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1// SPDX-License-Identifier: GPL-2.0-only
2/* Industrialio event test code.
3 *
4 * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
5 *
6 * This program is primarily intended as an example application.
7 * Reads the current buffer setup from sysfs and starts a short capture
8 * from the specified device, pretty printing the result after appropriate
9 * conversion.
10 *
11 * Usage:
12 * iio_event_monitor <device_name>
13 */
14
15#include <unistd.h>
16#include <stdlib.h>
17#include <stdbool.h>
18#include <stdio.h>
19#include <errno.h>
20#include <string.h>
21#include <poll.h>
22#include <fcntl.h>
23#include <sys/ioctl.h>
24#include "iio_utils.h"
25#include <linux/iio/events.h>
26#include <linux/iio/types.h>
27
28static const char * const iio_chan_type_name_spec[] = {
29 [IIO_VOLTAGE] = "voltage",
30 [IIO_CURRENT] = "current",
31 [IIO_POWER] = "power",
32 [IIO_ACCEL] = "accel",
33 [IIO_ANGL_VEL] = "anglvel",
34 [IIO_MAGN] = "magn",
35 [IIO_LIGHT] = "illuminance",
36 [IIO_INTENSITY] = "intensity",
37 [IIO_PROXIMITY] = "proximity",
38 [IIO_TEMP] = "temp",
39 [IIO_INCLI] = "incli",
40 [IIO_ROT] = "rot",
41 [IIO_ANGL] = "angl",
42 [IIO_TIMESTAMP] = "timestamp",
43 [IIO_CAPACITANCE] = "capacitance",
44 [IIO_ALTVOLTAGE] = "altvoltage",
45 [IIO_CCT] = "cct",
46 [IIO_PRESSURE] = "pressure",
47 [IIO_HUMIDITYRELATIVE] = "humidityrelative",
48 [IIO_ACTIVITY] = "activity",
49 [IIO_STEPS] = "steps",
50 [IIO_ENERGY] = "energy",
51 [IIO_DISTANCE] = "distance",
52 [IIO_VELOCITY] = "velocity",
53 [IIO_CONCENTRATION] = "concentration",
54 [IIO_RESISTANCE] = "resistance",
55 [IIO_PH] = "ph",
56 [IIO_UVINDEX] = "uvindex",
57 [IIO_GRAVITY] = "gravity",
58 [IIO_POSITIONRELATIVE] = "positionrelative",
59 [IIO_PHASE] = "phase",
60 [IIO_MASSCONCENTRATION] = "massconcentration",
61};
62
63static const char * const iio_ev_type_text[] = {
64 [IIO_EV_TYPE_THRESH] = "thresh",
65 [IIO_EV_TYPE_MAG] = "mag",
66 [IIO_EV_TYPE_ROC] = "roc",
67 [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
68 [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
69 [IIO_EV_TYPE_CHANGE] = "change",
70};
71
72static const char * const iio_ev_dir_text[] = {
73 [IIO_EV_DIR_EITHER] = "either",
74 [IIO_EV_DIR_RISING] = "rising",
75 [IIO_EV_DIR_FALLING] = "falling"
76};
77
78static const char * const iio_modifier_names[] = {
79 [IIO_MOD_X] = "x",
80 [IIO_MOD_Y] = "y",
81 [IIO_MOD_Z] = "z",
82 [IIO_MOD_X_AND_Y] = "x&y",
83 [IIO_MOD_X_AND_Z] = "x&z",
84 [IIO_MOD_Y_AND_Z] = "y&z",
85 [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
86 [IIO_MOD_X_OR_Y] = "x|y",
87 [IIO_MOD_X_OR_Z] = "x|z",
88 [IIO_MOD_Y_OR_Z] = "y|z",
89 [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
90 [IIO_MOD_LIGHT_BOTH] = "both",
91 [IIO_MOD_LIGHT_IR] = "ir",
92 [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
93 [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
94 [IIO_MOD_LIGHT_CLEAR] = "clear",
95 [IIO_MOD_LIGHT_RED] = "red",
96 [IIO_MOD_LIGHT_GREEN] = "green",
97 [IIO_MOD_LIGHT_BLUE] = "blue",
98 [IIO_MOD_LIGHT_UV] = "uv",
99 [IIO_MOD_LIGHT_DUV] = "duv",
100 [IIO_MOD_QUATERNION] = "quaternion",
101 [IIO_MOD_TEMP_AMBIENT] = "ambient",
102 [IIO_MOD_TEMP_OBJECT] = "object",
103 [IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
104 [IIO_MOD_NORTH_TRUE] = "from_north_true",
105 [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
106 [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
107 [IIO_MOD_RUNNING] = "running",
108 [IIO_MOD_JOGGING] = "jogging",
109 [IIO_MOD_WALKING] = "walking",
110 [IIO_MOD_STILL] = "still",
111 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
112 [IIO_MOD_I] = "i",
113 [IIO_MOD_Q] = "q",
114 [IIO_MOD_CO2] = "co2",
115 [IIO_MOD_ETHANOL] = "ethanol",
116 [IIO_MOD_H2] = "h2",
117 [IIO_MOD_VOC] = "voc",
118 [IIO_MOD_PM1] = "pm1",
119 [IIO_MOD_PM2P5] = "pm2p5",
120 [IIO_MOD_PM4] = "pm4",
121 [IIO_MOD_PM10] = "pm10",
122};
123
124static bool event_is_known(struct iio_event_data *event)
125{
126 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
127 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
128 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
129 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
130
131 switch (type) {
132 case IIO_VOLTAGE:
133 case IIO_CURRENT:
134 case IIO_POWER:
135 case IIO_ACCEL:
136 case IIO_ANGL_VEL:
137 case IIO_MAGN:
138 case IIO_LIGHT:
139 case IIO_INTENSITY:
140 case IIO_PROXIMITY:
141 case IIO_TEMP:
142 case IIO_INCLI:
143 case IIO_ROT:
144 case IIO_ANGL:
145 case IIO_TIMESTAMP:
146 case IIO_CAPACITANCE:
147 case IIO_ALTVOLTAGE:
148 case IIO_CCT:
149 case IIO_PRESSURE:
150 case IIO_HUMIDITYRELATIVE:
151 case IIO_ACTIVITY:
152 case IIO_STEPS:
153 case IIO_ENERGY:
154 case IIO_DISTANCE:
155 case IIO_VELOCITY:
156 case IIO_CONCENTRATION:
157 case IIO_RESISTANCE:
158 case IIO_PH:
159 case IIO_UVINDEX:
160 case IIO_GRAVITY:
161 case IIO_POSITIONRELATIVE:
162 case IIO_PHASE:
163 case IIO_MASSCONCENTRATION:
164 break;
165 default:
166 return false;
167 }
168
169 switch (mod) {
170 case IIO_NO_MOD:
171 case IIO_MOD_X:
172 case IIO_MOD_Y:
173 case IIO_MOD_Z:
174 case IIO_MOD_X_AND_Y:
175 case IIO_MOD_X_AND_Z:
176 case IIO_MOD_Y_AND_Z:
177 case IIO_MOD_X_AND_Y_AND_Z:
178 case IIO_MOD_X_OR_Y:
179 case IIO_MOD_X_OR_Z:
180 case IIO_MOD_Y_OR_Z:
181 case IIO_MOD_X_OR_Y_OR_Z:
182 case IIO_MOD_LIGHT_BOTH:
183 case IIO_MOD_LIGHT_IR:
184 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
185 case IIO_MOD_SUM_SQUARED_X_Y_Z:
186 case IIO_MOD_LIGHT_CLEAR:
187 case IIO_MOD_LIGHT_RED:
188 case IIO_MOD_LIGHT_GREEN:
189 case IIO_MOD_LIGHT_BLUE:
190 case IIO_MOD_LIGHT_UV:
191 case IIO_MOD_LIGHT_DUV:
192 case IIO_MOD_QUATERNION:
193 case IIO_MOD_TEMP_AMBIENT:
194 case IIO_MOD_TEMP_OBJECT:
195 case IIO_MOD_NORTH_MAGN:
196 case IIO_MOD_NORTH_TRUE:
197 case IIO_MOD_NORTH_MAGN_TILT_COMP:
198 case IIO_MOD_NORTH_TRUE_TILT_COMP:
199 case IIO_MOD_RUNNING:
200 case IIO_MOD_JOGGING:
201 case IIO_MOD_WALKING:
202 case IIO_MOD_STILL:
203 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
204 case IIO_MOD_I:
205 case IIO_MOD_Q:
206 case IIO_MOD_CO2:
207 case IIO_MOD_ETHANOL:
208 case IIO_MOD_H2:
209 case IIO_MOD_VOC:
210 case IIO_MOD_PM1:
211 case IIO_MOD_PM2P5:
212 case IIO_MOD_PM4:
213 case IIO_MOD_PM10:
214 break;
215 default:
216 return false;
217 }
218
219 switch (ev_type) {
220 case IIO_EV_TYPE_THRESH:
221 case IIO_EV_TYPE_MAG:
222 case IIO_EV_TYPE_ROC:
223 case IIO_EV_TYPE_THRESH_ADAPTIVE:
224 case IIO_EV_TYPE_MAG_ADAPTIVE:
225 case IIO_EV_TYPE_CHANGE:
226 break;
227 default:
228 return false;
229 }
230
231 switch (dir) {
232 case IIO_EV_DIR_EITHER:
233 case IIO_EV_DIR_RISING:
234 case IIO_EV_DIR_FALLING:
235 case IIO_EV_DIR_NONE:
236 break;
237 default:
238 return false;
239 }
240
241 return true;
242}
243
244static void print_event(struct iio_event_data *event)
245{
246 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
247 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
248 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
249 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
250 int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
251 int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
252 bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
253
254 if (!event_is_known(event)) {
255 fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
256 event->timestamp, event->id);
257
258 return;
259 }
260
261 printf("Event: time: %lld, type: %s", event->timestamp,
262 iio_chan_type_name_spec[type]);
263
264 if (mod != IIO_NO_MOD)
265 printf("(%s)", iio_modifier_names[mod]);
266
267 if (chan >= 0) {
268 printf(", channel: %d", chan);
269 if (diff && chan2 >= 0)
270 printf("-%d", chan2);
271 }
272
273 printf(", evtype: %s", iio_ev_type_text[ev_type]);
274
275 if (dir != IIO_EV_DIR_NONE)
276 printf(", direction: %s", iio_ev_dir_text[dir]);
277
278 printf("\n");
279}
280
281int main(int argc, char **argv)
282{
283 struct iio_event_data event;
284 const char *device_name;
285 char *chrdev_name;
286 int ret;
287 int dev_num;
288 int fd, event_fd;
289
290 if (argc <= 1) {
291 fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
292 return -1;
293 }
294
295 device_name = argv[1];
296
297 dev_num = find_type_by_name(device_name, "iio:device");
298 if (dev_num >= 0) {
299 printf("Found IIO device with name %s with device number %d\n",
300 device_name, dev_num);
301 ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
302 if (ret < 0)
303 return -ENOMEM;
304 } else {
305 /*
306 * If we can't find an IIO device by name assume device_name is
307 * an IIO chrdev
308 */
309 chrdev_name = strdup(device_name);
310 if (!chrdev_name)
311 return -ENOMEM;
312 }
313
314 fd = open(chrdev_name, 0);
315 if (fd == -1) {
316 ret = -errno;
317 fprintf(stderr, "Failed to open %s\n", chrdev_name);
318 goto error_free_chrdev_name;
319 }
320
321 ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
322 if (ret == -1 || event_fd == -1) {
323 ret = -errno;
324 if (ret == -ENODEV)
325 fprintf(stderr,
326 "This device does not support events\n");
327 else
328 fprintf(stderr, "Failed to retrieve event fd\n");
329 if (close(fd) == -1)
330 perror("Failed to close character device file");
331
332 goto error_free_chrdev_name;
333 }
334
335 if (close(fd) == -1) {
336 ret = -errno;
337 goto error_free_chrdev_name;
338 }
339
340 while (true) {
341 ret = read(event_fd, &event, sizeof(event));
342 if (ret == -1) {
343 if (errno == EAGAIN) {
344 fprintf(stderr, "nothing available\n");
345 continue;
346 } else {
347 ret = -errno;
348 perror("Failed to read event from device");
349 break;
350 }
351 }
352
353 if (ret != sizeof(event)) {
354 fprintf(stderr, "Reading event failed!\n");
355 ret = -EIO;
356 break;
357 }
358
359 print_event(&event);
360 }
361
362 if (close(event_fd) == -1)
363 perror("Failed to close event file");
364
365error_free_chrdev_name:
366 free(chrdev_name);
367
368 return ret;
369}
1/* Industrialio event test code.
2 *
3 * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
4 *
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.
8 *
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
12 * conversion.
13 *
14 * Usage:
15 * iio_event_monitor <device_name>
16 */
17
18#include <unistd.h>
19#include <stdlib.h>
20#include <stdbool.h>
21#include <stdio.h>
22#include <errno.h>
23#include <string.h>
24#include <poll.h>
25#include <fcntl.h>
26#include <sys/ioctl.h>
27#include "iio_utils.h"
28#include <linux/iio/events.h>
29#include <linux/iio/types.h>
30
31static 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",
37 [IIO_MAGN] = "magn",
38 [IIO_LIGHT] = "illuminance",
39 [IIO_INTENSITY] = "intensity",
40 [IIO_PROXIMITY] = "proximity",
41 [IIO_TEMP] = "temp",
42 [IIO_INCLI] = "incli",
43 [IIO_ROT] = "rot",
44 [IIO_ANGL] = "angl",
45 [IIO_TIMESTAMP] = "timestamp",
46 [IIO_CAPACITANCE] = "capacitance",
47 [IIO_ALTVOLTAGE] = "altvoltage",
48 [IIO_CCT] = "cct",
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",
56 [IIO_CONCENTRATION] = "concentration",
57 [IIO_RESISTANCE] = "resistance",
58 [IIO_PH] = "ph",
59 [IIO_UVINDEX] = "uvindex",
60 [IIO_GRAVITY] = "gravity",
61};
62
63static const char * const iio_ev_type_text[] = {
64 [IIO_EV_TYPE_THRESH] = "thresh",
65 [IIO_EV_TYPE_MAG] = "mag",
66 [IIO_EV_TYPE_ROC] = "roc",
67 [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
68 [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
69 [IIO_EV_TYPE_CHANGE] = "change",
70};
71
72static const char * const iio_ev_dir_text[] = {
73 [IIO_EV_DIR_EITHER] = "either",
74 [IIO_EV_DIR_RISING] = "rising",
75 [IIO_EV_DIR_FALLING] = "falling"
76};
77
78static const char * const iio_modifier_names[] = {
79 [IIO_MOD_X] = "x",
80 [IIO_MOD_Y] = "y",
81 [IIO_MOD_Z] = "z",
82 [IIO_MOD_X_AND_Y] = "x&y",
83 [IIO_MOD_X_AND_Z] = "x&z",
84 [IIO_MOD_Y_AND_Z] = "y&z",
85 [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
86 [IIO_MOD_X_OR_Y] = "x|y",
87 [IIO_MOD_X_OR_Z] = "x|z",
88 [IIO_MOD_Y_OR_Z] = "y|z",
89 [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
90 [IIO_MOD_LIGHT_BOTH] = "both",
91 [IIO_MOD_LIGHT_IR] = "ir",
92 [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
93 [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
94 [IIO_MOD_LIGHT_CLEAR] = "clear",
95 [IIO_MOD_LIGHT_RED] = "red",
96 [IIO_MOD_LIGHT_GREEN] = "green",
97 [IIO_MOD_LIGHT_BLUE] = "blue",
98 [IIO_MOD_LIGHT_UV] = "uv",
99 [IIO_MOD_QUATERNION] = "quaternion",
100 [IIO_MOD_TEMP_AMBIENT] = "ambient",
101 [IIO_MOD_TEMP_OBJECT] = "object",
102 [IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
103 [IIO_MOD_NORTH_TRUE] = "from_north_true",
104 [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
105 [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
106 [IIO_MOD_RUNNING] = "running",
107 [IIO_MOD_JOGGING] = "jogging",
108 [IIO_MOD_WALKING] = "walking",
109 [IIO_MOD_STILL] = "still",
110 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
111 [IIO_MOD_I] = "i",
112 [IIO_MOD_Q] = "q",
113 [IIO_MOD_CO2] = "co2",
114 [IIO_MOD_VOC] = "voc",
115};
116
117static bool event_is_known(struct iio_event_data *event)
118{
119 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
120 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
121 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
122 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
123
124 switch (type) {
125 case IIO_VOLTAGE:
126 case IIO_CURRENT:
127 case IIO_POWER:
128 case IIO_ACCEL:
129 case IIO_ANGL_VEL:
130 case IIO_MAGN:
131 case IIO_LIGHT:
132 case IIO_INTENSITY:
133 case IIO_PROXIMITY:
134 case IIO_TEMP:
135 case IIO_INCLI:
136 case IIO_ROT:
137 case IIO_ANGL:
138 case IIO_TIMESTAMP:
139 case IIO_CAPACITANCE:
140 case IIO_ALTVOLTAGE:
141 case IIO_CCT:
142 case IIO_PRESSURE:
143 case IIO_HUMIDITYRELATIVE:
144 case IIO_ACTIVITY:
145 case IIO_STEPS:
146 case IIO_ENERGY:
147 case IIO_DISTANCE:
148 case IIO_VELOCITY:
149 case IIO_CONCENTRATION:
150 case IIO_RESISTANCE:
151 case IIO_PH:
152 case IIO_UVINDEX:
153 case IIO_GRAVITY:
154 break;
155 default:
156 return false;
157 }
158
159 switch (mod) {
160 case IIO_NO_MOD:
161 case IIO_MOD_X:
162 case IIO_MOD_Y:
163 case IIO_MOD_Z:
164 case IIO_MOD_X_AND_Y:
165 case IIO_MOD_X_AND_Z:
166 case IIO_MOD_Y_AND_Z:
167 case IIO_MOD_X_AND_Y_AND_Z:
168 case IIO_MOD_X_OR_Y:
169 case IIO_MOD_X_OR_Z:
170 case IIO_MOD_Y_OR_Z:
171 case IIO_MOD_X_OR_Y_OR_Z:
172 case IIO_MOD_LIGHT_BOTH:
173 case IIO_MOD_LIGHT_IR:
174 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
175 case IIO_MOD_SUM_SQUARED_X_Y_Z:
176 case IIO_MOD_LIGHT_CLEAR:
177 case IIO_MOD_LIGHT_RED:
178 case IIO_MOD_LIGHT_GREEN:
179 case IIO_MOD_LIGHT_BLUE:
180 case IIO_MOD_LIGHT_UV:
181 case IIO_MOD_QUATERNION:
182 case IIO_MOD_TEMP_AMBIENT:
183 case IIO_MOD_TEMP_OBJECT:
184 case IIO_MOD_NORTH_MAGN:
185 case IIO_MOD_NORTH_TRUE:
186 case IIO_MOD_NORTH_MAGN_TILT_COMP:
187 case IIO_MOD_NORTH_TRUE_TILT_COMP:
188 case IIO_MOD_RUNNING:
189 case IIO_MOD_JOGGING:
190 case IIO_MOD_WALKING:
191 case IIO_MOD_STILL:
192 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
193 case IIO_MOD_I:
194 case IIO_MOD_Q:
195 case IIO_MOD_CO2:
196 case IIO_MOD_VOC:
197 break;
198 default:
199 return false;
200 }
201
202 switch (ev_type) {
203 case IIO_EV_TYPE_THRESH:
204 case IIO_EV_TYPE_MAG:
205 case IIO_EV_TYPE_ROC:
206 case IIO_EV_TYPE_THRESH_ADAPTIVE:
207 case IIO_EV_TYPE_MAG_ADAPTIVE:
208 case IIO_EV_TYPE_CHANGE:
209 break;
210 default:
211 return false;
212 }
213
214 switch (dir) {
215 case IIO_EV_DIR_EITHER:
216 case IIO_EV_DIR_RISING:
217 case IIO_EV_DIR_FALLING:
218 case IIO_EV_DIR_NONE:
219 break;
220 default:
221 return false;
222 }
223
224 return true;
225}
226
227static void print_event(struct iio_event_data *event)
228{
229 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
230 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
231 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
232 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
233 int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
234 int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
235 bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
236
237 if (!event_is_known(event)) {
238 fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
239 event->timestamp, event->id);
240
241 return;
242 }
243
244 printf("Event: time: %lld, type: %s", event->timestamp,
245 iio_chan_type_name_spec[type]);
246
247 if (mod != IIO_NO_MOD)
248 printf("(%s)", iio_modifier_names[mod]);
249
250 if (chan >= 0) {
251 printf(", channel: %d", chan);
252 if (diff && chan2 >= 0)
253 printf("-%d", chan2);
254 }
255
256 printf(", evtype: %s", iio_ev_type_text[ev_type]);
257
258 if (dir != IIO_EV_DIR_NONE)
259 printf(", direction: %s", iio_ev_dir_text[dir]);
260
261 printf("\n");
262}
263
264int main(int argc, char **argv)
265{
266 struct iio_event_data event;
267 const char *device_name;
268 char *chrdev_name;
269 int ret;
270 int dev_num;
271 int fd, event_fd;
272
273 if (argc <= 1) {
274 fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
275 return -1;
276 }
277
278 device_name = argv[1];
279
280 dev_num = find_type_by_name(device_name, "iio:device");
281 if (dev_num >= 0) {
282 printf("Found IIO device with name %s with device number %d\n",
283 device_name, dev_num);
284 ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
285 if (ret < 0)
286 return -ENOMEM;
287 } else {
288 /*
289 * If we can't find an IIO device by name assume device_name is
290 * an IIO chrdev
291 */
292 chrdev_name = strdup(device_name);
293 if (!chrdev_name)
294 return -ENOMEM;
295 }
296
297 fd = open(chrdev_name, 0);
298 if (fd == -1) {
299 ret = -errno;
300 fprintf(stderr, "Failed to open %s\n", chrdev_name);
301 goto error_free_chrdev_name;
302 }
303
304 ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
305 if (ret == -1 || event_fd == -1) {
306 ret = -errno;
307 if (ret == -ENODEV)
308 fprintf(stderr,
309 "This device does not support events\n");
310 else
311 fprintf(stderr, "Failed to retrieve event fd\n");
312 if (close(fd) == -1)
313 perror("Failed to close character device file");
314
315 goto error_free_chrdev_name;
316 }
317
318 if (close(fd) == -1) {
319 ret = -errno;
320 goto error_free_chrdev_name;
321 }
322
323 while (true) {
324 ret = read(event_fd, &event, sizeof(event));
325 if (ret == -1) {
326 if (errno == EAGAIN) {
327 fprintf(stderr, "nothing available\n");
328 continue;
329 } else {
330 ret = -errno;
331 perror("Failed to read event from device");
332 break;
333 }
334 }
335
336 if (ret != sizeof(event)) {
337 fprintf(stderr, "Reading event failed!\n");
338 ret = -EIO;
339 break;
340 }
341
342 print_event(&event);
343 }
344
345 if (close(event_fd) == -1)
346 perror("Failed to close event file");
347
348error_free_chrdev_name:
349 free(chrdev_name);
350
351 return ret;
352}