1 files changed, 100 insertions, 0 deletions
diff --git a/Sensor Watch Starter Project/app.c b/Sensor Watch Starter Project/app.c
new file mode 100644
index 00000000..eb862767
--- /dev/null
+++ b/Sensor Watch Starter Project/app.c
@@ -0,0 +1,100 @@
+#include <stdio.h>
+#include <string.h>
+#include "app.h"
+
+// these are implemented in main.c, just want to have access to them here.
+void uart_putc(char c);
+void uart_puts(char *s);
+
+typedef enum ApplicationMode {
+    MODE_HELLO = 0,
+    MODE_THERE
+} ApplicationMode;
+
+typedef enum LightColor {
+    COLOR_OFF = 0,
+    COLOR_RED = 1,
+    COLOR_GREEN = 2,
+    COLOR_YELLOW = 3
+} LightColor;
+
+typedef struct ApplicationState {
+    ApplicationMode mode;
+    LightColor color;
+} ApplicationState;
+
+ApplicationState applicationState;
+
+void cb_light_pressed() {
+    applicationState.color = (applicationState.color + 1) % 4;
+}
+
+void cb_mode_pressed() {
+    applicationState.mode = (applicationState.mode + 1) % 2;
+}
+
+/**
+ * @brief the app_init function is like setup() in Arduino. It is called once when the
+ * program begins. You should set pin modes and enable any peripherals you want to
+ * set up (real-time clock, I2C, etc.)
+ * 
+ * @note If your app enters the ultra-low power BACKUP sleep mode, this function will 
+ * be called again when it wakes from that deep sleep state. In this state, the RTC will
+ * still be configured with the correct date and time.
+ */
+void app_init() {
+    memset(&applicationState, 0, sizeof(applicationState));
+
+    watch_enable_led(false);
+
+    watch_enable_buttons();
+    watch_register_button_callback(BTN_LIGHT, cb_light_pressed);
+    watch_register_button_callback(BTN_MODE, cb_mode_pressed);
+
+    watch_enable_display();
+}
+
+/**
+ * @brief the app_prepare_for_sleep function is called before the watch goes into the
+ * STANDBY sleep mode. In STANDBY mode, most peripherals are shut down, and no code
+ * will run until the watch receives an interrupt (generally either the 1Hz tick or
+ * a press on one of the buttons).
+ */
+void app_prepare_for_sleep() {
+}
+
+/**
+ * @brief the app_wake_from_sleep function is called after the watch wakes from the
+ * STANDBY sleep mode.
+ */
+void app_wake_from_sleep() {
+}
+
+/**
+ * @brief the app_loop function is called once on app startup and then again each time
+ * the watch STANDBY sleep mode.
+ */
+void app_loop() {
+    switch (applicationState.color) {
+        case COLOR_RED:
+            watch_set_led_red();
+            break;
+        case COLOR_GREEN:
+            watch_set_led_green();
+            break;
+        case COLOR_YELLOW:
+            watch_set_led_yellow();
+            break;
+        default:
+            applicationState.color = COLOR_OFF;
+            watch_set_led_off();
+    }
+    switch (applicationState.mode) {
+        case MODE_HELLO:
+            watch_display_string("Hello", 5);
+            break;
+        case MODE_THERE:
+            watch_display_string("there", 5);
+            break;
+    }
+}