refactor: break out different areas of functionality

watch-library/watch/watch_rtc.c

@@ -0,0 +1,40 @@
+/*
+ * 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.
+ */
+
+ bool _watch_rtc_is_enabled() {
+    return RTC->MODE0.CTRLA.bit.ENABLE;
+}
+
+void watch_set_date_time(struct calendar_date_time date_time) {
+    calendar_set_date(&CALENDAR_0, &date_time.date);
+    calendar_set_time(&CALENDAR_0, &date_time.time);
+}
+
+void watch_get_date_time(struct calendar_date_time *date_time) {
+    calendar_get_date_time(&CALENDAR_0, date_time);
+}
+
+void watch_register_tick_callback(ext_irq_cb_t callback) {
+    _prescaler_register_callback(&CALENDAR_0.device, callback);
+}