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![Cristina Opriceana](/assets/img/avatar_default.png)
This patch indends to make some cleanup and send printf error messages to stderr. The changes were performed with coccinelle for failure messages and manual for other cases, such as wrong usage messages. Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com> Reviewed-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
328 lines
7.9 KiB
C
328 lines
7.9 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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};
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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_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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};
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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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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_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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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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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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