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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 [IIO_POSITIONRELATIVE] = "positionrelative",
62 [IIO_PHASE] = "phase",
63 [IIO_MASSCONCENTRATION] = "massconcentration",
64};
65
66static const char * const iio_ev_type_text[] = {
67 [IIO_EV_TYPE_THRESH] = "thresh",
68 [IIO_EV_TYPE_MAG] = "mag",
69 [IIO_EV_TYPE_ROC] = "roc",
70 [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
71 [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
72 [IIO_EV_TYPE_CHANGE] = "change",
73};
74
75static const char * const iio_ev_dir_text[] = {
76 [IIO_EV_DIR_EITHER] = "either",
77 [IIO_EV_DIR_RISING] = "rising",
78 [IIO_EV_DIR_FALLING] = "falling"
79};
80
81static const char * const iio_modifier_names[] = {
82 [IIO_MOD_X] = "x",
83 [IIO_MOD_Y] = "y",
84 [IIO_MOD_Z] = "z",
85 [IIO_MOD_X_AND_Y] = "x&y",
86 [IIO_MOD_X_AND_Z] = "x&z",
87 [IIO_MOD_Y_AND_Z] = "y&z",
88 [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
89 [IIO_MOD_X_OR_Y] = "x|y",
90 [IIO_MOD_X_OR_Z] = "x|z",
91 [IIO_MOD_Y_OR_Z] = "y|z",
92 [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
93 [IIO_MOD_LIGHT_BOTH] = "both",
94 [IIO_MOD_LIGHT_IR] = "ir",
95 [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
96 [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
97 [IIO_MOD_LIGHT_CLEAR] = "clear",
98 [IIO_MOD_LIGHT_RED] = "red",
99 [IIO_MOD_LIGHT_GREEN] = "green",
100 [IIO_MOD_LIGHT_BLUE] = "blue",
101 [IIO_MOD_LIGHT_UV] = "uv",
102 [IIO_MOD_LIGHT_DUV] = "duv",
103 [IIO_MOD_QUATERNION] = "quaternion",
104 [IIO_MOD_TEMP_AMBIENT] = "ambient",
105 [IIO_MOD_TEMP_OBJECT] = "object",
106 [IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
107 [IIO_MOD_NORTH_TRUE] = "from_north_true",
108 [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
109 [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
110 [IIO_MOD_RUNNING] = "running",
111 [IIO_MOD_JOGGING] = "jogging",
112 [IIO_MOD_WALKING] = "walking",
113 [IIO_MOD_STILL] = "still",
114 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
115 [IIO_MOD_I] = "i",
116 [IIO_MOD_Q] = "q",
117 [IIO_MOD_CO2] = "co2",
118 [IIO_MOD_ETHANOL] = "ethanol",
119 [IIO_MOD_H2] = "h2",
120 [IIO_MOD_VOC] = "voc",
121 [IIO_MOD_PM1] = "pm1",
122 [IIO_MOD_PM2P5] = "pm2p5",
123 [IIO_MOD_PM4] = "pm4",
124 [IIO_MOD_PM10] = "pm10",
125};
126
127static bool event_is_known(struct iio_event_data *event)
128{
129 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
130 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
131 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
132 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
133
134 switch (type) {
135 case IIO_VOLTAGE:
136 case IIO_CURRENT:
137 case IIO_POWER:
138 case IIO_ACCEL:
139 case IIO_ANGL_VEL:
140 case IIO_MAGN:
141 case IIO_LIGHT:
142 case IIO_INTENSITY:
143 case IIO_PROXIMITY:
144 case IIO_TEMP:
145 case IIO_INCLI:
146 case IIO_ROT:
147 case IIO_ANGL:
148 case IIO_TIMESTAMP:
149 case IIO_CAPACITANCE:
150 case IIO_ALTVOLTAGE:
151 case IIO_CCT:
152 case IIO_PRESSURE:
153 case IIO_HUMIDITYRELATIVE:
154 case IIO_ACTIVITY:
155 case IIO_STEPS:
156 case IIO_ENERGY:
157 case IIO_DISTANCE:
158 case IIO_VELOCITY:
159 case IIO_CONCENTRATION:
160 case IIO_RESISTANCE:
161 case IIO_PH:
162 case IIO_UVINDEX:
163 case IIO_GRAVITY:
164 case IIO_POSITIONRELATIVE:
165 case IIO_PHASE:
166 case IIO_MASSCONCENTRATION:
167 break;
168 default:
169 return false;
170 }
171
172 switch (mod) {
173 case IIO_NO_MOD:
174 case IIO_MOD_X:
175 case IIO_MOD_Y:
176 case IIO_MOD_Z:
177 case IIO_MOD_X_AND_Y:
178 case IIO_MOD_X_AND_Z:
179 case IIO_MOD_Y_AND_Z:
180 case IIO_MOD_X_AND_Y_AND_Z:
181 case IIO_MOD_X_OR_Y:
182 case IIO_MOD_X_OR_Z:
183 case IIO_MOD_Y_OR_Z:
184 case IIO_MOD_X_OR_Y_OR_Z:
185 case IIO_MOD_LIGHT_BOTH:
186 case IIO_MOD_LIGHT_IR:
187 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
188 case IIO_MOD_SUM_SQUARED_X_Y_Z:
189 case IIO_MOD_LIGHT_CLEAR:
190 case IIO_MOD_LIGHT_RED:
191 case IIO_MOD_LIGHT_GREEN:
192 case IIO_MOD_LIGHT_BLUE:
193 case IIO_MOD_LIGHT_UV:
194 case IIO_MOD_LIGHT_DUV:
195 case IIO_MOD_QUATERNION:
196 case IIO_MOD_TEMP_AMBIENT:
197 case IIO_MOD_TEMP_OBJECT:
198 case IIO_MOD_NORTH_MAGN:
199 case IIO_MOD_NORTH_TRUE:
200 case IIO_MOD_NORTH_MAGN_TILT_COMP:
201 case IIO_MOD_NORTH_TRUE_TILT_COMP:
202 case IIO_MOD_RUNNING:
203 case IIO_MOD_JOGGING:
204 case IIO_MOD_WALKING:
205 case IIO_MOD_STILL:
206 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
207 case IIO_MOD_I:
208 case IIO_MOD_Q:
209 case IIO_MOD_CO2:
210 case IIO_MOD_ETHANOL:
211 case IIO_MOD_H2:
212 case IIO_MOD_VOC:
213 case IIO_MOD_PM1:
214 case IIO_MOD_PM2P5:
215 case IIO_MOD_PM4:
216 case IIO_MOD_PM10:
217 break;
218 default:
219 return false;
220 }
221
222 switch (ev_type) {
223 case IIO_EV_TYPE_THRESH:
224 case IIO_EV_TYPE_MAG:
225 case IIO_EV_TYPE_ROC:
226 case IIO_EV_TYPE_THRESH_ADAPTIVE:
227 case IIO_EV_TYPE_MAG_ADAPTIVE:
228 case IIO_EV_TYPE_CHANGE:
229 break;
230 default:
231 return false;
232 }
233
234 switch (dir) {
235 case IIO_EV_DIR_EITHER:
236 case IIO_EV_DIR_RISING:
237 case IIO_EV_DIR_FALLING:
238 case IIO_EV_DIR_NONE:
239 break;
240 default:
241 return false;
242 }
243
244 return true;
245}
246
247static void print_event(struct iio_event_data *event)
248{
249 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
250 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
251 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
252 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
253 int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
254 int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
255 bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
256
257 if (!event_is_known(event)) {
258 fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
259 event->timestamp, event->id);
260
261 return;
262 }
263
264 printf("Event: time: %lld, type: %s", event->timestamp,
265 iio_chan_type_name_spec[type]);
266
267 if (mod != IIO_NO_MOD)
268 printf("(%s)", iio_modifier_names[mod]);
269
270 if (chan >= 0) {
271 printf(", channel: %d", chan);
272 if (diff && chan2 >= 0)
273 printf("-%d", chan2);
274 }
275
276 printf(", evtype: %s", iio_ev_type_text[ev_type]);
277
278 if (dir != IIO_EV_DIR_NONE)
279 printf(", direction: %s", iio_ev_dir_text[dir]);
280
281 printf("\n");
282}
283
284int main(int argc, char **argv)
285{
286 struct iio_event_data event;
287 const char *device_name;
288 char *chrdev_name;
289 int ret;
290 int dev_num;
291 int fd, event_fd;
292
293 if (argc <= 1) {
294 fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
295 return -1;
296 }
297
298 device_name = argv[1];
299
300 dev_num = find_type_by_name(device_name, "iio:device");
301 if (dev_num >= 0) {
302 printf("Found IIO device with name %s with device number %d\n",
303 device_name, dev_num);
304 ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
305 if (ret < 0)
306 return -ENOMEM;
307 } else {
308
309
310
311
312 chrdev_name = strdup(device_name);
313 if (!chrdev_name)
314 return -ENOMEM;
315 }
316
317 fd = open(chrdev_name, 0);
318 if (fd == -1) {
319 ret = -errno;
320 fprintf(stderr, "Failed to open %s\n", chrdev_name);
321 goto error_free_chrdev_name;
322 }
323
324 ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
325 if (ret == -1 || event_fd == -1) {
326 ret = -errno;
327 if (ret == -ENODEV)
328 fprintf(stderr,
329 "This device does not support events\n");
330 else
331 fprintf(stderr, "Failed to retrieve event fd\n");
332 if (close(fd) == -1)
333 perror("Failed to close character device file");
334
335 goto error_free_chrdev_name;
336 }
337
338 if (close(fd) == -1) {
339 ret = -errno;
340 goto error_free_chrdev_name;
341 }
342
343 while (true) {
344 ret = read(event_fd, &event, sizeof(event));
345 if (ret == -1) {
346 if (errno == EAGAIN) {
347 fprintf(stderr, "nothing available\n");
348 continue;
349 } else {
350 ret = -errno;
351 perror("Failed to read event from device");
352 break;
353 }
354 }
355
356 if (ret != sizeof(event)) {
357 fprintf(stderr, "Reading event failed!\n");
358 ret = -EIO;
359 break;
360 }
361
362 print_event(&event);
363 }
364
365 if (close(event_fd) == -1)
366 perror("Failed to close event file");
367
368error_free_chrdev_name:
369 free(chrdev_name);
370
371 return ret;
372}
373
