/*
- * Copyright (C) 2014 Intel Corporation.
+ * Copyright (C) 2014-2015 Intel Corporation.
*/
#ifndef __COMMON_H__
#define __COMMON_H__
-#define MAX_DEVICES 8 /* Check iio devices 0 to MAX_DEVICES-1 */
-#define MAX_SENSORS 10 /* We can handle as many sensors */
+#define MAX_DEVICES 9 /* Check iio devices 0 to MAX_DEVICES-1 */
+#define MAX_SENSORS 12 /* We can handle as many sensors */
#define MAX_CHANNELS 4 /* We can handle as many channels per sensor */
+#define MAX_EVENTS 8 /* We can handle as many events per channel */
#define MAX_TRIGGERS 8 /* Check for triggers 0 to MAX_TRIGGERS-1 */
#define DEV_FILE_PATH "/dev/iio:device%d"
#define ENABLE_PATH BASE_PATH "buffer/enable"
#define NAME_PATH BASE_PATH "name"
#define TRIGGER_PATH BASE_PATH "trigger/current_trigger"
+#define EVENTS_PATH BASE_PATH "events/"
+#define SENSOR_ENABLE_PATH BASE_PATH "in_%s_en"
#define SENSOR_OFFSET_PATH BASE_PATH "in_%s_offset"
#define SENSOR_SCALE_PATH BASE_PATH "in_%s_scale"
#define SENSOR_SAMPLING_PATH BASE_PATH "in_%s_sampling_frequency"
#define DEVICE_SAMPLING_PATH BASE_PATH "sampling_frequency"
#define DEVICE_AVAIL_FREQ_PATH BASE_PATH "sampling_frequency_available"
#define ILLUMINATION_CALIBPATH BASE_PATH "in_illuminance_calibscale"
+#define SENSOR_CALIB_BIAS_PATH BASE_PATH "in_%s_calibbias"
#define PROP_BASE "ro.iio.%s.%s" /* Note: PROPERTY_KEY_MAX is small */
#define ARRAY_SIZE(x) sizeof(x)/sizeof(x[0])
#define REPORTING_MODE(x) ((x) & 0x06)
+#define FILTER_TYPE_NONE 0
+#define FILTER_TYPE_MOVING_AVERAGE 1
+#define FILTER_TYPE_MEDIAN 2
+
+#define MODE_AUTO 0 /* autodetect */
+#define MODE_POLL 1
+#define MODE_TRIGGER 2
+#define MODE_EVENT 3
+
+typedef struct
+{
+ const char *type; /* event type; e.g: transition */
+ const char *dir; /* event direction; e.g: rising */
+
+ /* sysfs entries located in /sys/bus/iio/devices/iio:deviceX/events/ */
+ const char *ev_en_path;
+ const char *ev_value_path;
+}
+event_descriptor_t;
+
typedef struct
{
const char *raw_path; /* _raw sysfs file name */
const char *input_path; /* _input sysfs file name */
const char *scale_path; /* _scale sysfs file name */
+
+ const int num_events;
+ event_descriptor_t event[MAX_EVENTS];
}
channel_descriptor_t;
{
int offset; /* Offset in bytes within the iio character device report */
int size; /* Field size in bytes */
- float scale; /* scale for each channel */
+ 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 raw_path_present; /* Flag signalling the presence of in_<sens>_<axis>_raw file */
+ int input_path_present; /* Flag signalling the presence of in_<sens>_input file */
}
channel_info_t;
int num_channels; /* Actual channel count ; 0 for poll mode sensors */
+ int mode; /* Usage mode, ex: poll, trigger ... */
+
/*
* 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
void *cal_data; /* Sensor calibration data, e.g. for magnetometer */
- /* Filtering data for noisy sensors */
- void* filter;
-
- float prev_val; /* Previously reported value, for on-change sensors */
+ void* filter; /* Filtering data for noisy sensors */
+ int filter_type;/* FILTER_ specification for this sensor ; default is FILTER_NONE */
+ /* Previously reported value, for on-change sensors */
+ union {
+ float data;
+ uint64_t data64;
+ } prev_val;
/*
* 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
*/
unsigned char order[MAX_CHANNELS];
- /* A few variables used for data filtering */
- float *history; /* Working buffer containing recorded samples */
- float *history_sum; /* The current sum of the history elements */
- int history_size; /* Number of recorded samples */
- int history_entries; /* How many of these are initialized */
- 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
* events before filtering kicks in. We can also use it for statistics.
*/
uint64_t event_count;
+
+ /* Some polled sensors need to be first enabled so that they start
+ * computing a set of values in hardware (e.g step counter). Enabling
+ * is done through a sysfs attribute in_<tag>_en
+ */
+ int needs_enable;
+
}
sensor_info_t;
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