Add support for ymodem protocol (loady command).

Patch by Stefano Babic, 29 Mar 2006

include/crc.h

@@ -0,0 +1,101 @@
+//==========================================================================
+//
+//      crc.h
+//
+//      Interface for the CRC algorithms.
+//
+//==========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 2002 Andrew Lunn
+//
+// eCos 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 2 or (at your option) any later version.
+//
+// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license/
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    Andrew Lunn
+// Contributors: Andrew Lunn
+// Date:         2002-08-06
+// Purpose:      
+// Description:  
+//              
+// This code is part of eCos (tm).
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#ifndef _SERVICES_CRC_CRC_H_
+#define _SERVICES_CRC_CRC_H_
+
+#include <linux/types.h>
+
+#ifndef __externC
+# ifdef __cplusplus
+#  define __externC extern "C"
+# else
+#  define __externC extern
+# endif
+#endif
+
+// Compute a CRC, using the POSIX 1003 definition
+extern uint32_t 
+cyg_posix_crc32(unsigned char *s, int len);
+
+// Gary S. Brown's 32 bit CRC
+
+extern uint32_t 
+cyg_crc32(unsigned char *s, int len);
+
+// Gary S. Brown's 32 bit CRC, but accumulate the result from a
+// previous CRC calculation
+
+extern uint32_t 
+cyg_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
+
+// Ethernet FCS Algorithm
+
+extern uint32_t 
+cyg_ether_crc32(unsigned char *s, int len);
+
+// Ethernet FCS algorithm, but accumulate the result from a previous
+// CRC calculation.
+
+extern uint32_t 
+cyg_ether_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
+
+// 16 bit CRC with polynomial x^16+x^12+x^5+1
+
+extern uint16_t cyg_crc16(unsigned char *s, int len);
+
+#endif // _SERVICES_CRC_CRC_H_
+
+
+