driver_bme680_gas.c

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#include "driver_bme680_gas.h"
 
static bme680_handle_t gs_handle;        

uint8_t bme680_gas_init(bme680_interface_t interface, bme680_address_t addr_pin)
{
    uint8_t res;
    
    /* link interface function */
    DRIVER_BME680_LINK_INIT(&gs_handle, bme680_handle_t); 
    DRIVER_BME680_LINK_IIC_INIT(&gs_handle, bme680_interface_iic_init);
    DRIVER_BME680_LINK_IIC_DEINIT(&gs_handle, bme680_interface_iic_deinit);
    DRIVER_BME680_LINK_IIC_READ(&gs_handle, bme680_interface_iic_read);
    DRIVER_BME680_LINK_IIC_WRITE(&gs_handle, bme680_interface_iic_write);
    DRIVER_BME680_LINK_SPI_INIT(&gs_handle, bme680_interface_spi_init);
    DRIVER_BME680_LINK_SPI_DEINIT(&gs_handle, bme680_interface_spi_deinit);
    DRIVER_BME680_LINK_SPI_READ(&gs_handle, bme680_interface_spi_read);
    DRIVER_BME680_LINK_SPI_WRITE(&gs_handle, bme680_interface_spi_write);
    DRIVER_BME680_LINK_DELAY_MS(&gs_handle, bme680_interface_delay_ms);
    DRIVER_BME680_LINK_DEBUG_PRINT(&gs_handle, bme680_interface_debug_print);
    
    /* set interface */
    res = bme680_set_interface(&gs_handle, interface);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set interface failed.\n");
       
        return 1;
    }
    
    /* set addr pin */
    res = bme680_set_addr_pin(&gs_handle, addr_pin);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set addr pin failed.\n");
       
        return 1;
    }
    
    /* bme680 init */
    res = bme680_init(&gs_handle);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: init failed.\n");
        
        return 1;
    }
    
    /* set default temperature oversampling */
    res = bme680_set_temperature_oversampling(&gs_handle, BME680_GAS_DEFAULT_TEMPERATURE_OVERSAMPLING);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set temperature oversampling failed.\n");
        (void)bme680_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default pressure oversampling */
    res = bme680_set_pressure_oversampling(&gs_handle, BME680_GAS_DEFAULT_PRESSURE_OVERSAMPLING);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set pressure oversampling failed.\n");
        (void)bme680_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default humidity oversampling */
    res = bme680_set_humidity_oversampling(&gs_handle, BME680_GAS_DEFAULT_HUMIDITY_OVERSAMPLING);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set humidity oversampling failed.\n");
        (void)bme680_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default filter */
    res = bme680_set_filter(&gs_handle, BME680_GAS_DEFAULT_FILTER);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set filter failed.\n");
        (void)bme680_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default spi wire */
    res = bme680_set_spi_wire(&gs_handle, BME680_GAS_DEFAULT_SPI_WIRE);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set spi wire failed.\n");
        (void)bme680_deinit(&gs_handle);
        
        return 1;
    }
    
    /* disable heat off */
    res = bme680_set_heat_off(&gs_handle, BME680_BOOL_FALSE);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set heat off failed.\n");
        (void)bme680_deinit(&gs_handle); 
        
        return 1;
    }
    
    /* enable run gas */
    res = bme680_set_run_gas(&gs_handle, BME680_BOOL_TRUE);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set run gas failed.\n");
        (void)bme680_deinit(&gs_handle); 
        
        return 1;
    }
    
    /* set sleep mode */
    res = bme680_set_mode(&gs_handle, BME680_MODE_SLEEP);
    if (res != 0)
    {
        bme680_interface_debug_print("bme680: set mode failed.\n");
        (void)bme680_deinit(&gs_handle); 
        
        return 1;
    }
    
    return 0;
}

uint8_t bme680_gas_read(float idac_ma, float degree_celsius, uint16_t gas_wait_ms, uint8_t index,
                        float *temperature, float *pressure, float *humidity_percentage, float *ohms)
{
    uint8_t res;
    uint8_t reg;
    uint32_t temperature_yaw;
    uint32_t pressure_yaw;
    uint32_t humidity_raw;
    uint16_t adc_raw;
    uint8_t adc_range;
    uint8_t index_check;
    
    /* set idac ma */
    res = bme680_idac_heat_convert_to_register(&gs_handle, idac_ma, &reg);
    if (res != 0)
    {
        return 1;
    }
    
    /* set idac heat */
    res = bme680_set_idac_heat(&gs_handle, index, reg);
    if (res != 0)
    {
        return 1;
    }
    
    /* set degree celsius */
    res = bme680_resistance_heat_convert_to_register(&gs_handle, degree_celsius, &reg);
    if (res != 0)
    {
        return 1;
    }
    
    /* set resistance heat */
    res = bme680_set_resistance_heat(&gs_handle, index, reg);
    if (res != 0)
    {
        return 1;
    }
    
    /* set gas wait */
    res = bme680_gas_wait_convert_to_register(&gs_handle, gas_wait_ms, &reg);
    if (res != 0)
    {
        return 1;
    }
    
    /* set gas wait */
    res = bme680_set_gas_wait(&gs_handle, index, reg);
    if (res != 0)
    {
        return 1;
    }
    
    /* set convert index */
    res = bme680_set_convert_index(&gs_handle, index);
    if (res != 0)
    {
        return 1;
    }
    
    /* read */
    if (bme680_read(&gs_handle, (uint32_t *)&temperature_yaw, 
                    temperature, (uint32_t *)&pressure_yaw, pressure,
                   (uint32_t *)&humidity_raw, humidity_percentage,
                    &adc_raw, &adc_range, ohms, &index_check) != 0)
    {
        return 1;
    }
    
    /* check index */
    if (index_check != index)
    {
        return 1;
    }
    
    return 0;
}

uint8_t bme680_gas_deinit(void)
{
    /* close bme680 */
    if (bme680_deinit(&gs_handle) != 0)
    {
        return 1;
    }
    
    return 0;
}