2 * Software License Agreement (BSD License)
4 * Copyright (c) 2010, Roel Verdult
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the copyright holders nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #define BLOCK_LENGTH 4
37 #define BLOCK_TOTAL (BLOCK_COUNT*BLOCK_LENGTH)
39 typedef unsigned char byte_t;
41 int main(int argc, char *argv[])
44 byte_t buf[BLOCK_TOTAL];
49 // Check for required arguments
52 printf("syntax: lpcrc <firmware.bin>\n");
56 // Try to open the supplied firmware
57 if ((pf = fopen(argv[1],"rb")) == NULL)
59 printf("error: could not open file [%s]\n", argv[1]);
63 // Read out the data blocks used for crc calculation
64 if (fread(buf,1,BLOCK_TOTAL,pf) != BLOCK_TOTAL)
66 printf("error: could not read required bytes\n");
71 // Compute the crc value
72 for (block=0; block<BLOCK_COUNT; block++)
74 crc += *((uint32_t*)(buf+(block*BLOCK_LENGTH)));
78 assert(fread(&cur_crc,1,BLOCK_LENGTH,pf) == BLOCK_LENGTH);
81 printf("cur_crc: %08x\n", cur_crc);
82 printf("new_crc: %08x\n", crc);
84 printf("CRC differs\n");