mirror of
https://github.com/firewalkwithm3/Sensor-Watch.git
synced 2024-11-22 19:20:30 +08:00
add data logging, more modes to BME280 project
This commit is contained in:
Joey Castillo
parent
ecf853da6d
commit
8f0aeb0217
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@ -1,38 +1,13 @@
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include "watch.h"
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#include "bme280.h"
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typedef enum ApplicationMode {
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MODE_TEMPERATURE = 0,
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MODE_HUMIDITY,
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MODE_OFF,
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} ApplicationMode;
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typedef struct ApplicationState {
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ApplicationMode mode;
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int light_ticks;
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bool led_on;
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bool needs_beep;
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uint16_t dig_T1;
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int16_t dig_T2;
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int16_t dig_T3;
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uint8_t dig_H1;
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int16_t dig_H2;
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uint8_t dig_H3;
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int16_t dig_H4;
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int16_t dig_H5;
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int8_t dig_H6;
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} ApplicationState;
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#include "app.h"
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ApplicationState application_state;
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void cb_light_pressed();
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void cb_mode_pressed();
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void cb_tick();
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float read_temperature(int32_t *p_t_fine);
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float read_humidity(int32_t t_fine);
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char buf[16] = {0};
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/**
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* @brief Zeroes out the application state struct.
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@ -41,19 +16,22 @@ void app_init() {
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memset(&application_state, 0, sizeof(application_state));
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}
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/**
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* @todo stash the BME280's calibration values in backup memory so we don't have to ask again
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*/
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void app_wake_from_deep_sleep() {
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// This app does not support deep sleep mode.
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}
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/**
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* Enables the MODE button, the display and the sensor, and grabs calibration data.
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*/
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void app_setup() {
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struct calendar_date_time date_time;
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watch_get_date_time(&date_time);
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if (date_time.date.year < 2020) {
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date_time.date.year = 2020;
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watch_set_date_time(date_time);
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}
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watch_enable_buttons();
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watch_register_button_callback(BTN_MODE, cb_mode_pressed);
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watch_register_button_callback(BTN_LIGHT, cb_light_pressed);
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watch_register_button_callback(BTN_ALARM, cb_alarm_pressed);
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watch_enable_buzzer();
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watch_enable_led(false);
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@ -79,7 +57,7 @@ void app_setup() {
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(watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H5) >> 4);
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application_state.dig_H6 = (int8_t)watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H6);
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watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL_HUMID, BME280_CONTROL_HUMID_SAMPLING_X16);
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watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL_HUMID, BME280_CONTROL_HUMID_SAMPLING_NONE);
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watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL, BME280_CONTROL_TEMPERATURE_SAMPLING_X16 |
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BME280_CONTROL_PRESSURE_SAMPLING_NONE |
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BME280_CONTROL_MODE_FORCED);
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@ -105,22 +83,28 @@ void app_wake_from_sleep() {
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* Displays the temperature and humidity on screen, or a string indicating no measurements are being taken.
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*/
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bool app_loop() {
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int32_t t_fine;
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float temperature;
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float humidity;
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char buf[11] = {0};
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if (application_state.needs_beep) {
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watch_buzzer_play_note(BUZZER_NOTE_A6, 100);
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application_state.needs_beep = false;
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// play a beep if the mode has changed in response to a user's press of the MODE button
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if (application_state.mode_changed) {
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// low note for nonzero case, high note for return to clock
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watch_buzzer_play_note(application_state.mode ? BUZZER_NOTE_C7 : BUZZER_NOTE_C8, 100);
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application_state.mode_changed = false;
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}
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// If the user is not in clock mode and the mode timeout has expired, return them to clock mode
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if (application_state.mode != MODE_CLOCK && application_state.mode_ticks == 0) {
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application_state.mode = MODE_CLOCK;
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application_state.mode_changed = true;
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}
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// If the LED is off and should be on, turn it on
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if (application_state.light_ticks > 0 && !application_state.led_on) {
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watch_set_led_yellow();
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watch_set_led_green();
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application_state.led_on = true;
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}
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// if the LED is on and should be off, turn it off
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if (application_state.led_on && application_state.light_ticks == 0) {
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// unless the user is holding down the LIGHT button, in which case, give them more time.
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if (watch_get_pin_level(BTN_LIGHT)) {
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application_state.light_ticks = 3;
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} else {
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@ -130,34 +114,31 @@ bool app_loop() {
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}
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switch (application_state.mode) {
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case MODE_TEMPERATURE:
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// take one reading
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watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL, BME280_CONTROL_TEMPERATURE_SAMPLING_X16 |
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BME280_CONTROL_MODE_FORCED);
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// wait for reading to finish
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while(watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_STATUS) & BME280_STATUS_UPDATING_MASK);
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temperature = read_temperature(NULL);
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sprintf(buf, "TE %4.1f#C", temperature);
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watch_display_string(buf, 0);
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watch_clear_colon();
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case MODE_CLOCK:
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do_clock_mode();
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break;
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case MODE_HUMIDITY:
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// take one reading
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watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL, BME280_CONTROL_TEMPERATURE_SAMPLING_X16 |
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BME280_CONTROL_MODE_FORCED);
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// wait for reading to finish
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while(watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_STATUS) & BME280_STATUS_UPDATING_MASK);
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temperature = read_temperature(&t_fine);
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humidity = read_humidity(t_fine);
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sprintf(buf, "HU rH %3d", (int)humidity);
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watch_display_string(buf, 0);
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watch_set_colon();
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case MODE_TEMP:
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do_temp_mode();
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break;
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case MODE_LOG:
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do_log_mode();
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break;
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case MODE_PREFS:
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do_prefs_mode();
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break;
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case MODE_SET:
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do_set_time_mode();
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break;
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case NUM_MODES:
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// dummy case, just silences a warning
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break;
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case MODE_OFF:
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watch_display_string(" Sleep ", 0);
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watch_clear_pixel(1, 16);
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}
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application_state.mode_changed = false;
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delay_ms(250);
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application_state.debounce_wait = false;
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return true;
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}
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@ -183,7 +164,11 @@ float read_temperature(int32_t *p_t_fine) {
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// if we got a pointer to a t_fine, return it by reference (for humidity calculation).
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if (p_t_fine != NULL) *p_t_fine = t_fine;
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return ((t_fine * 5 + 128) >> 8) / 100.0;
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if (application_state.is_fahrenheit) {
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return (((t_fine * 5 + 128) >> 8) / 100.0) * 1.8 + 32;
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} else {
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return ((t_fine * 5 + 128) >> 8) / 100.0;
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}
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}
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/**
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@ -208,17 +193,212 @@ float read_humidity(int32_t t_fine) {
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return h / 1024.0;
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}
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void cb_mode_pressed() {
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application_state.mode = (application_state.mode + 1) % 3;
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application_state.needs_beep = true;
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void log_data() {
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struct calendar_date_time date_time;
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watch_get_date_time(&date_time);
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uint8_t hour = date_time.time.sec;
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int8_t temperature = read_temperature(NULL);
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for(int i = 0; i < MAX_DATA_POINTS - 1; i++) {
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application_state.logged_data[i] = application_state.logged_data[i + 1];
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}
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application_state.logged_data[MAX_DATA_POINTS - 1].is_valid = true;
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application_state.logged_data[MAX_DATA_POINTS - 1].hour = hour;
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application_state.logged_data[MAX_DATA_POINTS - 1].temperature = temperature;
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}
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void cb_tick() {
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if (application_state.light_ticks > 0) {
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application_state.light_ticks--;
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void do_clock_mode() {
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struct calendar_date_time date_time;
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const char months[12][3] = {"JA", "FE", "MR", "AR", "MA", "JN", "JL", "AU", "SE", "OC", "NO", "dE"};
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watch_get_date_time(&date_time);
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watch_display_string((char *)months[date_time.date.month - 1], 0);
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sprintf(buf, "%2d%2d%02d%02d", date_time.date.day, date_time.time.hour, date_time.time.min, date_time.time.sec);
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watch_display_string(buf, 2);
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watch_set_colon();
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}
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void do_temp_mode() {
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int32_t t_fine;
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float temperature;
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float humidity;
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// take one reading
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watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_CONTROL, BME280_CONTROL_TEMPERATURE_SAMPLING_X16 |
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BME280_CONTROL_MODE_FORCED);
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// wait for reading to finish
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while(watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_STATUS) & BME280_STATUS_UPDATING_MASK);
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temperature = read_temperature(&t_fine);
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humidity = read_humidity(t_fine);
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if (application_state.show_humidity) {
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sprintf(buf, "TE%2d%4.1f#%c", (int)(humidity / 10), temperature), application_state.is_fahrenheit ? 'F' : 'C';
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} else {
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sprintf(buf, "TE %4.1f#%c", temperature, application_state.is_fahrenheit ? 'F' : 'C');
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}
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watch_display_string(buf, 0);
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watch_clear_colon();
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}
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void do_log_mode() {
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bool is_valid = (uint8_t)(application_state.logged_data[MAX_DATA_POINTS - 1 - application_state.page].is_valid);
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uint8_t hour = (uint8_t)(application_state.logged_data[MAX_DATA_POINTS - 1 - application_state.page].hour);
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int8_t temperature = (int8_t)(application_state.logged_data[MAX_DATA_POINTS - 1 - application_state.page].temperature);
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if (!is_valid) {
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sprintf(buf, "LO%2d------", application_state.page);
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watch_clear_colon();
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} else {
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sprintf(buf, "LO%2d%2d%4d", application_state.page, hour, temperature);
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watch_set_colon();
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}
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watch_display_string(buf, 0);
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}
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void log_mode_handle_primary_button() {
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application_state.page++;
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if (application_state.page == MAX_DATA_POINTS) application_state.page = 0;
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}
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void do_prefs_mode() {
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sprintf(buf, "PR CorF %c", application_state.is_fahrenheit ? 'F' : 'C');
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watch_display_string(buf, 0);
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watch_clear_colon();
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}
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void prefs_mode_handle_primary_button() {
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// TODO: add rest of preferences (12/24, humidity, LED color, etc.)
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// for now only one, C or F
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}
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void prefs_mode_handle_secondary_button() {
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application_state.is_fahrenheit = !application_state.is_fahrenheit;
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}
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void do_set_time_mode() {
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struct calendar_date_time date_time;
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watch_get_date_time(&date_time);
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watch_display_string(" ", 0);
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switch (application_state.page) {
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case 0: // hour
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sprintf(buf, "ST t%2d", date_time.time.hour);
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break;
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case 1: // minute
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sprintf(buf, "ST t %02d", date_time.time.min);
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break;
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case 2: // second
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sprintf(buf, "ST t %02d", date_time.time.sec);
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break;
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case 3: // year
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sprintf(buf, "ST d%2d", date_time.date.year - 2000);
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break;
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case 4: // month
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sprintf(buf, "ST d %02d", date_time.date.month);
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break;
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case 5: // day
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sprintf(buf, "ST d %02d", date_time.date.day);
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break;
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}
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watch_display_string(buf, 0);
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watch_set_pixel(1, 12); // required for T in position 1
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}
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void set_time_mode_handle_primary_button() {
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application_state.page++;
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if (application_state.page == 6) application_state.page = 0;
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}
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void set_time_mode_handle_secondary_button() {
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struct calendar_date_time date_time;
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watch_get_date_time(&date_time);
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const uint8_t days_in_month[12] = {31, 28, 31, 30, 31, 30, 30, 31, 30, 31, 30, 31};
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switch (application_state.page) {
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case 0: // hour
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date_time.time.hour = (date_time.time.hour + 1) % 24;
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break;
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case 1: // minute
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date_time.time.min = (date_time.time.min + 1) % 60;
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break;
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case 2: // second
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date_time.time.sec = 0;
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break;
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case 3: // year
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// only allow 2021-2030. fix this sometime next decade
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date_time.date.year = ((date_time.date.year % 10) + 1) + 2020;
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break;
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case 4: // month
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date_time.date.month = ((date_time.date.month + 1) % 12);
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break;
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case 5: // day
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date_time.date.day = date_time.date.day + 1;
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// can't set to the 29th on a leap year. if it's february 29, set to 11:59 on the 28th.
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// and it should roll over.
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if (date_time.date.day > days_in_month[date_time.date.month - 1]) {
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date_time.date.day = 1;
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}
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break;
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}
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watch_set_date_time(date_time);
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}
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void cb_mode_pressed() {
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if (application_state.debounce_wait) return;
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application_state.debounce_wait = true;
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application_state.mode = (application_state.mode + 1) % NUM_MODES;
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application_state.mode_changed = true;
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application_state.mode_ticks = 300;
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application_state.page = 0;
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}
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void cb_light_pressed() {
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application_state.light_ticks = 3;
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if (application_state.debounce_wait) return;
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application_state.debounce_wait = true;
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switch (application_state.mode) {
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case MODE_PREFS:
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prefs_mode_handle_secondary_button();
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break;
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case MODE_SET:
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set_time_mode_handle_secondary_button();
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break;
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default:
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application_state.light_ticks = 3;
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break;
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}
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}
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void cb_alarm_pressed() {
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if (application_state.debounce_wait) return;
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application_state.debounce_wait = true;
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switch (application_state.mode) {
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case MODE_LOG:
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log_mode_handle_primary_button();
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break;
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case MODE_PREFS:
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prefs_mode_handle_primary_button();
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break;
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case MODE_SET:
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set_time_mode_handle_primary_button();
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break;
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default:
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break;
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}
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}
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void cb_tick() {
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// TODO: use alarm interrupt to trigger data acquisition.
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struct calendar_date_time date_time;
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watch_get_date_time(&date_time);
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if (date_time.time.min == 0 && date_time.time.sec == 0) {
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log_data();
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}
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if (application_state.light_ticks > 0) {
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application_state.light_ticks--;
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}
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if (application_state.mode_ticks > 0) {
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application_state.mode_ticks--;
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}
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}
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77
Sensor Watch BME280 Project/app.h
Normal file
77
Sensor Watch BME280 Project/app.h
Normal file
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@ -0,0 +1,77 @@
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// Sensor Watch: Hiking Log Demo App
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// This app displays a clock and temperature data from a BME280 temperature and humidiity sensor.
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// It also logs up to 36 hours of temperature data for playback.
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// You can use this app on backcountry treks: take the watch off at night and place it outside your tent.
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// It will log overnight low temperatures for review in the morning and optional transfer to your notepad.
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#define MAX_DATA_POINTS 36
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typedef enum ApplicationMode {
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MODE_CLOCK = 0, // Displays month, day and current time.
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MODE_TEMP, // (TE) Displays temperature and an optional humidity reading (0-10 representing 0-100%)
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MODE_LOG, // (LO) Plays back temperature data (temperature in seconds slot)
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MODE_PREFS, // (PR) Allows setting options for the application
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MODE_SET, // (ST) Set time and date
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NUM_MODES // Last item in the enum, it's the number of cases.
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} ApplicationMode;
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typedef struct SensorReading {
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bool is_valid;
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uint8_t hour;
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int8_t temperature;
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} SensorReading;
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typedef struct ApplicationState {
|
||||
// Internal application state
|
||||
ApplicationMode mode; // Current mode
|
||||
bool mode_changed; // Lets us perform one-time setup for a given mode
|
||||
uint16_t mode_ticks; // Timeout for the mode (returns to clock after timeout expires)
|
||||
uint8_t light_ticks; // Timeout for the light
|
||||
bool led_on; // Indicates that the LED is on
|
||||
uint8_t page; // Tracks the current page in log, prefs or settings.
|
||||
bool is_fahrenheit; // User preference, C or F
|
||||
bool debounce_wait; // For debouncing button inputs
|
||||
|
||||
// Data logging
|
||||
SensorReading logged_data[MAX_DATA_POINTS];
|
||||
|
||||
// User preference
|
||||
bool show_humidity; // Indicates that the LED is on
|
||||
|
||||
// BME280 calibration values
|
||||
uint16_t dig_T1;
|
||||
int16_t dig_T2;
|
||||
int16_t dig_T3;
|
||||
uint8_t dig_H1;
|
||||
int16_t dig_H2;
|
||||
uint8_t dig_H3;
|
||||
int16_t dig_H4;
|
||||
int16_t dig_H5;
|
||||
int8_t dig_H6;
|
||||
} ApplicationState;
|
||||
|
||||
float read_temperature(int32_t *p_t_fine);
|
||||
float read_humidity(int32_t t_fine);
|
||||
|
||||
void log_data();
|
||||
|
||||
void do_clock_mode();
|
||||
|
||||
void do_temp_mode();
|
||||
void temp_mode_handle_primary_button();
|
||||
|
||||
void do_log_mode();
|
||||
void log_mode_handle_primary_button();
|
||||
|
||||
void do_prefs_mode();
|
||||
void prefs_mode_handle_primary_button();
|
||||
void prefs_mode_handle_secondary_button();
|
||||
|
||||
void do_set_time_mode();
|
||||
void set_time_mode_handle_primary_button();
|
||||
void set_time_mode_handle_secondary_button();
|
||||
|
||||
void cb_light_pressed();
|
||||
void cb_mode_pressed();
|
||||
void cb_alarm_pressed();
|
||||
void cb_tick();
|
||||
Loading…
Reference in a new issue