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-rw-r--r--apps/Sensor Watch BME280 Project/app.c380
1 files changed, 0 insertions, 380 deletions
diff --git a/apps/Sensor Watch BME280 Project/app.c b/apps/Sensor Watch BME280 Project/app.c
deleted file mode 100644
index 85439d9b..00000000
--- a/apps/Sensor Watch BME280 Project/app.c
+++ /dev/null
@@ -1,380 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-#include <math.h>
-#include "watch.h"
-#include "bme280.h"
-
-#include "app.h"
-
-ApplicationState application_state;
-char buf[16] = {0};
-
-/**
- * @brief Zeroes out the application state struct.
- */
-void app_init() {
- memset(&application_state, 0, sizeof(application_state));
-}
-
-void app_wake_from_backup() {
- // This app does not support BACKUP mode.
-}
-
-void app_setup() {
- watch_enable_external_interrupts();
- watch_register_interrupt_callback(BTN_MODE, cb_mode_pressed, INTERRUPT_TRIGGER_RISING);
- watch_register_interrupt_callback(BTN_LIGHT, cb_light_pressed, INTERRUPT_TRIGGER_RISING);
- watch_register_extwake_callback(BTN_ALARM, cb_alarm_pressed, true);
-
- watch_enable_buzzer();
- watch_enable_leds();
-
- // pin A0 powers the sensor on this board.
- watch_enable_digital_output(A0);
- watch_set_pin_level(A0, true);
- delay_ms(10);
-
- watch_enable_i2c();
-
- watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_SOFTRESET, BME280_SOFT_RESET_CODE);
- delay_ms(10);
- application_state.dig_T1 = watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_DIG_T1);
- application_state.dig_T2 = (int16_t)watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_DIG_T2);
- application_state.dig_T3 = (int16_t)watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_DIG_T3);
- application_state.dig_H1 = watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H1);
- application_state.dig_H2 = (int16_t)watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_DIG_H2);
- application_state.dig_H3 = watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H3);
- application_state.dig_H4 = ((int8_t)watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H4) << 4) |
- (watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H4 + 1) & 0xF);
- application_state.dig_H5 = ((int8_t)watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H5 + 1) << 4) |
- (watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H5) >> 4);
- application_state.dig_H6 = (int8_t)watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H6);
-
- watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL_HUMID, BME280_CONTROL_HUMID_SAMPLING_NONE);
- watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL, BME280_CONTROL_TEMPERATURE_SAMPLING_X16 |
- BME280_CONTROL_PRESSURE_SAMPLING_NONE |
- BME280_CONTROL_MODE_FORCED);
-
- watch_enable_display();
-
- watch_rtc_register_tick_callback(cb_tick);
-}
-
-/**
- * Nothing to do here.
- */
-void app_prepare_for_standby() {
-}
-
-/**
- * @todo restore the BME280's calibration values from backup memory
- */
-void app_wake_from_standby() {
-}
-
-/**
- * Displays the temperature and humidity on screen, or a string indicating no measurements are being taken.
- */
-bool app_loop() {
- // play a beep if the mode has changed in response to a user's press of the MODE button
- if (application_state.mode_changed) {
- // low note for nonzero case, high note for return to clock
- watch_buzzer_play_note(application_state.mode ? BUZZER_NOTE_C7 : BUZZER_NOTE_C8, 100);
- application_state.mode_changed = false;
- }
-
- // If the user is not in clock mode and the mode timeout has expired, return them to clock mode
- if (application_state.mode != MODE_CLOCK && application_state.mode_ticks == 0) {
- application_state.mode = MODE_CLOCK;
- application_state.mode_changed = true;
- }
-
- // If the LED is off and should be on, turn it on
- if (application_state.light_ticks > 0 && !application_state.led_on) {
- watch_set_led_green();
- application_state.led_on = true;
- }
-
- // if the LED is on and should be off, turn it off
- if (application_state.led_on && application_state.light_ticks == 0) {
- // unless the user is holding down the LIGHT button, in which case, give them more time.
- if (watch_get_pin_level(BTN_LIGHT)) {
- application_state.light_ticks = 3;
- } else {
- watch_set_led_off();
- application_state.led_on = false;
- }
- }
-
- switch (application_state.mode) {
- case MODE_CLOCK:
- do_clock_mode();
- break;
- case MODE_TEMP:
- do_temp_mode();
- break;
- case MODE_LOG:
- do_log_mode();
- break;
- case MODE_PREFS:
- do_prefs_mode();
- break;
- case MODE_SET:
- do_set_time_mode();
- break;
- case NUM_MODES:
- // dummy case, just silences a warning
- break;
- }
-
- application_state.mode_changed = false;
-
- return true;
-}
-
-/**
- * Reads the temperature from the BME280
- * @param p_t_fine - an optional pointer to an int32_t; if provided, the t_fine measurement
- * (required for humidity calculation) will be returned by reference.
- * Pass in NULL if you do not care about this value.
- * @return a float indicating the temperature in degrees celsius.
- */
-float read_temperature(int32_t *p_t_fine) {
- // read24 reads the bytes into a uint32 which works for little-endian values (MSB is 0)
- uint32_t raw_data = watch_i2c_read24(BME280_ADDRESS, BME280_REGISTER_TEMP_DATA) >> 8;
- // alas the sensor's register layout is big-endian-ish, with a nibble of zeroes at the end of the LSB.
- // this line shuffles everything back into place (swaps LSB and MSB and shifts the zeroes off the end)
- int32_t adc_value = (((raw_data >> 16) | (raw_data & 0xFF00) | (raw_data << 16)) & 0xFFFFFF) >> 4;
-
- // this bit is cribbed from Adafruit's BME280 driver. support their open source efforts by buying some stuff!
- int32_t var1 = ((((adc_value >> 3) - ((int32_t)application_state.dig_T1 << 1))) * ((int32_t)application_state.dig_T2)) >> 11;
- int32_t var2 = (((((adc_value >> 4) - ((int32_t)application_state.dig_T1)) * ((adc_value >> 4) - ((int32_t)application_state.dig_T1))) >> 12) * ((int32_t)application_state.dig_T3)) >> 14;
- int32_t t_fine = var1 + var2;
-
- // if we got a pointer to a t_fine, return it by reference (for humidity calculation).
- if (p_t_fine != NULL) *p_t_fine = t_fine;
-
- if (application_state.is_fahrenheit) {
- return (((t_fine * 5 + 128) >> 8) / 100.0) * 1.8 + 32;
- } else {
- return ((t_fine * 5 + 128) >> 8) / 100.0;
- }
-}
-
-/**
- * Reads the humidity from the BME280
- * @param t_fine - the t_fine measurement from a call to read_temperature
- * @return a float indicating the relative humidity as a percentage from 0-100.
- * @todo the returned value is glitchy, need to fix.
- */
-float read_humidity(int32_t t_fine) {
- int32_t adc_value = watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_HUMID_DATA);
-
- // again, cribbed from Adafruit's BME280 driver. they sell a great breakout board for this sensor!
- int32_t v_x1_u32r = (t_fine - ((int32_t)76800));
- v_x1_u32r = (((((adc_value << 14) - (((int32_t)application_state.dig_H4) << 20) - (((int32_t)application_state.dig_H5) * v_x1_u32r)) +
- ((int32_t)16384)) >> 15) * (((((((v_x1_u32r * ((int32_t)application_state.dig_H6)) >> 10) * (((v_x1_u32r * ((int32_t)application_state.dig_H3)) >> 11) +
- ((int32_t)32768))) >> 10) + ((int32_t)2097152)) * ((int32_t)application_state.dig_H2) + 8192) >> 14));
- v_x1_u32r = (v_x1_u32r - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7) * ((int32_t)application_state.dig_H1)) >> 4));
- v_x1_u32r = (v_x1_u32r < 0) ? 0 : v_x1_u32r;
- v_x1_u32r = (v_x1_u32r > 419430400) ? 419430400 : v_x1_u32r;
- float h = (v_x1_u32r >> 12);
-
- return h / 1024.0;
-}
-
-void log_data() {
- watch_date_time date_time = watch_rtc_get_date_time();
- uint8_t hour = date_time.unit.hour;
- int8_t temperature = read_temperature(NULL);
-
- for(int i = 0; i < MAX_DATA_POINTS - 1; i++) {
- application_state.logged_data[i] = application_state.logged_data[i + 1];
- }
- application_state.logged_data[MAX_DATA_POINTS - 1].is_valid = true;
- application_state.logged_data[MAX_DATA_POINTS - 1].hour = hour;
- application_state.logged_data[MAX_DATA_POINTS - 1].temperature = temperature;
-}
-
-void do_clock_mode() {
- watch_date_time date_time = watch_rtc_get_date_time();
- const char months[12][3] = {"JA", "FE", "MR", "AR", "MA", "JN", "JL", "AU", "SE", "OC", "NO", "dE"};
-
- watch_display_string((char *)months[date_time.unit.month - 1], 0);
- sprintf(buf, "%2d%2d%02d%02d", date_time.unit.day, date_time.unit.hour, date_time.unit.minute, date_time.unit.second);
- watch_display_string(buf, 2);
- watch_set_colon();
-}
-
-void do_temp_mode() {
- int32_t t_fine;
- float temperature;
- float humidity;
-
- // take one reading
- watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL, BME280_CONTROL_TEMPERATURE_SAMPLING_X16 |
- BME280_CONTROL_MODE_FORCED);
- // wait for reading to finish
- while(watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_STATUS) & BME280_STATUS_UPDATING_MASK);
- temperature = read_temperature(&t_fine);
- humidity = read_humidity(t_fine);
- if (application_state.show_humidity) {
- sprintf(buf, "TE%2d%4.1f#%c", (int)(humidity / 10), temperature, application_state.is_fahrenheit ? 'F' : 'C');
- } else {
- sprintf(buf, "TE %4.1f#%c", temperature, application_state.is_fahrenheit ? 'F' : 'C');
- }
- watch_display_string(buf, 0);
- watch_clear_colon();
-}
-
-void do_log_mode() {
- bool is_valid = (uint8_t)(application_state.logged_data[MAX_DATA_POINTS - 1 - application_state.page].is_valid);
- uint8_t hour = (uint8_t)(application_state.logged_data[MAX_DATA_POINTS - 1 - application_state.page].hour);
- int8_t temperature = (int8_t)(application_state.logged_data[MAX_DATA_POINTS - 1 - application_state.page].temperature);
- if (!is_valid) {
- sprintf(buf, "LO%2d------", application_state.page);
- watch_clear_colon();
- } else {
- sprintf(buf, "LO%2d%2d%4d", application_state.page, hour, temperature);
- watch_set_colon();
- }
- watch_display_string(buf, 0);
-}
-
-void log_mode_handle_primary_button() {
- application_state.page++;
- if (application_state.page == MAX_DATA_POINTS) application_state.page = 0;
-}
-
-void do_prefs_mode() {
- sprintf(buf, "PR CorF %c", application_state.is_fahrenheit ? 'F' : 'C');
- watch_display_string(buf, 0);
- watch_clear_colon();
-}
-
-void prefs_mode_handle_primary_button() {
- // TODO: add rest of preferences (12/24, humidity, LED color, etc.)
- // for now only one, C or F
-}
-
-void prefs_mode_handle_secondary_button() {
- application_state.is_fahrenheit = !application_state.is_fahrenheit;
-}
-
-void do_set_time_mode() {
- watch_date_time date_time = watch_rtc_get_date_time();
-
- watch_display_string(" ", 0);
- switch (application_state.page) {
- case 0: // hour
- sprintf(buf, "ST t%2d", date_time.unit.hour);
- break;
- case 1: // minute
- sprintf(buf, "ST t %02d", date_time.unit.minute);
- break;
- case 2: // second
- sprintf(buf, "ST t %02d", date_time.unit.second);
- break;
- case 3: // year
- sprintf(buf, "ST d%2d", date_time.unit.year + 20);
- break;
- case 4: // month
- sprintf(buf, "ST d %02d", date_time.unit.month);
- break;
- case 5: // day
- sprintf(buf, "ST d %02d", date_time.unit.day);
- break;
- }
- watch_display_string(buf, 0);
- watch_set_pixel(1, 12); // required for T in position 1
-}
-
-void set_time_mode_handle_primary_button() {
- application_state.page++;
- if (application_state.page == 6) application_state.page = 0;
-}
-
-void set_time_mode_handle_secondary_button() {
- watch_date_time date_time = watch_rtc_get_date_time();
- const uint8_t days_in_month[12] = {31, 28, 31, 30, 31, 30, 30, 31, 30, 31, 30, 31};
-
- switch (application_state.page) {
- case 0: // hour
- date_time.unit.hour = (date_time.unit.hour + 1) % 24;
- break;
- case 1: // minute
- date_time.unit.minute = (date_time.unit.minute + 1) % 60;
- break;
- case 2: // second
- date_time.unit.second = 0;
- break;
- case 3: // year
- // only allow 2021-2030. fix this sometime next decade
- date_time.unit.year = ((date_time.unit.year % 10) + 1);
- break;
- case 4: // month
- date_time.unit.month = ((date_time.unit.month + 1) % 12);
- break;
- case 5: // day
- date_time.unit.day = date_time.unit.day + 1;
- // can't set to the 29th on a leap year. if it's february 29, set to 11:59 on the 28th.
- // and it should roll over.
- if (date_time.unit.day > days_in_month[date_time.unit.month - 1]) {
- date_time.unit.day = 1;
- }
- break;
- }
- watch_rtc_set_date_time(date_time);
-}
-
-void cb_mode_pressed() {
- application_state.mode = (application_state.mode + 1) % NUM_MODES;
- application_state.mode_changed = true;
- application_state.mode_ticks = 300;
- application_state.page = 0;
-}
-
-void cb_light_pressed() {
- switch (application_state.mode) {
- case MODE_PREFS:
- prefs_mode_handle_secondary_button();
- break;
- case MODE_SET:
- set_time_mode_handle_secondary_button();
- break;
- default:
- application_state.light_ticks = 3;
- break;
- }
-}
-
-void cb_alarm_pressed() {
- switch (application_state.mode) {
- case MODE_LOG:
- log_mode_handle_primary_button();
- break;
- case MODE_PREFS:
- prefs_mode_handle_primary_button();
- break;
- case MODE_SET:
- set_time_mode_handle_primary_button();
- break;
- default:
- break;
- }
-}
-
-void cb_tick() {
- // TODO: use alarm interrupt to trigger data acquisition.
- watch_date_time date_time = watch_rtc_get_date_time();
- if (date_time.unit.minute == 0 && date_time.unit.second == 0) {
- log_data();
- }
-
- if (application_state.light_ticks > 0) {
- application_state.light_ticks--;
- }
- if (application_state.mode_ticks > 0) {
- application_state.mode_ticks--;
- }
-}
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