127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
#ifdef HAS_BME
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#include "bme680mems.h"
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// Local logging tag
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static const char TAG[] = "main";
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bmeStatus_t bme_status;
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void bme_init(void) {
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// initialize BME680 sensor
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struct bme680_dev gas_sensor;
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Wire.begin(HAS_BME, 400000); // I2C connect to BME680 sensor with 400 KHz
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// configure sensor for I2C communication
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gas_sensor.dev_id = BME_ADDR;
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gas_sensor.intf = BME680_I2C_INTF;
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gas_sensor.read = user_i2c_read;
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gas_sensor.write = user_i2c_write;
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gas_sensor.delay_ms = user_delay_ms;
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gas_sensor.amb_temp = 25;
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int8_t rslt = BME680_OK;
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rslt = bme680_init(&gas_sensor);
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if (rslt == BME680_OK) {
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ESP_LOGI(TAG, "BME680 sensor found");
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} else {
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ESP_LOGE(TAG, "BME680 sensor not found on i2c bus");
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return;
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}
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// configure BME680 sensor in forced mode
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uint8_t set_required_settings;
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/* Set the temperature, pressure and humidity settings */
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gas_sensor.tph_sett.os_hum = BME680_OS_2X;
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gas_sensor.tph_sett.os_pres = BME680_OS_4X;
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gas_sensor.tph_sett.os_temp = BME680_OS_8X;
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gas_sensor.tph_sett.filter = BME680_FILTER_SIZE_3;
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/* Set the remaining gas sensor settings and link the heating profile */
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gas_sensor.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
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/* Create a ramp heat waveform in 3 steps */
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gas_sensor.gas_sett.heatr_temp = 320; /* degree Celsius */
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gas_sensor.gas_sett.heatr_dur = 150; /* milliseconds */
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/* Select the power mode */
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/* Must be set before writing the sensor configuration */
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gas_sensor.power_mode = BME680_FORCED_MODE;
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/* Set the required sensor settings needed */
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set_required_settings = BME680_OST_SEL | BME680_OSP_SEL | BME680_OSH_SEL |
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BME680_FILTER_SEL | BME680_GAS_SENSOR_SEL;
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/* Set the desired sensor configuration */
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rslt = bme680_set_sensor_settings(set_required_settings, &gas_sensor);
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/* Set the power mode */
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rslt = bme680_set_sensor_mode(&gas_sensor);
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if (rslt == BME680_OK) {
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ESP_LOGI(TAG, "BME680 sensor initialized");
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} else {
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ESP_LOGE(TAG, "BME680 initialization failed");
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return;
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}
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}
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bool bme_read(void) {
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/*
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bool ret = bme.performReading();
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if (ret) {
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// read current BME data and buffer in global struct
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bme_status.temperature = bme.temperature;
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bme_status.pressure = (uint16_t)(bme.pressure / 100.0); // convert Pa ->
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hPa bme_status.humidity = bme.humidity; bme_status.gas_resistance =
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(uint16_t)(bme.gas_resistance / 1000.0); // convert Ohm -> kOhm
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ESP_LOGI(TAG, "BME680 sensor data read success");
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} else {
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ESP_LOGI(TAG, "BME680 sensor read error");
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}
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return ret;
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*/
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}
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int8_t user_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data,
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uint16_t len) {
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int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */
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uint16_t i;
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Wire.beginTransmission(dev_id);
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Wire.write(reg_addr);
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rslt = Wire.endTransmission();
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Wire.requestFrom((int)dev_id, (int)len);
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for (i = 0; (i < len) && Wire.available(); i++) {
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reg_data[i] = Wire.read();
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}
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return rslt;
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}
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int8_t user_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data,
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uint16_t len) {
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int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */
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uint16_t i;
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Wire.beginTransmission(dev_id);
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Wire.write(reg_addr);
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for (i = 0; i < len; i++) {
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Wire.write(reg_data[i]);
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}
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rslt = Wire.endTransmission();
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return rslt;
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}
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void user_delay_ms(uint32_t period) { vTaskDelay(period / portTICK_PERIOD_MS); }
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#endif // HAS_BME
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