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Diffstat (limited to 'firecode.c')
-rw-r--r-- | firecode.c | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/firecode.c b/firecode.c deleted file mode 100644 index 47ee976..0000000 --- a/firecode.c +++ /dev/null @@ -1,50 +0,0 @@ -/* - Copyright (C) 2014 Matthias P. Braendli (http://www.opendigitalradio.org) - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. - - firecode.c - Implement a FireCode CRC calculator - - Authors: - Matthias P. Braendli <matthias@mpb.li> -*/ - -#include "firecode.h" - -uint16_t firecode_crc(uint8_t* buf, size_t size) -{ - int crc; - int gen_poly; - - crc = 0x0000; - gen_poly = 0x782F; // 0111 1000 0010 1111 (16, 14, 13, 12, 11, 5, 3, 2, 1, 0) - - for (size_t len = 0; len < size; len++) { - for (int i = 0x80; i != 0; i >>= 1) { - if ((crc & 0x8000) != 0) { - crc = (crc << 1) ^ gen_poly; - } - else { - crc = crc << 1; - } - if ((buf[len] & i) != 0) { - crc ^= gen_poly; - } - } - } - - return crc & 0xFFFF; -} - |