359 lines
8.6 KiB
C
359 lines
8.6 KiB
C
/* Industrialio event test code.
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*
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* Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is primarily intended as an example application.
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* Reads the current buffer setup from sysfs and starts a short capture
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* from the specified device, pretty printing the result after appropriate
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* conversion.
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*
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* Usage:
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* iio_event_monitor <device_name>
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <poll.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include "iio_utils.h"
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#include <linux/iio/events.h>
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#include <linux/iio/types.h>
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static const char * const iio_chan_type_name_spec[] = {
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[IIO_VOLTAGE] = "voltage",
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[IIO_CURRENT] = "current",
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[IIO_POWER] = "power",
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[IIO_ACCEL] = "accel",
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[IIO_ANGL_VEL] = "anglvel",
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[IIO_MAGN] = "magn",
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[IIO_LIGHT] = "illuminance",
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[IIO_INTENSITY] = "intensity",
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[IIO_PROXIMITY] = "proximity",
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[IIO_TEMP] = "temp",
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[IIO_INCLI] = "incli",
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[IIO_ROT] = "rot",
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[IIO_ANGL] = "angl",
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[IIO_TIMESTAMP] = "timestamp",
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[IIO_CAPACITANCE] = "capacitance",
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[IIO_ALTVOLTAGE] = "altvoltage",
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[IIO_CCT] = "cct",
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[IIO_PRESSURE] = "pressure",
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[IIO_HUMIDITYRELATIVE] = "humidityrelative",
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[IIO_ACTIVITY] = "activity",
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[IIO_STEPS] = "steps",
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[IIO_ENERGY] = "energy",
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[IIO_DISTANCE] = "distance",
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[IIO_VELOCITY] = "velocity",
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[IIO_CONCENTRATION] = "concentration",
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[IIO_RESISTANCE] = "resistance",
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[IIO_PH] = "ph",
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[IIO_UVINDEX] = "uvindex",
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[IIO_GRAVITY] = "gravity",
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[IIO_POSITIONRELATIVE] = "positionrelative",
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[IIO_PHASE] = "phase",
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};
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static const char * const iio_ev_type_text[] = {
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[IIO_EV_TYPE_THRESH] = "thresh",
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[IIO_EV_TYPE_MAG] = "mag",
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[IIO_EV_TYPE_ROC] = "roc",
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[IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
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[IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
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[IIO_EV_TYPE_CHANGE] = "change",
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};
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static const char * const iio_ev_dir_text[] = {
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[IIO_EV_DIR_EITHER] = "either",
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[IIO_EV_DIR_RISING] = "rising",
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[IIO_EV_DIR_FALLING] = "falling"
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};
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static const char * const iio_modifier_names[] = {
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[IIO_MOD_X] = "x",
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[IIO_MOD_Y] = "y",
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[IIO_MOD_Z] = "z",
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[IIO_MOD_X_AND_Y] = "x&y",
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[IIO_MOD_X_AND_Z] = "x&z",
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[IIO_MOD_Y_AND_Z] = "y&z",
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[IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
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[IIO_MOD_X_OR_Y] = "x|y",
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[IIO_MOD_X_OR_Z] = "x|z",
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[IIO_MOD_Y_OR_Z] = "y|z",
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[IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
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[IIO_MOD_LIGHT_BOTH] = "both",
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[IIO_MOD_LIGHT_IR] = "ir",
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[IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
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[IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
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[IIO_MOD_LIGHT_CLEAR] = "clear",
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[IIO_MOD_LIGHT_RED] = "red",
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[IIO_MOD_LIGHT_GREEN] = "green",
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[IIO_MOD_LIGHT_BLUE] = "blue",
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[IIO_MOD_LIGHT_UV] = "uv",
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[IIO_MOD_LIGHT_DUV] = "duv",
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[IIO_MOD_QUATERNION] = "quaternion",
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[IIO_MOD_TEMP_AMBIENT] = "ambient",
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[IIO_MOD_TEMP_OBJECT] = "object",
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[IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
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[IIO_MOD_NORTH_TRUE] = "from_north_true",
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[IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
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[IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
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[IIO_MOD_RUNNING] = "running",
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[IIO_MOD_JOGGING] = "jogging",
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[IIO_MOD_WALKING] = "walking",
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[IIO_MOD_STILL] = "still",
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[IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
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[IIO_MOD_I] = "i",
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[IIO_MOD_Q] = "q",
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[IIO_MOD_CO2] = "co2",
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[IIO_MOD_VOC] = "voc",
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};
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static bool event_is_known(struct iio_event_data *event)
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{
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enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
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enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
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enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
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enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
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switch (type) {
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case IIO_VOLTAGE:
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case IIO_CURRENT:
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case IIO_POWER:
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case IIO_ACCEL:
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case IIO_ANGL_VEL:
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case IIO_MAGN:
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case IIO_LIGHT:
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case IIO_INTENSITY:
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case IIO_PROXIMITY:
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case IIO_TEMP:
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case IIO_INCLI:
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case IIO_ROT:
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case IIO_ANGL:
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case IIO_TIMESTAMP:
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case IIO_CAPACITANCE:
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case IIO_ALTVOLTAGE:
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case IIO_CCT:
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case IIO_PRESSURE:
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case IIO_HUMIDITYRELATIVE:
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case IIO_ACTIVITY:
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case IIO_STEPS:
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case IIO_ENERGY:
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case IIO_DISTANCE:
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case IIO_VELOCITY:
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case IIO_CONCENTRATION:
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case IIO_RESISTANCE:
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case IIO_PH:
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case IIO_UVINDEX:
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case IIO_GRAVITY:
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case IIO_POSITIONRELATIVE:
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case IIO_PHASE:
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break;
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default:
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return false;
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}
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switch (mod) {
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case IIO_NO_MOD:
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case IIO_MOD_X:
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case IIO_MOD_Y:
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case IIO_MOD_Z:
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case IIO_MOD_X_AND_Y:
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case IIO_MOD_X_AND_Z:
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case IIO_MOD_Y_AND_Z:
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case IIO_MOD_X_AND_Y_AND_Z:
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case IIO_MOD_X_OR_Y:
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case IIO_MOD_X_OR_Z:
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case IIO_MOD_Y_OR_Z:
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case IIO_MOD_X_OR_Y_OR_Z:
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case IIO_MOD_LIGHT_BOTH:
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case IIO_MOD_LIGHT_IR:
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case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
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case IIO_MOD_SUM_SQUARED_X_Y_Z:
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case IIO_MOD_LIGHT_CLEAR:
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case IIO_MOD_LIGHT_RED:
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case IIO_MOD_LIGHT_GREEN:
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case IIO_MOD_LIGHT_BLUE:
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case IIO_MOD_LIGHT_UV:
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case IIO_MOD_LIGHT_DUV:
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case IIO_MOD_QUATERNION:
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case IIO_MOD_TEMP_AMBIENT:
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case IIO_MOD_TEMP_OBJECT:
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case IIO_MOD_NORTH_MAGN:
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case IIO_MOD_NORTH_TRUE:
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case IIO_MOD_NORTH_MAGN_TILT_COMP:
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case IIO_MOD_NORTH_TRUE_TILT_COMP:
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case IIO_MOD_RUNNING:
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case IIO_MOD_JOGGING:
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case IIO_MOD_WALKING:
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case IIO_MOD_STILL:
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case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
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case IIO_MOD_I:
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case IIO_MOD_Q:
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case IIO_MOD_CO2:
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case IIO_MOD_VOC:
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break;
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default:
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return false;
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}
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switch (ev_type) {
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case IIO_EV_TYPE_THRESH:
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case IIO_EV_TYPE_MAG:
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case IIO_EV_TYPE_ROC:
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case IIO_EV_TYPE_THRESH_ADAPTIVE:
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case IIO_EV_TYPE_MAG_ADAPTIVE:
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case IIO_EV_TYPE_CHANGE:
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break;
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default:
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return false;
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}
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switch (dir) {
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case IIO_EV_DIR_EITHER:
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case IIO_EV_DIR_RISING:
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case IIO_EV_DIR_FALLING:
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case IIO_EV_DIR_NONE:
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break;
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default:
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return false;
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}
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return true;
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}
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static void print_event(struct iio_event_data *event)
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{
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enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
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enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
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enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
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enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
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int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
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int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
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bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
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if (!event_is_known(event)) {
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fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
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event->timestamp, event->id);
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return;
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}
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printf("Event: time: %lld, type: %s", event->timestamp,
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iio_chan_type_name_spec[type]);
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if (mod != IIO_NO_MOD)
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printf("(%s)", iio_modifier_names[mod]);
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if (chan >= 0) {
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printf(", channel: %d", chan);
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if (diff && chan2 >= 0)
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printf("-%d", chan2);
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}
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printf(", evtype: %s", iio_ev_type_text[ev_type]);
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if (dir != IIO_EV_DIR_NONE)
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printf(", direction: %s", iio_ev_dir_text[dir]);
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printf("\n");
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}
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int main(int argc, char **argv)
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{
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struct iio_event_data event;
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const char *device_name;
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char *chrdev_name;
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int ret;
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int dev_num;
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int fd, event_fd;
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if (argc <= 1) {
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fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
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return -1;
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}
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device_name = argv[1];
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dev_num = find_type_by_name(device_name, "iio:device");
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if (dev_num >= 0) {
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printf("Found IIO device with name %s with device number %d\n",
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device_name, dev_num);
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ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
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if (ret < 0)
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return -ENOMEM;
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} else {
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/*
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* If we can't find an IIO device by name assume device_name is
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* an IIO chrdev
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*/
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chrdev_name = strdup(device_name);
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if (!chrdev_name)
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return -ENOMEM;
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}
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fd = open(chrdev_name, 0);
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if (fd == -1) {
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ret = -errno;
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fprintf(stderr, "Failed to open %s\n", chrdev_name);
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goto error_free_chrdev_name;
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}
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ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
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if (ret == -1 || event_fd == -1) {
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ret = -errno;
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if (ret == -ENODEV)
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fprintf(stderr,
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"This device does not support events\n");
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else
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fprintf(stderr, "Failed to retrieve event fd\n");
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if (close(fd) == -1)
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perror("Failed to close character device file");
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goto error_free_chrdev_name;
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}
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if (close(fd) == -1) {
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ret = -errno;
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goto error_free_chrdev_name;
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}
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while (true) {
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ret = read(event_fd, &event, sizeof(event));
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if (ret == -1) {
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if (errno == EAGAIN) {
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fprintf(stderr, "nothing available\n");
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continue;
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} else {
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ret = -errno;
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perror("Failed to read event from device");
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break;
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}
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}
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if (ret != sizeof(event)) {
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fprintf(stderr, "Reading event failed!\n");
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ret = -EIO;
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break;
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}
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print_event(&event);
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}
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if (close(event_fd) == -1)
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perror("Failed to close event file");
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error_free_chrdev_name:
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free(chrdev_name);
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return ret;
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}
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