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 | |
| 19 | #define _GNU_SOURCE |
| 20 | |
| 21 | #include <unistd.h> |
| 22 | #include <stdbool.h> |
| 23 | #include <stdio.h> |
| 24 | #include <errno.h> |
| 25 | #include <string.h> |
| 26 | #include <poll.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <sys/ioctl.h> |
| 29 | #include "iio_utils.h" |
Jonathan Cameron | 06458e2 | 2012-04-25 15:54:58 +0100 | [diff] [blame] | 30 | #include <linux/iio/events.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", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 49 | }; |
| 50 | |
| 51 | static const char * const iio_ev_type_text[] = { |
| 52 | [IIO_EV_TYPE_THRESH] = "thresh", |
| 53 | [IIO_EV_TYPE_MAG] = "mag", |
| 54 | [IIO_EV_TYPE_ROC] = "roc", |
| 55 | [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive", |
| 56 | [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive", |
| 57 | }; |
| 58 | |
| 59 | static const char * const iio_ev_dir_text[] = { |
| 60 | [IIO_EV_DIR_EITHER] = "either", |
| 61 | [IIO_EV_DIR_RISING] = "rising", |
| 62 | [IIO_EV_DIR_FALLING] = "falling" |
| 63 | }; |
| 64 | |
| 65 | static const char * const iio_modifier_names[] = { |
| 66 | [IIO_MOD_X] = "x", |
| 67 | [IIO_MOD_Y] = "y", |
| 68 | [IIO_MOD_Z] = "z", |
| 69 | [IIO_MOD_LIGHT_BOTH] = "both", |
| 70 | [IIO_MOD_LIGHT_IR] = "ir", |
| 71 | }; |
| 72 | |
| 73 | static bool event_is_known(struct iio_event_data *event) |
| 74 | { |
| 75 | enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); |
| 76 | enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); |
| 77 | enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); |
| 78 | enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); |
| 79 | |
| 80 | switch (type) { |
| 81 | case IIO_VOLTAGE: |
| 82 | case IIO_CURRENT: |
| 83 | case IIO_POWER: |
| 84 | case IIO_ACCEL: |
| 85 | case IIO_ANGL_VEL: |
| 86 | case IIO_MAGN: |
| 87 | case IIO_LIGHT: |
| 88 | case IIO_INTENSITY: |
| 89 | case IIO_PROXIMITY: |
| 90 | case IIO_TEMP: |
| 91 | case IIO_INCLI: |
| 92 | case IIO_ROT: |
| 93 | case IIO_ANGL: |
| 94 | case IIO_TIMESTAMP: |
| 95 | case IIO_CAPACITANCE: |
Peter Meerwald | a216014 | 2012-06-15 19:25:26 +0200 | [diff] [blame^] | 96 | case IIO_ALTVOLTAGE: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 97 | break; |
| 98 | default: |
| 99 | return false; |
| 100 | } |
| 101 | |
| 102 | switch (mod) { |
| 103 | case IIO_NO_MOD: |
| 104 | case IIO_MOD_X: |
| 105 | case IIO_MOD_Y: |
| 106 | case IIO_MOD_Z: |
| 107 | case IIO_MOD_LIGHT_BOTH: |
| 108 | case IIO_MOD_LIGHT_IR: |
| 109 | break; |
| 110 | default: |
| 111 | return false; |
| 112 | } |
| 113 | |
| 114 | switch (ev_type) { |
| 115 | case IIO_EV_TYPE_THRESH: |
| 116 | case IIO_EV_TYPE_MAG: |
| 117 | case IIO_EV_TYPE_ROC: |
| 118 | case IIO_EV_TYPE_THRESH_ADAPTIVE: |
| 119 | case IIO_EV_TYPE_MAG_ADAPTIVE: |
| 120 | break; |
| 121 | default: |
| 122 | return false; |
| 123 | } |
| 124 | |
| 125 | switch (dir) { |
| 126 | case IIO_EV_DIR_EITHER: |
| 127 | case IIO_EV_DIR_RISING: |
| 128 | case IIO_EV_DIR_FALLING: |
| 129 | break; |
| 130 | default: |
| 131 | return false; |
| 132 | } |
| 133 | |
| 134 | return true; |
| 135 | } |
| 136 | |
| 137 | static void print_event(struct iio_event_data *event) |
| 138 | { |
| 139 | enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); |
| 140 | enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); |
| 141 | enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); |
| 142 | enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); |
| 143 | int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id); |
| 144 | int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id); |
| 145 | bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id); |
| 146 | |
| 147 | if (!event_is_known(event)) { |
| 148 | printf("Unknown event: time: %lld, id: %llx\n", |
| 149 | event->timestamp, event->id); |
| 150 | return; |
| 151 | } |
| 152 | |
| 153 | printf("Event: time: %lld, ", event->timestamp); |
| 154 | |
| 155 | if (mod != IIO_NO_MOD) { |
| 156 | printf("type: %s(%s), ", |
| 157 | iio_chan_type_name_spec[type], |
| 158 | iio_modifier_names[mod]); |
| 159 | } else { |
| 160 | printf("type: %s, ", |
| 161 | iio_chan_type_name_spec[type]); |
| 162 | } |
| 163 | |
| 164 | if (diff && chan >= 0 && chan2 >= 0) |
| 165 | printf("channel: %d-%d, ", chan, chan2); |
| 166 | else if (chan >= 0) |
| 167 | printf("channel: %d, ", chan); |
| 168 | |
| 169 | printf("evtype: %s, direction: %s\n", |
| 170 | iio_ev_type_text[ev_type], |
| 171 | iio_ev_dir_text[dir]); |
| 172 | } |
| 173 | |
| 174 | int main(int argc, char **argv) |
| 175 | { |
| 176 | struct iio_event_data event; |
| 177 | const char *device_name; |
| 178 | char *chrdev_name; |
| 179 | int ret; |
| 180 | int dev_num; |
| 181 | int fd, event_fd; |
| 182 | |
| 183 | if (argc <= 1) { |
| 184 | printf("Usage: %s <device_name>\n", argv[0]); |
| 185 | return -1; |
| 186 | } |
| 187 | |
| 188 | device_name = argv[1]; |
| 189 | |
| 190 | dev_num = find_type_by_name(device_name, "iio:device"); |
| 191 | if (dev_num >= 0) { |
| 192 | printf("Found IIO device with name %s with device number %d\n", |
| 193 | device_name, dev_num); |
| 194 | ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num); |
| 195 | if (ret < 0) { |
| 196 | ret = -ENOMEM; |
| 197 | goto error_ret; |
| 198 | } |
| 199 | } else { |
| 200 | /* If we can't find a IIO device by name assume device_name is a |
| 201 | IIO chrdev */ |
| 202 | chrdev_name = strdup(device_name); |
| 203 | } |
| 204 | |
| 205 | fd = open(chrdev_name, 0); |
| 206 | if (fd == -1) { |
| 207 | fprintf(stdout, "Failed to open %s\n", chrdev_name); |
| 208 | ret = -errno; |
| 209 | goto error_free_chrdev_name; |
| 210 | } |
| 211 | |
| 212 | ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); |
| 213 | |
| 214 | close(fd); |
| 215 | |
| 216 | if (ret == -1 || event_fd == -1) { |
| 217 | fprintf(stdout, "Failed to retrieve event fd\n"); |
| 218 | ret = -errno; |
| 219 | goto error_free_chrdev_name; |
| 220 | } |
| 221 | |
| 222 | while (true) { |
| 223 | ret = read(event_fd, &event, sizeof(event)); |
| 224 | if (ret == -1) { |
| 225 | if (errno == EAGAIN) { |
| 226 | printf("nothing available\n"); |
| 227 | continue; |
| 228 | } else { |
| 229 | perror("Failed to read event from device"); |
| 230 | ret = -errno; |
| 231 | break; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | print_event(&event); |
| 236 | } |
| 237 | |
| 238 | close(event_fd); |
| 239 | error_free_chrdev_name: |
| 240 | free(chrdev_name); |
| 241 | error_ret: |
| 242 | return ret; |
| 243 | } |