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Add OpenBeacon FTDI-based sniffer/reader
- Change default Baudrate for reader-prox firmware to 921600 Baud for OSX FTDI compatibility
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*.o | ||
/openbeacon_sniffer |
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CC := gcc | ||
CPPFLAGS := -D_THREAD_SAFE -D_REENTRANT | ||
CFLAGS := -O3 -W -Wall -Werror -I. | ||
LDLIBS := | ||
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TARGET := openbeacon_sniffer | ||
SOURCES := $(TARGET).c crypto.c crc32.c | ||
OBJECTS := $(patsubst %.c,%.o,$(SOURCES)) | ||
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all: $(TARGET) | ||
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$(TARGET): $(OBJECTS) | ||
$(CC) $(CFLAGS) $(CPPFLAGS) $^ -o $@ | ||
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clean: | ||
rm -f $(TARGET) $(OBJECTS) *.core *~ |
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/*- | ||
* COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or | ||
* code or tables extracted from it, as desired without restriction. | ||
* | ||
* First, the polynomial itself and its table of feedback terms. The | ||
* polynomial is | ||
* X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0 | ||
* | ||
* Note that we take it "backwards" and put the highest-order term in | ||
* the lowest-order bit. The X^32 term is "implied"; the LSB is the | ||
* X^31 term, etc. The X^0 term (usually shown as "+1") results in | ||
* the MSB being 1 | ||
* | ||
* Note that the usual hardware shift register implementation, which | ||
* is what we're using (we're merely optimizing it by doing eight-bit | ||
* chunks at a time) shifts bits into the lowest-order term. In our | ||
* implementation, that means shifting towards the right. Why do we | ||
* do it this way? Because the calculated CRC must be transmitted in | ||
* order from highest-order term to lowest-order term. UARTs transmit | ||
* characters in order from LSB to MSB. By storing the CRC this way | ||
* we hand it to the UART in the order low-byte to high-byte; the UART | ||
* sends each low-bit to hight-bit; and the result is transmission bit | ||
* by bit from highest- to lowest-order term without requiring any bit | ||
* shuffling on our part. Reception works similarly | ||
* | ||
* The feedback terms table consists of 256, 32-bit entries. Notes | ||
* | ||
* The table can be generated at runtime if desired; code to do so | ||
* is shown later. It might not be obvious, but the feedback | ||
* terms simply represent the results of eight shift/xor opera | ||
* tions for all combinations of data and CRC register values | ||
* | ||
* The values must be right-shifted by eight bits by the "updcrc | ||
* logic; the shift must be unsigned (bring in zeroes). On some | ||
* hardware you could probably optimize the shift in assembler by | ||
* using byte-swap instructions | ||
* polynomial $edb88320 | ||
* | ||
* | ||
* CRC32 code derived from work by Gary S. Brown. | ||
*/ | ||
#include <stdint.h> | ||
#include <crc32.h> | ||
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static uint32_t crc32_tab[] = { | ||
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, | ||
0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, | ||
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, | ||
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, | ||
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, | ||
0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, | ||
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, | ||
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0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, | ||
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, | ||
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, | ||
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, | ||
0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, | ||
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, | ||
0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, | ||
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, | ||
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0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, | ||
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, | ||
0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, | ||
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, | ||
0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, | ||
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, | ||
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, | ||
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, | ||
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0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, | ||
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, | ||
0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, | ||
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, | ||
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, | ||
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, | ||
0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, | ||
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, | ||
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0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, | ||
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, | ||
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, | ||
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, | ||
0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, | ||
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, | ||
0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, | ||
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, | ||
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0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, | ||
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, | ||
0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, | ||
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, | ||
0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, | ||
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, | ||
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, | ||
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, | ||
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0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, | ||
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, | ||
0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, | ||
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, | ||
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, | ||
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, | ||
0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, | ||
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, | ||
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0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, | ||
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, | ||
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, | ||
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, | ||
0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, | ||
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, | ||
0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, | ||
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, | ||
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d | ||
}; | ||
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uint32_t crc32(const void *buf, uint32_t size) | ||
{ | ||
uint32_t crc; | ||
const uint8_t *p; | ||
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p = (const uint8_t*)buf; | ||
crc = ~0U; | ||
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while (size--) | ||
crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8); | ||
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return crc ^ ~0U; | ||
} |
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/*************************************************************** | ||
* | ||
* OpenBeacon.org - CRC32 | ||
* | ||
* Copyright 2014 Milosch Meriac <[email protected]> | ||
* | ||
*************************************************************** | ||
This file is part of the OpenBeacon.org active RFID firmware | ||
OpenBeacon 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. | ||
OpenBeacon 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 Foobar. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#ifndef __CRC32_H__ | ||
#define __CRC32_H__ | ||
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extern uint32_t crc32(const void *buf, uint32_t size); | ||
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#endif/*__CRC32_H__*/ |
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