1 /* Industrialio event test code.
3 * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
9 * This program is primarily intended as an example application.
10 * Reads the current buffer setup from sysfs and starts a short capture
11 * from the specified device, pretty printing the result after appropriate
15 * iio_event_monitor <device_name>
26 #include <sys/ioctl.h>
27 #include "iio_utils.h"
28 #include <linux/iio/events.h>
29 #include <linux/iio/types.h>
31 static const char * const iio_chan_type_name_spec[] = {
32 [IIO_VOLTAGE] = "voltage",
33 [IIO_CURRENT] = "current",
34 [IIO_POWER] = "power",
35 [IIO_ACCEL] = "accel",
36 [IIO_ANGL_VEL] = "anglvel",
38 [IIO_LIGHT] = "illuminance",
39 [IIO_INTENSITY] = "intensity",
40 [IIO_PROXIMITY] = "proximity",
42 [IIO_INCLI] = "incli",
45 [IIO_TIMESTAMP] = "timestamp",
46 [IIO_CAPACITANCE] = "capacitance",
47 [IIO_ALTVOLTAGE] = "altvoltage",
49 [IIO_PRESSURE] = "pressure",
50 [IIO_HUMIDITYRELATIVE] = "humidityrelative",
51 [IIO_ACTIVITY] = "activity",
52 [IIO_STEPS] = "steps",
53 [IIO_ENERGY] = "energy",
54 [IIO_DISTANCE] = "distance",
55 [IIO_VELOCITY] = "velocity",
58 static const char * const iio_ev_type_text[] = {
59 [IIO_EV_TYPE_THRESH] = "thresh",
60 [IIO_EV_TYPE_MAG] = "mag",
61 [IIO_EV_TYPE_ROC] = "roc",
62 [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
63 [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
64 [IIO_EV_TYPE_CHANGE] = "change",
67 static const char * const iio_ev_dir_text[] = {
68 [IIO_EV_DIR_EITHER] = "either",
69 [IIO_EV_DIR_RISING] = "rising",
70 [IIO_EV_DIR_FALLING] = "falling"
73 static const char * const iio_modifier_names[] = {
77 [IIO_MOD_X_AND_Y] = "x&y",
78 [IIO_MOD_X_AND_Z] = "x&z",
79 [IIO_MOD_Y_AND_Z] = "y&z",
80 [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
81 [IIO_MOD_X_OR_Y] = "x|y",
82 [IIO_MOD_X_OR_Z] = "x|z",
83 [IIO_MOD_Y_OR_Z] = "y|z",
84 [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
85 [IIO_MOD_LIGHT_BOTH] = "both",
86 [IIO_MOD_LIGHT_IR] = "ir",
87 [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
88 [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
89 [IIO_MOD_LIGHT_CLEAR] = "clear",
90 [IIO_MOD_LIGHT_RED] = "red",
91 [IIO_MOD_LIGHT_GREEN] = "green",
92 [IIO_MOD_LIGHT_BLUE] = "blue",
93 [IIO_MOD_QUATERNION] = "quaternion",
94 [IIO_MOD_TEMP_AMBIENT] = "ambient",
95 [IIO_MOD_TEMP_OBJECT] = "object",
96 [IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
97 [IIO_MOD_NORTH_TRUE] = "from_north_true",
98 [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
99 [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
100 [IIO_MOD_RUNNING] = "running",
101 [IIO_MOD_JOGGING] = "jogging",
102 [IIO_MOD_WALKING] = "walking",
103 [IIO_MOD_STILL] = "still",
104 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
107 static bool event_is_known(struct iio_event_data *event)
109 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
110 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
111 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
112 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
129 case IIO_CAPACITANCE:
133 case IIO_HUMIDITYRELATIVE:
149 case IIO_MOD_X_AND_Y:
150 case IIO_MOD_X_AND_Z:
151 case IIO_MOD_Y_AND_Z:
152 case IIO_MOD_X_AND_Y_AND_Z:
156 case IIO_MOD_X_OR_Y_OR_Z:
157 case IIO_MOD_LIGHT_BOTH:
158 case IIO_MOD_LIGHT_IR:
159 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
160 case IIO_MOD_SUM_SQUARED_X_Y_Z:
161 case IIO_MOD_LIGHT_CLEAR:
162 case IIO_MOD_LIGHT_RED:
163 case IIO_MOD_LIGHT_GREEN:
164 case IIO_MOD_LIGHT_BLUE:
165 case IIO_MOD_QUATERNION:
166 case IIO_MOD_TEMP_AMBIENT:
167 case IIO_MOD_TEMP_OBJECT:
168 case IIO_MOD_NORTH_MAGN:
169 case IIO_MOD_NORTH_TRUE:
170 case IIO_MOD_NORTH_MAGN_TILT_COMP:
171 case IIO_MOD_NORTH_TRUE_TILT_COMP:
172 case IIO_MOD_RUNNING:
173 case IIO_MOD_JOGGING:
174 case IIO_MOD_WALKING:
176 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
183 case IIO_EV_TYPE_THRESH:
184 case IIO_EV_TYPE_MAG:
185 case IIO_EV_TYPE_ROC:
186 case IIO_EV_TYPE_THRESH_ADAPTIVE:
187 case IIO_EV_TYPE_MAG_ADAPTIVE:
188 case IIO_EV_TYPE_CHANGE:
195 case IIO_EV_DIR_EITHER:
196 case IIO_EV_DIR_RISING:
197 case IIO_EV_DIR_FALLING:
198 case IIO_EV_DIR_NONE:
207 static void print_event(struct iio_event_data *event)
209 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
210 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
211 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
212 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
213 int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
214 int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
215 bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
217 if (!event_is_known(event)) {
218 fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
219 event->timestamp, event->id);
224 printf("Event: time: %lld, type: %s", event->timestamp,
225 iio_chan_type_name_spec[type]);
227 if (mod != IIO_NO_MOD)
228 printf("(%s)", iio_modifier_names[mod]);
231 printf(", channel: %d", chan);
232 if (diff && chan2 >= 0)
233 printf("-%d", chan2);
236 printf(", evtype: %s", iio_ev_type_text[ev_type]);
238 if (dir != IIO_EV_DIR_NONE)
239 printf(", direction: %s", iio_ev_dir_text[dir]);
244 int main(int argc, char **argv)
246 struct iio_event_data event;
247 const char *device_name;
254 fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
258 device_name = argv[1];
260 dev_num = find_type_by_name(device_name, "iio:device");
262 printf("Found IIO device with name %s with device number %d\n",
263 device_name, dev_num);
264 ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
269 * If we can't find an IIO device by name assume device_name is
272 chrdev_name = strdup(device_name);
277 fd = open(chrdev_name, 0);
280 fprintf(stderr, "Failed to open %s\n", chrdev_name);
281 goto error_free_chrdev_name;
284 ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
285 if (ret == -1 || event_fd == -1) {
287 fprintf(stderr, "Failed to retrieve event fd\n");
289 perror("Failed to close character device file");
291 goto error_free_chrdev_name;
294 if (close(fd) == -1) {
296 goto error_free_chrdev_name;
300 ret = read(event_fd, &event, sizeof(event));
302 if (errno == EAGAIN) {
303 fprintf(stderr, "nothing available\n");
307 perror("Failed to read event from device");
312 if (ret != sizeof(event)) {
313 fprintf(stderr, "Reading event failed!\n");
321 if (close(event_fd) == -1)
322 perror("Failed to close event file");
324 error_free_chrdev_name: