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Commit | Line | Data |
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7042122f LPC |
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> | |
7042122f LPC |
16 | */ |
17 | ||
7042122f | 18 | #include <unistd.h> |
bdcb31d0 | 19 | #include <stdlib.h> |
7042122f LPC |
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" | |
06458e27 | 28 | #include <linux/iio/events.h> |
95763859 | 29 | #include <linux/iio/types.h> |
7042122f LPC |
30 | |
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", | |
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", | |
a2160146 | 47 | [IIO_ALTVOLTAGE] = "altvoltage", |
0378250b PM |
48 | [IIO_CCT] = "cct", |
49 | [IIO_PRESSURE] = "pressure", | |
50 | [IIO_HUMIDITYRELATIVE] = "humidityrelative", | |
282a5663 DB |
51 | [IIO_ACTIVITY] = "activity", |
52 | [IIO_STEPS] = "steps", | |
30e83267 PM |
53 | [IIO_ENERGY] = "energy", |
54 | [IIO_DISTANCE] = "distance", | |
55 | [IIO_VELOCITY] = "velocity", | |
6ad515c6 PMS |
56 | [IIO_CONCENTRATION] = "concentration", |
57 | [IIO_RESISTANCE] = "resistance", | |
58 | [IIO_PH] = "ph", | |
d409404c | 59 | [IIO_UVINDEX] = "uvindex", |
571299d0 | 60 | [IIO_GRAVITY] = "gravity", |
7042122f LPC |
61 | }; |
62 | ||
63 | static 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", | |
27be8423 | 69 | [IIO_EV_TYPE_CHANGE] = "change", |
7042122f LPC |
70 | }; |
71 | ||
72 | static 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 | ||
78 | static const char * const iio_modifier_names[] = { | |
79 | [IIO_MOD_X] = "x", | |
80 | [IIO_MOD_Y] = "y", | |
81 | [IIO_MOD_Z] = "z", | |
0a6e2170 RD |
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", | |
7042122f LPC |
90 | [IIO_MOD_LIGHT_BOTH] = "both", |
91 | [IIO_MOD_LIGHT_IR] = "ir", | |
da4db940 PM |
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", | |
2c5ff1f9 | 98 | [IIO_MOD_LIGHT_UV] = "uv", |
0a6e2170 RD |
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", | |
282a5663 DB |
106 | [IIO_MOD_RUNNING] = "running", |
107 | [IIO_MOD_JOGGING] = "jogging", | |
108 | [IIO_MOD_WALKING] = "walking", | |
109 | [IIO_MOD_STILL] = "still", | |
30e83267 | 110 | [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)", |
6ad515c6 PMS |
111 | [IIO_MOD_I] = "i", |
112 | [IIO_MOD_Q] = "q", | |
113 | [IIO_MOD_CO2] = "co2", | |
114 | [IIO_MOD_VOC] = "voc", | |
7042122f LPC |
115 | }; |
116 | ||
117 | static 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: | |
a2160146 | 140 | case IIO_ALTVOLTAGE: |
0378250b PM |
141 | case IIO_CCT: |
142 | case IIO_PRESSURE: | |
143 | case IIO_HUMIDITYRELATIVE: | |
282a5663 DB |
144 | case IIO_ACTIVITY: |
145 | case IIO_STEPS: | |
30e83267 PM |
146 | case IIO_ENERGY: |
147 | case IIO_DISTANCE: | |
148 | case IIO_VELOCITY: | |
6ad515c6 PMS |
149 | case IIO_CONCENTRATION: |
150 | case IIO_RESISTANCE: | |
151 | case IIO_PH: | |
d409404c | 152 | case IIO_UVINDEX: |
571299d0 | 153 | case IIO_GRAVITY: |
7042122f LPC |
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: | |
0a6e2170 RD |
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: | |
7042122f LPC |
172 | case IIO_MOD_LIGHT_BOTH: |
173 | case IIO_MOD_LIGHT_IR: | |
da4db940 PM |
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: | |
2c5ff1f9 | 180 | case IIO_MOD_LIGHT_UV: |
0a6e2170 RD |
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: | |
282a5663 DB |
188 | case IIO_MOD_RUNNING: |
189 | case IIO_MOD_JOGGING: | |
190 | case IIO_MOD_WALKING: | |
191 | case IIO_MOD_STILL: | |
30e83267 | 192 | case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z: |
6ad515c6 PMS |
193 | case IIO_MOD_I: |
194 | case IIO_MOD_Q: | |
195 | case IIO_MOD_CO2: | |
196 | case IIO_MOD_VOC: | |
7042122f LPC |
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: | |
27be8423 | 208 | case IIO_EV_TYPE_CHANGE: |
7042122f LPC |
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: | |
282a5663 | 218 | case IIO_EV_DIR_NONE: |
7042122f LPC |
219 | break; |
220 | default: | |
221 | return false; | |
222 | } | |
223 | ||
224 | return true; | |
225 | } | |
226 | ||
227 | static 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)) { | |
d9abc615 CO |
238 | fprintf(stderr, "Unknown event: time: %lld, id: %llx\n", |
239 | event->timestamp, event->id); | |
7663a4aa | 240 | |
7042122f LPC |
241 | return; |
242 | } | |
243 | ||
916e89e4 HK |
244 | printf("Event: time: %lld, type: %s", event->timestamp, |
245 | iio_chan_type_name_spec[type]); | |
7042122f | 246 | |
916e89e4 HK |
247 | if (mod != IIO_NO_MOD) |
248 | printf("(%s)", iio_modifier_names[mod]); | |
7042122f | 249 | |
916e89e4 HK |
250 | if (chan >= 0) { |
251 | printf(", channel: %d", chan); | |
252 | if (diff && chan2 >= 0) | |
253 | printf("-%d", chan2); | |
254 | } | |
7042122f | 255 | |
916e89e4 | 256 | printf(", evtype: %s", iio_ev_type_text[ev_type]); |
282a5663 DB |
257 | |
258 | if (dir != IIO_EV_DIR_NONE) | |
259 | printf(", direction: %s", iio_ev_dir_text[dir]); | |
7663a4aa | 260 | |
282a5663 | 261 | printf("\n"); |
7042122f LPC |
262 | } |
263 | ||
264 | int 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) { | |
d9abc615 | 274 | fprintf(stderr, "Usage: %s <device_name>\n", argv[0]); |
7042122f LPC |
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", | |
7663a4aa | 283 | device_name, dev_num); |
7042122f | 284 | ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num); |
37d38e2b | 285 | if (ret < 0) |
0e799878 | 286 | return -ENOMEM; |
7042122f | 287 | } else { |
7663a4aa HK |
288 | /* |
289 | * If we can't find an IIO device by name assume device_name is | |
290 | * an IIO chrdev | |
291 | */ | |
7042122f | 292 | chrdev_name = strdup(device_name); |
e9e45b43 HK |
293 | if (!chrdev_name) |
294 | return -ENOMEM; | |
7042122f LPC |
295 | } |
296 | ||
297 | fd = open(chrdev_name, 0); | |
298 | if (fd == -1) { | |
7042122f | 299 | ret = -errno; |
d9abc615 | 300 | fprintf(stderr, "Failed to open %s\n", chrdev_name); |
7042122f LPC |
301 | goto error_free_chrdev_name; |
302 | } | |
303 | ||
304 | ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); | |
7042122f | 305 | if (ret == -1 || event_fd == -1) { |
7042122f | 306 | ret = -errno; |
672f93b6 LW |
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"); | |
5fdb8c61 HK |
312 | if (close(fd) == -1) |
313 | perror("Failed to close character device file"); | |
314 | ||
7042122f LPC |
315 | goto error_free_chrdev_name; |
316 | } | |
317 | ||
963f54ce HK |
318 | if (close(fd) == -1) { |
319 | ret = -errno; | |
320 | goto error_free_chrdev_name; | |
321 | } | |
5fdb8c61 | 322 | |
7042122f LPC |
323 | while (true) { |
324 | ret = read(event_fd, &event, sizeof(event)); | |
325 | if (ret == -1) { | |
326 | if (errno == EAGAIN) { | |
d9abc615 | 327 | fprintf(stderr, "nothing available\n"); |
7042122f LPC |
328 | continue; |
329 | } else { | |
7042122f | 330 | ret = -errno; |
2b6a6e67 | 331 | perror("Failed to read event from device"); |
7042122f LPC |
332 | break; |
333 | } | |
334 | } | |
335 | ||
09a33f05 | 336 | if (ret != sizeof(event)) { |
d9abc615 | 337 | fprintf(stderr, "Reading event failed!\n"); |
09a33f05 HK |
338 | ret = -EIO; |
339 | break; | |
340 | } | |
341 | ||
7042122f LPC |
342 | print_event(&event); |
343 | } | |
344 | ||
963f54ce HK |
345 | if (close(event_fd) == -1) |
346 | perror("Failed to close event file"); | |
347 | ||
7042122f LPC |
348 | error_free_chrdev_name: |
349 | free(chrdev_name); | |
0e799878 | 350 | |
7042122f LPC |
351 | return ret; |
352 | } |