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Add CRC32 to lib/; add tool to make lpc313x bootloader images

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2506 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2010-01-16 02:12:48 +00:00
parent 858efc230e
commit 36dab07f02
9 changed files with 758 additions and 2 deletions
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4
ChangeLog
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@ -1039,3 +1039,7 @@
* arch/arm/src/sam3u, arch/arm/include/sam3u, and configs/sam3u-ek -
Added the basic framework needed to begin a port for the SAM3U-EK
development board.
* lib/lib_crc32.c: Add CRC32 logic by Gary S. Brown to lib/. This is
the larger (but faster) table look-up version of the CRC32 algorithm.
* confgs/ea3131/tools: Added a tool to create a image suitable for
use with the LPC313x bootloader.

4
Documentation/NuttX.html
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@ -8,7 +8,7 @@
<tr align="center" bgcolor="#e4e4e4">
<td>
<h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
<p>Last Updated: December 31, 2009</p>
<p>Last Updated: January 15, 2010</p>
</td>
</tr>
</table>
@ -1676,6 +1676,8 @@ nuttx-5.1 2010-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
* arch/arm/src/sam3u, arch/arm/include/sam3u, and configs/sam3u-ek -
Added the basic framework needed to begin a port for the SAM3U-EK
development board.
* confgs/ea3131/tools: Added a tool to create a image suitable for
use with the LPC313x bootloader.
pascal-2.1 2010-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;

53
configs/ea3131/tools/Makefile Executable file
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@ -0,0 +1,53 @@
############################################################################
# configs/ea3131/tools/Makefile
#
# Copyright (C) 2010 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <spudmonkey@racsa.co.cr>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
OBJS = lpchdr.o crc32.o
BIN = lpchdr
CFLAGS += -Wall -g
all: $(BIN)
.PHONY: clean
$(OBJS): %.o: %.c
$(CC) -c $(CFLAGS) $< -o $@
lpchdr: $(OBJS)
$(CC) -o $@ $^
clean:
@rm -f $(BIN) *.o *~

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configs/ea3131/tools/crc32.c Executable file
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@ -0,0 +1,123 @@
/************************************************************************************************
* configs/ea3131/tools/crc32.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
*
* The logic in this file was developed by Gary S. Brown:
*
* 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 operations 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 u_(bring in zeroes). On some hardware you could probably optimize the shift in
* assembler by using byte-swap instructions polynomial $edb88320
************************************************************************************************/
/************************************************************************************************
* Included Files
************************************************************************************************/
#include <sys/types.h>
#include <stdint.h>
#include "lpchdr.h"
/************************************************************************************************
* Private Data
************************************************************************************************/
static const 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, 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, 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, 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, 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, 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, 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, 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
};
/************************************************************************************************
* Public Functions
************************************************************************************************/
/************************************************************************************************
* Name: crc32part
*
* Description:
* Continue CRC calculation on a part of the buffer.
*
************************************************************************************************/
uint32_t crc32part(const uint8_t *src, size_t len, uint32_t crc32val)
{
size_t i;
for (i = 0; i < len; i++)
{
crc32val = crc32_tab[(crc32val ^ src[i]) & 0xff] ^ (crc32val >> 8);
}
return crc32val;
}
/************************************************************************************************
* Name: crc32
*
* Description:
* Return a 32-bit CRC of the contents of the 'src' buffer, length 'len'
*
************************************************************************************************/
uint32_t crc32(const uint8_t *src, size_t len)
{
return crc32part(src, len, 0);
}

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configs/ea3131/tools/lpchdr.c Executable file
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/************************************************************************************
* configs/ea3131/tools/lpchdr.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include "lpchdr.h"
/************************************************************************************
* Definitions
************************************************************************************/
/************************************************************************************
* Private Data
************************************************************************************/
static const char *g_infile;
static const char *g_outfile;
/************************************************************************************
* Private Functions
************************************************************************************/
static void show_usage(const char *progname, int exitcode)
{
fprintf(stderr, "%s -o <outfile> <infile>\n", progname);
exit(exitcode);
}
static void parse_args(int argc, char **argv)
{
int ch;
while ((ch = getopt(argc, argv, ":o:")) >= 0)
{
switch (ch)
{
case 'o':
g_outfile = optarg;
break;
case ':':
fprintf(stderr, "Missing option argumen\n");
show_usage(argv[0], 1);
case '?':
default:
fprintf(stderr, "Unrecognized option\n");
show_usage(argv[0], 1);
}
}
if (optind >= argc)
{
fprintf(stderr, "Missing binary input file name\n");
show_usage(argv[0], 1);
}
g_infile = argv[optind];
optind++;
if (optind < argc)
{
fprintf(stderr, "Garbage at the end of the command line\n");
show_usage(argv[0], 1);
}
}
static uint32_t infilecrc32(int infd, size_t len)
{
off_t offset;
uint8_t buffer[1024];
ssize_t nbytes;
size_t bytesread;
uint32_t crc;
offset = lseek(infd, 0, SEEK_SET);
if (offset == (off_t)-1)
{
fprintf(stderr, "lseek failed: %s\n", strerror(errno));
exit(4);
}
crc = 0;
for (bytesread = 0; bytesread < len; bytesread += nbytes)
{
nbytes = read(infd, buffer, 1024);
if (nbytes < 0)
{
fprintf(stderr, "read failed: %s\n", strerror(errno));
exit(4);
}
else if (nbytes == 0)
{
fprintf(stderr, "Unexpected end-of-file: %s\n", strerror(errno));
exit(4);
}
else
{
crc = crc32part(buffer, nbytes, crc);
}
}
return crc;
}
static void writefile(int infd, int outfd, size_t len)
{
off_t offset;
uint8_t buffer[1024];
ssize_t nbytesread;
ssize_t nbyteswritten;
size_t totalread;
offset = lseek(infd, 0, SEEK_SET);
if (offset == (off_t)-1)
{
fprintf(stderr, "lseek failed: %s\n", strerror(errno));
exit(4);
}
for (totalread = 0; totalread < len; totalread += nbytesread)
{
nbytesread = read(infd, buffer, 1024);
if (nbytesread < 0)
{
fprintf(stderr, "read failed: %s\n", strerror(errno));
exit(4);
}
else if (nbytesread == 0)
{
fprintf(stderr, "Unexpected end-of-file: %s\n", strerror(errno));
exit(4);
}
else
{
nbyteswritten = write(outfd, buffer, nbytesread);
if (nbyteswritten < 0)
{
fprintf(stderr, "write failed: %s\n", strerror(errno));
exit(4);
}
else if (nbyteswritten != nbytesread)
{
fprintf(stderr, "Short writes not handled\n");
exit(4);
}
}
}
}
/************************************************************************************
* Public Functions
************************************************************************************/
int main(int argc, char **argv, char **envp)
{
struct lpc313x_header_s g_hdr;
struct stat buf;
ssize_t nbytes;
int infd;
int outfd;
int ret;
/* Parse arguments */
parse_args(argc, argv);
/* Open files */
infd = open(g_infile, O_RDONLY);
if (infd < 0)
{
fprintf(stderr, "Failed to open %s for reading: %s\n", g_infile, strerror(errno));
exit(2);
}
outfd = open(g_outfile, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (outfd < 0)
{
fprintf(stderr, "Failed to open %s for writing: %s\n", g_outfile, strerror(errno));
exit(2);
}
/* Get the size of the binary file */
ret = fstat(infd, &buf);
if (ret < 0)
{
fprintf(stderr, "stat of %s failed: %s\n", g_infile, strerror(errno));
exit(3);
}
/* Initialize the header */
memset(&g_hdr, 0, sizeof(struct lpc313x_header_s));
g_hdr.vector = 0xea00001e; /* b 0x11029080 */
g_hdr.magic = 0x41676d69;
g_hdr.imageType = 0x0000000b;
g_hdr.imageLength = (buf.st_size + sizeof(struct lpc313x_header_s) + 511) & ~0x1ff;
g_hdr.execution_crc32 = infilecrc32(infd, buf.st_size);
g_hdr.header_crc32 = crc32((const uint8_t*)&g_hdr, 0x6c);
/* Write the header */
nbytes = write(outfd, &g_hdr, 0x80);
if (nbytes != 0x80)
{
fprintf(stderr, "write of header to of %s failed: %s\n", g_outfile, strerror(errno));
exit(4);
}
/* Copy the input file to the output */
writefile(infd, outfd, buf.st_size);
close(infd);
close(outfd);
return 0;
}

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configs/ea3131/tools/lpchdr.h Executable file
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/************************************************************************************
* configs/ea3131/tools/lpchdr.h
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __CONFIGS_EA3131_TOOLS_BINFMT_H
#define __CONFIGS_EA3131_TOOLS_BINFMT_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <stdint.h>
/************************************************************************************
* Definitions
************************************************************************************/
/************************************************************************************
* Public Types
************************************************************************************/
struct lpc313x_header_s
{
/* OFFS DESCRIPTION */
uint32_t vector; /* 0x00 Valid ARM instruction. Usually this will be
* a branch instruction to entry point of the
* image. */
uint32_t magic; /* 0x04 This field is used by boot ROM to detect a
* valid image header. This field should always
* be set to 0x41676d69. */
uint32_t execution_crc32; /* 0x08 CRC32 value of execution part of the image. If
* the ‘image_type’ is set to ‘0xA’, this field
* is ignored by boot ROM. */
uint32_t Reserved0[4]; /* 0x0c-0x18: Should be zero. */
uint32_t imageType; /* 0x1c Specifies whether CRC check should be done
* on the image or not:
* 0xA – No CRC check required.
* 0xB – Do CRC32 check on both header and
* execution part of the image. */
uint32_t imageLength; /* 0x20 Total image length including header rounded
* up to the nearest 512 byte boundary. In C
* language the field can be computed as:
* imageLength = (Actual length + 511) & ~0x1FF; */
uint32_t releaseID; /* 0x24 Release or version number of the image. Note,
* this field is not used by boot ROM but is
* provided to track the image versions. */
uint32_t buildTime; /* 0x28 Time (expressed in EPOC time format) at which
* image is built. Note, this field is not used
* by boot ROM but is provided to track the image
* versions. */
uint32_t sbzBootParameter; /* 0x2c hould be zero. */
uint32_t cust_reserved[15]; /* 0x30-0x68: Reserved for customer use (60 bytes) */
uint32_t header_crc32; /* 0x6c CRC32 value of the header (bytes 0x00 to 0x6C
* of the image). If the ‘image_type’ is set
* to ‘0xA’, this field is ignored by boot ROM. */
uint32_t Reserved1[4]; /* 0x70-0x7c: Should be zero. */
/* 0x80 Start of program code (128Kb max). The final
* image has to be padded to the nearest 512
* byte boundary */
};
/************************************************************************************
* Public data
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
extern uint32_t crc32part(const uint8_t *src, size_t len, uint32_t crc32val);
extern uint32_t crc32(const uint8_t *src, size_t len);
#endif /* __CONFIGS_EA3131_TOOLS_BINFMT_H */

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include/crc32.h Executable file
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/****************************************************************************
* include/crc.h
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_CRC32_H
#define __INCLUDE_CRC32_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
#include <stdint.h>
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/************************************************************************************
* Name: crc32part
*
* Description:
* Continue CRC calculation on a part of the buffer.
*
************************************************************************************/
EXTERN uint32_t crc32part(FAR const uint8_t *src, size_t len, uint32_t crc32val);
/************************************************************************************
* Name: crc32
*
* Description:
* Return a 32-bit CRC of the contents of the 'src' buffer, length 'len'
*
************************************************************************************/
EXTERN uint32_t crc32(FAR const uint8_t *src, size_t len);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __INCLUDE_CRC32_H */

4
lib/Makefile
View File

@ -92,6 +92,8 @@ LIBGEN_SRCS = lib_basename.c lib_dirname.c
REGEX_SRCS = lib_match.c
CRC_SRCS = lib_crc32.c
SQ_SRCS = sq_addlast.c sq_addfirst.c sq_addafter.c \
sq_rem.c sq_remlast.c sq_remfirst.c sq_remafter.c
@ -102,7 +104,7 @@ DBG_SRCS = lib_dbg.c lib_dumpbuffer.c
CSRCS = $(MISC_SRCS) $(STRING_SRCS) $(CTYPE_SRCS) $(STDIO_SRCS) $(STDLIB_SRCS) \
$(MATH_SRCS) $(UNISTD_SRCS) $(TIME_SRCS) $(NET_SRCS) $(LIBGEN_SRCS) \
$(REGEX_SRCS) $(SQ_SRCS) $(DQ_SRCS) $(DBG_SRCS)
$(REGEX_SRCS) $(CRC_SRCS) $(SQ_SRCS) $(DQ_SRCS) $(DBG_SRCS)
COBJS = $(CSRCS:.c=$(OBJEXT))
SRCS = $(ASRCS) $(CSRCS)

123
lib/lib_crc32.c Executable file
View File

@ -0,0 +1,123 @@
/************************************************************************************************
* lib/lib_crc32.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
*
* The logic in this file was developed by Gary S. Brown:
*
* 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 operations 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 u_(bring in zeroes). On some hardware you could probably optimize the shift in
* assembler by using byte-swap instructions polynomial $edb88320
************************************************************************************************/
/************************************************************************************************
* Included Files
************************************************************************************************/
#include <sys/types.h>
#include <stdint.h>
#include <crc32.h>
/************************************************************************************************
* Private Data
************************************************************************************************/
static const 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, 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, 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, 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, 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, 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, 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, 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
};
/************************************************************************************************
* Public Functions
************************************************************************************************/
/************************************************************************************************
* Name: crc32part
*
* Description:
* Continue CRC calculation on a part of the buffer.
*
************************************************************************************************/
uint32_t crc32part(FAR const uint8_t *src, size_t len, uint32_t crc32val)
{
size_t i;
for (i = 0; i < len; i++)
{
crc32val = crc32_tab[(crc32val ^ src[i]) & 0xff] ^ (crc32val >> 8);
}
return crc32val;
}
/************************************************************************************************
* Name: crc32
*
* Description:
* Return a 32-bit CRC of the contents of the 'src' buffer, length 'len'
*
************************************************************************************************/
uint32_t crc32(FAR const uint8_t *src, size_t len)
{
return crc32part(src, len, 0);
}