Sensor Watch Simulator (#35)

* Put something on screen

* Use the 32bit watch_date_time repr to pass from JS

* Implement periodic callbacks

* Clear display on enabling

* Hook up watch_set_led_color() to SVG (green-only)

* Make debug output full-width

* Remove default Emscripten canvas

* Implement sleep and button clicks

* Fix time zone conversion bug in beats-time app

* Clean up warnings

* Fix pin levels

* Set time zone to browser value (if available)

* Add basic backup data saving

* Silence format specifier warnings in both targets

* Remove unnecessary, copied files

* Use RTC pointer to clear callbacks (if available)

* Use preprocessor define to avoid hardcoding MOVEMENT_NUM_FACES

* Change each face to const preprocessor definition

* Remove Intl.DateTimeFormat usage

* Update shell.html title, header

* Add touch start/end event handlers on SVG buttons

* Update shell.html

* Update folder structure (shared, simulator, hardware under watch-library)

* Tease out shared components from watch_slcd

* Clean up simulator watch_slcd.c inline JS calls

* Fix missing newlines at end of file

* Add simulator warnings (except format, unused-paremter)

* Implement remaining watch_rtc functions

* Fix button bug on mouse down then drag out

* Implement remaining watch_slcd functions

* Link keyboard events to buttons (for keys A, L, M)

* Rewrite event handling (mouse, touch, keyboard) in C

* Set explicit text UTF-8 charset in shell.html

* Address PR comments

* Remove unused directories from include paths

1 files changed, 223 insertions, 0 deletions

diff --git a/watch-library/simulator/watch/watch_rtc.c b/watch-library/simulator/watch/watch_rtc.c
new file mode 100644
index 00000000..573c0ff2
--- /dev/null
+++ b/watch-library/simulator/watch/watch_rtc.c
@@ -0,0 +1,223 @@
+/*
+ * 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 <emscripten.h>
+#include <emscripten/html5.h>
+
+static double time_offset = 0;
+static long tick_callbacks[8];
+
+static long alarm_interval_id;
+static long alarm_timeout_id;
+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();
+
+    void resume_main_loop(void);
+    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
+    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);
+    emscripten_clear_interval(tick_callbacks[per_n]);
+    tick_callbacks[per_n] = 0;
+}
+
+void watch_rtc_disable_all_periodic_callbacks(void) {
+    for (int i = 0; i < 8; i++) {
+        if (tick_callbacks[i] != 0) {
+            emscripten_clear_interval(tick_callbacks[i]);
+            tick_callbacks[i] = 0;
+        }
+    }
+}
+
+static void watch_invoke_alarm_interval_callback(void *userData) {
+    (void)userData;
+    if (alarm_callback) alarm_callback();
+}
+
+static void watch_invoke_alarm_callback(void *userData) {
+    (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) {
+        emscripten_clear_timeout(alarm_timeout_id);
+        alarm_timeout_id = 0;
+    }
+
+    if (alarm_interval_id) {
+        emscripten_clear_interval(alarm_interval_id);
+        alarm_interval_id = 0;
+    }
+}
+
+///////////////////////
+// Deprecated functions
+
+void watch_set_date_time(struct calendar_date_time date_time) {
+    watch_date_time val;
+    val.unit.second = date_time.time.sec;
+    val.unit.minute = date_time.time.min;
+    val.unit.hour = date_time.time.hour;
+    val.unit.day = date_time.date.day;
+    val.unit.month = date_time.date.month;
+    val.unit.year = date_time.date.year - WATCH_RTC_REFERENCE_YEAR;
+    watch_rtc_set_date_time(val);
+}
+
+void watch_get_date_time(struct calendar_date_time *date_time) {
+    if (date_time == NULL) return;
+    watch_date_time val = watch_rtc_get_date_time();
+    date_time->time.sec = val.unit.second;
+    date_time->time.min = val.unit.minute;
+    date_time->time.hour = val.unit.hour;
+    date_time->date.day = val.unit.day;
+    date_time->date.month = val.unit.month;
+    date_time->date.year = val.unit.year + WATCH_RTC_REFERENCE_YEAR;
+}
+
+void watch_register_tick_callback(ext_irq_cb_t callback) {
+    watch_rtc_register_tick_callback(callback);
+}