1 files changed, 91 insertions, 0 deletions
diff --git a/movement/watch_faces/demo/voltage_face.c b/movement/watch_faces/demo/voltage_face.c
new file mode 100644
index 00000000..24346aa3
--- /dev/null
+++ b/movement/watch_faces/demo/voltage_face.c
@@ -0,0 +1,91 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 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 <stdlib.h>
+#include <string.h>
+#include "voltage_face.h"
+#include "watch.h"
+
+static void _voltage_face_update_display(void) {
+    char buf[14];
+    float voltage = (float)watch_get_vcc_voltage() / 1000.0;
+    sprintf(buf, "BA  %4.2f V", voltage);
+    // printf("%s\n", buf);
+    watch_display_string(buf, 0);
+}
+
+void voltage_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
+    (void) settings;
+    (void) watch_face_index;
+    (void) context_ptr;
+}
+
+void voltage_face_activate(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+    watch_enable_adc();
+    // if we set the reference voltage here, watch_get_vcc_voltage won't do it over and over
+    watch_set_analog_reference_voltage(ADC_REFERENCE_INTREF);
+}
+
+bool voltage_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+    watch_date_time date_time;
+    switch (event.event_type) {
+        case EVENT_MODE_BUTTON_UP:
+            movement_move_to_next_face();
+            break;
+        case EVENT_LIGHT_BUTTON_DOWN:
+            movement_illuminate_led();
+            break;
+        case EVENT_ACTIVATE:
+            _voltage_face_update_display();
+            break;
+        case EVENT_TICK:
+            date_time = watch_rtc_get_date_time();
+            if (date_time.unit.second % 5 == 4) {
+                watch_set_indicator(WATCH_INDICATOR_SIGNAL);
+            } else if (date_time.unit.second % 5 == 0) {
+                _voltage_face_update_display();
+                watch_clear_indicator(WATCH_INDICATOR_SIGNAL);
+            }
+            break;
+        case EVENT_LOW_ENERGY_UPDATE:
+            watch_display_string("BA  SLEEP ", 0);
+            break;
+        default:
+            break;
+    }
+
+    return true;
+}
+
+void voltage_face_resign(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+    // make sure to restore the default in the end.
+    watch_set_analog_reference_voltage(ADC_REFERENCE_VCC);
+    watch_disable_adc();
+}