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",
63 [IIO_MASSCONCENTRATION
] = "massconcentration",
66 static const char * const iio_ev_type_text
[] = {
67 [IIO_EV_TYPE_THRESH
] = "thresh",
68 [IIO_EV_TYPE_MAG
] = "mag",
69 [IIO_EV_TYPE_ROC
] = "roc",
70 [IIO_EV_TYPE_THRESH_ADAPTIVE
] = "thresh_adaptive",
71 [IIO_EV_TYPE_MAG_ADAPTIVE
] = "mag_adaptive",
72 [IIO_EV_TYPE_CHANGE
] = "change",
75 static const char * const iio_ev_dir_text
[] = {
76 [IIO_EV_DIR_EITHER
] = "either",
77 [IIO_EV_DIR_RISING
] = "rising",
78 [IIO_EV_DIR_FALLING
] = "falling"
81 static const char * const iio_modifier_names
[] = {
85 [IIO_MOD_X_AND_Y
] = "x&y",
86 [IIO_MOD_X_AND_Z
] = "x&z",
87 [IIO_MOD_Y_AND_Z
] = "y&z",
88 [IIO_MOD_X_AND_Y_AND_Z
] = "x&y&z",
89 [IIO_MOD_X_OR_Y
] = "x|y",
90 [IIO_MOD_X_OR_Z
] = "x|z",
91 [IIO_MOD_Y_OR_Z
] = "y|z",
92 [IIO_MOD_X_OR_Y_OR_Z
] = "x|y|z",
93 [IIO_MOD_LIGHT_BOTH
] = "both",
94 [IIO_MOD_LIGHT_IR
] = "ir",
95 [IIO_MOD_ROOT_SUM_SQUARED_X_Y
] = "sqrt(x^2+y^2)",
96 [IIO_MOD_SUM_SQUARED_X_Y_Z
] = "x^2+y^2+z^2",
97 [IIO_MOD_LIGHT_CLEAR
] = "clear",
98 [IIO_MOD_LIGHT_RED
] = "red",
99 [IIO_MOD_LIGHT_GREEN
] = "green",
100 [IIO_MOD_LIGHT_BLUE
] = "blue",
101 [IIO_MOD_LIGHT_UV
] = "uv",
102 [IIO_MOD_LIGHT_DUV
] = "duv",
103 [IIO_MOD_QUATERNION
] = "quaternion",
104 [IIO_MOD_TEMP_AMBIENT
] = "ambient",
105 [IIO_MOD_TEMP_OBJECT
] = "object",
106 [IIO_MOD_NORTH_MAGN
] = "from_north_magnetic",
107 [IIO_MOD_NORTH_TRUE
] = "from_north_true",
108 [IIO_MOD_NORTH_MAGN_TILT_COMP
] = "from_north_magnetic_tilt_comp",
109 [IIO_MOD_NORTH_TRUE_TILT_COMP
] = "from_north_true_tilt_comp",
110 [IIO_MOD_RUNNING
] = "running",
111 [IIO_MOD_JOGGING
] = "jogging",
112 [IIO_MOD_WALKING
] = "walking",
113 [IIO_MOD_STILL
] = "still",
114 [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z
] = "sqrt(x^2+y^2+z^2)",
117 [IIO_MOD_CO2
] = "co2",
118 [IIO_MOD_ETHANOL
] = "ethanol",
120 [IIO_MOD_VOC
] = "voc",
121 [IIO_MOD_PM1
] = "pm1",
122 [IIO_MOD_PM2P5
] = "pm2p5",
123 [IIO_MOD_PM4
] = "pm4",
124 [IIO_MOD_PM10
] = "pm10",
127 static bool event_is_known(struct iio_event_data
*event
)
129 enum iio_chan_type type
= IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event
->id
);
130 enum iio_modifier mod
= IIO_EVENT_CODE_EXTRACT_MODIFIER(event
->id
);
131 enum iio_event_type ev_type
= IIO_EVENT_CODE_EXTRACT_TYPE(event
->id
);
132 enum iio_event_direction dir
= IIO_EVENT_CODE_EXTRACT_DIR(event
->id
);
149 case IIO_CAPACITANCE
:
153 case IIO_HUMIDITYRELATIVE
:
159 case IIO_CONCENTRATION
:
164 case IIO_POSITIONRELATIVE
:
166 case IIO_MASSCONCENTRATION
:
177 case IIO_MOD_X_AND_Y
:
178 case IIO_MOD_X_AND_Z
:
179 case IIO_MOD_Y_AND_Z
:
180 case IIO_MOD_X_AND_Y_AND_Z
:
184 case IIO_MOD_X_OR_Y_OR_Z
:
185 case IIO_MOD_LIGHT_BOTH
:
186 case IIO_MOD_LIGHT_IR
:
187 case IIO_MOD_ROOT_SUM_SQUARED_X_Y
:
188 case IIO_MOD_SUM_SQUARED_X_Y_Z
:
189 case IIO_MOD_LIGHT_CLEAR
:
190 case IIO_MOD_LIGHT_RED
:
191 case IIO_MOD_LIGHT_GREEN
:
192 case IIO_MOD_LIGHT_BLUE
:
193 case IIO_MOD_LIGHT_UV
:
194 case IIO_MOD_LIGHT_DUV
:
195 case IIO_MOD_QUATERNION
:
196 case IIO_MOD_TEMP_AMBIENT
:
197 case IIO_MOD_TEMP_OBJECT
:
198 case IIO_MOD_NORTH_MAGN
:
199 case IIO_MOD_NORTH_TRUE
:
200 case IIO_MOD_NORTH_MAGN_TILT_COMP
:
201 case IIO_MOD_NORTH_TRUE_TILT_COMP
:
202 case IIO_MOD_RUNNING
:
203 case IIO_MOD_JOGGING
:
204 case IIO_MOD_WALKING
:
206 case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z
:
210 case IIO_MOD_ETHANOL
:
223 case IIO_EV_TYPE_THRESH
:
224 case IIO_EV_TYPE_MAG
:
225 case IIO_EV_TYPE_ROC
:
226 case IIO_EV_TYPE_THRESH_ADAPTIVE
:
227 case IIO_EV_TYPE_MAG_ADAPTIVE
:
228 case IIO_EV_TYPE_CHANGE
:
235 case IIO_EV_DIR_EITHER
:
236 case IIO_EV_DIR_RISING
:
237 case IIO_EV_DIR_FALLING
:
238 case IIO_EV_DIR_NONE
:
247 static void print_event(struct iio_event_data
*event
)
249 enum iio_chan_type type
= IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event
->id
);
250 enum iio_modifier mod
= IIO_EVENT_CODE_EXTRACT_MODIFIER(event
->id
);
251 enum iio_event_type ev_type
= IIO_EVENT_CODE_EXTRACT_TYPE(event
->id
);
252 enum iio_event_direction dir
= IIO_EVENT_CODE_EXTRACT_DIR(event
->id
);
253 int chan
= IIO_EVENT_CODE_EXTRACT_CHAN(event
->id
);
254 int chan2
= IIO_EVENT_CODE_EXTRACT_CHAN2(event
->id
);
255 bool diff
= IIO_EVENT_CODE_EXTRACT_DIFF(event
->id
);
257 if (!event_is_known(event
)) {
258 fprintf(stderr
, "Unknown event: time: %lld, id: %llx\n",
259 event
->timestamp
, event
->id
);
264 printf("Event: time: %lld, type: %s", event
->timestamp
,
265 iio_chan_type_name_spec
[type
]);
267 if (mod
!= IIO_NO_MOD
)
268 printf("(%s)", iio_modifier_names
[mod
]);
271 printf(", channel: %d", chan
);
272 if (diff
&& chan2
>= 0)
273 printf("-%d", chan2
);
276 printf(", evtype: %s", iio_ev_type_text
[ev_type
]);
278 if (dir
!= IIO_EV_DIR_NONE
)
279 printf(", direction: %s", iio_ev_dir_text
[dir
]);
284 int main(int argc
, char **argv
)
286 struct iio_event_data event
;
287 const char *device_name
;
294 fprintf(stderr
, "Usage: %s <device_name>\n", argv
[0]);
298 device_name
= argv
[1];
300 dev_num
= find_type_by_name(device_name
, "iio:device");
302 printf("Found IIO device with name %s with device number %d\n",
303 device_name
, dev_num
);
304 ret
= asprintf(&chrdev_name
, "/dev/iio:device%d", dev_num
);
309 * If we can't find an IIO device by name assume device_name is
312 chrdev_name
= strdup(device_name
);
317 fd
= open(chrdev_name
, 0);
320 fprintf(stderr
, "Failed to open %s\n", chrdev_name
);
321 goto error_free_chrdev_name
;
324 ret
= ioctl(fd
, IIO_GET_EVENT_FD_IOCTL
, &event_fd
);
325 if (ret
== -1 || event_fd
== -1) {
329 "This device does not support events\n");
331 fprintf(stderr
, "Failed to retrieve event fd\n");
333 perror("Failed to close character device file");
335 goto error_free_chrdev_name
;
338 if (close(fd
) == -1) {
340 goto error_free_chrdev_name
;
344 ret
= read(event_fd
, &event
, sizeof(event
));
346 if (errno
== EAGAIN
) {
347 fprintf(stderr
, "nothing available\n");
351 perror("Failed to read event from device");
356 if (ret
!= sizeof(event
)) {
357 fprintf(stderr
, "Reading event failed!\n");
365 if (close(event_fd
) == -1)
366 perror("Failed to close event file");
368 error_free_chrdev_name
: