscripten.h>
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#include <emscripten/html5.h>
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#else
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#include "tc.h"
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#endif
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// distant future for background task: January 1, 2083
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static const watch_date_time_t distant_future = {
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.unit = {0, 0, 0, 1, 1, 63}
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};
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static uint32_t _ticks;
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static uint32_t _lap_ticks;
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static uint8_t _blink_ticks;
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static uint32_t _old_seconds;
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static uint8_t _old_minutes;
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static uint8_t _hours;
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static bool _colon;
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static bool _is_running;
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#if __EMSCRIPTEN__
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static long _em_interval_id = 0;
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void em_cb_handler(void *userData) {
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// interrupt handler for emscripten 128 Hz callbacks
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(void) userData;
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_ticks++;
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}
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static void _cb_initialize() { }
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static inline void _cb_stop() {
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emscripten_clear_interval(_em_interval_id);
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_em_interval_id = 0;
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_is_running = false;
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}
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static inline void _cb_start() {
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// initiate 128 hz callback
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_em_interval_id = emscripten_set_interval(em_cb_handler, (double)(1000/128), (void *)NULL);
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}
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#else
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static inline void _cb_start() {
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// start the TC1 timer
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tc_enable(1);
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_is_running = true;
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}
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static inline void _cb_stop() {
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// stop the TC1 timer
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tc_disable(1);
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_is_running = false;
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}
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static void _cb_initialize() {
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tc_init(1, GENERIC_CLOCK_3, TC_PRESCALER_DIV4);
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tc_set_counter_mode(1, TC_COUNTER_MODE_8BIT);
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tc_set_run_in_standby(1, true);
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_cb_stop();
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tc_count8_set_period(1, 1); // 1024 Hz divided by 4 divided by 2 results in a 128 Hz interrupt
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/// FIXME: #SecondMovement, we need a gossamer wrapper for interrupts.
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TC1->COUNT8.INTENSET.bit.OVF = 1;
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NVIC_ClearPendingIRQ(TC1_IRQn);
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NVIC_EnableIRQ (TC1_IRQn);
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}
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void irq_handler_tc1(void);
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void irq_handler_tc1(void) {
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// interrupt handler for TC1 (globally!)
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_ticks++;
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TC1->COUNT8.INTFLAG.reg |= TC_INTFLAG_OVF;
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}
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#endif
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static inline void _button_beep() {
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// play a beep as confirmation for a button press (if applicable)
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if (movement_button_should_sound()) watch_buzzer_play_note(BUZZER_NOTE_C7, 50);
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}
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/// @brief Display minutes, seconds and fractions derived from 128 Hz tick counter
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/// on the lcd.
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/// @param ticks
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static void _display_ticks(uint32_t ticks) {
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char buf[14];
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uint8_t sec_100 = (ticks & 0x7F) * 100 / 128;
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uint32_t seconds = ticks >> 7;
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uint32_t minutes = seconds / 60;
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if (_hours) {
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sprintf(buf, "%2u", _hours);
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watch_display_text(WATCH_POSITION_TOP_RIGHT, buf);
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} else {
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watch_display_text(WATCH_POSITION_TOP_RIGHT, " ");
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}
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sprintf(buf, "%02lu%02lu%02u", minutes, (seconds % 60), sec_100);
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watch_display_text(WATCH_POSITION_BOTTOM, buf);
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}
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/// @brief Displays the current stopwatch time on the LCD (more optimized than _display_ticks())
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static void _draw() {
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if (_lap_ticks == 0) {
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char buf[14];
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uint8_t sec_100 = (_ticks & 0x7F) * 100 / 128;
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if (_is_running) {
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uint32_t seconds = _ticks >> 7;
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if (seconds != _old_seconds) {
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// seconds have changed
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_old_seconds = seconds;
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uint8_t minutes = seconds / 60;
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seconds %= 60;
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if (minutes != _old_minutes) {
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// minutes have changed, draw everything
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_old_minutes = minutes;
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minutes %= 60;
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if (_hours) {
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// with hour indicator
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sprintf(buf, "%2u", _hours);
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watch_display_text(WATCH_POSITION_TOP_RIGHT, buf);
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} else {
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// no hour indicator
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watch_display_text(WATCH_POSITION_TOP_RIGHT, " ");
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}
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sprintf(buf, "%02u%02lu%02u", minutes, seconds, sec_100);
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watch_display_text(WATCH_POSITION_BOTTOM, buf);
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} else {
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// just draw seconds
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sprintf(buf, "%02lu", seconds);
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// note that we're drawing the seconds in the "minutes" position, since this
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// watch face uses the "seconds" position for hundredths of seconds
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watch_display_text(WATCH_POSITION_MINUTES, buf);
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watch_display_character_lp_seconds('0' + sec_100 / 10, 8);
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watch_display_character_lp_seconds('0' + sec_100 % 10, 9);
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}
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} else {
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// only draw 100ths of seconds
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watch_display_character_lp_seconds('0' + sec_100 / 10, 8);
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watch_display_character_lp_seconds('0' + sec_100 % 10, 9);
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}
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} else {
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_display_ticks(_ticks);
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}
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}
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if (_is_running) {
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// blink the colon every half second
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uint8_t blink_ticks = ((_ticks >> 6) & 1);
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if (blink_ticks != _blink_ticks) {
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_blink_ticks = blink_ticks;
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_colon = !_colon;
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if (_colon) watch_set_colon();
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else watch_clear_colon();
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}
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}
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}
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static inline void _update_lap_indicator() {
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if (_lap_ticks) watch_set_indicator(WATCH_INDICATOR_LAP);
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else watch_clear_indicator(WATCH_INDICATOR_LAP);
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}
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static inline void _set_colon() {
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watch_set_colon();
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_colon = true;
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}
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void fast_stopwatch_face_setup(uint8_t watch_face_index, void ** context_ptr) {
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(void) watch_face_index;
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if (*context_ptr == NULL) {
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*context_ptr = malloc(sizeof(fast_stopwatch_state_t));
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memset(*context_ptr, 0, sizeof(fast_stopwatch_state_t));
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fast_stopwatch_state_t *state = (fast_stopwatch_state_t *)*context_ptr;
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_ticks = _lap_ticks = _blink_ticks = _old_minutes = _old_seconds = _hours = 0;
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_is_running = _colon = false;
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state->light_on_button = true;
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}
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if (!_is_running) {
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// prepare the 128 Hz callback source
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_cb_initialize();
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}
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}
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void fast_stopwatch_face_activate(void *context) {
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(void) context;
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if (_is_running) {
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// The background task will keep the watch from entering low energy mode while the stopwatch is on screen.
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movement_schedule_background_task(distant_future);
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}
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}
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bool fast_stopwatch_face_loop(movement_event_t event, void *context) {
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fast_stopwatch_state_t *state = (fast_stopwatch_state_t *)context;
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// handle overflow of fast ticks
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while (_ticks >= (128 * 60 * 60)) {
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_ticks -= (128 * 60 * 60);
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_hours++;
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if (_hours >= 24) _hours -= 24;
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// initiate a re-draw
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_old_minutes = 59;
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}
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switch (event.event_type) {
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case EVENT_ACTIVATE:
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_set_colon();
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watch_display_text_with_fallback(WATCH_POSITION_TOP_LEFT, "STW", "ST");
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_update_lap_indicator();
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if (_is_running) movement_request_tick_frequency(16);
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_display_ticks(_lap_ticks ? _lap_ticks : _ticks);
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break;
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case EVENT_TICK:
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_draw();
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break;
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case EVENT_LIGHT_LONG_PRESS:
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// kind od hidden feature: long press toggles light on or off
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state->light_on_button = !state->light_on_button;
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if (state->light_on_button) movement_illuminate_led();
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else watch_set_led_off();
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break;
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case EVENT_ALARM_BUTTON_DOWN:
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_is_running = !_is_running;
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if (_is_running) {
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// start or continue stopwatch
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movement_request_tick_frequency(16);
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// register 128 hz callback for time measuring
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_cb_start();
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// schedule the keepalive task when running
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movement_schedule_background_task(distant_future);
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} else {
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// stop the stopwatch
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_cb_stop();
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movement_request_tick_frequency(1);
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_set_colon();
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// cancel the keepalive task
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movement_cancel_background_task();
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}
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_draw();
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_button_beep();
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break;
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case EVENT_LIGHT_BUTTON_DOWN:
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if (state->light_on_button) movement_illuminate_led();
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if (_is_running) {
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if (_lap_ticks) {
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// clear lap and continue running
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_lap_ticks = 0;
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movement_request_tick_frequency(16);
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} else {
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// set lap ticks and stop updating the display
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_lap_ticks = _ticks;
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movement_request_tick_frequency(2);
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_set_colon();
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}
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} else {
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if (_lap_ticks) {
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// clear lap and show running stopwatch
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_lap_ticks = 0;
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} else if (_ticks) {
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// reset stopwatch
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_ticks = _lap_ticks = _blink_ticks = _old_minutes = _old_seconds = _hours = 0;
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_button_beep();
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}
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}
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_display_ticks(_ticks);
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_update_lap_indicator();
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break;
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case EVENT_TIMEOUT:
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if (!_is_running) movement_move_to_face(0);
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break;
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case EVENT_LOW_ENERGY_UPDATE:
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_draw();
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break;
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default:
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movement_default_loop_handler(event);
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break;
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}
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return true;
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}
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void fast_stopwatch_face_resign(void *context) {
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(void) context;
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// cancel the keepalive task
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movement_cancel_background_task();
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}
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