#define DEVICE_AVAIL_FREQ_PATH BASE_PATH "sampling_frequency_available"
#define ILLUMINATION_CALIBPATH BASE_PATH "in_illuminance_calibscale"
-#define PROP_BASE "ro.iio.%s.%s" /* Note: PROPERTY_KEY_MAX is small */
+#define PROP_BASE "ro.iio.%s.%s" /* Note: PROPERTY_KEY_MAX is small */
-#define MAX_TYPE_SPEC_LEN 32 /* Channel type spec len; ex: "le:u10/16>>0" */
+#define MAX_TYPE_SPEC_LEN 32 /* Channel type spec len; ex: "le:u10/16>>0" */
#define MAX_SENSOR_REPORT_SIZE 32 /* Sensor report buffer size */
#define MAX_DEVICE_REPORT_SIZE 32 /* iio device scan buffer size */
#define MAX_NAME_SIZE 32
-#define MAX_SENSOR_BASES 3 /* Max number of base sensors a sensor can rely on */
+#define MAX_SENSOR_BASES 3 /* Max number of base sensors a sensor can rely on */
#define ARRAY_SIZE(x) sizeof(x)/sizeof(x[0])
#define REPORTING_MODE(x) ((x) & 0x06)
typedef struct
{
- const char *tag; /* Prefix such as "accel", "gyro", "temp"... */
- const int type; /* Sensor type ; ex: SENSOR_TYPE_ACCELEROMETER */
+ const char *tag; /* Prefix such as "accel", "gyro", "temp"... */
+ const int type; /* Sensor type ; ex: SENSOR_TYPE_ACCELEROMETER */
const int num_channels; /* Expected iio channels for this sensor */
- const int is_virtual; /* Is the sensor virtual or not */
+ const int is_virtual; /* Is the sensor virtual or not */
channel_descriptor_t channel[MAX_CHANNELS];
}
sensor_catalog_entry_t;
typedef struct
{
- int offset; /* Offset in bytes within the iio character device report */
- int size; /* Field size in bytes */
- float scale; /* scale for each channel */
- char type_spec[MAX_TYPE_SPEC_LEN]; /* From driver; ex: le:u10/16>>0 */
- datum_info_t type_info; /* Decoded contents of type spec */
- float opt_scale; /* Optional correction scale read from a property such
- * as iio.accel.x.scale, allowing late compensation of
- * problems such as misconfigured axes ; set to 1 by
- * default. Applied at the end of the scaling process.
+ int offset; /* Offset in bytes within the iio character device report */
+ int size; /* Field size in bytes */
+ float scale; /* scale for each channel */
+ char type_spec[MAX_TYPE_SPEC_LEN]; /* From driver; ex: le:u10/16>>0 */
+ datum_info_t type_info; /* Decoded contents of type spec */
+ float opt_scale; /*
+ * Optional correction scale read from a property such as iio.accel.x.scale, allowing late compensation of
+ * problems such as misconfigured axes ; set to 1 by default. Applied at the end of the scaling process.
*/
}
channel_info_t;
float power;
/*
- * Currently active trigger - either a pointer to the initial (default)
- * trigger name buffer, or a pointer to the motion trigger name buffer,
- * or something else (typically NULL or a pointer to some static "\n".
- * This is used to determine if the conditions are met to switch from
- * the default trigger to the motion trigger for a sensor, or rather for
- * the interrupt-driven sensors associated to a given iio device.
+ * Currently active trigger - either a pointer to the initial (default) trigger name buffer, or a pointer to the motion trigger name buffer,
+ * or something else (typically NULL or a pointer to some static "\n". This is used to determine if the conditions are met to switch from
+ * the default trigger to the motion trigger for a sensor, or rather for the interrupt-driven sensors associated to a given iio device.
*/
const char* selected_trigger;
- float offset; /* (cooked = raw + offset) * scale */
- float scale; /*default:1. when set to 0, use channel specific value*/
- float illumincalib; /* to set the calibration for the ALS */
+ float offset; /* (cooked = raw + offset) * scale */
+ float scale; /* default:1. when set to 0, use channel specific value */
+ float illumincalib; /* to set the calibration for the ALS */
- float requested_rate; /* requested events / second */
- float sampling_rate; /* setup events / second */
+ float requested_rate; /* requested events / second */
+ float sampling_rate; /* setup events / second */
- int dev_num; /* Associated iio dev num, ex: 3 for /dev/iio:device3 */
+ int dev_num; /* Associated iio dev num, ex: 3 for /dev/iio:device3 */
- int catalog_index;/* Associated entry within the sensor_catalog array */
- int type; /* Sensor type, such as SENSOR_TYPE_GYROSCOPE */
+ int catalog_index; /* Associated entry within the sensor_catalog array */
+ int type; /* Sensor type, such as SENSOR_TYPE_GYROSCOPE */
- int num_channels; /* Actual channel count ; 0 for poll mode sensors */
+ int num_channels; /* Actual channel count ; 0 for poll mode sensors */
/*
- * The array below indicates where to gather report data for this
- * sensor inside the reports that we read from the iio character device.
- * It is updated whenever channels are enabled or disabled on the same
- * device. Channel size indicates the size in bytes of fields, and
- * should be zero for disabled channels. The type field indicates how a
- * specific channel data item is structured.
+ * The array below indicates where to gather report data for this sensor inside the reports that we read from the iio character device.
+ * It is updated whenever channels are enabled or disabled on the same device. Channel size indicates the size in bytes of fields, and
+ * should be zero for disabled channels. The type field indicates how a specific channel data item is structured.
*/
channel_info_t channel[MAX_CHANNELS];
/*
- * This flag is set if we acquired data from the sensor but did not
- * forward it to upper layers (i.e. Android) yet. If so, report_buffer
- * contains that data. Valid values are 0: empty, 1: normal, 2: repeat
- * of last acquired value after timeout.
+ * This flag is set if we acquired data from the sensor but did not forward it to upper layers (i.e. Android) yet. If so, report_buffer
+ * contains that data. Valid values are 0: empty, 1: normal, 2: repeat of last acquired value after timeout.
*/
int report_pending;
- /*
- * This flag is set if we have a meta data event pending
- */
+ /* This flag is set if we have a meta data event pending */
int meta_data_pending;
/*
- * Timestamp closely matching the date of sampling, preferably retrieved
- * from a iio channel alongside sample data. Value zero indicates that
- * we couldn't get such a closely correlated timestamp, and that one
- * has to be generated before the report gets sent up to Android.
+ * Timestamp closely matching the date of sampling, preferably retrieved from a iio channel alongside sample data. Value zero indicates that
+ * we couldn't get such a closely correlated timestamp, and that one has to be generated before the report gets sent up to Android.
*/
int64_t report_ts;
int cal_level; /* 0 means not calibrated */
/*
- * Depending on the sensor, calibration may take too much time at
- * higher levels. Allow optional capping to a certain level.
+ * Depending on the sensor, calibration may take too much time at higher levels. Allow optional capping to a certain level.
*/
int max_cal_level;
float prev_val; /* Previously reported value, for on-change sensors */
/*
- * Certain sensors expose their readings through sysfs files that have
- * a long response time (100-200 ms for ALS). Rather than block our
- * global control loop for several hundred ms each second, offload those
- * lengthy blocking reads to dedicated threads, which will then report
+ * Certain sensors expose their readings through sysfs files that have a long response time (100-200 ms for ALS). Rather than block our
+ * global control loop for several hundred ms each second, offload those lengthy blocking reads to dedicated threads, which will then report
* their data through a fd that we can add to our poll fd set.
*/
int thread_data_fd[2];
pthread_t acquisition_thread;
- /* How many base sensors is the sensor depending on */
- int base_count;
+ int base_count; /* How many base sensors is the sensor depending on */
int base[MAX_SENSOR_BASES];
uint32_t quirks; /* Bit mask expressing the need for special tweaks */
/* Note: we may have to explicitely serialize access to some fields */
- int is_virtual;
- /*
- * Dependency count - for a real sensor how many active virtual sensors are
- * depending on it
- */
- uint32_t ref_count;
+ int is_virtual; /* Composite sensor, exposed from data acquired through other sensors */
- /*
- * Flag showing if a sensor was enabled directly by Android
- */
- uint32_t directly_enabled;
+ uint32_t ref_count; /* Dependency count - for a real sensor how many active virtual sensors are depending on it */
+
+ uint32_t directly_enabled; /* Flag showing if a sensor was enabled directly by Android */
/*
- * Current sample for a virtual sensor - when a report is ready we'll
- * keep the data here until it's finally processed. Can be modified for
+ * Current sample for a virtual sensor - when a report is ready we'll keep the data here until it's finally processed. Can be modified for
* more than one at a later time.
*/
sensors_event_t sample;
/*
- * If the QUIRK_FIELD_ORDERING bit is set in quirks, the contents of
- * this array are used in the finalization stage to swap sample fields
- * before transmitting them to Android ; they form a mapping between
- * the indices of the input and output arrays: ex: 0123 is identity for
+ * If the QUIRK_FIELD_ORDERING bit is set in quirks, the contents of this array are used in the finalization stage to swap sample fields
+ * before transmitting them to Android ; they form a mapping between the indices of the input and output arrays: ex: 0123 is identity for
* a sample containing 4 fields.
*/
unsigned char order[MAX_CHANNELS];
int history_index; /* Index of sample to evict next time */
/*
- * Event counter - will be used to check if we have a significant sample
- * for noisy sensors. We want to make sure we do not send any wrong
+ * Event counter - will be used to check if we have a significant sample for noisy sensors. We want to make sure we do not send any wrong
* events before filtering kicks in. We can also use it for statistics.
*/
uint64_t event_count;
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