#define MAX_DEVICES 8 /* Check iio devices 0 to MAX_DEVICES-1 */
#define MAX_SENSORS 10 /* We can handle as many sensors */
#define MAX_CHANNELS 4 /* We can handle as many channels per sensor */
+#define MAX_TRIGGERS 8 /* Check for triggers 0 to MAX_TRIGGERS-1 */
-#define DEV_FILE_PATH "/dev/iio:device%d"
-
-#define BASE_PATH "/sys/bus/iio/devices/iio:device%d/"
-
+#define DEV_FILE_PATH "/dev/iio:device%d"
+#define BASE_PATH "/sys/bus/iio/devices/iio:device%d/"
+#define TRIGGER_FILE_PATH "/sys/bus/iio/devices/trigger%d/name"
#define CHANNEL_PATH BASE_PATH "scan_elements/"
#define ENABLE_PATH BASE_PATH "buffer/enable"
#define PROP_BASE "ro.iio.%s.%s" /* Note: PROPERTY_KEY_MAX is small */
+#define MAX_EVENTS 800 /* 800 hz */
#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_NAME_SIZE 32
-#define CAP_SENSOR_MAX_FREQUENCY 1000
#define ARRAY_SIZE(x) sizeof(x)/sizeof(x[0])
-
+#define REPORTING_MODE(x) ((x) & 0x06)
+
+#ifdef __LP64__
+ typedef uint64_t flag_t;
+ typedef int64_t max_delay_t;
+#else
+ typedef uint32_t flag_t;
+ typedef int32_t max_delay_t;
+#endif
struct channel_descriptor_t
{
float (*transform)(int s, int c, unsigned char* sample_data);
/* Function called once per sample */
- void (*finalize)(int s, struct sensors_event_t* data);
+ int (*finalize)(int s, struct sensors_event_t* data);
};
struct sensor_info_t
{
- char friendly_name[MAX_NAME_SIZE]; /* ex: Accelerometer */
- char internal_name[MAX_NAME_SIZE]; /* ex: accel_3d */
- char vendor_name[MAX_NAME_SIZE]; /* ex: Intel */
-
+ char friendly_name[MAX_NAME_SIZE]; /* ex: Accelerometer */
+ char internal_name[MAX_NAME_SIZE]; /* ex: accel_3d */
+ char vendor_name[MAX_NAME_SIZE]; /* ex: Intel */
+ char init_trigger_name[MAX_NAME_SIZE]; /* ex: accel-name-dev1 */
+ char motion_trigger_name[MAX_NAME_SIZE];/* ex: accel-any-motion-dev1 */
float max_range;
float resolution;
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.
+ */
+ 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 */
- int sampling_rate; /* requested events / second */
+ float sampling_rate; /* requested events / second */
int dev_num; /* Associated iio dev num, ex: 3 for /dev/iio:device3 */
int enable_count;
*/
int64_t report_ts;
+ /* Buffer containing the last generated sensor report for this sensor */
unsigned char report_buffer[MAX_SENSOR_REPORT_SIZE];
- int64_t last_integration_ts; /* Last time an event was reported */
+ /* Whether or not the above buffer contains data from a device report */
+ int report_initialized;
struct sample_ops_t ops;
- int calibrated;
+ int cal_level; /* 0 means not calibrated */
void* cal_data;
+
+ /* Filtering data for noisy sensors */
+ void* filter;
+
+ 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
+ * their data through a fd that we can add to our poll fd set.
+ */
+ int thread_data_fd[2];
+ pthread_t acquisition_thread;
+
+ /* For cal-uncal sensor pairs - index to the pair sensor in sensor_info */
+ int pair_idx;
+
+ uint32_t quirks; /* Bit mask expressing the need for special tweaks */
+
/* Note: we may have to explicitely serialize access to some fields */
+
+
+ /*
+ * 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];
+
+ /* 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 */
};
/* Reference a few commonly used variables... */
extern int sensor_count;
+extern struct sensor_t sensor_desc[MAX_SENSORS];
extern struct sensor_info_t sensor_info[MAX_SENSORS];
extern struct sensor_catalog_entry_t sensor_catalog[];
OSDN Git Service
