1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Industrialio event test code.
4 * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de>
6 * This program is primarily intended as an example application.
7 * Reads the current buffer setup from sysfs and starts a short capture
8 * from the specified device, pretty printing the result after appropriate
12 * iio_event_monitor <device_name>
23 #include <sys/ioctl.h>
24 #include "iio_utils.h"
25 #include <linux/iio/events.h>
26 #include <linux/iio/types.h>
28 static const char * const iio_chan_type_name_spec[] = {
29 [IIO_VOLTAGE] = "voltage",
30 [IIO_CURRENT] = "current",
31 [IIO_POWER] = "power",
32 [IIO_ACCEL] = "accel",
33 [IIO_ANGL_VEL] = "anglvel",
35 [IIO_LIGHT] = "illuminance",
36 [IIO_INTENSITY] = "intensity",
37 [IIO_PROXIMITY] = "proximity",
39 [IIO_INCLI] = "incli",
42 [IIO_TIMESTAMP] = "timestamp",
43 [IIO_CAPACITANCE] = "capacitance",
44 [IIO_ALTVOLTAGE] = "altvoltage",
46 [IIO_PRESSURE] = "pressure",
47 [IIO_HUMIDITYRELATIVE] = "humidityrelative",
48 [IIO_ACTIVITY] = "activity",
49 [IIO_STEPS] = "steps",
50 [IIO_ENERGY] = "energy",
51 [IIO_DISTANCE] = "distance",
52 [IIO_VELOCITY] = "velocity",
53 [IIO_CONCENTRATION] = "concentration",
54 [IIO_RESISTANCE] = "resistance",
56 [IIO_UVINDEX] = "uvindex",
57 [IIO_GRAVITY] = "gravity",
58 [IIO_POSITIONRELATIVE] = "positionrelative",
59 [IIO_PHASE] = "phase",
60 [IIO_MASSCONCENTRATION] = "massconcentration",
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",
69 [IIO_EV_TYPE_CHANGE] = "change",
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"
78 static const char * const iio_modifier_names[] = {
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",
90 [IIO_MOD_LIGHT_BOTH] = "both",
91 [IIO_MOD_LIGHT_IR] = "ir",
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",
98 [IIO_MOD_LIGHT_UV] = "uv",
99 [IIO_MOD_LIGHT_DUV] = "duv",
100 [IIO_MOD_QUATERNION] = "quaternion",
101 [IIO_MOD_TEMP_AMBIENT] = "ambient",
102 [IIO_MOD_TEMP_OBJECT] = "object",
103 [IIO_MOD_NORTH_MAGN] = "from_north_magnetic",
104 [IIO_MOD_NORTH_TRUE] = "from_north_true",
105 [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp",
106 [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp",
107 [IIO_MOD_RUNNING] = "running",
108 [IIO_MOD_JOGGING] = "jogging",
109 [IIO_MOD_WALKING] = "walking",
110 [IIO_MOD_STILL] = "still",
111 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
114 [IIO_MOD_CO2] = "co2",
115 [IIO_MOD_ETHANOL] = "ethanol",
117 [IIO_MOD_VOC] = "voc",
118 [IIO_MOD_PM1] = "pm1",
119 [IIO_MOD_PM2P5] = "pm2p5",
120 [IIO_MOD_PM4] = "pm4",
121 [IIO_MOD_PM10] = "pm10",
124 static bool event_is_known(struct iio_event_data *event)
126 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
127 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
128 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
129 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
146 case IIO_CAPACITANCE:
150 case IIO_HUMIDITYRELATIVE:
156 case IIO_CONCENTRATION:
161 case IIO_POSITIONRELATIVE:
163 case IIO_MASSCONCENTRATION:
174 case IIO_MOD_X_AND_Y:
175 case IIO_MOD_X_AND_Z:
176 case IIO_MOD_Y_AND_Z:
177 case IIO_MOD_X_AND_Y_AND_Z:
181 case IIO_MOD_X_OR_Y_OR_Z:
182 case IIO_MOD_LIGHT_BOTH:
183 case IIO_MOD_LIGHT_IR:
184 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
185 case IIO_MOD_SUM_SQUARED_X_Y_Z:
186 case IIO_MOD_LIGHT_CLEAR:
187 case IIO_MOD_LIGHT_RED:
188 case IIO_MOD_LIGHT_GREEN:
189 case IIO_MOD_LIGHT_BLUE:
190 case IIO_MOD_LIGHT_UV:
191 case IIO_MOD_LIGHT_DUV:
192 case IIO_MOD_QUATERNION:
193 case IIO_MOD_TEMP_AMBIENT:
194 case IIO_MOD_TEMP_OBJECT:
195 case IIO_MOD_NORTH_MAGN:
196 case IIO_MOD_NORTH_TRUE:
197 case IIO_MOD_NORTH_MAGN_TILT_COMP:
198 case IIO_MOD_NORTH_TRUE_TILT_COMP:
199 case IIO_MOD_RUNNING:
200 case IIO_MOD_JOGGING:
201 case IIO_MOD_WALKING:
203 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z:
207 case IIO_MOD_ETHANOL:
220 case IIO_EV_TYPE_THRESH:
221 case IIO_EV_TYPE_MAG:
222 case IIO_EV_TYPE_ROC:
223 case IIO_EV_TYPE_THRESH_ADAPTIVE:
224 case IIO_EV_TYPE_MAG_ADAPTIVE:
225 case IIO_EV_TYPE_CHANGE:
232 case IIO_EV_DIR_EITHER:
233 case IIO_EV_DIR_RISING:
234 case IIO_EV_DIR_FALLING:
235 case IIO_EV_DIR_NONE:
244 static void print_event(struct iio_event_data *event)
246 enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
247 enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
248 enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
249 enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id);
250 int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
251 int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
252 bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
254 if (!event_is_known(event)) {
255 fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
256 event->timestamp, event->id);
261 printf("Event: time: %lld, type: %s", event->timestamp,
262 iio_chan_type_name_spec[type]);
264 if (mod != IIO_NO_MOD)
265 printf("(%s)", iio_modifier_names[mod]);
268 printf(", channel: %d", chan);
269 if (diff && chan2 >= 0)
270 printf("-%d", chan2);
273 printf(", evtype: %s", iio_ev_type_text[ev_type]);
275 if (dir != IIO_EV_DIR_NONE)
276 printf(", direction: %s", iio_ev_dir_text[dir]);
281 int main(int argc, char **argv)
283 struct iio_event_data event;
284 const char *device_name;
291 fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
295 device_name = argv[1];
297 dev_num = find_type_by_name(device_name, "iio:device");
299 printf("Found IIO device with name %s with device number %d\n",
300 device_name, dev_num);
301 ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
306 * If we can't find an IIO device by name assume device_name is
309 chrdev_name = strdup(device_name);
314 fd = open(chrdev_name, 0);
317 fprintf(stderr, "Failed to open %s\n", chrdev_name);
318 goto error_free_chrdev_name;
321 ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
322 if (ret == -1 || event_fd == -1) {
326 "This device does not support events\n");
328 fprintf(stderr, "Failed to retrieve event fd\n");
330 perror("Failed to close character device file");
332 goto error_free_chrdev_name;
335 if (close(fd) == -1) {
337 goto error_free_chrdev_name;
341 ret = read(event_fd, &event, sizeof(event));
343 if (errno == EAGAIN) {
344 fprintf(stderr, "nothing available\n");
348 perror("Failed to read event from device");
353 if (ret != sizeof(event)) {
354 fprintf(stderr, "Reading event failed!\n");
362 if (close(event_fd) == -1)
363 perror("Failed to close event file");
365 error_free_chrdev_name: