From: bernie <bernie@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Thu, 3 Jun 2004 08:58:16 +0000 (+0000)
Subject: Import into DevLib
X-Git-Tag: 1.0.0~1230
X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;h=3dc4fcd4fabb9e2bc848c56052a648821d70e3db;p=bertos.git

Import into DevLib


git-svn-id: https://src.develer.com/svnoss/bertos/trunk@11 38d2e660-2303-0410-9eaa-f027e97ec537
---

diff --git a/mware/crc.c b/mware/crc.c
new file mode 100755
index 00000000..7d8d341d
--- /dev/null
+++ b/mware/crc.c
@@ -0,0 +1,70 @@
+/*!
+ * \file
+ * <!--
+ * Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
+ * All rights reserved.
+ * -->
+ *
+ * \brief CRC table and support routines
+ *
+ * \version $Id$
+ * \author Bernardo Innocenti <bernie@develer.com>
+ */
+
+/*
+ * $Log$
+ * Revision 1.1  2004/06/03 08:58:16  bernie
+ * Import into DevLib
+ *
+ */
+
+#include "crc.h"
+
+/*!
+ * crctab calculated by Mark G. Mendel, Network Systems Corporation
+ */
+const uint16_t crc16tab[256] = {
+	0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
+	0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
+	0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
+	0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
+	0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
+	0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
+	0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
+	0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
+	0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
+	0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
+	0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
+	0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
+	0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
+	0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
+	0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
+	0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
+	0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
+	0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
+	0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
+	0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
+	0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
+	0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+	0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
+	0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
+	0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
+	0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
+	0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
+	0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
+	0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
+	0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
+	0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
+	0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
+};
+
+uint16_t crc16(uint16_t crc, const void *buffer, size_t len)
+{
+	const unsigned char *buf = (const unsigned char *)buffer;
+	while(len--)
+		crc = UPDCRC16(*buf++, crc);
+
+	return crc;
+}
+
diff --git a/mware/crc.h b/mware/crc.h
new file mode 100755
index 00000000..ae28e4d3
--- /dev/null
+++ b/mware/crc.h
@@ -0,0 +1,63 @@
+/*!
+ * \file
+ * <!--
+ * Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
+ * All rights reserved.
+ * -->
+ *
+ * \brief Definitions for CRC generator
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ */
+
+/*
+ * $Log$
+ * Revision 1.1  2004/06/03 08:58:16  bernie
+ * Import into DevLib
+ *
+ */
+#ifndef CRC_H
+#define CRC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include <stdint.h> // uint16_t
+#include <stddef.h> // size_t
+
+/* CRC table */
+extern const uint16_t crc16tab[256];
+
+
+/*!
+ * updcrc macro derived from article Copyright (C) 1986 Stephen Satchell.
+ * \note First argument must be in range 0 to 255.
+ * \note Second argument is referenced twice.
+ *
+ * Programmers may incorporate any or all code into their programs,
+ * giving proper credit within the source. Publication of the
+ * source routines is permitted so long as proper credit is given
+ * to Stephen Satchell, Satchell Evaluations and Chuck Forsberg,
+ * Omen Technology.
+ */
+#define UPDCRC16(c, oldcrc) (crc16tab[((oldcrc) >> 8) ^ ((unsigned char)(c))] ^ ((oldcrc) << 8))
+
+/*!
+ * This function implements the CRC 16 calculation on a buffer.
+ *
+ * \param crc  Current CRC16 value.
+ * \param buf  The buffer to perform CRC calculation on.
+ * \param len  The length of the Buffer.
+ *
+ * \return The updated CRC 16 value.
+ */
+extern uint16_t crc16(uint16_t crc, const void *buf, size_t len);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* CRC_H */