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Lars-Peter Clausen70421222012-02-13 10:25:34 +01001/* 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>
Lars-Peter Clausen70421222012-02-13 10:25:34 +010016 */
17
Lars-Peter Clausen70421222012-02-13 10:25:34 +010018#include <unistd.h>
Roberta Dobrescubdcb31d2015-02-26 10:49:24 +020019#include <stdlib.h>
Lars-Peter Clausen70421222012-02-13 10:25:34 +010020#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"
Jonathan Cameron06458e22012-04-25 15:54:58 +010028#include <linux/iio/events.h>
Roberta Dobrescu95763852015-02-26 10:49:23 +020029#include <linux/iio/types.h>
Lars-Peter Clausen70421222012-02-13 10:25:34 +010030
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",
Peter Meerwalda2160142012-06-15 19:25:26 +020047 [IIO_ALTVOLTAGE] = "altvoltage",
Peter Meerwald03782502014-12-06 06:00:00 +000048 [IIO_CCT] = "cct",
49 [IIO_PRESSURE] = "pressure",
50 [IIO_HUMIDITYRELATIVE] = "humidityrelative",
Daniel Baluta282a5662014-11-10 14:45:35 +020051 [IIO_ACTIVITY] = "activity",
52 [IIO_STEPS] = "steps",
Peter Meerwald30e83262015-06-20 23:52:31 +020053 [IIO_ENERGY] = "energy",
54 [IIO_DISTANCE] = "distance",
55 [IIO_VELOCITY] = "velocity",
Lars-Peter Clausen70421222012-02-13 10:25:34 +010056};
57
58static 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",
Irina Tirdea27be8422015-01-11 21:10:11 +020064 [IIO_EV_TYPE_CHANGE] = "change",
Lars-Peter Clausen70421222012-02-13 10:25:34 +010065};
66
67static 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
73static const char * const iio_modifier_names[] = {
74 [IIO_MOD_X] = "x",
75 [IIO_MOD_Y] = "y",
76 [IIO_MOD_Z] = "z",
Roberta Dobrescu0a6e2172014-10-22 16:50:17 +030077 [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",
Lars-Peter Clausen70421222012-02-13 10:25:34 +010085 [IIO_MOD_LIGHT_BOTH] = "both",
86 [IIO_MOD_LIGHT_IR] = "ir",
Peter Meerwaldda4db942012-07-01 12:20:13 +020087 [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",
Roberta Dobrescu0a6e2172014-10-22 16:50:17 +030093 [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",
Daniel Baluta282a5662014-11-10 14:45:35 +0200100 [IIO_MOD_RUNNING] = "running",
101 [IIO_MOD_JOGGING] = "jogging",
102 [IIO_MOD_WALKING] = "walking",
103 [IIO_MOD_STILL] = "still",
Peter Meerwald30e83262015-06-20 23:52:31 +0200104 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100105};
106
107static 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:
Peter Meerwalda2160142012-06-15 19:25:26 +0200130 case IIO_ALTVOLTAGE:
Peter Meerwald03782502014-12-06 06:00:00 +0000131 case IIO_CCT:
132 case IIO_PRESSURE:
133 case IIO_HUMIDITYRELATIVE:
Daniel Baluta282a5662014-11-10 14:45:35 +0200134 case IIO_ACTIVITY:
135 case IIO_STEPS:
Peter Meerwald30e83262015-06-20 23:52:31 +0200136 case IIO_ENERGY:
137 case IIO_DISTANCE:
138 case IIO_VELOCITY:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100139 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:
Roberta Dobrescu0a6e2172014-10-22 16:50:17 +0300149 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:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100157 case IIO_MOD_LIGHT_BOTH:
158 case IIO_MOD_LIGHT_IR:
Peter Meerwaldda4db942012-07-01 12:20:13 +0200159 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:
Roberta Dobrescu0a6e2172014-10-22 16:50:17 +0300165 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:
Daniel Baluta282a5662014-11-10 14:45:35 +0200172 case IIO_MOD_RUNNING:
173 case IIO_MOD_JOGGING:
174 case IIO_MOD_WALKING:
175 case IIO_MOD_STILL:
Peter Meerwald30e83262015-06-20 23:52:31 +0200176 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100177 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:
Irina Tirdea27be8422015-01-11 21:10:11 +0200188 case IIO_EV_TYPE_CHANGE:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100189 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:
Daniel Baluta282a5662014-11-10 14:45:35 +0200198 case IIO_EV_DIR_NONE:
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100199 break;
200 default:
201 return false;
202 }
203
204 return true;
205}
206
207static 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)) {
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300218 fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
219 event->timestamp, event->id);
Hartmut Knaack7663a4a2015-06-10 21:51:20 +0200220
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100221 return;
222 }
223
Hartmut Knaack916e89e2015-05-31 14:40:18 +0200224 printf("Event: time: %lld, type: %s", event->timestamp,
225 iio_chan_type_name_spec[type]);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100226
Hartmut Knaack916e89e2015-05-31 14:40:18 +0200227 if (mod != IIO_NO_MOD)
228 printf("(%s)", iio_modifier_names[mod]);
229
230 if (chan >= 0) {
231 printf(", channel: %d", chan);
232 if (diff && chan2 >= 0)
233 printf("-%d", chan2);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100234 }
235
Hartmut Knaack916e89e2015-05-31 14:40:18 +0200236 printf(", evtype: %s", iio_ev_type_text[ev_type]);
Daniel Baluta282a5662014-11-10 14:45:35 +0200237
238 if (dir != IIO_EV_DIR_NONE)
239 printf(", direction: %s", iio_ev_dir_text[dir]);
Hartmut Knaack7663a4a2015-06-10 21:51:20 +0200240
Daniel Baluta282a5662014-11-10 14:45:35 +0200241 printf("\n");
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100242}
243
244int 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) {
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300254 fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100255 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",
Hartmut Knaack7663a4a2015-06-10 21:51:20 +0200263 device_name, dev_num);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100264 ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
Cristina Opriceana37d38e22015-07-13 16:17:47 +0300265 if (ret < 0)
Hartmut Knaack0e799872015-05-31 14:40:17 +0200266 return -ENOMEM;
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100267 } else {
Hartmut Knaack7663a4a2015-06-10 21:51:20 +0200268 /*
269 * If we can't find an IIO device by name assume device_name is
270 * an IIO chrdev
271 */
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100272 chrdev_name = strdup(device_name);
Hartmut Knaacke9e45b42015-05-31 14:40:02 +0200273 if (!chrdev_name)
274 return -ENOMEM;
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100275 }
276
277 fd = open(chrdev_name, 0);
278 if (fd == -1) {
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100279 ret = -errno;
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300280 fprintf(stderr, "Failed to open %s\n", chrdev_name);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100281 goto error_free_chrdev_name;
282 }
283
284 ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100285 if (ret == -1 || event_fd == -1) {
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100286 ret = -errno;
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300287 fprintf(stderr, "Failed to retrieve event fd\n");
Hartmut Knaack5fdb8c62015-05-31 14:39:49 +0200288 if (close(fd) == -1)
289 perror("Failed to close character device file");
290
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100291 goto error_free_chrdev_name;
292 }
293
Hartmut Knaack963f54c2015-05-31 14:40:05 +0200294 if (close(fd) == -1) {
295 ret = -errno;
296 goto error_free_chrdev_name;
297 }
Hartmut Knaack5fdb8c62015-05-31 14:39:49 +0200298
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100299 while (true) {
300 ret = read(event_fd, &event, sizeof(event));
301 if (ret == -1) {
302 if (errno == EAGAIN) {
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300303 fprintf(stderr, "nothing available\n");
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100304 continue;
305 } else {
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100306 ret = -errno;
Hartmut Knaack2b6a6e62015-05-31 14:39:48 +0200307 perror("Failed to read event from device");
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100308 break;
309 }
310 }
311
Hartmut Knaack09a33f02015-06-10 21:51:19 +0200312 if (ret != sizeof(event)) {
Cristina Opriceanad9abc612015-07-17 18:43:42 +0300313 fprintf(stderr, "Reading event failed!\n");
Hartmut Knaack09a33f02015-06-10 21:51:19 +0200314 ret = -EIO;
315 break;
316 }
317
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100318 print_event(&event);
319 }
320
Hartmut Knaack963f54c2015-05-31 14:40:05 +0200321 if (close(event_fd) == -1)
322 perror("Failed to close event file");
323
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100324error_free_chrdev_name:
325 free(chrdev_name);
Hartmut Knaack0e799872015-05-31 14:40:17 +0200326
Lars-Peter Clausen70421222012-02-13 10:25:34 +0100327 return ret;
328}