faces/alarm_thermometer: new watch face

movement/make/Makefile

@@ -129,6 +129,7 @@ SRCS += \
   ../watch_faces/clock/minute_repeater_decimal_face.c \
   ../watch_faces/complication/tuning_tones_face.c \
   ../watch_faces/complication/kitchen_conversions_face.c \
+  ../watch_faces/sensor/alarm_thermometer_face.c \
 # New watch faces go above this line.
 
 # Leave this line at the bottom of the file; it has all the targets for making your project.

movement/movement_faces.h

@@ -104,6 +104,7 @@
 #include "minute_repeater_decimal_face.h"
 #include "tuning_tones_face.h"
 #include "kitchen_conversions_face.h"
+#include "alarm_thermometer_face.h"
 // New includes go above this line.
 
 #endif // MOVEMENT_FACES_H_

movement/watch_faces/sensor/alarm_thermometer_face.c

@@ -0,0 +1,154 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2024 Christian Buschau
+ *
+ * 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 <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include "alarm_thermometer_face.h"
+#include "thermistor_driver.h"
+
+static float _alarm_thermometer_face_update(bool in_fahrenheit) {
+    thermistor_driver_enable();
+    float temperature_c = thermistor_driver_get_temperature();
+    char buf[14];
+    if (in_fahrenheit) {
+        sprintf(buf, "%4.1f#F", temperature_c * 1.8 + 32.0);
+    } else {
+        sprintf(buf, "%4.1f#C", temperature_c);
+    }
+    watch_display_string(buf, 4);
+    thermistor_driver_disable();
+    return temperature_c;
+}
+
+static void _alarm_thermometer_face_clear(int last[]) {
+    for (size_t i = 0; i < LAST_SIZE; i++) {
+        last[i] = INT_MIN;
+    }
+}
+
+void alarm_thermometer_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
+    (void) settings;
+    (void) watch_face_index;
+    if (*context_ptr == NULL) {
+        *context_ptr = malloc(sizeof(alarm_thermometer_state_t));
+        memset(*context_ptr, 0, sizeof(alarm_thermometer_state_t));
+    }
+}
+
+void alarm_thermometer_face_activate(movement_settings_t *settings, void *context) {
+    (void) settings;
+    alarm_thermometer_state_t *state = (alarm_thermometer_state_t *)context;
+    state->mode = MODE_NORMAL;
+    _alarm_thermometer_face_clear(state->last);
+    watch_display_string("AT", 0);
+}
+
+bool alarm_thermometer_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
+    alarm_thermometer_state_t *state = (alarm_thermometer_state_t *)context;
+
+    switch (event.event_type) {
+        case EVENT_ACTIVATE:
+            _alarm_thermometer_face_update(settings->bit.use_imperial_units);
+            break;
+        case EVENT_TICK:
+            if (watch_rtc_get_date_time().unit.second % 5 == 0) {
+                switch (state->mode) {
+                    case MODE_NORMAL:
+                        _alarm_thermometer_face_update(settings->bit.use_imperial_units);
+                        break;
+                    case MODE_ALARM:
+                        for (size_t i = LAST_SIZE - 1; i > 0; i--) {
+                            state->last[i] = state->last[i - 1];
+                        }
+                        state->last[0] = roundf(_alarm_thermometer_face_update(settings->bit.use_imperial_units) * 10.0f);
+                        bool constant = true;
+                        for (size_t i = 1; i < LAST_SIZE; i++) {
+                            if (state->last[i - 1] != state->last[i]) {
+                                constant = false;
+                                break;
+                            }
+                        }
+                        if (constant) {
+                            state->mode = MODE_FREEZE;
+                            watch_set_indicator(WATCH_INDICATOR_SIGNAL);
+                            movement_play_alarm();
+                        }
+                        break;
+                    case MODE_FREEZE:
+                        break;
+                }
+            }
+            break;
+        case EVENT_ALARM_BUTTON_UP:
+            switch (state->mode) {
+                case MODE_NORMAL:
+                    state->mode = MODE_ALARM;
+                    watch_set_indicator(WATCH_INDICATOR_BELL);
+                    _alarm_thermometer_face_clear(state->last);
+                    break;
+                case MODE_FREEZE:
+                    state->mode = MODE_NORMAL;
+                    watch_clear_indicator(WATCH_INDICATOR_BELL);
+                    watch_clear_indicator(WATCH_INDICATOR_SIGNAL);
+                    break;
+                case MODE_ALARM:
+                    state->mode = MODE_NORMAL;
+                    watch_clear_indicator(WATCH_INDICATOR_BELL);
+                    _alarm_thermometer_face_update(settings->bit.use_imperial_units);
+                    break;
+            }
+            if (settings->bit.button_should_sound) {
+                watch_buzzer_play_note(BUZZER_NOTE_C7, 50);
+            }
+            break;
+        case EVENT_ALARM_LONG_PRESS:
+            if (state->mode != MODE_FREEZE) {
+                settings->bit.use_imperial_units = !settings->bit.use_imperial_units;
+                _alarm_thermometer_face_update(settings->bit.use_imperial_units);
+            }
+            break;
+        case EVENT_LOW_ENERGY_UPDATE:
+            if (!watch_tick_animation_is_running()) {
+                state->mode = MODE_NORMAL;
+                watch_clear_indicator(WATCH_INDICATOR_BELL);
+                watch_clear_indicator(WATCH_INDICATOR_SIGNAL);
+                watch_start_tick_animation(1000);
+            }
+            if (watch_rtc_get_date_time().unit.minute % 5 == 0) {
+                _alarm_thermometer_face_update(settings->bit.use_imperial_units);
+                watch_display_string("  ", 8);
+            }
+            break;
+        default:
+            return movement_default_loop_handler(event, settings);
+    }
+
+    return true;
+}
+
+void alarm_thermometer_face_resign(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+}

movement/watch_faces/sensor/alarm_thermometer_face.h

@@ -0,0 +1,74 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2024 Christian Buschau
+ *
+ * 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.
+ */
+
+#ifndef ALARM_THERMOMETER_FACE_H_
+#define ALARM_THERMOMETER_FACE_H_
+
+#include <limits.h>
+#include "movement.h"
+
+/*
+ * ALARM THERMOMETER
+ *
+ * This watch face shows the current temperature in degrees Celsius. Press and
+ * hold the alarm button to toggle between Celsius and Fahrenheit. Press and
+ * release the alarm button to start a "timer". The watch will sound an alarm
+ * when the temperature remains constant for at least 30 seconds and the
+ * temperature will stop updating until you press the alarm button. You can
+ * cancel the alarm by pressing the button again. If the temperature doesn't
+ * remain constant until the low energy timeout is reached, the alarm will stop.
+ * This is useful to measure e.g. the room temperature. If you lay off your
+ * watch from your wrist, it will take some time until it cools down, and will
+ * notify you when the measurement is constant enough.
+ * THIS WATCH FACE IS NOT INTENDED TO DIAGNOSE, TREAT, CURE OR PREVENT ANY
+ * DISEASE.
+ */
+
+#define LAST_SIZE 6
+
+typedef enum {
+    MODE_NORMAL,
+    MODE_ALARM,
+    MODE_FREEZE
+} alarm_thermometer_mode_t;
+
+typedef struct {
+    int last[LAST_SIZE];
+    alarm_thermometer_mode_t mode;
+} alarm_thermometer_state_t;
+
+void alarm_thermometer_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
+void alarm_thermometer_face_activate(movement_settings_t *settings, void *context);
+bool alarm_thermometer_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void alarm_thermometer_face_resign(movement_settings_t *settings, void *context);
+
+#define alarm_thermometer_face ((const watch_face_t){ \
+    alarm_thermometer_face_setup, \
+    alarm_thermometer_face_activate, \
+    alarm_thermometer_face_loop, \
+    alarm_thermometer_face_resign, \
+    NULL, \
+})
+
+#endif // ALARM_THERMOMETER_FACE_H_