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/*
* MIT License
*
* Copyright (c) 2020 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 "watch_rtc.h"
#include "watch_main_loop.h"
#include <emscripten.h>
#include <emscripten/html5.h>
static double time_offset = 0;
static long tick_callbacks[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
static long alarm_interval_id = -1;
static long alarm_timeout_id = -1;
static double alarm_interval;
ext_irq_cb_t alarm_callback;
ext_irq_cb_t btn_alarm_callback;
ext_irq_cb_t a2_callback;
ext_irq_cb_t a4_callback;
bool _watch_rtc_is_enabled(void) {
return true;
}
void _watch_rtc_init(void) {
}
void watch_rtc_set_date_time(watch_date_time date_time) {
time_offset = EM_ASM_DOUBLE({
const year = 2020 + (($0 >> 26) & 0x3f);
const month = ($0 >> 22) & 0xf;
const day = ($0 >> 17) & 0x1f;
const hour = ($0 >> 12) & 0x1f;
const minute = ($0 >> 6) & 0x3f;
const second = $0 & 0x3f;
const date = new Date(year, month - 1, day, hour, minute, second);
return date - Date.now();
}, date_time.reg);
}
watch_date_time watch_rtc_get_date_time(void) {
watch_date_time retval;
retval.reg = EM_ASM_INT({
const date = new Date(Date.now() + $0);
return date.getSeconds() |
(date.getMinutes() << 6) |
(date.getHours() << 12) |
(date.getDate() << 17) |
((date.getMonth() + 1) << 22) |
((date.getFullYear() - 2020) << 26);
}, time_offset);
return retval;
}
void watch_rtc_register_tick_callback(ext_irq_cb_t callback) {
watch_rtc_register_periodic_callback(callback, 1);
}
void watch_rtc_disable_tick_callback(void) {
watch_rtc_disable_periodic_callback(1);
}
static void watch_invoke_periodic_callback(void *userData) {
ext_irq_cb_t callback = userData;
callback();
resume_main_loop();
}
void watch_rtc_register_periodic_callback(ext_irq_cb_t callback, uint8_t frequency) {
// we told them, it has to be a power of 2.
if (__builtin_popcount(frequency) != 1) return;
// this left-justifies the period in a 32-bit integer.
uint32_t tmp = frequency << 24;
// now we can count the leading zeroes to get the value we need.
// 0x01 (1 Hz) will have 7 leading zeros for PER7. 0xF0 (128 Hz) will have no leading zeroes for PER0.
uint8_t per_n = __builtin_clz(tmp);
// this also maps nicely to an index for our list of tick callbacks.
double interval = 1000 / frequency; // in msec
if (tick_callbacks[per_n] != -1) emscripten_clear_interval(tick_callbacks[per_n]);
tick_callbacks[per_n] = emscripten_set_interval(watch_invoke_periodic_callback, interval, (void *)callback);
}
void watch_rtc_disable_periodic_callback(uint8_t frequency) {
if (__builtin_popcount(frequency) != 1) return;
uint8_t per_n = __builtin_clz(frequency << 24);
if (tick_callbacks[per_n] != -1) {
emscripten_clear_interval(tick_callbacks[per_n]);
tick_callbacks[per_n] = -1;
}
}
void watch_rtc_disable_matching_periodic_callbacks(uint8_t mask) {
for (int i = 0; i < 8; i++) {
if (tick_callbacks[i] != -1 && (mask & (1 << (7 - i))) != 0) {
emscripten_clear_interval(tick_callbacks[i]);
tick_callbacks[i] = -1;
}
}
}
void watch_rtc_disable_all_periodic_callbacks(void) {
watch_rtc_disable_matching_periodic_callbacks(0xFF);
}
static void watch_invoke_alarm_interval_callback(void *userData) {
if (alarm_callback) alarm_callback();
}
static void watch_invoke_alarm_callback(void *userData) {
if (alarm_callback) alarm_callback();
alarm_interval_id = emscripten_set_interval(watch_invoke_alarm_interval_callback, alarm_interval, NULL);
}
void watch_rtc_register_alarm_callback(ext_irq_cb_t callback, watch_date_time alarm_time, watch_rtc_alarm_match mask) {
watch_rtc_disable_alarm_callback();
switch (mask) {
case ALARM_MATCH_DISABLED:
return;
case ALARM_MATCH_SS:
alarm_interval = 60 * 1000;
break;
case ALARM_MATCH_MMSS:
alarm_interval = 60 * 60 * 1000;
break;
case ALARM_MATCH_HHMMSS:
alarm_interval = 60 * 60 * 60 * 1000;
break;
}
double timeout = EM_ASM_DOUBLE({
const now = Date.now();
const date = new Date(now + $0);
const hour = ($1 >> 12) & 0x1f;
const minute = ($1 >> 6) & 0x3f;
const second = $1 & 0x3f;
if ($2 == 1) { // SS
if (second < date.getSeconds()) date.setMinutes(date.getMinutes() + 1);
date.setSeconds(second);
} else if ($2 == 2) { // MMSS
if (second < date.getSeconds()) date.setMinutes(date.getMinutes() + 1);
if (minute < date.getMinutes()) date.setHours(date.getHours() + 1);
date.setMinutes(minute, second);
} else if ($2 == 3) { // HHMMSS
if (second < date.getSeconds()) date.setMinutes(date.getMinutes() + 1);
if (minute < date.getMinutes()) date.setHours(date.getHours() + 1);
if (hour < date.getHours()) date.setDate(date.getDate() + 1);
date.setHours(hour, minute, second);
} else {
throw 'Invalid alarm match mask';
}
return date - now;
}, time_offset, alarm_time.reg, mask);
alarm_callback = callback;
alarm_timeout_id = emscripten_set_timeout(watch_invoke_alarm_callback, timeout, NULL);
}
void watch_rtc_disable_alarm_callback(void) {
alarm_callback = NULL;
alarm_interval = 0;
if (alarm_timeout_id != -1) {
emscripten_clear_timeout(alarm_timeout_id);
alarm_timeout_id = -1;
}
if (alarm_interval_id != -1) {
emscripten_clear_interval(alarm_interval_id);
alarm_interval_id = -1;
}
}
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