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![Peter Meerwald](/assets/img/avatar_default.png)
maybe iio_modifier_names and iio_chan_type_name_spec should be exported from industrialio-core instead? Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
255 lines
5.9 KiB
C
255 lines
5.9 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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*/
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#define _GNU_SOURCE
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#include <unistd.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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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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};
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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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};
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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_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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};
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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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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_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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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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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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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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printf("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, ", event->timestamp);
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if (mod != IIO_NO_MOD) {
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printf("type: %s(%s), ",
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iio_chan_type_name_spec[type],
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iio_modifier_names[mod]);
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} else {
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printf("type: %s, ",
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iio_chan_type_name_spec[type]);
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}
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if (diff && chan >= 0 && chan2 >= 0)
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printf("channel: %d-%d, ", chan, chan2);
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else if (chan >= 0)
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printf("channel: %d, ", chan);
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printf("evtype: %s, direction: %s\n",
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iio_ev_type_text[ev_type],
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iio_ev_dir_text[dir]);
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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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printf("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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ret = -ENOMEM;
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goto error_ret;
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}
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} else {
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/* If we can't find a IIO device by name assume device_name is a
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IIO chrdev */
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chrdev_name = strdup(device_name);
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}
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fd = open(chrdev_name, 0);
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if (fd == -1) {
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fprintf(stdout, "Failed to open %s\n", chrdev_name);
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ret = -errno;
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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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close(fd);
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if (ret == -1 || event_fd == -1) {
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fprintf(stdout, "Failed to retrieve event fd\n");
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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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printf("nothing available\n");
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continue;
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} else {
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perror("Failed to read event from device");
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ret = -errno;
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break;
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}
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}
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print_event(&event);
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}
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close(event_fd);
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error_free_chrdev_name:
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free(chrdev_name);
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error_ret:
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return ret;
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}
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