STM32 BM680, bsec_set_configuration

[JohFlo]

Hi,

How can I load the "generic_33v_3s_4d" configuation on a STM32 to bsec_set_configuration();

Johannes

[BSTRobin]

Hi JohFlo,

Could you give detailed description? For example the link of example code you used, your modification, etc.

[JohFlo]

I use the standard bsec_iot_Init() from bsec 1.4.8.

return_values_init bsec_iot_init(float sample_rate, float temperature_offset, bme680_com_fptr_t bus_write, 
                    bme680_com_fptr_t bus_read, sleep_fct sleep, state_load_fct state_load, config_load_fct config_load)
{
    return_values_init ret = {BME680_OK, BSEC_OK};
    bsec_library_return_t bsec_status = BSEC_OK;
    
    uint8_t bsec_state[BSEC_MAX_STATE_BLOB_SIZE] = {0};
    uint8_t bsec_config[BSEC_MAX_PROPERTY_BLOB_SIZE] = {0};
    uint8_t work_buffer[BSEC_MAX_WORKBUFFER_SIZE] = {0};
    int bsec_state_len, bsec_config_len;
    
    /* Fixed I2C configuration */
    bme680_g.dev_id = BME680_I2C_ADDR_PRIMARY;
    bme680_g.intf = BME680_I2C_INTF;
    /* User configurable I2C configuration */
    bme680_g.write = bus_write;
    bme680_g.read = bus_read;
    bme680_g.delay_ms = sleep;
    
    /* Initialize BME680 API */
    ret.bme680_status = bme680_init(&bme680_g);
    if (ret.bme680_status != BME680_OK)
    {
        return ret;
    }
    
    /* Initialize BSEC library */
    ret.bsec_status = bsec_init();
    if (ret.bsec_status != BSEC_OK)
    {
        return ret;
    }
    
    /* Load library config, if available */
    bsec_config_len = config_load(bsec_config, sizeof(bsec_config));
    if (bsec_config_len != 0)
    {       
        ret.bsec_status = bsec_set_configuration(bsec_config, bsec_config_len, work_buffer, sizeof(work_buffer));     
        if (ret.bsec_status != BSEC_OK)
        {
            return ret;
        }
    }
    
    /* Load previous library state, if available */
    bsec_state_len = state_load(bsec_state, sizeof(bsec_state));
    if (bsec_state_len != 0)
    {       
        ret.bsec_status = bsec_set_state(bsec_state, bsec_state_len, work_buffer, sizeof(work_buffer));     
        if (ret.bsec_status != BSEC_OK)
        {
            return ret;
        }
    }
    
    /* Set temperature offset */
    bme680_temperature_offset_g = temperature_offset;
    
    /* Call to the function which sets the library with subscription information */
    ret.bsec_status = bme680_bsec_update_subscription(sample_rate);
    if (ret.bsec_status != BSEC_OK)
    {
        return ret;
    }
    
    return ret;
}

How can I use the generic config files . The use like on ESP does not work.

[BSTRobin · Accepted solution]

Hi JohFlo,

Did you copy config file bsec_config_iaq from "BSEC_1.4.8.0_Generic_Release\config\generic_33v_3s_4d\bsec_serialized_configurations_iaq.c"?

uint32_t config_load(uint8_t *config_buffer, uint32_t n_buffer)
{
// ...
// Load a library config from non-volatile memory, if available.
//
// Return zero if loading was unsuccessful or no config was available,
// otherwise return length of loaded config string.
// ...
memcpy(config_buffer, bsec_config_iaq, sizeof(bsec_config_iaq));
return 0;
}

[JohFlo]

Thanks, that was the solution.