2 * Author: Brendan Le Foll <brendan.le.foll@intel.com>
3 * Copyright (c) 2015 Intel Corporation.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 #include "mraa_internal.h"
30 #define IIO_SYSFS_DEVICE "/sys/bus/iio/devices/iio:device"
33 mraa_iio_init(int device)
35 if (device > plat->iio_device_count) {
39 mraa_iio_context dev = &plat->iio_devices[device];
46 if ((dir = opendir (IIO_SYSFS_DEVICE "0/")) != NULL) {
47 while ((ent = readdir (dir)) != NULL) {
48 if (strlen(ent->d_name) > 3) {
49 if (strncmp(ent->d_name, "in_", 3) == 0) {
51 buf = strndup(&ent->d_name[3], 64);
52 splitbuf = strsep(&buf, sep);
56 int num = atoi(&splitbuf[strlen(splitbuf)-1]);
57 if (dev->channum < num) {
62 else if (strncmp(ent->d_name, "out_", 4) == 0) {
75 // -1 is the device 'channel'
77 mraa_iio_get_attr_count(mraa_iio_context dev, int channel)
79 // search is 0 indexed
80 return dev->attrnum + 1;
84 mraa_iio_get_channel_count(mraa_iio_context dev)
86 // search is 0 indexed
87 return dev->channum + 1;
91 mraa_iio_get_device_name(mraa_iio_context dev)
98 mraa_iio_get_attr_data(mraa_iio_context dev, mraa_iio_channel* chan)
100 return MRAA_FEATURE_NOT_IMPLEMENTED;
105 mraa_iio_read(mraa_iio_context dev, const char* attribute, float* data)
108 snprintf(buf, 64, IIO_SYSFS_DEVICE, "%d/%s", dev->num, attribute);
109 int fd = open(buf, O_RDONLY);
111 int len = read(fd, &buf, 64);
112 *data = strtol(buf, NULL, 10);
115 return MRAA_ERROR_UNSPECIFIED;
119 mraa_iio_write(mraa_iio_context dev, const char* attribute)
121 return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
125 mraa_iio_stop(mraa_iio_context dev)