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authorJoey Castillo <jose.castillo@gmail.com>2021-09-16 15:40:01 -0400
committerJoey Castillo <jose.castillo@gmail.com>2021-09-16 15:40:01 -0400
commit07420e6ead840973d7136222b8e872261a7b18b8 (patch)
tree72c8af88f945c0d4f8b2a3b467994ccc8cc7bfd8 /Sensor Watch Starter Project/app.c
parentb3de08343b7db4ed380cdfa3ca0df824728999b1 (diff)
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move apps to subdirectory, add relative path support to Makefile
Diffstat (limited to 'Sensor Watch Starter Project/app.c')
-rw-r--r--Sensor Watch Starter Project/app.c195
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diff --git a/Sensor Watch Starter Project/app.c b/Sensor Watch Starter Project/app.c
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-#include <stdio.h>
-#include <string.h>
-#include "watch.h"
-
-//////////////////////////////////////////////////////////////////////////////////////////
-// This section sets up types and storage for our application state.
-// You can tear this out and replace it with whatever you want.
-typedef enum ApplicationMode {
- MODE_HELLO = 0,
- MODE_THERE
-} ApplicationMode;
-
-typedef enum LightColor {
- COLOR_RED = 0,
- COLOR_GREEN,
- COLOR_YELLOW
-} LightColor;
-
-typedef struct ApplicationState {
- ApplicationMode mode;
- LightColor color;
- bool light_on;
- uint8_t wake_count;
- bool enter_deep_sleep;
-} ApplicationState;
-
-ApplicationState application_state;
-
-
-//////////////////////////////////////////////////////////////////////////////////////////
-// This section defines the callbacks for our button press events (implemented at bottom).
-// Add any other callbacks you may need either here or in another file.
-void cb_light_pressed();
-void cb_mode_pressed();
-void cb_alarm_pressed();
-
-
-//////////////////////////////////////////////////////////////////////////////////////////
-// This section contains the required functions for any watch app. You should tear out
-// all the code in these functions when writing your app, but you must implement all
-// of the functions, even if they are empty stubs. You can also replace the documentation
-// lines with documentation that describes what your functions do!
-
-/**
- * @brief the app_init function is called before anything else. Use it to set up any
- * internal data structures or application state required by your app.
- */
-void app_init() {
- memset(&application_state, 0, sizeof(application_state));
-}
-
-/**
- * @brief the app_wake_from_deep_sleep function is only called if your app is waking from
- * the ultra-low power BACKUP sleep mode. You may have chosen to store some state in the
- * RTC's backup registers prior to entering this mode. You may restore that state here.
- *
- * @see watch_enter_deep_sleep()
- */
-void app_wake_from_deep_sleep() {
- // retrieve our application state from the backup registers
- application_state.mode = (ApplicationMode)watch_get_backup_data(0);
- application_state.color = (LightColor)watch_get_backup_data(1);
- application_state.wake_count = (uint8_t)watch_get_backup_data(2) + 1;
-}
-
-/**
- * @brief the app_setup 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.) Depending on your application, you may or may not
- * want to configure sensors on your sensor board here. For example, a low-power
- * accelerometer that will run at all times should be configured here, whereas you may
- * want to enable a more power-hungry environmental sensor only when you need it.
- *
- * @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_setup() {
- watch_enable_leds();
-
- watch_enable_external_interrupts();
- // This starter app demonstrates three different ways of using the button interrupts.
- // The BTN_MODE interrupt only triggers on a rising edge, so the mode changes once per press.
- watch_register_interrupt_callback(BTN_MODE, cb_mode_pressed, INTERRUPT_TRIGGER_RISING);
- // The BTN_LIGHT interrupt triggers on both rising and falling edges. The callback then checks
- // the pin state when triggered: on a button down event, it increments the color and turns the
- // LED on, whereas on a button up event, it turns the light off.
- watch_register_interrupt_callback(BTN_LIGHT, cb_light_pressed, INTERRUPT_TRIGGER_BOTH);
- // The BTN_ALARM callback is on an external wake pin; we can avoid using the EIC for this pin
- // by using the extwake interrupt — but note that it can only trigger on either a rising or
- // a falling edge, not both.
- watch_register_extwake_callback(BTN_ALARM, cb_alarm_pressed, true);
-
- 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() {
- application_state.wake_count++;
-}
-
-/**
- * @brief the app_loop function is called once on app startup and then again each time
- * the watch STANDBY sleep mode.
- */
-bool app_loop() {
- // set the LED to a color
- if (application_state.light_on) {
- switch (application_state.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;
- }
- } else {
- watch_set_led_off();
- }
-
- // Display the number of times we've woken up (modulo 32 to fit in 2 digits at top right)
- char buf[3] = {0};
- sprintf(buf, "%2d", application_state.wake_count % 32);
- watch_display_string(buf, 2);
-
- // display "Hello there" text
- switch (application_state.mode) {
- case MODE_HELLO:
- watch_display_string("Hello", 5);
- break;
- case MODE_THERE:
- watch_display_string("there", 5);
- break;
- }
-
- if (application_state.enter_deep_sleep) {
- application_state.enter_deep_sleep = false;
-
- // stash our application state in the backup registers
- watch_store_backup_data((uint32_t)application_state.mode, 0);
- watch_store_backup_data((uint32_t)application_state.color, 1);
- watch_store_backup_data((uint32_t)application_state.wake_count, 2);
-
- // turn off the LED
- watch_set_led_off();
-
- // wait a moment for the user's finger to be off the button
- delay_ms(1000);
-
- // nap time :)
- watch_enter_deep_sleep();
- }
-
- return true;
-}
-
-
-//////////////////////////////////////////////////////////////////////////////////////////
-// Implementations for our callback functions. Replace these with whatever functionality
-// your app requires.
-void cb_light_pressed() {
- // always turn the light off when the pin goes low
- if (watch_get_pin_level(BTN_LIGHT) == 0) {
- application_state.light_on = false;
- return;
- }
- application_state.color = (application_state.color + 1) % 3;
- application_state.light_on = true;
-}
-
-void cb_mode_pressed() {
- application_state.mode = (application_state.mode + 1) % 2;
-}
-
-void cb_alarm_pressed() {
- // boo: http://ww1.microchip.com/downloads/en/DeviceDoc/SAM_L22_Family_Errata_DS80000782B.pdf
- // Reference 15010. doesn't say it applies to PA02 but it seems it does?
- // anyway can't deep sleep now :(
- // application_state.enter_deep_sleep = true;
-}