Lars-Peter Clausen <lars@xxxxxxxxxx> wrote:
>On 01/03/2012 03:54 PM, Lars-Peter Clausen wrote:
>> Add a small evtest like application to monitor events generated by an
>IIO
>> device. The application can be used as an example on how to listen
>for IIO
>> events and also is usful for testing and debugging device drivers
>which
>> generate IIO events.
>>
>> Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
>
>Hi Jonathon,
>
>You acked patch 1 and 2 of this series, but didn't comment on this one
>yet.
Looks good. I wanted to test it but never quite got to round to doing so. Have heard from elsewhere that it works well so happy to see it go in.
Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx>
>
>Thanks
>- Lars
>
>> ---
>> .../staging/iio/Documentation/iio_event_monitor.c | 241
>++++++++++++++++++++
>> 1 files changed, 241 insertions(+), 0 deletions(-)
>> create mode 100644
>drivers/staging/iio/Documentation/iio_event_monitor.c
>>
>> diff --git a/drivers/staging/iio/Documentation/iio_event_monitor.c
>b/drivers/staging/iio/Documentation/iio_event_monitor.c
>> new file mode 100644
>> index 0000000..5ca9d05
>> --- /dev/null
>> +++ b/drivers/staging/iio/Documentation/iio_event_monitor.c
>> @@ -0,0 +1,241 @@
>> +/* Industrialio buffer test code.
>> + *
>> + * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@xxxxxxxxxx>
>> + *
>> + * This program is free software; you can redistribute it and/or
>modify it
>> + * under the terms of the GNU General Public License version 2 as
>published by
>> + * the Free Software Foundation.
>> + *
>> + * This program is primarily intended as an example application.
>> + * Reads the current buffer setup from sysfs and starts a short
>capture
>> + * from the specified device, pretty printing the result after
>appropriate
>> + * conversion.
>> + *
>> + * Usage:
>> + * iio_event_monitor <device_name>
>> + *
>> + */
>> +
>> +#define _GNU_SOURCE
>> +
>> +#include <unistd.h>
>> +#include <stdbool.h>
>> +#include <stdio.h>
>> +#include <errno.h>
>> +#include <string.h>
>> +#include <poll.h>
>> +#include <fcntl.h>
>> +#include <sys/ioctl.h>
>> +#include "iio_utils.h"
>> +#include "../events.h"
>> +
>> +static const char * const iio_chan_type_name_spec[] = {
>> + [IIO_VOLTAGE] = "voltage",
>> + [IIO_CURRENT] = "current",
>> + [IIO_POWER] = "power",
>> + [IIO_ACCEL] = "accel",
>> + [IIO_ANGL_VEL] = "anglvel",
>> + [IIO_MAGN] = "magn",
>> + [IIO_LIGHT] = "illuminance",
>> + [IIO_INTENSITY] = "intensity",
>> + [IIO_PROXIMITY] = "proximity",
>> + [IIO_TEMP] = "temp",
>> + [IIO_INCLI] = "incli",
>> + [IIO_ROT] = "rot",
>> + [IIO_ANGL] = "angl",
>> + [IIO_TIMESTAMP] = "timestamp",
>> + [IIO_CAPACITANCE] = "capacitance",
>> +};
>> +
>> +static const char * const iio_ev_type_text[] = {
>> + [IIO_EV_TYPE_THRESH] = "thresh",
>> + [IIO_EV_TYPE_MAG] = "mag",
>> + [IIO_EV_TYPE_ROC] = "roc",
>> + [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
>> + [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
>> +};
>> +
>> +static const char * const iio_ev_dir_text[] = {
>> + [IIO_EV_DIR_EITHER] = "either",
>> + [IIO_EV_DIR_RISING] = "rising",
>> + [IIO_EV_DIR_FALLING] = "falling"
>> +};
>> +
>> +static const char * const iio_modifier_names[] = {
>> + [IIO_MOD_X] = "x",
>> + [IIO_MOD_Y] = "y",
>> + [IIO_MOD_Z] = "z",
>> + [IIO_MOD_LIGHT_BOTH] = "both",
>> + [IIO_MOD_LIGHT_IR] = "ir",
>> +};
>> +
>> +static bool event_is_known(struct iio_event_data *event)
>> +{
>> + enum iio_chan_type type =
>IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
>> + enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
>> + enum iio_event_type ev_type =
>IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
>> + enum iio_event_direction dir =
>IIO_EVENT_CODE_EXTRACT_DIR(event->id);
>> +
>> + switch (type) {
>> + case IIO_VOLTAGE:
>> + case IIO_CURRENT:
>> + case IIO_POWER:
>> + case IIO_ACCEL:
>> + case IIO_ANGL_VEL:
>> + case IIO_MAGN:
>> + case IIO_LIGHT:
>> + case IIO_INTENSITY:
>> + case IIO_PROXIMITY:
>> + case IIO_TEMP:
>> + case IIO_INCLI:
>> + case IIO_ROT:
>> + case IIO_ANGL:
>> + case IIO_TIMESTAMP:
>> + case IIO_CAPACITANCE:
>> + break;
>> + default:
>> + return false;
>> + }
>> +
>> + switch (mod) {
>> + case IIO_NO_MOD:
>> + case IIO_MOD_X:
>> + case IIO_MOD_Y:
>> + case IIO_MOD_Z:
>> + case IIO_MOD_LIGHT_BOTH:
>> + case IIO_MOD_LIGHT_IR:
>> + break;
>> + default:
>> + return false;
>> + }
>> +
>> + switch (ev_type) {
>> + case IIO_EV_TYPE_THRESH:
>> + case IIO_EV_TYPE_MAG:
>> + case IIO_EV_TYPE_ROC:
>> + case IIO_EV_TYPE_THRESH_ADAPTIVE:
>> + case IIO_EV_TYPE_MAG_ADAPTIVE:
>> + break;
>> + default:
>> + return false;
>> + }
>> +
>> + switch (dir) {
>> + case IIO_EV_DIR_EITHER:
>> + case IIO_EV_DIR_RISING:
>> + case IIO_EV_DIR_FALLING:
>> + break;
>> + default:
>> + return false;
>> + }
>> +
>> + return true;
>> +}
>> +
>> +static void print_event(struct iio_event_data *event)
>> +{
>> + enum iio_chan_type type =
>IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id);
>> + enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id);
>> + enum iio_event_type ev_type =
>IIO_EVENT_CODE_EXTRACT_TYPE(event->id);
>> + enum iio_event_direction dir =
>IIO_EVENT_CODE_EXTRACT_DIR(event->id);
>> + int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id);
>> + int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id);
>> + bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
>> +
>> + if (!event_is_known(event)) {
>> + printf("Unknown event: time: %lld, id: %llx\n",
>> + event->timestamp, event->id);
>> + return;
>> + }
>> +
>> + printf("Event: time: %lld, ", event->timestamp);
>> +
>> + if (mod != IIO_NO_MOD) {
>> + printf("type: %s(%s), ",
>> + iio_chan_type_name_spec[type],
>> + iio_modifier_names[mod]);
>> + } else {
>> + printf("type: %s, ",
>> + iio_chan_type_name_spec[type]);
>> + }
>> +
>> + if (diff && chan >= 0 && chan2 >= 0)
>> + printf("channel: %d-%d, ", chan, chan2);
>> + else if (chan >= 0)
>> + printf("channel: %d, ", chan);
>> +
>> + printf("evtype: %s, direction: %s\n",
>> + iio_ev_type_text[ev_type],
>> + iio_ev_dir_text[dir]);
>> +}
>> +
>> +int main(int argc, char **argv)
>> +{
>> + struct iio_event_data event;
>> + const char *device_name;
>> + char *chrdev_name;
>> + int ret;
>> + int dev_num;
>> + int fd, event_fd;
>> +
>> + if (argc <= 1) {
>> + printf("Usage: %s <device_name>\n", argv[0]);
>> + return -1;
>> + }
>> +
>> + device_name = argv[1];
>> +
>> + dev_num = find_type_by_name(device_name, "iio:device");
>> + if (dev_num >= 0) {
>> + printf("Found IIO device with name %s with device number %d\n",
>> + device_name, dev_num);
>> + ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num);
>> + if (ret < 0) {
>> + ret = -ENOMEM;
>> + goto error_ret;
>> + }
>> + } else {
>> + /* If we can't find a IIO device by name assume device_name is a
>> + IIO chrdev */
>> + chrdev_name = strdup(device_name);
>> + }
>> +
>> + fd = open(chrdev_name, 0);
>> + if (fd == -1) {
>> + fprintf(stdout, "Failed to open %s\n", chrdev_name);
>> + ret = -errno;
>> + goto error_free_chrdev_name;
>> + }
>> +
>> + ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
>> +
>> + close(fd);
>> +
>> + if (ret == -1 || event_fd == -1) {
>> + fprintf(stdout, "Failed to retrieve event fd\n");
>> + ret = -errno;
>> + goto error_free_chrdev_name;
>> + }
>> +
>> + while (true) {
>> + ret = read(event_fd, &event, sizeof(event));
>> + if (ret == -1) {
>> + if (errno == EAGAIN) {
>> + printf("nothing available\n");
>> + continue;
>> + } else {
>> + perror("Failed to read event from device");
>> + ret = -errno;
>> + break;
>> + }
>> + }
>> +
>> + print_event(&event);
>> + }
>> +
>> + close(event_fd);
>> +error_free_chrdev_name:
>> + free(chrdev_name);
>> +error_ret:
>> + return ret;
>> +}
>
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