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drivers: sensor: ccs811: support update of environmental conditions

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Accurate estimate of gas presence requires temperature and humidity
data.  Add API to update these values.

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
This commit is contained in:
Peter A. Bigot 2018-11-23 03:58:51 -06:00 • committed by Maureen Helm
commit c90a738d8c
3 changed files with 89 additions and 0 deletions
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19
include/drivers/sensor/ccs811.h
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@ -20,6 +20,7 @@ extern "C" {
#endif
#include <device.h>
#include <drivers/sensor.h>
/**
* @brief Fetch the current value of the BASELINE register.
@ -51,6 +52,24 @@ int ccs811_baseline_fetch(struct device *dev);
*/
int ccs811_baseline_update(struct device *dev, u16_t baseline);
/**
* @brief Update the ENV_DATA register.
*
* Accurate calculation of gas levels requires accurate environment
* data. Measurements are only accurate to 0.5 Cel and 0.5 %RH.
*
* @param dev Pointer to the sensor device
*
* @param temperature the current temperature at the sensor
*
* @param humidity the current humidity at the sensor
*
* @return 0 if successful, negative errno code if failure.
*/
int ccs811_envdata_update(struct device *dev,
const struct sensor_value *temperature,
const struct sensor_value *humidity);
#ifdef __cplusplus
}
#endif