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drivers: veml7700: Add white channel

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Add the white light channel to the
veml7700 sensor to allow for correction
of light sources with strong infrared
content.

Signed-off-by: Jeff Welder <Jeff.Welder@ellenbytech.com>
This commit is contained in:
Jeff Welder 2024-01-17 15:01:17 -05:00 • committed by David Leach
commit 59a87038df
2 changed files with 38 additions and 1 deletions
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29
drivers/sensor/veml7700/veml7700.c
View file

@ -1,5 +1,6 @@
/*
* Copyright (c) 2023 Andreas Kilian
* Copyright (c) 2024 Jeff Welder (Ellenby Technologies, Inc.)
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -87,6 +88,7 @@ struct veml7700_data {
uint16_t thresh_low;
uint16_t als_counts;
uint32_t als_lux;
uint16_t white_counts;
uint32_t int_flags;
};
@ -293,6 +295,23 @@ static int veml7700_fetch_als(const struct device *dev)
return 0;
}
static int veml7700_fetch_white(const struct device *dev)
{
struct veml7700_data *data = dev->data;
uint16_t counts;
int ret;
ret = veml7700_read(dev, VEML7700_CMDCODE_WHITE, &counts);
if (ret < 0) {
return ret;
}
data->white_counts = counts;
LOG_DBG("Read White Light measurement: counts=%d", data->white_counts);
return 0;
}
static int veml7700_fetch_int_flags(const struct device *dev)
{
struct veml7700_data *data = dev->data;
@ -428,6 +447,8 @@ static int veml7700_sample_fetch(const struct device *dev,
} else {
return -ENOTSUP;
}
} else if ((enum sensor_channel_veml7700)chan == SENSOR_CHAN_VEML7700_WHITE_RAW_COUNTS) {
return veml7700_fetch_white(dev);
} else if (chan == SENSOR_CHAN_ALL) {
data = dev->data;
if (data->int_mode != VEML7700_INT_DISABLED) {
@ -436,7 +457,10 @@ static int veml7700_sample_fetch(const struct device *dev,
return ret;
}
}
ret = veml7700_fetch_white(dev);
if (ret < 0) {
return ret;
}
return veml7700_fetch_als(dev);
} else {
return -ENOTSUP;
@ -453,6 +477,8 @@ static int veml7700_channel_get(const struct device *dev,
val->val1 = data->als_lux;
} else if ((enum sensor_channel_veml7700)chan == SENSOR_CHAN_VEML7700_RAW_COUNTS) {
val->val1 = data->als_counts;
} else if ((enum sensor_channel_veml7700)chan == SENSOR_CHAN_VEML7700_WHITE_RAW_COUNTS) {
val->val1 = data->white_counts;
} else if ((enum sensor_channel_veml7700)chan == SENSOR_CHAN_VEML7700_INTERRUPT) {
val->val1 = data->int_flags;
} else {
@ -514,6 +540,7 @@ static int veml7700_init(const struct device *dev)
data->int_mode = VEML7700_INT_DISABLED;
data->als_counts = 0;
data->als_lux = 0;
data->white_counts = 0;
data->shut_down = (conf->psm != VEML7700_PSM_DISABLED) ? 0 : 1;
/* Initialize sensor configuration */

10
include/zephyr/drivers/sensor/veml7700.h
View file

@ -1,5 +1,6 @@
/*
* Copyright (c) 2023 Andreas Kilian
* Copyright (c) 2024 Jeff Welder (Ellenby Technologies, Inc.)
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -134,6 +135,15 @@ enum sensor_channel_veml7700 {
*/
SENSOR_CHAN_VEML7700_RAW_COUNTS = SENSOR_CHAN_PRIV_START,
/**
* @brief Channel for white light sensor values.
*
* This channel is the White Channel count output of the sensor.
* The white channel can be used to correct for light sources with
* strong infrared content in the 750-800nm spectrum.
*/
SENSOR_CHAN_VEML7700_WHITE_RAW_COUNTS,
/**
* @brief This channel is used to query the ALS interrupt state (ALS_INT).
*