1 /* Industrialio event test code.
3 * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
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.
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
15 * iio_event_monitor <device_name>
26 #include <sys/ioctl.h>
27 #include "iio_utils.h"
28 #include <linux/iio/events.h>
29 #include <linux/iio/types.h>
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",
38 [IIO_LIGHT] = "illuminance",
39 [IIO_INTENSITY] = "intensity",
40 [IIO_PROXIMITY] = "proximity",
42 [IIO_INCLI] = "incli",
45 [IIO_TIMESTAMP] = "timestamp",
46 [IIO_CAPACITANCE] = "capacitance",
47 [IIO_ALTVOLTAGE] = "altvoltage",
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",
59 [IIO_UVINDEX] = "uvindex",
62 static const char * const iio_ev_type_text[] = {
63 [IIO_EV_TYPE_THRESH] = "thresh",
64 [IIO_EV_TYPE_MAG] = "mag",
65 [IIO_EV_TYPE_ROC] = "roc",
66 [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
67 [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
68 [IIO_EV_TYPE_CHANGE] = "change",
71 static const char * const iio_ev_dir_text[] = {
72 [IIO_EV_DIR_EITHER] = "either",
73 [IIO_EV_DIR_RISING] = "rising",
74 [IIO_EV_DIR_FALLING] = "falling"
77 static const char * const iio_modifier_names[] = {
81 [IIO_MOD_X_AND_Y] = "x&y",
82 [IIO_MOD_X_AND_Z] = "x&z",
83 [IIO_MOD_Y_AND_Z] = "y&z",
84 [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z",
85 [IIO_MOD_X_OR_Y] = "x|y",
86 [IIO_MOD_X_OR_Z] = "x|z",
87 [IIO_MOD_Y_OR_Z] = "y|z",
88 [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z",
89 [IIO_MOD_LIGHT_BOTH] = "both",
90 [IIO_MOD_LIGHT_IR] = "ir",
91 [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
92 [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
93 [IIO_MOD_LIGHT_CLEAR] = "clear",
94 [IIO_MOD_LIGHT_RED] = "red",
95 [IIO_MOD_LIGHT_GREEN] = "green",
96 [IIO_MOD_LIGHT_BLUE] = "blue",
97 [IIO_MOD_LIGHT_UV] = "uv",
98 [IIO_MOD_QUATERNION] = "quaternion",
99 [IIO_MOD_TEMP_AMBIENT] = "ambient",
100 [IIO_MOD_TEMP_OBJECT] = "object",
101 [IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
102 [IIO_MOD_NORTH_TRUE] = "from_north_true",
103 [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
104 [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
105 [IIO_MOD_RUNNING] = "running",
106 [IIO_MOD_JOGGING] = "jogging",
107 [IIO_MOD_WALKING] = "walking",
108 [IIO_MOD_STILL] = "still",
109 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
112 [IIO_MOD_CO2] = "co2",
113 [IIO_MOD_VOC] = "voc",
116 static bool event_is_known(struct iio_event_data *event)
118 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
119 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
120 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
121 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
138 case IIO_CAPACITANCE:
142 case IIO_HUMIDITYRELATIVE:
148 case IIO_CONCENTRATION:
162 case IIO_MOD_X_AND_Y:
163 case IIO_MOD_X_AND_Z:
164 case IIO_MOD_Y_AND_Z:
165 case IIO_MOD_X_AND_Y_AND_Z:
169 case IIO_MOD_X_OR_Y_OR_Z:
170 case IIO_MOD_LIGHT_BOTH:
171 case IIO_MOD_LIGHT_IR:
172 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
173 case IIO_MOD_SUM_SQUARED_X_Y_Z:
174 case IIO_MOD_LIGHT_CLEAR:
175 case IIO_MOD_LIGHT_RED:
176 case IIO_MOD_LIGHT_GREEN:
177 case IIO_MOD_LIGHT_BLUE:
178 case IIO_MOD_LIGHT_UV:
179 case IIO_MOD_QUATERNION:
180 case IIO_MOD_TEMP_AMBIENT:
181 case IIO_MOD_TEMP_OBJECT:
182 case IIO_MOD_NORTH_MAGN:
183 case IIO_MOD_NORTH_TRUE:
184 case IIO_MOD_NORTH_MAGN_TILT_COMP:
185 case IIO_MOD_NORTH_TRUE_TILT_COMP:
186 case IIO_MOD_RUNNING:
187 case IIO_MOD_JOGGING:
188 case IIO_MOD_WALKING:
190 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
201 case IIO_EV_TYPE_THRESH:
202 case IIO_EV_TYPE_MAG:
203 case IIO_EV_TYPE_ROC:
204 case IIO_EV_TYPE_THRESH_ADAPTIVE:
205 case IIO_EV_TYPE_MAG_ADAPTIVE:
206 case IIO_EV_TYPE_CHANGE:
213 case IIO_EV_DIR_EITHER:
214 case IIO_EV_DIR_RISING:
215 case IIO_EV_DIR_FALLING:
216 case IIO_EV_DIR_NONE:
225 static void print_event(struct iio_event_data *event)
227 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
228 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
229 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
230 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
231 int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
232 int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
233 bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
235 if (!event_is_known(event)) {
236 fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
237 event->timestamp, event->id);
242 printf("Event: time: %lld, type: %s", event->timestamp,
243 iio_chan_type_name_spec[type]);
245 if (mod != IIO_NO_MOD)
246 printf("(%s)", iio_modifier_names[mod]);
249 printf(", channel: %d", chan);
250 if (diff && chan2 >= 0)
251 printf("-%d", chan2);
254 printf(", evtype: %s", iio_ev_type_text[ev_type]);
256 if (dir != IIO_EV_DIR_NONE)
257 printf(", direction: %s", iio_ev_dir_text[dir]);
262 int main(int argc, char **argv)
264 struct iio_event_data event;
265 const char *device_name;
272 fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
276 device_name = argv[1];
278 dev_num = find_type_by_name(device_name, "iio:device");
280 printf("Found IIO device with name %s with device number %d\n",
281 device_name, dev_num);
282 ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
287 * If we can't find an IIO device by name assume device_name is
290 chrdev_name = strdup(device_name);
295 fd = open(chrdev_name, 0);
298 fprintf(stderr, "Failed to open %s\n", chrdev_name);
299 goto error_free_chrdev_name;
302 ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
303 if (ret == -1 || event_fd == -1) {
307 "This device does not support events\n");
309 fprintf(stderr, "Failed to retrieve event fd\n");
311 perror("Failed to close character device file");
313 goto error_free_chrdev_name;
316 if (close(fd) == -1) {
318 goto error_free_chrdev_name;
322 ret = read(event_fd, &event, sizeof(event));
324 if (errno == EAGAIN) {
325 fprintf(stderr, "nothing available\n");
329 perror("Failed to read event from device");
334 if (ret != sizeof(event)) {
335 fprintf(stderr, "Reading event failed!\n");
343 if (close(event_fd) == -1)
344 perror("Failed to close event file");
346 error_free_chrdev_name: