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",
60 [IIO_GRAVITY
] = "gravity",
61 [IIO_POSITIONRELATIVE
] = "positionrelative",
62 [IIO_PHASE
] = "phase",
65 static const char * const iio_ev_type_text
[] = {
66 [IIO_EV_TYPE_THRESH
] = "thresh",
67 [IIO_EV_TYPE_MAG
] = "mag",
68 [IIO_EV_TYPE_ROC
] = "roc",
69 [IIO_EV_TYPE_THRESH_ADAPTIVE
] = "thresh_adaptive",
70 [IIO_EV_TYPE_MAG_ADAPTIVE
] = "mag_adaptive",
71 [IIO_EV_TYPE_CHANGE
] = "change",
74 static const char * const iio_ev_dir_text
[] = {
75 [IIO_EV_DIR_EITHER
] = "either",
76 [IIO_EV_DIR_RISING
] = "rising",
77 [IIO_EV_DIR_FALLING
] = "falling"
80 static const char * const iio_modifier_names
[] = {
84 [IIO_MOD_X_AND_Y
] = "x&y",
85 [IIO_MOD_X_AND_Z
] = "x&z",
86 [IIO_MOD_Y_AND_Z
] = "y&z",
87 [IIO_MOD_X_AND_Y_AND_Z
] = "x&y&z",
88 [IIO_MOD_X_OR_Y
] = "x|y",
89 [IIO_MOD_X_OR_Z
] = "x|z",
90 [IIO_MOD_Y_OR_Z
] = "y|z",
91 [IIO_MOD_X_OR_Y_OR_Z
] = "x|y|z",
92 [IIO_MOD_LIGHT_BOTH
] = "both",
93 [IIO_MOD_LIGHT_IR
] = "ir",
94 [IIO_MOD_ROOT_SUM_SQUARED_X_Y
] = "sqrt(x^2+y^2)",
95 [IIO_MOD_SUM_SQUARED_X_Y_Z
] = "x^2+y^2+z^2",
96 [IIO_MOD_LIGHT_CLEAR
] = "clear",
97 [IIO_MOD_LIGHT_RED
] = "red",
98 [IIO_MOD_LIGHT_GREEN
] = "green",
99 [IIO_MOD_LIGHT_BLUE
] = "blue",
100 [IIO_MOD_LIGHT_UV
] = "uv",
101 [IIO_MOD_LIGHT_DUV
] = "duv",
102 [IIO_MOD_QUATERNION
] = "quaternion",
103 [IIO_MOD_TEMP_AMBIENT
] = "ambient",
104 [IIO_MOD_TEMP_OBJECT
] = "object",
105 [IIO_MOD_NORTH_MAGN
] = "from_north_magnetic",
106 [IIO_MOD_NORTH_TRUE
] = "from_north_true",
107 [IIO_MOD_NORTH_MAGN_TILT_COMP
] = "from_north_magnetic_tilt_comp",
108 [IIO_MOD_NORTH_TRUE_TILT_COMP
] = "from_north_true_tilt_comp",
109 [IIO_MOD_RUNNING
] = "running",
110 [IIO_MOD_JOGGING
] = "jogging",
111 [IIO_MOD_WALKING
] = "walking",
112 [IIO_MOD_STILL
] = "still",
113 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z
] = "sqrt(x^2+y^2+z^2)",
116 [IIO_MOD_CO2
] = "co2",
117 [IIO_MOD_VOC
] = "voc",
120 static bool event_is_known(struct iio_event_data
*event
)
122 enum iio_chan_type type
= IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event
->id
);
123 enum iio_modifier mod
= IIO_EVENT_CODE_EXTRACT_MODIFIER(event
->id
);
124 enum iio_event_type ev_type
= IIO_EVENT_CODE_EXTRACT_TYPE(event
->id
);
125 enum iio_event_direction dir
= IIO_EVENT_CODE_EXTRACT_DIR(event
->id
);
142 case IIO_CAPACITANCE
:
146 case IIO_HUMIDITYRELATIVE
:
152 case IIO_CONCENTRATION
:
157 case IIO_POSITIONRELATIVE
:
169 case IIO_MOD_X_AND_Y
:
170 case IIO_MOD_X_AND_Z
:
171 case IIO_MOD_Y_AND_Z
:
172 case IIO_MOD_X_AND_Y_AND_Z
:
176 case IIO_MOD_X_OR_Y_OR_Z
:
177 case IIO_MOD_LIGHT_BOTH
:
178 case IIO_MOD_LIGHT_IR
:
179 case IIO_MOD_ROOT_SUM_SQUARED_X_Y
:
180 case IIO_MOD_SUM_SQUARED_X_Y_Z
:
181 case IIO_MOD_LIGHT_CLEAR
:
182 case IIO_MOD_LIGHT_RED
:
183 case IIO_MOD_LIGHT_GREEN
:
184 case IIO_MOD_LIGHT_BLUE
:
185 case IIO_MOD_LIGHT_UV
:
186 case IIO_MOD_LIGHT_DUV
:
187 case IIO_MOD_QUATERNION
:
188 case IIO_MOD_TEMP_AMBIENT
:
189 case IIO_MOD_TEMP_OBJECT
:
190 case IIO_MOD_NORTH_MAGN
:
191 case IIO_MOD_NORTH_TRUE
:
192 case IIO_MOD_NORTH_MAGN_TILT_COMP
:
193 case IIO_MOD_NORTH_TRUE_TILT_COMP
:
194 case IIO_MOD_RUNNING
:
195 case IIO_MOD_JOGGING
:
196 case IIO_MOD_WALKING
:
198 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z
:
209 case IIO_EV_TYPE_THRESH
:
210 case IIO_EV_TYPE_MAG
:
211 case IIO_EV_TYPE_ROC
:
212 case IIO_EV_TYPE_THRESH_ADAPTIVE
:
213 case IIO_EV_TYPE_MAG_ADAPTIVE
:
214 case IIO_EV_TYPE_CHANGE
:
221 case IIO_EV_DIR_EITHER
:
222 case IIO_EV_DIR_RISING
:
223 case IIO_EV_DIR_FALLING
:
224 case IIO_EV_DIR_NONE
:
233 static void print_event(struct iio_event_data
*event
)
235 enum iio_chan_type type
= IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event
->id
);
236 enum iio_modifier mod
= IIO_EVENT_CODE_EXTRACT_MODIFIER(event
->id
);
237 enum iio_event_type ev_type
= IIO_EVENT_CODE_EXTRACT_TYPE(event
->id
);
238 enum iio_event_direction dir
= IIO_EVENT_CODE_EXTRACT_DIR(event
->id
);
239 int chan
= IIO_EVENT_CODE_EXTRACT_CHAN(event
->id
);
240 int chan2
= IIO_EVENT_CODE_EXTRACT_CHAN2(event
->id
);
241 bool diff
= IIO_EVENT_CODE_EXTRACT_DIFF(event
->id
);
243 if (!event_is_known(event
)) {
244 fprintf(stderr
, "Unknown event: time: %lld, id: %llx\n",
245 event
->timestamp
, event
->id
);
250 printf("Event: time: %lld, type: %s", event
->timestamp
,
251 iio_chan_type_name_spec
[type
]);
253 if (mod
!= IIO_NO_MOD
)
254 printf("(%s)", iio_modifier_names
[mod
]);
257 printf(", channel: %d", chan
);
258 if (diff
&& chan2
>= 0)
259 printf("-%d", chan2
);
262 printf(", evtype: %s", iio_ev_type_text
[ev_type
]);
264 if (dir
!= IIO_EV_DIR_NONE
)
265 printf(", direction: %s", iio_ev_dir_text
[dir
]);
270 int main(int argc
, char **argv
)
272 struct iio_event_data event
;
273 const char *device_name
;
280 fprintf(stderr
, "Usage: %s <device_name>\n", argv
[0]);
284 device_name
= argv
[1];
286 dev_num
= find_type_by_name(device_name
, "iio:device");
288 printf("Found IIO device with name %s with device number %d\n",
289 device_name
, dev_num
);
290 ret
= asprintf(&chrdev_name
, "/dev/iio:device%d", dev_num
);
295 * If we can't find an IIO device by name assume device_name is
298 chrdev_name
= strdup(device_name
);
303 fd
= open(chrdev_name
, 0);
306 fprintf(stderr
, "Failed to open %s\n", chrdev_name
);
307 goto error_free_chrdev_name
;
310 ret
= ioctl(fd
, IIO_GET_EVENT_FD_IOCTL
, &event_fd
);
311 if (ret
== -1 || event_fd
== -1) {
315 "This device does not support events\n");
317 fprintf(stderr
, "Failed to retrieve event fd\n");
319 perror("Failed to close character device file");
321 goto error_free_chrdev_name
;
324 if (close(fd
) == -1) {
326 goto error_free_chrdev_name
;
330 ret
= read(event_fd
, &event
, sizeof(event
));
332 if (errno
== EAGAIN
) {
333 fprintf(stderr
, "nothing available\n");
337 perror("Failed to read event from device");
342 if (ret
!= sizeof(event
)) {
343 fprintf(stderr
, "Reading event failed!\n");
351 if (close(event_fd
) == -1)
352 perror("Failed to close event file");
354 error_free_chrdev_name
: