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sensors: move grove sensors under drivers/sensor

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Grove devices are sensors, so no need to have them under their own
category.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit is contained in:
Anas Nashif 2018-10-19 08:43:50 -04:00
commit 203948e156
10 changed files with 15 additions and 19 deletions
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105
drivers/sensor/grove/light_sensor.c Normal file
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/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <adc.h>
#include <device.h>
#include <math.h>
#include <sensor.h>
#include <zephyr.h>
#define LOG_LEVEL CONFIG_SENSOR_LOG_LEVEL
#include <logging/log.h>
LOG_MODULE_REGISTER(grove_light);
struct gls_data {
struct device *adc;
struct adc_channel_cfg ch10_cfg;
u8_t adc_buffer[4];
};
static struct adc_sequence_options options = {
.interval_us = 12,
.extra_samplings = 0,
};
static struct adc_sequence adc_table = {
.options = &options,
};
#define ADC_RESOLUTION 12
static int gls_sample_fetch(struct device *dev, enum sensor_channel chan)
{
struct gls_data *drv_data = dev->driver_data;
return adc_read(drv_data->adc, &adc_table);
}
static int gls_channel_get(struct device *dev,
enum sensor_channel chan,
struct sensor_value *val)
{
struct gls_data *drv_data = dev->driver_data;
u16_t analog_val;
double ldr_val, dval;
/* rescale sample from 12bit (Zephyr) to 10bit (Grove) */
analog_val = ((u16_t)drv_data->adc_buffer[1] << 8) |
drv_data->adc_buffer[0];
analog_val = analog_val >> 2;
/*
* The formula for converting the analog value to lux is taken from
* the UPM project:
* https://github.com/intel-iot-devkit/upm/blob/master/src/grove/grove.cxx#L161
*/
ldr_val = (1023.0 - analog_val) * 10.0 / analog_val;
dval = 10000.0 / pow(ldr_val * 15.0, 4.0/3.0);
val->val1 = (s32_t)dval;
val->val2 = ((s32_t)(dval * 1000000)) % 1000000;
return 0;
}
static const struct sensor_driver_api gls_api = {
.sample_fetch = &gls_sample_fetch,
.channel_get = &gls_channel_get,
};
static int gls_init(struct device *dev)
{
struct gls_data *drv_data = dev->driver_data;
drv_data->adc =
device_get_binding(CONFIG_GROVE_LIGHT_SENSOR_ADC_DEV_NAME);
if (drv_data->adc == NULL) {
LOG_ERR("Failed to get ADC device.");
return -EINVAL;
}
/*Change following parameters according to board if necessary*/
drv_data->ch10_cfg.channel_id = CONFIG_GROVE_LIGHT_SENSOR_ADC_CHANNEL;
drv_data->ch10_cfg.differential = false;
drv_data->ch10_cfg.gain = ADC_GAIN_1,
drv_data->ch10_cfg.reference = ADC_REF_INTERNAL;
drv_data->ch10_cfg.acquisition_time = ADC_ACQ_TIME_DEFAULT;
adc_table.buffer = drv_data->adc_buffer;
adc_table.channels = BIT(CONFIG_GROVE_LIGHT_SENSOR_ADC_CHANNEL);
adc_table.resolution = ADC_RESOLUTION;
adc_table.buffer_size = 4;
adc_channel_setup(drv_data->adc, &drv_data->ch10_cfg);
dev->driver_api = &gls_api;
return 0;
}
static struct gls_data gls_data;
DEVICE_INIT(gls_dev, CONFIG_GROVE_LIGHT_SENSOR_NAME, &gls_init, &gls_data,
NULL, POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY);