WIP: thermistor data logger

movement/make/Makefile

@@ -31,6 +31,7 @@ SRCS += \
   ../watch_faces/complications/pulsometer_face.c \
   ../watch_faces/thermistor/thermistor_driver.c \
   ../watch_faces/thermistor/thermistor_readout_face.c \
+  ../watch_faces/thermistor/thermistor_logging_face.c \
   ../watch_faces/demos/character_set_face.c \
 
 # Leave this line at the bottom of the file; it has all the targets for making your project.

movement/movement_config.h

@@ -6,6 +6,7 @@
 #include "set_time_face.h"
 #include "pulsometer_face.h"
 #include "thermistor_readout_face.h"
+#include "thermistor_logging_face.h"
 #include "character_set_face.h"
 
 const watch_face_t watch_faces[] = {

movement/watch_faces/thermistor/thermistor_logging_face.c

@@ -0,0 +1,109 @@
+#include <stdlib.h>
+#include <string.h>
+#include "thermistor_logging_face.h"
+#include "thermistor_driver.h"
+#include "watch.h"
+
+void _thermistor_logging_face_log_data(thermistor_logger_state_t *logger_state) {
+    thermistor_driver_enable();
+    watch_date_time date_time = watch_rtc_get_date_time();
+    size_t pos = logger_state->data_points % THERMISTOR_LOGGING_NUM_DATA_POINTS;
+
+    logger_state->data[pos].timestamp.reg = date_time.reg;
+    logger_state->data[pos].temperature_c = thermistor_driver_get_temperature();
+    logger_state->data_points++;
+
+    thermistor_driver_disable();
+}
+
+void _thermistor_logging_face_update_display(thermistor_logger_state_t *logger_state, bool in_fahrenheit, bool clock_mode_24h) {
+    int8_t pos = (logger_state->data_points - 1 - logger_state->display_index) % THERMISTOR_LOGGING_NUM_DATA_POINTS;
+    char buf[14];
+
+    watch_clear_indicator(WATCH_INDICATOR_24H);
+    watch_clear_indicator(WATCH_INDICATOR_PM);
+    watch_clear_colon();
+
+    if (pos < 0) {
+        sprintf(buf, "TL%2dno dat", logger_state->display_index);
+    } else if (logger_state->ts_ticks) {
+        watch_date_time date_time = logger_state->data[pos].timestamp;
+        watch_set_colon();
+        if (clock_mode_24h) {
+            watch_set_indicator(WATCH_INDICATOR_24H);
+        } else {
+            if (date_time.unit.hour > 11) watch_set_indicator(WATCH_INDICATOR_PM);
+            date_time.unit.hour %= 12;
+            if (date_time.unit.hour == 0) date_time.unit.hour = 12;
+        }
+        sprintf(buf, "AT%2d%2d%02d%02d", date_time.unit.day, date_time.unit.hour, date_time.unit.minute, date_time.unit.second);
+    } else {
+        if (in_fahrenheit) {
+            sprintf(buf, "TL%2d%4.1f#F", logger_state->display_index, logger_state->data[pos].temperature_c * 1.8 + 32.0);
+        } else {
+            sprintf(buf, "TL%2d%4.1f#C", logger_state->display_index, logger_state->data[pos].temperature_c);
+        }
+    }
+
+    watch_display_string(buf, 0);
+}
+
+void thermistor_logging_face_setup(movement_settings_t *settings, void ** context_ptr) {
+    (void) settings;
+    if (*context_ptr == NULL) *context_ptr = malloc(sizeof(thermistor_logger_state_t));
+    memset(*context_ptr, 0, sizeof(thermistor_logger_state_t));
+}
+
+void thermistor_logging_face_activate(movement_settings_t *settings, void *context) {
+    (void) settings;
+    thermistor_logger_state_t *logger_state = (thermistor_logger_state_t *)context;
+    logger_state->display_index = 0;
+    logger_state->ts_ticks = 0;
+}
+
+bool thermistor_logging_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
+    thermistor_logger_state_t *logger_state = (thermistor_logger_state_t *)context;
+    watch_date_time date_time = watch_rtc_get_date_time();
+    switch (event.event_type) {
+        case EVENT_TIMEOUT:
+            movement_move_to_face(0);
+            break;
+        case EVENT_MODE_BUTTON_UP:
+            movement_move_to_next_face();
+            break;
+        case EVENT_LIGHT_LONG_PRESS:
+            // light button shows the timestamp, but if you need the light, long press it.
+            movement_illuminate_led();
+            break;
+        case EVENT_LIGHT_BUTTON_DOWN:
+            logger_state->ts_ticks = 2;
+            _thermistor_logging_face_update_display(logger_state, settings->bit.use_imperial_units, settings->bit.clock_mode_24h);
+            break;
+        case EVENT_ALARM_BUTTON_DOWN:
+            logger_state->display_index = (logger_state->display_index + 1) % THERMISTOR_LOGGING_NUM_DATA_POINTS;
+            logger_state->ts_ticks = 0;
+            // fall through
+        case EVENT_ACTIVATE:
+            _thermistor_logging_face_update_display(logger_state, settings->bit.use_imperial_units, settings->bit.clock_mode_24h);
+            break;
+        case EVENT_TICK:
+            if (logger_state->ts_ticks && --logger_state->ts_ticks == 0) {
+                _thermistor_logging_face_update_display(logger_state, settings->bit.use_imperial_units, settings->bit.clock_mode_24h);
+            }
+            // this is just temporary for testing: log a data point every 30 seconds.
+            if (date_time.unit.second % 30 == 0 && !logger_state->ts_ticks) {
+                _thermistor_logging_face_log_data(logger_state);
+                _thermistor_logging_face_update_display(logger_state, settings->bit.use_imperial_units, settings->bit.clock_mode_24h);
+            }
+            break;
+        default:
+            break;
+    }
+
+    return true;
+}
+
+void thermistor_logging_face_resign(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+}

movement/watch_faces/thermistor/thermistor_logging_face.h

@@ -0,0 +1,34 @@
+#ifndef THERMISTOR_LOGGING_FACE_H_
+#define THERMISTOR_LOGGING_FACE_H_
+
+#include "movement.h"
+#include "watch.h"
+
+#define THERMISTOR_LOGGING_NUM_DATA_POINTS (36)
+
+typedef struct {
+    watch_date_time timestamp;
+    float temperature_c;
+} thermistor_logger_data_point_t;
+
+typedef struct {
+    uint8_t display_index;  // the index we are displaying on screen
+    uint8_t ts_ticks;       // when the user taps the LIGHT button, we show the timestamp for a few ticks.
+    int32_t data_points;    // the absolute number of data points logged
+    thermistor_logger_data_point_t data[THERMISTOR_LOGGING_NUM_DATA_POINTS];
+} thermistor_logger_state_t;
+
+void thermistor_logging_face_setup(movement_settings_t *settings, void ** context_ptr);
+void thermistor_logging_face_activate(movement_settings_t *settings, void *context);
+bool thermistor_logging_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void thermistor_logging_face_resign(movement_settings_t *settings, void *context);
+
+static const watch_face_t thermistor_logging_face = {
+    thermistor_logging_face_setup,
+    thermistor_logging_face_activate,
+    thermistor_logging_face_loop,
+    thermistor_logging_face_resign,
+    NULL
+};
+
+#endif // THERMISTOR_LOGGING_FACE_H_