74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
#include "run_bme680.h"
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#include "../run.h"
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extern I2C_HandleTypeDef hi2c1;
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#define BME680_I2C_INSTANCE hi2c1
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static int8_t bme680_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len);
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static int8_t bme680_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len);
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void bme680_output_ready(
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float iaq, float temperature, float humidity,
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float pressure, float co2_equivalent, float breath_voc_equivalent
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);
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int8_t bme680_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len) {
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return HAL_I2C_Mem_Read(&BME680_I2C_INSTANCE, dev_id << 1, reg_addr, 1, data, len, 1000);
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}
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int8_t bme680_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len) {
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return HAL_I2C_Mem_Write(&BME680_I2C_INSTANCE, dev_id << 1, reg_addr, 1, data, len, 1000);
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}
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int bme680_my_init() {
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return_values_init ret;
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/* Call to the function which initializes the BSEC library
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* Switch on low-power mode and provide no temperature offset */
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ret = bsec_iot_init(BSEC_SAMPLE_RATE_ULP, 0.0f, bme680_i2c_write, bme680_i2c_read, HAL_Delay);
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if (ret.bme680_status) {
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/* Could not intialize BME680 */
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return (int)ret.bme680_status;
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} else if (ret.bsec_status) {
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/* Could not intialize BSEC library */
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return (int)ret.bsec_status;
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}
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return 0;
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}
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int64_t bme680_fake_timestamp = 0;
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void bme680_my_loop() {
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/* BSEC sensor settings struct */
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bsec_bme_settings_t sensor_settings;
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/* Retrieve sensor settings to be used in this time instant by calling bsec_sensor_control */
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bsec_sensor_control(bme680_fake_timestamp, &sensor_settings);
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if(bme680_fake_timestamp < sensor_settings.next_call) {
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bme680_fake_timestamp = sensor_settings.next_call;
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}
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/* Trigger a measurement if necessary */
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bme680_bsec_trigger_measurement(&sensor_settings, HAL_Delay);
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/* Read data from last measurement */
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bsec_input_t bsec_inputs[BSEC_MAX_PHYSICAL_SENSOR];
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uint8_t num_bsec_inputs = 0;
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bme680_bsec_read_data(bme680_fake_timestamp, bsec_inputs, &num_bsec_inputs, sensor_settings.process_data);
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/* Time to invoke BSEC to perform the actual processing */
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bme680_bsec_process_data(bsec_inputs, num_bsec_inputs, bme680_output_ready);
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}
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void bme680_output_ready(
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float iaq, float temperature, float humidity,
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float pressure, float co2_equivalent, float breath_voc_equivalent
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) {
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measure_value.bme680.air_quality = iaq;
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measure_value.bme680.humidity = humidity;
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measure_value.bme680.pressure = pressure;
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measure_value.bme680.temperature = temperature;
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measure_value.bme680.tvoc = breath_voc_equivalent;
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measure_value.bme680.co2 = co2_equivalent;
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}
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