movement: add experimental accelerometer data logging face

movement/make/Makefile

@@ -38,6 +38,7 @@ SRCS += \
   ../watch_faces/thermistor/thermistor_logging_face.c \
   ../watch_faces/demos/character_set_face.c \
   ../watch_faces/demos/voltage_face.c \
+  ../watch_faces/demos/lis2dh_logging_face.c \
   ../watch_faces/complications/beats_face.c \
   ../watch_faces/complications/day_one_face.c \
   ../watch_faces/complications/stopwatch_face.c \

movement/movement_config.h

@@ -14,6 +14,7 @@
 #include "voltage_face.h"
 #include "stopwatch_face.h"
 #include "totp_face.h"
+#include "lis2dh_logging_face.h"
 
 const watch_face_t watch_faces[] = {
     simple_clock_face,

movement/watch_faces/demos/lis2dh_logging_face.c

@@ -0,0 +1,147 @@
+#include <stdlib.h>
+#include <string.h>
+#include "lis2dh_logging_face.h"
+#include "lis2dh.h"
+#include "watch.h"
+
+// This watch face is just for testing; if we want to build accelerometer support, it will likely have to be part of Movement itself.
+// The watch face only logs events when it is on screen and not in low energy mode, so you should set LE mode to Never when using it
+// and make it the first watch face in the list (so we come back to it from other modes).
+// On an interrupt, it flashes the Signal icon, and displays the axis or axes that were over the threshold.
+// The main display contains, from left to right, the number of interrupt events that were detected in each of the last three minutes.
+// Pressing the alarm button enters the log mode, where the main display shows the number of interrupts detected in each of the last
+// 24 hours (the hour is shown in the top right digit and AM/PM indicator, if the clock is set to 12 hour mode)
+
+void _lis2dh_logging_face_log_data(lis2dh_logger_state_t *logger_state) {
+    watch_date_time date_time = watch_rtc_get_date_time();
+    size_t pos = logger_state->data_points % LIS2DH_LOGGING_NUM_DATA_POINTS;
+    logger_state->data[pos].timestamp.reg = date_time.reg;
+    logger_state->data[pos].interrupts = logger_state->interrupts_this_hour;
+    logger_state->data_points++;
+    logger_state->interrupts_this_hour = 0;
+}
+
+void lis2dh_logging_face_setup(movement_settings_t *settings, void ** context_ptr) {
+    (void) settings;
+    if (*context_ptr == NULL) {
+        *context_ptr = malloc(sizeof(lis2dh_logger_state_t));
+        memset(*context_ptr, 0, sizeof(lis2dh_logger_state_t));
+        gpio_set_pin_direction(A0, GPIO_DIRECTION_OUT);
+        gpio_set_pin_function(A0, GPIO_PIN_FUNCTION_OFF);
+        gpio_set_pin_level(A0, true);
+        watch_enable_i2c();
+        lis2dh_begin();
+        lis2dh_set_data_rate(LIS2DH_DATA_RATE_10_HZ);
+        lis2dh_configure_aoi_int1(
+            LIS2DH_INTERRUPT_CONFIGURATION_OR |
+            LIS2DH_INTERRUPT_CONFIGURATION_X_HIGH_ENABLE |
+            LIS2DH_INTERRUPT_CONFIGURATION_Y_HIGH_ENABLE |
+            LIS2DH_INTERRUPT_CONFIGURATION_Z_HIGH_ENABLE, 96, 0, true);
+    }
+}
+
+void lis2dh_logging_face_activate(movement_settings_t *settings, void *context) {
+    (void) settings;
+    lis2dh_logger_state_t *logger_state = (lis2dh_logger_state_t *)context;
+    logger_state->display_index = 0;
+    logger_state->log_ticks = 0;
+    watch_enable_digital_input(A1);
+}
+
+bool tick = false;
+
+bool lis2dh_logging_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
+    lis2dh_logger_state_t *logger_state = (lis2dh_logger_state_t *)context;
+    lis2dh_interrupt_state interrupt_state = 0;
+    watch_date_time date_time;
+    char buf[14];
+    char time_indication_character;
+    int8_t pos;
+
+    switch (event.event_type) {
+        case EVENT_MODE_BUTTON_UP:
+            movement_move_to_next_face();
+            break;
+        case EVENT_LIGHT_LONG_PRESS:
+            break;
+        case EVENT_LIGHT_BUTTON_DOWN:
+            break;
+        case EVENT_ALARM_BUTTON_UP:
+            if (logger_state->log_ticks) {
+                logger_state->display_index = (logger_state->display_index + 1) % LIS2DH_LOGGING_NUM_DATA_POINTS;
+            }
+            logger_state->log_ticks = 60;
+            // fall through
+        case EVENT_ACTIVATE:
+        case EVENT_TICK:
+            tick = !tick;
+            if (watch_get_pin_level(A1)) {
+                watch_set_indicator(WATCH_INDICATOR_SIGNAL);
+                interrupt_state = lis2dh_get_int1_state();
+                logger_state->interrupts[0]++;
+                logger_state->interrupts_this_hour++;
+            } else {
+                watch_clear_indicator(WATCH_INDICATOR_SIGNAL);
+            }
+            if (logger_state->log_ticks) {
+                pos = (logger_state->data_points - 1 - logger_state->display_index) % LIS2DH_LOGGING_NUM_DATA_POINTS;
+                if (pos < 0) {
+                    watch_clear_colon();
+                    sprintf(buf, "NO   data ");
+                } else {
+                    date_time = logger_state->data[pos].timestamp;
+                    watch_set_colon();
+                    if (settings->bit.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%2d1n%4ld", date_time.unit.hour, logger_state->data[pos].interrupts);
+                }
+            } else {
+                date_time = watch_rtc_get_date_time();
+                watch_clear_colon();
+                if ((59 - date_time.unit.second) < 10) time_indication_character = '0' + (59 - date_time.unit.second);
+                else time_indication_character = (date_time.unit.second % 2) ? 'i' : '_';
+                sprintf(buf, "%c%c%c%c%2d%2d%2d",
+                    (interrupt_state & LIS2DH_INTERRUPT_STATE_Y_HIGH) ? 'Y' : ' ',
+                    (interrupt_state & LIS2DH_INTERRUPT_STATE_X_HIGH) ? 'X' : ' ',
+                    (interrupt_state & LIS2DH_INTERRUPT_STATE_Z_HIGH) ? '2' : ' ',
+                    time_indication_character,
+                    logger_state->interrupts[0],
+                    logger_state->interrupts[1],
+                    logger_state->interrupts[2]);
+            }
+
+            watch_display_string(buf, 0);
+            break;
+        case EVENT_BACKGROUND_TASK:
+            _lis2dh_logging_face_log_data(logger_state);
+            break;
+        default:
+            break;
+    }
+
+    return true;
+}
+
+void lis2dh_logging_face_resign(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+    watch_disable_digital_input(A1);
+}
+
+bool lis2dh_logging_face_wants_background_task(movement_settings_t *settings, void *context) {
+    (void) settings;
+    lis2dh_logger_state_t *logger_state = (lis2dh_logger_state_t *)context;
+
+    // this is kind of an abuse of the API, but, let's use the 1 minute tick to shift all our data over.
+    logger_state->interrupts[2] = logger_state->interrupts[1];
+    logger_state->interrupts[1] = logger_state->interrupts[0];
+    logger_state->interrupts[0] = 0;
+
+    // and do our logging task at the top of the hour
+    return watch_rtc_get_date_time().unit.minute == 0;
+}

movement/watch_faces/demos/lis2dh_logging_face.h

@@ -0,0 +1,37 @@
+#ifndef LIS2DH_LOGGING_FACE_H_
+#define LIS2DH_LOGGING_FACE_H_
+
+#include "movement.h"
+#include "watch.h"
+
+#define LIS2DH_LOGGING_NUM_DATA_POINTS (24)
+
+typedef struct {
+    watch_date_time timestamp;
+    uint32_t interrupts;
+} lis2dh_logger_data_point_t;
+
+typedef struct {
+    uint8_t display_index;  // the index we are displaying on screen
+    uint8_t log_ticks;      // when the user taps the ALARM button, we enter log mode
+    int32_t data_points;    // the absolute number of data points logged
+    uint8_t interrupts[3];  // the number of interrupts we have logged in each of the last 3 minutes
+    uint32_t interrupts_this_hour;  // the number of interrupts we have logged in the last hour
+    lis2dh_logger_data_point_t data[LIS2DH_LOGGING_NUM_DATA_POINTS];
+} lis2dh_logger_state_t;
+
+void lis2dh_logging_face_setup(movement_settings_t *settings, void ** context_ptr);
+void lis2dh_logging_face_activate(movement_settings_t *settings, void *context);
+bool lis2dh_logging_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void lis2dh_logging_face_resign(movement_settings_t *settings, void *context);
+bool lis2dh_logging_face_wants_background_task(movement_settings_t *settings, void *context);
+
+static const watch_face_t lis2dh_logging_face = {
+    lis2dh_logging_face_setup,
+    lis2dh_logging_face_activate,
+    lis2dh_logging_face_loop,
+    lis2dh_logging_face_resign,
+    lis2dh_logging_face_wants_background_task
+};
+
+#endif // LIS2DH_LOGGING_FACE_H_