new project: sensor watch environment
This commit is contained in:
Joey Castillo
parent
021a901bc1
commit
67e9d173ca
184
Sensor Watch BME280 Project/app.c
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184
Sensor Watch BME280 Project/app.c
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#include <stdio.h>
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#include <string.h>
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#include "watch.h"
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#include "app.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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bool light_on;
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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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ApplicationState application_state;
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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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/**
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* @brief Zeroes out the application state struct.
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*/
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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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}
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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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watch_enable_buttons();
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watch_register_button_callback(BTN_MODE, cb_mode_pressed);
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// pin A0 powers the sensor on this board.
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watch_enable_digital_output(A0);
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watch_set_pin_level(A0, true);
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delay_ms(10);
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watch_enable_i2c();
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watch_i2c_write8(BME280_ADDRESS, BME280_REGISTER_SOFTRESET, BME280_SOFT_RESET_CODE);
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delay_ms(10);
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application_state.dig_T1 = watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_DIG_T1);
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application_state.dig_T2 = (int16_t)watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_DIG_T2);
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application_state.dig_T3 = (int16_t)watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_DIG_T3);
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application_state.dig_H1 = watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H1);
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application_state.dig_H2 = (int16_t)watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_DIG_H2);
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application_state.dig_H3 = watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H3);
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application_state.dig_H4 = ((int8_t)watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H4) << 4) |
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(watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H4 + 1) & 0xF);
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application_state.dig_H5 = ((int8_t)watch_i2c_read8(BME280_ADDRESS, BME280_REGISTER_DIG_H5 + 1) << 4) |
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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, BME280_CONTROL_TEMPERATURE_SAMPLING_X16 |
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BME280_CONTROL_PRESSURE_SAMPLING_NONE |
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BME280_CONTROL_MODE_NORMAL);
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watch_enable_display();
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watch_register_tick_callback(cb_tick);
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}
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/**
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* Nothing to do here.
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*/
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void app_prepare_for_sleep() {
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}
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/**
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* @todo restore the BME280's calibration values from backup memory
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*/
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void app_wake_from_sleep() {
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}
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/**
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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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switch (application_state.mode) {
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case MODE_TEMPERATURE:
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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_pixel(1, 16);
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break;
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case MODE_HUMIDITY:
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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_pixel(1, 16);
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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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return true;
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}
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/**
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* Reads the temperature from the BME280
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* @param p_t_fine - an optional pointer to an int32_t; if provided, the t_fine measurement
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* (required for humidity calculation) will be returned by reference.
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* Pass in NULL if you do not care about this value.
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* @return a float indicating the temperature in degrees celsius.
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*/
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float read_temperature(int32_t *p_t_fine) {
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// read24 reads the bytes into a uint32 which works for little-endian values (MSB is 0)
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uint32_t raw_data = watch_i2c_read24(BME280_ADDRESS, BME280_REGISTER_TEMP_DATA) >> 8;
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// alas the sensor's register layout is big-endian-ish, with a nibble of zeroes at the end of the LSB.
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// this line shuffles everything back into place (swaps LSB and MSB and shifts the zeroes off the end)
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int32_t adc_value = (((raw_data >> 16) | (raw_data & 0xFF00) | (raw_data << 16)) & 0xFFFFFF) >> 4;
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// this bit is cribbed from Adafruit's BME280 driver. support their open source efforts by buying some stuff!
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int32_t var1 = ((((adc_value >> 3) - ((int32_t)application_state.dig_T1 << 1))) * ((int32_t)application_state.dig_T2)) >> 11;
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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;
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int32_t t_fine = var1 + var2;
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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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}
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/**
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* Reads the humidity from the BME280
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* @param t_fine - the t_fine measurement from a call to read_temperature
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* @return a float indicating the temperature in degrees celsius.
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*/
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float read_humidity(int32_t t_fine) {
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int32_t adc_value = watch_i2c_read16(BME280_ADDRESS, BME280_REGISTER_HUMID_DATA);
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// the sensor returns this as big-endian, so swap the bytes.
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adc_value = (adc_value >> 8) | (adc_value << 8);
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// again, cribbed from Adafruit's BME280 driver. they sell a great breakout board for this sensor!
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int32_t v_x1_u32r = v_x1_u32r = (t_fine - ((int32_t)76800));
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v_x1_u32r = (((((adc_value << 14) - (((int32_t)application_state.dig_H4) << 20) - (((int32_t)application_state.dig_H5) * v_x1_u32r)) +
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((int32_t)16384)) >> 15) * (((((((v_x1_u32r * ((int32_t)application_state.dig_H6)) >> 10) * (((v_x1_u32r * ((int32_t)application_state.dig_H3)) >> 11) +
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((int32_t)32768))) >> 10) + ((int32_t)2097152)) * ((int32_t)application_state.dig_H2) + 8192) >> 14));
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v_x1_u32r = (v_x1_u32r - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7) * ((int32_t)application_state.dig_H1)) >> 4));
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v_x1_u32r = (v_x1_u32r < 0) ? 0 : v_x1_u32r;
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v_x1_u32r = (v_x1_u32r > 419430400) ? 419430400 : v_x1_u32r;
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float h = (v_x1_u32r >> 12);
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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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}
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void cb_tick() {
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}
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85
Sensor Watch BME280 Project/bme280.h
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85
Sensor Watch BME280 Project/bme280.h
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#define BME280_ADDRESS (0x77)
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#define BME280_SOFT_RESET_CODE (0xB6)
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#define BME280_STATUS_UPDATING_MASK (1 << 3)
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typedef enum BME280Register {
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BME280_REGISTER_DIG_T1 = 0x88,
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BME280_REGISTER_DIG_T2 = 0x8A,
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BME280_REGISTER_DIG_T3 = 0x8C,
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BME280_REGISTER_DIG_P1 = 0x8E,
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BME280_REGISTER_DIG_P2 = 0x90,
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BME280_REGISTER_DIG_P3 = 0x92,
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BME280_REGISTER_DIG_P4 = 0x94,
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BME280_REGISTER_DIG_P5 = 0x96,
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BME280_REGISTER_DIG_P6 = 0x98,
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BME280_REGISTER_DIG_P7 = 0x9A,
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BME280_REGISTER_DIG_P8 = 0x9C,
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BME280_REGISTER_DIG_P9 = 0x9E,
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BME280_REGISTER_DIG_H1 = 0xA1,
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BME280_REGISTER_DIG_H2 = 0xE1,
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BME280_REGISTER_DIG_H3 = 0xE3,
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BME280_REGISTER_DIG_H4 = 0xE4,
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BME280_REGISTER_DIG_H5 = 0xE5,
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BME280_REGISTER_DIG_H6 = 0xE7,
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BME280_REGISTER_CHIPID = 0xD0,
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BME280_REGISTER_VERSION = 0xD1,
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BME280_REGISTER_SOFTRESET = 0xE0,
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BME280_REGISTER_CAL26 = 0xE1,
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BME280_REGISTER_CONTROL_HUMID = 0xF2,
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BME280_REGISTER_STATUS = 0XF3,
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BME280_REGISTER_CONTROL = 0xF4,
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BME280_REGISTER_CONFIG = 0xF5,
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BME280_REGISTER_PRESSURE_DATA = 0xF7,
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BME280_REGISTER_TEMP_DATA = 0xFA,
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BME280_REGISTER_HUMID_DATA = 0xFD
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} BME280Register;
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typedef enum BME280Control {
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BME280_CONTROL_MODE_SLEEP = 0b00,
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BME280_CONTROL_MODE_FORCED = 0b01,
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BME280_CONTROL_MODE_NORMAL = 0b11,
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BME280_CONTROL_PRESSURE_SAMPLING_NONE = 0b000 << 2,
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BME280_CONTROL_PRESSURE_SAMPLING_X1 = 0b001 << 2,
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BME280_CONTROL_PRESSURE_SAMPLING_X2 = 0b010 << 2,
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BME280_CONTROL_PRESSURE_SAMPLING_X4 = 0b011 << 2,
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BME280_CONTROL_PRESSURE_SAMPLING_X8 = 0b100 << 2,
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BME280_CONTROL_PRESSURE_SAMPLING_X16 = 0b101 << 2,
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BME280_CONTROL_TEMPERATURE_SAMPLING_NONE = 0b000 << 5,
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BME280_CONTROL_TEMPERATURE_SAMPLING_X1 = 0b001 << 5,
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BME280_CONTROL_TEMPERATURE_SAMPLING_X2 = 0b010 << 5,
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BME280_CONTROL_TEMPERATURE_SAMPLING_X4 = 0b011 << 5,
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BME280_CONTROL_TEMPERATURE_SAMPLING_X8 = 0b100 << 5,
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BME280_CONTROL_TEMPERATURE_SAMPLING_X16 = 0b101 << 5
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} BME280Control;
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typedef enum BME280ControlHumidity {
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BME280_CONTROL_HUMID_SAMPLING_NONE = 0b000,
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BME280_CONTROL_HUMID_SAMPLING_X1 = 0b001,
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BME280_CONTROL_HUMID_SAMPLING_X2 = 0b010,
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BME280_CONTROL_HUMID_SAMPLING_X4 = 0b011,
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BME280_CONTROL_HUMID_SAMPLING_X8 = 0b100,
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BME280_CONTROL_HUMID_SAMPLING_X16 = 0b101
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} BME280ControlHumidity;
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typedef enum BME280Filter {
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BME280_CONFIG_FILTER_OFF = 0b000 << 2,
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BME280_CONFIG_FILTER_X2 = 0b001 << 2,
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BME280_CONFIG_FILTER_X4 = 0b010 << 2,
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BME280_CONFIG_FILTER_X8 = 0b011 << 2,
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BME280_CONFIG_FILTER_X16 = 0b10 << 2,
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BME280_CONFIG_STANDBY_MS_0_5 = 0b000 << 5,
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BME280_CONFIG_STANDBY_MS_10 = 0b110 << 5,
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BME280_CONFIG_STANDBY_MS_20 = 0b111 << 5,
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BME280_CONFIG_STANDBY_MS_62_5 = 0b001 << 5,
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BME280_CONFIG_STANDBY_MS_125 = 0b010 << 5,
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BME280_CONFIG_STANDBY_MS_250 = 0b011 << 5,
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BME280_CONFIG_STANDBY_MS_500 = 0b100 << 5,
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BME280_CONFIG_STANDBY_MS_1000 = 0b101 << 5
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} BME280Filter;
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inline uint16_t make_le_16(uint16_t val) { return (val >> 8) | (val << 8); }
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1
Sensor Watch BME280 Project/make/.gitignore
vendored
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1
Sensor Watch BME280 Project/make/.gitignore
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build/
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151
Sensor Watch BME280 Project/make/Makefile
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151
Sensor Watch BME280 Project/make/Makefile
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##############################################################################
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BUILD = build
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BIN = watch
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##############################################################################
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.PHONY: all directory clean size
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CC = arm-none-eabi-gcc
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OBJCOPY = arm-none-eabi-objcopy
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SIZE = arm-none-eabi-size
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UF2 = python ../../utils/uf2conv.py
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ifeq ($(OS), Windows_NT)
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MKDIR = gmkdir
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else
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MKDIR = mkdir
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endif
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CFLAGS += -W -Wall --std=gnu99 -Os
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CFLAGS += -fno-diagnostics-show-caret
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CFLAGS += -fdata-sections -ffunction-sections
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CFLAGS += -funsigned-char -funsigned-bitfields
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CFLAGS += -mcpu=cortex-m0plus -mthumb
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CFLAGS += -MD -MP -MT $(BUILD)/$(*F).o -MF $(BUILD)/$(@F).d
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LDFLAGS += -mcpu=cortex-m0plus -mthumb
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LDFLAGS += -Wl,--gc-sections
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LDFLAGS += -Wl,--script=../../watch-library/linker/saml22j18.ld
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# If you add any additional directories with headers, add them to this list, e.g.
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# ../drivers/
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INCLUDES += \
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-I../ \
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-I../../watch-library/include \
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-I../../watch-library/hal/ \
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-I../../watch-library/hal/documentation/ \
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-I../../watch-library/hal/include/ \
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-I../../watch-library/hal/src/ \
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-I../../watch-library/hal/utils/ \
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-I../../watch-library/hal/utils/include/ \
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-I../../watch-library/hal/utils/src/ \
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-I../../watch-library/hpl/ \
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-I../../watch-library/hpl/adc/ \
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-I../../watch-library/hpl/core/ \
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-I../../watch-library/hpl/dmac/ \
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-I../../watch-library/hpl/eic/ \
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-I../../watch-library/hpl/gclk/ \
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-I../../watch-library/hpl/mclk/ \
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-I../../watch-library/hpl/osc32kctrl/ \
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-I../../watch-library/hpl/oscctrl/ \
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-I../../watch-library/hpl/pm/ \
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-I../../watch-library/hpl/port/ \
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-I../../watch-library/hpl/rtc/ \
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-I../../watch-library/hpl/sercom/ \
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-I../../watch-library/hpl/slcd/ \
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-I../../watch-library/hpl/systick/ \
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-I../../watch-library/hpl/tcc/ \
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-I../../watch-library/hpl/tc/ \
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-I../../watch-library/hri/ \
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-I../../watch-library/config/ \
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-I../../watch-library/hw/ \
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-I../../watch-library/watch/ \
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-I../../watch-library
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# If you add any additional C files to your project, add them each to this list, e.g.
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# ../drivers/st25dv.c
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SRCS += \
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../app.c \
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../../watch-library/main.c \
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../../watch-library/startup_saml22.c \
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../../watch-library/hw/driver_init.c \
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../../watch-library/watch/watch.c \
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../../watch-library/hal/src/hal_adc_sync.c \
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../../watch-library/hal/src/hal_atomic.c \
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../../watch-library/hal/src/hal_calendar.c \
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../../watch-library/hal/src/hal_delay.c \
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../../watch-library/hal/src/hal_ext_irq.c \
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../../watch-library/hal/src/hal_gpio.c \
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../../watch-library/hal/src/hal_i2c_m_sync.c \
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../../watch-library/hal/src/hal_init.c \
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../../watch-library/hal/src/hal_io.c \
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../../watch-library/hal/src/hal_pwm.c \
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../../watch-library/hal/src/hal_slcd_sync.c \
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../../watch-library/hal/src/hal_sleep.c \
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../../watch-library/hal/utils/src/utils_assert.c \
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../../watch-library/hal/utils/src/utils_event.c \
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../../watch-library/hal/utils/src/utils_list.c \
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../../watch-library/hal/utils/src/utils_syscalls.c \
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../../watch-library/hpl/adc/hpl_adc.c \
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../../watch-library/hpl/core/hpl_core_m0plus_base.c \
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../../watch-library/hpl/core/hpl_init.c \
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../../watch-library/hpl/dmac/hpl_dmac.c \
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../../watch-library/hpl/eic/hpl_eic.c \
|
||||
../../watch-library/hpl/gclk/hpl_gclk.c \
|
||||
../../watch-library/hpl/mclk/hpl_mclk.c \
|
||||
../../watch-library/hpl/osc32kctrl/hpl_osc32kctrl.c \
|
||||
../../watch-library/hpl/oscctrl/hpl_oscctrl.c \
|
||||
../../watch-library/hpl/pm/hpl_pm.c \
|
||||
../../watch-library/hpl/rtc/hpl_rtc.c \
|
||||
../../watch-library/hpl/sercom/hpl_sercom.c \
|
||||
../../watch-library/hpl/slcd/hpl_slcd.c \
|
||||
../../watch-library/hpl/systick/hpl_systick.c \
|
||||
../../watch-library/hpl/tcc/hpl_tcc.c \
|
||||
../../watch-library/hpl/tc/hpl_tc.c
|
||||
|
||||
DEFINES += \
|
||||
-D__SAML22J18A__ \
|
||||
-DDONT_USE_CMSIS_INIT
|
||||
|
||||
CFLAGS += $(INCLUDES) $(DEFINES)
|
||||
|
||||
OBJS = $(addprefix $(BUILD)/, $(notdir %/$(subst .c,.o, $(SRCS))))
|
||||
|
||||
all: directory $(BUILD)/$(BIN).elf $(BUILD)/$(BIN).hex $(BUILD)/$(BIN).bin $(BUILD)/$(BIN).uf2 size
|
||||
|
||||
$(BUILD)/$(BIN).elf: $(OBJS)
|
||||
@echo LD $@
|
||||
@$(CC) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
|
||||
|
||||
$(BUILD)/$(BIN).hex: $(BUILD)/$(BIN).elf
|
||||
@echo OBJCOPY $@
|
||||
@$(OBJCOPY) -O ihex $^ $@
|
||||
|
||||
$(BUILD)/$(BIN).bin: $(BUILD)/$(BIN).elf
|
||||
@echo OBJCOPY $@
|
||||
@$(OBJCOPY) -O binary $^ $@
|
||||
|
||||
$(BUILD)/$(BIN).uf2: $(BUILD)/$(BIN).bin
|
||||
@echo UF2CONV $@
|
||||
@$(UF2) $^ -co $@
|
||||
|
||||
install:
|
||||
@$(UF2) -D $(BUILD)/$(BIN).uf2
|
||||
|
||||
%.o:
|
||||
@echo CC $@
|
||||
@$(CC) $(CFLAGS) $(filter %/$(subst .o,.c,$(notdir $@)), $(SRCS)) -c -o $@
|
||||
|
||||
directory:
|
||||
@$(MKDIR) -p $(BUILD)
|
||||
|
||||
size: $(BUILD)/$(BIN).elf
|
||||
@echo size:
|
||||
@$(SIZE) -t $^
|
||||
|
||||
clean:
|
||||
@echo clean
|
||||
@-rm -rf $(BUILD)
|
||||
|
||||
-include $(wildcard $(BUILD)/*.d)
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user