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Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001/*
Sven Eckelmann64afe352011-01-27 10:38:15 +01002 * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00003 *
4 * Marek Lindner
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA
19 *
20 */
21
22#include "main.h"
23#include "ring_buffer.h"
24
25void ring_buffer_set(uint8_t lq_recv[], uint8_t *lq_index, uint8_t value)
26{
27 lq_recv[*lq_index] = value;
28 *lq_index = (*lq_index + 1) % TQ_GLOBAL_WINDOW_SIZE;
29}
30
Sven Eckelmann747e4222011-05-14 23:14:50 +020031uint8_t ring_buffer_avg(const uint8_t lq_recv[])
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000032{
Sven Eckelmann747e4222011-05-14 23:14:50 +020033 const uint8_t *ptr;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000034 uint16_t count = 0, i = 0, sum = 0;
35
36 ptr = lq_recv;
37
38 while (i < TQ_GLOBAL_WINDOW_SIZE) {
39 if (*ptr != 0) {
40 count++;
41 sum += *ptr;
42 }
43
44 i++;
45 ptr++;
46 }
47
48 if (count == 0)
49 return 0;
50
51 return (uint8_t)(sum / count);
52}