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- #include "bme280.h"
- #include "bme280_defs.h"
- #include "driver/i2c.h"
- #include <u8g2.h>
- #include "u8g2_esp32_hal.h"
- #include <esp_log.h>
-
- void i2c_setup()
- {
- printf("Setting up I²C driver... ");
- //i2c_driver_install(0, I2C_MODE_MASTER, 0, 0, 0);
- i2c_config_t config;
- config.mode = I2C_MODE_MASTER;
- config.sda_io_num = 18;
- config.sda_pullup_en = GPIO_PULLUP_ENABLE;
- config.scl_io_num = 19;
- config.scl_pullup_en = GPIO_PULLUP_ENABLE;
- config.master.clk_speed = 100000;
- i2c_param_config(I2C_NUM_0, &config);
- printf("Set driver parameters... ");
- esp_err_t err = i2c_driver_install(I2C_NUM_0, I2C_MODE_MASTER, 0, 0, 0);
- if (err == ESP_OK)
- printf("Driver installed!\n");
- else if (err == ESP_ERR_INVALID_ARG)
- printf("Driver install failed, invalid arguments!\n");
- else
- printf("Driver install failed!\n");
- }
-
- void i2c_detect()
- {
- printf("Scanning I²C bus:\n");
- uint8_t address;
- printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\r\n");
- for (int i = 0; i < 128; i += 16) {
- printf("%02x: ", i);
- for (int j = 0; j < 16; j++) {
- fflush(stdout);
- address = i + j;
- i2c_cmd_handle_t cmd = i2c_cmd_link_create();
- i2c_master_start(cmd);
- i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_WRITE, 0x1);
- i2c_master_stop(cmd);
- esp_err_t ret = i2c_master_cmd_begin(I2C_NUM_0, cmd, 50 / portTICK_RATE_MS);
- i2c_cmd_link_delete(cmd);
- if (ret == ESP_OK) {
- printf("%02x ", address);
- } else if (ret == ESP_ERR_TIMEOUT) {
- printf("UU ");
- } else {
- printf("-- ");
- }
- }
- printf("\r\n");
- }
- }
-
- int8_t i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len) {
- i2c_cmd_handle_t cmd = i2c_cmd_link_create();
- i2c_master_start(cmd);
- i2c_master_write_byte(cmd, dev_id << 1 | I2C_MASTER_WRITE, 1);
- i2c_master_write_byte(cmd, reg_addr, 1);
- i2c_master_start(cmd);
- i2c_master_write_byte(cmd, dev_id << 1 | I2C_MASTER_READ, 1);
- if (len > 1) {
- i2c_master_read(cmd, data, len - 1, I2C_MASTER_ACK);
- }
- i2c_master_read_byte(cmd, data + len - 1, I2C_MASTER_NACK);
- i2c_master_stop(cmd);
- i2c_master_cmd_begin(I2C_NUM_0, cmd, 500 / portTICK_RATE_MS);
- i2c_cmd_link_delete(cmd);
- return 0;
- }
-
- int8_t i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len) {
- //printf("Writing to bus: dev_id=%x, reg_addr=%x, data=%p, length=%u\n", dev_id, reg_addr, data, len);
- i2c_cmd_handle_t cmd = i2c_cmd_link_create();
- i2c_master_start(cmd);
- i2c_master_write_byte(cmd, (dev_id << 1) | I2C_MASTER_WRITE, 1);
- i2c_master_write_byte(cmd, reg_addr, 1);
- i2c_master_write(cmd, data, len, 1);
- i2c_master_stop(cmd);
- i2c_master_cmd_begin(I2C_NUM_0, cmd, 500 / portTICK_RATE_MS);
- i2c_cmd_link_delete(cmd);
- return 0;
- }
-
- void i2c_delay(uint32_t period) {
- vTaskDelay(period / portTICK_PERIOD_MS);
- }
-
- void i2c_shutdown()
- {
- printf("Shutting down I²C bus... ");
- esp_err_t err = i2c_driver_delete(I2C_NUM_0);
- if (err == ESP_ERR_INVALID_ARG)
- printf("Failed, invalid arguments!\n");
- else
- printf("Success!\n");
- }
-
- void read_sensor(struct bme280_dev* dev, int32_t* temp, uint32_t* pressure, uint32_t* humidity) {
-
- uint8_t settings_sel;
- uint32_t req_delay;
- struct bme280_data comp_data;
-
- /* Recommended mode of operation: Indoor navigation */
- dev->settings.osr_h = BME280_OVERSAMPLING_1X;
- dev->settings.osr_p = BME280_OVERSAMPLING_16X;
- dev->settings.osr_t = BME280_OVERSAMPLING_16X;
- dev->settings.filter = BME280_FILTER_COEFF_16;
-
- settings_sel = BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL | BME280_OSR_HUM_SEL | BME280_FILTER_SEL;
- bme280_set_sensor_settings(settings_sel, dev);
- /*Calculate the minimum delay required between consecutive measurement based upon the sensor enabled
- * and the oversampling configuration. */
- req_delay = 12*bme280_cal_meas_delay(&(dev->settings));
- printf("req_delay=%i\r\n", req_delay);
-
- /* Continuously stream sensor data */
- bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
- /* Wait for the measurement to complete and print data @25Hz */
- dev->delay_ms(req_delay / portTICK_PERIOD_MS);
- bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
- *temp = comp_data.temperature;
- *pressure = comp_data.pressure;
- *humidity = comp_data.humidity;
- }
-
- void print_data(u8g2_t* u8g2, int32_t temp, uint32_t pressure, uint32_t humidity) {
- int32_t temp1 = temp / 100;
- int32_t temp2 = (abs(temp) % 100) / 10;
- uint32_t press1 = pressure / 100;
- uint32_t humid1 = humidity / 1024;
- uint32_t humid2 = (humidity - humid1*1024) * 10 / 1024;
- //temp1 = 12;
- //temp2 = 3;
- int32_t temp3 = -1*temp1;
- int32_t temp4 = temp2;
- //press1 = 9999;
- //humid1 = 13;
- //humid2 = 4;
- char temp1str[31];
- char temp1str2[32];
- sprintf(temp1str, "%d,%d", temp1, temp2);
- if (temp1 < 10) {
- sprintf(temp1str2, " %s", temp1str);
- } else {
- sprintf(temp1str2, "%s", temp1str);
- }
- char temp2str[31];
- char temp2str2[33];
- sprintf(temp2str, "%d,%d", temp3, temp4);
- uint8_t spaces = 0;
- if (temp3 > 0)
- spaces++;
- if (abs(temp3) < 10)
- spaces++;
- if (spaces == 2)
- sprintf(temp2str2, " %s", temp2str);
- else if (spaces == 1)
- sprintf(temp2str2, " %s", temp2str);
- else {
- sprintf(temp2str2, "%s", temp2str);
- }
- char tempstr[70];
- sprintf(tempstr, "%s %s °C", temp1str2, temp2str2);
- u8g2_ClearBuffer(u8g2);
-
- char pressstr[27];
- char humidstr[27];
-
- sprintf(pressstr, "%d %d hPa", press1, press1);
- sprintf(humidstr, "%d,%d %d,%d %%", humid1, humid2, humid1, humid2);
-
- u8g2_SetFont(u8g2, u8g2_font_profont17_mf);
- int8_t fontheight = u8g2_GetAscent(u8g2);
- int8_t fontmargin = abs(u8g2_GetDescent(u8g2))+2;
- u8g2_DrawStr(u8g2, 0, fontheight, " IN OUT ");
- u8g2_DrawStr(u8g2, 0, 2*fontheight + fontmargin, tempstr);
- u8g2_DrawStr(u8g2, 0, 3*fontheight + 2*fontmargin, humidstr);
- u8g2_DrawStr(u8g2, 0, 4*fontheight + 3*fontmargin, pressstr);
- u8g2_SendBuffer(u8g2);
- }
-
- void app_main(void)
- {
- int32_t temp = 0;
- uint32_t pressure = 0;
- uint32_t humidity = 0;
-
- // INIT SENSOR
- i2c_setup();
- struct bme280_dev dev;
- dev.dev_id = 0x76;
- dev.intf = BME280_I2C_INTF;
- dev.read = i2c_read;
- dev.write = i2c_write;
- dev.delay_ms = i2c_delay;
- bme280_init(&dev);
-
- // INIT DISPLAY
- u8g2_esp32_hal_t u8g2_esp32_hal = U8G2_ESP32_HAL_DEFAULT;
- u8g2_esp32_hal.sda = 18;
- u8g2_esp32_hal.scl = 19;
-
- u8g2_esp32_hal_init(u8g2_esp32_hal);
- u8g2_t u8g2;
- u8g2_Setup_ssd1306_i2c_128x64_vcomh0_f(&u8g2, U8G2_R0, u8g2_esp32_i2c_byte_cb,
- u8g2_esp32_gpio_and_delay_cb);
- u8x8_SetI2CAddress(&u8g2.u8x8,0x3C << 1);
- u8g2_InitDisplay(&u8g2); // send init sequence to the display, display is in sleep mode after this,
- u8g2_SetPowerSave(&u8g2, 0); // wake up display
-
- while (1) {
- read_sensor(&dev, &temp, &pressure, &humidity);
- printf("%i °c, %i hPa, %i %%\r\n", temp, pressure, humidity);
- print_data(&u8g2, temp, pressure, humidity);
- vTaskDelay(250 / portTICK_PERIOD_MS);
- }
- }
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