2 * Author: Brendan Le Foll
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.
29 printword(uint16_t input, mraa_iio_channel *chan)
33 input = be16toh(input);
35 input = le16toh(input);
38 // currently we don't treat scales
41 input >>= chan->shift;
44 res = (int16_t)(input << (16 - chan->bits_used)) >> (16 - chan->bits_used);
48 printf("chan %d == %05f\n", chan->index, ((float)res + chan->offset) * chan->scale);
51 mraa_iio_context iio_device0;
56 mraa_iio_channel* channels = mraa_iio_get_channels(iio_device0);
59 for (i; i < mraa_iio_get_channel_count(iio_device0); i++) {
60 printf("channel bytes %d\n", channels[i].bytes);
61 switch (channels[i].bytes) {
63 printword(*(uint16_t *)(data + channels[i].location), &channels[i]);
66 printf("data %s\n", (char*) data);
73 iio_device0 = mraa_iio_init(0);
74 if (iio_device0 == NULL) {
79 mraa_result_t ret = mraa_iio_read(iio_device0, "in_voltage0_raw", &iio_value);
80 if (ret == MRAA_SUCCESS) {
81 fprintf(stdout, "IIO read %f\n", iio_value);
84 if (mraa_iio_trigger_buffer(iio_device0, interrupt, NULL) == MRAA_SUCCESS) {