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", | |
7042122f LPC |
56 | }; |
57 | ||
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", | |
27be8423 | 64 | [IIO_EV_TYPE_CHANGE] = "change", |
7042122f LPC |
65 | }; |
66 | ||
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" | |
71 | }; | |
72 | ||
73 | static const char * const iio_modifier_names[] = { | |
74 | [IIO_MOD_X] = "x", | |
75 | [IIO_MOD_Y] = "y", | |
76 | [IIO_MOD_Z] = "z", | |
0a6e2170 RD |
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", | |
7042122f LPC |
85 | [IIO_MOD_LIGHT_BOTH] = "both", |
86 | [IIO_MOD_LIGHT_IR] = "ir", | |
da4db940 PM |
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", | |
0a6e2170 RD |
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", | |
282a5663 DB |
100 | [IIO_MOD_RUNNING] = "running", |
101 | [IIO_MOD_JOGGING] = "jogging", | |
102 | [IIO_MOD_WALKING] = "walking", | |
103 | [IIO_MOD_STILL] = "still", | |
30e83267 | 104 | [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)", |
7042122f LPC |
105 | }; |
106 | ||
107 | static bool event_is_known(struct iio_event_data *event) | |
108 | { | |
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); | |
113 | ||
114 | switch (type) { | |
115 | case IIO_VOLTAGE: | |
116 | case IIO_CURRENT: | |
117 | case IIO_POWER: | |
118 | case IIO_ACCEL: | |
119 | case IIO_ANGL_VEL: | |
120 | case IIO_MAGN: | |
121 | case IIO_LIGHT: | |
122 | case IIO_INTENSITY: | |
123 | case IIO_PROXIMITY: | |
124 | case IIO_TEMP: | |
125 | case IIO_INCLI: | |
126 | case IIO_ROT: | |
127 | case IIO_ANGL: | |
128 | case IIO_TIMESTAMP: | |
129 | case IIO_CAPACITANCE: | |
a2160146 | 130 | case IIO_ALTVOLTAGE: |
0378250b PM |
131 | case IIO_CCT: |
132 | case IIO_PRESSURE: | |
133 | case IIO_HUMIDITYRELATIVE: | |
282a5663 DB |
134 | case IIO_ACTIVITY: |
135 | case IIO_STEPS: | |
30e83267 PM |
136 | case IIO_ENERGY: |
137 | case IIO_DISTANCE: | |
138 | case IIO_VELOCITY: | |
7042122f LPC |
139 | break; |
140 | default: | |
141 | return false; | |
142 | } | |
143 | ||
144 | switch (mod) { | |
145 | case IIO_NO_MOD: | |
146 | case IIO_MOD_X: | |
147 | case IIO_MOD_Y: | |
148 | case IIO_MOD_Z: | |
0a6e2170 RD |
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: | |
153 | case IIO_MOD_X_OR_Y: | |
154 | case IIO_MOD_X_OR_Z: | |
155 | case IIO_MOD_Y_OR_Z: | |
156 | case IIO_MOD_X_OR_Y_OR_Z: | |
7042122f LPC |
157 | case IIO_MOD_LIGHT_BOTH: |
158 | case IIO_MOD_LIGHT_IR: | |
da4db940 PM |
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: | |
0a6e2170 RD |
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: | |
282a5663 DB |
172 | case IIO_MOD_RUNNING: |
173 | case IIO_MOD_JOGGING: | |
174 | case IIO_MOD_WALKING: | |
175 | case IIO_MOD_STILL: | |
30e83267 | 176 | case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z: |
7042122f LPC |
177 | break; |
178 | default: | |
179 | return false; | |
180 | } | |
181 | ||
182 | switch (ev_type) { | |
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: | |
27be8423 | 188 | case IIO_EV_TYPE_CHANGE: |
7042122f LPC |
189 | break; |
190 | default: | |
191 | return false; | |
192 | } | |
193 | ||
194 | switch (dir) { | |
195 | case IIO_EV_DIR_EITHER: | |
196 | case IIO_EV_DIR_RISING: | |
197 | case IIO_EV_DIR_FALLING: | |
282a5663 | 198 | case IIO_EV_DIR_NONE: |
7042122f LPC |
199 | break; |
200 | default: | |
201 | return false; | |
202 | } | |
203 | ||
204 | return true; | |
205 | } | |
206 | ||
207 | static void print_event(struct iio_event_data *event) | |
208 | { | |
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); | |
216 | ||
217 | if (!event_is_known(event)) { | |
d9abc615 CO |
218 | fprintf(stderr, "Unknown event: time: %lld, id: %llx\n", |
219 | event->timestamp, event->id); | |
7663a4aa | 220 | |
7042122f LPC |
221 | return; |
222 | } | |
223 | ||
916e89e4 HK |
224 | printf("Event: time: %lld, type: %s", event->timestamp, |
225 | iio_chan_type_name_spec[type]); | |
7042122f | 226 | |
916e89e4 HK |
227 | if (mod != IIO_NO_MOD) |
228 | printf("(%s)", iio_modifier_names[mod]); | |
7042122f | 229 | |
916e89e4 HK |
230 | if (chan >= 0) { |
231 | printf(", channel: %d", chan); | |
232 | if (diff && chan2 >= 0) | |
233 | printf("-%d", chan2); | |
234 | } | |
7042122f | 235 | |
916e89e4 | 236 | printf(", evtype: %s", iio_ev_type_text[ev_type]); |
282a5663 DB |
237 | |
238 | if (dir != IIO_EV_DIR_NONE) | |
239 | printf(", direction: %s", iio_ev_dir_text[dir]); | |
7663a4aa | 240 | |
282a5663 | 241 | printf("\n"); |
7042122f LPC |
242 | } |
243 | ||
244 | int main(int argc, char **argv) | |
245 | { | |
246 | struct iio_event_data event; | |
247 | const char *device_name; | |
248 | char *chrdev_name; | |
249 | int ret; | |
250 | int dev_num; | |
251 | int fd, event_fd; | |
252 | ||
253 | if (argc <= 1) { | |
d9abc615 | 254 | fprintf(stderr, "Usage: %s <device_name>\n", argv[0]); |
7042122f LPC |
255 | return -1; |
256 | } | |
257 | ||
258 | device_name = argv[1]; | |
259 | ||
260 | dev_num = find_type_by_name(device_name, "iio:device"); | |
261 | if (dev_num >= 0) { | |
262 | printf("Found IIO device with name %s with device number %d\n", | |
7663a4aa | 263 | device_name, dev_num); |
7042122f | 264 | ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num); |
37d38e2b | 265 | if (ret < 0) |
0e799878 | 266 | return -ENOMEM; |
7042122f | 267 | } else { |
7663a4aa HK |
268 | /* |
269 | * If we can't find an IIO device by name assume device_name is | |
270 | * an IIO chrdev | |
271 | */ | |
7042122f | 272 | chrdev_name = strdup(device_name); |
e9e45b43 HK |
273 | if (!chrdev_name) |
274 | return -ENOMEM; | |
7042122f LPC |
275 | } |
276 | ||
277 | fd = open(chrdev_name, 0); | |
278 | if (fd == -1) { | |
7042122f | 279 | ret = -errno; |
d9abc615 | 280 | fprintf(stderr, "Failed to open %s\n", chrdev_name); |
7042122f LPC |
281 | goto error_free_chrdev_name; |
282 | } | |
283 | ||
284 | ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); | |
7042122f | 285 | if (ret == -1 || event_fd == -1) { |
7042122f | 286 | ret = -errno; |
672f93b6 LW |
287 | if (ret == -ENODEV) |
288 | fprintf(stderr, | |
289 | "This device does not support events\n"); | |
290 | else | |
291 | fprintf(stderr, "Failed to retrieve event fd\n"); | |
5fdb8c61 HK |
292 | if (close(fd) == -1) |
293 | perror("Failed to close character device file"); | |
294 | ||
7042122f LPC |
295 | goto error_free_chrdev_name; |
296 | } | |
297 | ||
963f54ce HK |
298 | if (close(fd) == -1) { |
299 | ret = -errno; | |
300 | goto error_free_chrdev_name; | |
301 | } | |
5fdb8c61 | 302 | |
7042122f LPC |
303 | while (true) { |
304 | ret = read(event_fd, &event, sizeof(event)); | |
305 | if (ret == -1) { | |
306 | if (errno == EAGAIN) { | |
d9abc615 | 307 | fprintf(stderr, "nothing available\n"); |
7042122f LPC |
308 | continue; |
309 | } else { | |
7042122f | 310 | ret = -errno; |
2b6a6e67 | 311 | perror("Failed to read event from device"); |
7042122f LPC |
312 | break; |
313 | } | |
314 | } | |
315 | ||
09a33f05 | 316 | if (ret != sizeof(event)) { |
d9abc615 | 317 | fprintf(stderr, "Reading event failed!\n"); |
09a33f05 HK |
318 | ret = -EIO; |
319 | break; | |
320 | } | |
321 | ||
7042122f LPC |
322 | print_event(&event); |
323 | } | |
324 | ||
963f54ce HK |
325 | if (close(event_fd) == -1) |
326 | perror("Failed to close event file"); | |
327 | ||
7042122f LPC |
328 | error_free_chrdev_name: |
329 | free(chrdev_name); | |
0e799878 | 330 | |
7042122f LPC |
331 | return ret; |
332 | } |