refactor: break out different areas of functionality

watch-library/watch/watch_private.c

@@ -0,0 +1,44 @@
+/*
+ * 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.
+ */
+
+void _watch_init() {
+    // disable the LED pin (it may have been enabled by the bootloader)
+    watch_disable_digital_output(RED);
+
+    // Use switching regulator for lower power consumption.
+    SUPC->VREG.bit.SEL = 1;
+    while(!SUPC->STATUS.bit.VREGRDY);
+
+    // External wake depends on RTC; calendar is a required module.
+    CALENDAR_0_init();
+    calendar_enable(&CALENDAR_0);
+
+    // Not sure if this belongs in every app -- is there a power impact?
+    delay_driver_init();
+
+    // set up state
+    btn_alarm_callback = NULL;
+    a2_callback = NULL;
+    d1_callback = NULL;
+}