Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 1 | /* 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> |
| 16 | * |
| 17 | */ |
| 18 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 19 | #include <unistd.h> |
Roberta Dobrescu | bdcb31d | 2015-02-26 10:49:24 +0200 | [diff] [blame] | 20 | #include <stdlib.h> |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 21 | #include <stdbool.h> |
| 22 | #include <stdio.h> |
| 23 | #include <errno.h> |
| 24 | #include <string.h> |
| 25 | #include <poll.h> |
| 26 | #include <fcntl.h> |
| 27 | #include <sys/ioctl.h> |
| 28 | #include "iio_utils.h" |
Jonathan Cameron | 06458e2 | 2012-04-25 15:54:58 +0100 | [diff] [blame] | 29 | #include <linux/iio/events.h> |
Roberta Dobrescu | 9576385 | 2015-02-26 10:49:23 +0200 | [diff] [blame] | 30 | #include <linux/iio/types.h> |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 31 | |
| 32 | static const char * const iio_chan_type_name_spec[] = { |
| 33 | [IIO_VOLTAGE] = "voltage", |
| 34 | [IIO_CURRENT] = "current", |
| 35 | [IIO_POWER] = "power", |
| 36 | [IIO_ACCEL] = "accel", |
| 37 | [IIO_ANGL_VEL] = "anglvel", |
| 38 | [IIO_MAGN] = "magn", |
| 39 | [IIO_LIGHT] = "illuminance", |
| 40 | [IIO_INTENSITY] = "intensity", |
| 41 | [IIO_PROXIMITY] = "proximity", |
| 42 | [IIO_TEMP] = "temp", |
| 43 | [IIO_INCLI] = "incli", |
| 44 | [IIO_ROT] = "rot", |
| 45 | [IIO_ANGL] = "angl", |
| 46 | [IIO_TIMESTAMP] = "timestamp", |
| 47 | [IIO_CAPACITANCE] = "capacitance", |
Peter Meerwald | a216014 | 2012-06-15 19:25:26 +0200 | [diff] [blame] | 48 | [IIO_ALTVOLTAGE] = "altvoltage", |
Peter Meerwald | 0378250 | 2014-12-06 06:00:00 +0000 | [diff] [blame] | 49 | [IIO_CCT] = "cct", |
| 50 | [IIO_PRESSURE] = "pressure", |
| 51 | [IIO_HUMIDITYRELATIVE] = "humidityrelative", |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 52 | [IIO_ACTIVITY] = "activity", |
| 53 | [IIO_STEPS] = "steps", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 54 | }; |
| 55 | |
| 56 | static const char * const iio_ev_type_text[] = { |
| 57 | [IIO_EV_TYPE_THRESH] = "thresh", |
| 58 | [IIO_EV_TYPE_MAG] = "mag", |
| 59 | [IIO_EV_TYPE_ROC] = "roc", |
| 60 | [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive", |
| 61 | [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive", |
Irina Tirdea | 27be842 | 2015-01-11 21:10:11 +0200 | [diff] [blame] | 62 | [IIO_EV_TYPE_CHANGE] = "change", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | static const char * const iio_ev_dir_text[] = { |
| 66 | [IIO_EV_DIR_EITHER] = "either", |
| 67 | [IIO_EV_DIR_RISING] = "rising", |
| 68 | [IIO_EV_DIR_FALLING] = "falling" |
| 69 | }; |
| 70 | |
| 71 | static const char * const iio_modifier_names[] = { |
| 72 | [IIO_MOD_X] = "x", |
| 73 | [IIO_MOD_Y] = "y", |
| 74 | [IIO_MOD_Z] = "z", |
Roberta Dobrescu | 0a6e217 | 2014-10-22 16:50:17 +0300 | [diff] [blame] | 75 | [IIO_MOD_X_AND_Y] = "x&y", |
| 76 | [IIO_MOD_X_AND_Z] = "x&z", |
| 77 | [IIO_MOD_Y_AND_Z] = "y&z", |
| 78 | [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z", |
| 79 | [IIO_MOD_X_OR_Y] = "x|y", |
| 80 | [IIO_MOD_X_OR_Z] = "x|z", |
| 81 | [IIO_MOD_Y_OR_Z] = "y|z", |
| 82 | [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 83 | [IIO_MOD_LIGHT_BOTH] = "both", |
| 84 | [IIO_MOD_LIGHT_IR] = "ir", |
Peter Meerwald | da4db94 | 2012-07-01 12:20:13 +0200 | [diff] [blame] | 85 | [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)", |
| 86 | [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2", |
| 87 | [IIO_MOD_LIGHT_CLEAR] = "clear", |
| 88 | [IIO_MOD_LIGHT_RED] = "red", |
| 89 | [IIO_MOD_LIGHT_GREEN] = "green", |
| 90 | [IIO_MOD_LIGHT_BLUE] = "blue", |
Roberta Dobrescu | 0a6e217 | 2014-10-22 16:50:17 +0300 | [diff] [blame] | 91 | [IIO_MOD_QUATERNION] = "quaternion", |
| 92 | [IIO_MOD_TEMP_AMBIENT] = "ambient", |
| 93 | [IIO_MOD_TEMP_OBJECT] = "object", |
| 94 | [IIO_MOD_NORTH_MAGN] = "from_north_magnetic", |
| 95 | [IIO_MOD_NORTH_TRUE] = "from_north_true", |
| 96 | [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp", |
| 97 | [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp", |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 98 | [IIO_MOD_RUNNING] = "running", |
| 99 | [IIO_MOD_JOGGING] = "jogging", |
| 100 | [IIO_MOD_WALKING] = "walking", |
| 101 | [IIO_MOD_STILL] = "still", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 102 | }; |
| 103 | |
| 104 | static bool event_is_known(struct iio_event_data *event) |
| 105 | { |
| 106 | enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); |
| 107 | enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); |
| 108 | enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); |
| 109 | enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); |
| 110 | |
| 111 | switch (type) { |
| 112 | case IIO_VOLTAGE: |
| 113 | case IIO_CURRENT: |
| 114 | case IIO_POWER: |
| 115 | case IIO_ACCEL: |
| 116 | case IIO_ANGL_VEL: |
| 117 | case IIO_MAGN: |
| 118 | case IIO_LIGHT: |
| 119 | case IIO_INTENSITY: |
| 120 | case IIO_PROXIMITY: |
| 121 | case IIO_TEMP: |
| 122 | case IIO_INCLI: |
| 123 | case IIO_ROT: |
| 124 | case IIO_ANGL: |
| 125 | case IIO_TIMESTAMP: |
| 126 | case IIO_CAPACITANCE: |
Peter Meerwald | a216014 | 2012-06-15 19:25:26 +0200 | [diff] [blame] | 127 | case IIO_ALTVOLTAGE: |
Peter Meerwald | 0378250 | 2014-12-06 06:00:00 +0000 | [diff] [blame] | 128 | case IIO_CCT: |
| 129 | case IIO_PRESSURE: |
| 130 | case IIO_HUMIDITYRELATIVE: |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 131 | case IIO_ACTIVITY: |
| 132 | case IIO_STEPS: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 133 | break; |
| 134 | default: |
| 135 | return false; |
| 136 | } |
| 137 | |
| 138 | switch (mod) { |
| 139 | case IIO_NO_MOD: |
| 140 | case IIO_MOD_X: |
| 141 | case IIO_MOD_Y: |
| 142 | case IIO_MOD_Z: |
Roberta Dobrescu | 0a6e217 | 2014-10-22 16:50:17 +0300 | [diff] [blame] | 143 | case IIO_MOD_X_AND_Y: |
| 144 | case IIO_MOD_X_AND_Z: |
| 145 | case IIO_MOD_Y_AND_Z: |
| 146 | case IIO_MOD_X_AND_Y_AND_Z: |
| 147 | case IIO_MOD_X_OR_Y: |
| 148 | case IIO_MOD_X_OR_Z: |
| 149 | case IIO_MOD_Y_OR_Z: |
| 150 | case IIO_MOD_X_OR_Y_OR_Z: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 151 | case IIO_MOD_LIGHT_BOTH: |
| 152 | case IIO_MOD_LIGHT_IR: |
Peter Meerwald | da4db94 | 2012-07-01 12:20:13 +0200 | [diff] [blame] | 153 | case IIO_MOD_ROOT_SUM_SQUARED_X_Y: |
| 154 | case IIO_MOD_SUM_SQUARED_X_Y_Z: |
| 155 | case IIO_MOD_LIGHT_CLEAR: |
| 156 | case IIO_MOD_LIGHT_RED: |
| 157 | case IIO_MOD_LIGHT_GREEN: |
| 158 | case IIO_MOD_LIGHT_BLUE: |
Roberta Dobrescu | 0a6e217 | 2014-10-22 16:50:17 +0300 | [diff] [blame] | 159 | case IIO_MOD_QUATERNION: |
| 160 | case IIO_MOD_TEMP_AMBIENT: |
| 161 | case IIO_MOD_TEMP_OBJECT: |
| 162 | case IIO_MOD_NORTH_MAGN: |
| 163 | case IIO_MOD_NORTH_TRUE: |
| 164 | case IIO_MOD_NORTH_MAGN_TILT_COMP: |
| 165 | case IIO_MOD_NORTH_TRUE_TILT_COMP: |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 166 | case IIO_MOD_RUNNING: |
| 167 | case IIO_MOD_JOGGING: |
| 168 | case IIO_MOD_WALKING: |
| 169 | case IIO_MOD_STILL: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 170 | break; |
| 171 | default: |
| 172 | return false; |
| 173 | } |
| 174 | |
| 175 | switch (ev_type) { |
| 176 | case IIO_EV_TYPE_THRESH: |
| 177 | case IIO_EV_TYPE_MAG: |
| 178 | case IIO_EV_TYPE_ROC: |
| 179 | case IIO_EV_TYPE_THRESH_ADAPTIVE: |
| 180 | case IIO_EV_TYPE_MAG_ADAPTIVE: |
Irina Tirdea | 27be842 | 2015-01-11 21:10:11 +0200 | [diff] [blame] | 181 | case IIO_EV_TYPE_CHANGE: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 182 | break; |
| 183 | default: |
| 184 | return false; |
| 185 | } |
| 186 | |
| 187 | switch (dir) { |
| 188 | case IIO_EV_DIR_EITHER: |
| 189 | case IIO_EV_DIR_RISING: |
| 190 | case IIO_EV_DIR_FALLING: |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 191 | case IIO_EV_DIR_NONE: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 192 | break; |
| 193 | default: |
| 194 | return false; |
| 195 | } |
| 196 | |
| 197 | return true; |
| 198 | } |
| 199 | |
| 200 | static void print_event(struct iio_event_data *event) |
| 201 | { |
| 202 | enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); |
| 203 | enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); |
| 204 | enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); |
| 205 | enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); |
| 206 | int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id); |
| 207 | int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id); |
| 208 | bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id); |
| 209 | |
| 210 | if (!event_is_known(event)) { |
| 211 | printf("Unknown event: time: %lld, id: %llx\n", |
| 212 | event->timestamp, event->id); |
| 213 | return; |
| 214 | } |
| 215 | |
| 216 | printf("Event: time: %lld, ", event->timestamp); |
| 217 | |
| 218 | if (mod != IIO_NO_MOD) { |
| 219 | printf("type: %s(%s), ", |
| 220 | iio_chan_type_name_spec[type], |
| 221 | iio_modifier_names[mod]); |
| 222 | } else { |
| 223 | printf("type: %s, ", |
| 224 | iio_chan_type_name_spec[type]); |
| 225 | } |
| 226 | |
| 227 | if (diff && chan >= 0 && chan2 >= 0) |
| 228 | printf("channel: %d-%d, ", chan, chan2); |
| 229 | else if (chan >= 0) |
| 230 | printf("channel: %d, ", chan); |
| 231 | |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 232 | printf("evtype: %s", iio_ev_type_text[ev_type]); |
| 233 | |
| 234 | if (dir != IIO_EV_DIR_NONE) |
| 235 | printf(", direction: %s", iio_ev_dir_text[dir]); |
| 236 | printf("\n"); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | int main(int argc, char **argv) |
| 240 | { |
| 241 | struct iio_event_data event; |
| 242 | const char *device_name; |
| 243 | char *chrdev_name; |
| 244 | int ret; |
| 245 | int dev_num; |
| 246 | int fd, event_fd; |
| 247 | |
| 248 | if (argc <= 1) { |
| 249 | printf("Usage: %s <device_name>\n", argv[0]); |
| 250 | return -1; |
| 251 | } |
| 252 | |
| 253 | device_name = argv[1]; |
| 254 | |
| 255 | dev_num = find_type_by_name(device_name, "iio:device"); |
| 256 | if (dev_num >= 0) { |
| 257 | printf("Found IIO device with name %s with device number %d\n", |
| 258 | device_name, dev_num); |
| 259 | ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num); |
| 260 | if (ret < 0) { |
| 261 | ret = -ENOMEM; |
| 262 | goto error_ret; |
| 263 | } |
| 264 | } else { |
| 265 | /* If we can't find a IIO device by name assume device_name is a |
| 266 | IIO chrdev */ |
| 267 | chrdev_name = strdup(device_name); |
| 268 | } |
| 269 | |
| 270 | fd = open(chrdev_name, 0); |
| 271 | if (fd == -1) { |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 272 | ret = -errno; |
Hartmut Knaack | 2b6a6e6 | 2015-05-31 14:39:48 +0200 | [diff] [blame] | 273 | fprintf(stdout, "Failed to open %s\n", chrdev_name); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 274 | goto error_free_chrdev_name; |
| 275 | } |
| 276 | |
| 277 | ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 278 | if (ret == -1 || event_fd == -1) { |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 279 | ret = -errno; |
Hartmut Knaack | 2b6a6e6 | 2015-05-31 14:39:48 +0200 | [diff] [blame] | 280 | fprintf(stdout, "Failed to retrieve event fd\n"); |
Hartmut Knaack | 5fdb8c6 | 2015-05-31 14:39:49 +0200 | [diff] [blame^] | 281 | if (close(fd) == -1) |
| 282 | perror("Failed to close character device file"); |
| 283 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 284 | goto error_free_chrdev_name; |
| 285 | } |
| 286 | |
Hartmut Knaack | 5fdb8c6 | 2015-05-31 14:39:49 +0200 | [diff] [blame^] | 287 | close(fd); |
| 288 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 289 | while (true) { |
| 290 | ret = read(event_fd, &event, sizeof(event)); |
| 291 | if (ret == -1) { |
| 292 | if (errno == EAGAIN) { |
| 293 | printf("nothing available\n"); |
| 294 | continue; |
| 295 | } else { |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 296 | ret = -errno; |
Hartmut Knaack | 2b6a6e6 | 2015-05-31 14:39:48 +0200 | [diff] [blame] | 297 | perror("Failed to read event from device"); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 298 | break; |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | print_event(&event); |
| 303 | } |
| 304 | |
| 305 | close(event_fd); |
| 306 | error_free_chrdev_name: |
| 307 | free(chrdev_name); |
| 308 | error_ret: |
| 309 | return ret; |
| 310 | } |