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//
// srecord - manipulate eprom load files
// Copyright (C) 2012 Peter Miller
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 3 of the License, or (at your
// option) any later version.
//
// This program 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 Lesser General Public License
// for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
//
// From: Hendrik Beijeman <hbeyeman@gmail.com>
// To: pmiller@opensource.org.au
// Subject: Re: patch for srecord 1.59
// Date: Sat, 05 May 2012 06:26:02 +0200 (05/05/12 14:26:02)
//
// I hereby formally assign all copyright to the author of srecord,
// Peter Miller.
//
#ifndef SRECORD_STM32_H
#define SRECORD_STM32_H
#include <stddef.h>
namespace srecord
{
/**
* The stm32 class is used to represent the running value of a 32-bit
* cyclic redundancy check of series of bytes, for the STM32 series of
* microcontrollers.
* http://www.st.com/
*/
class stm32
{
public:
/**
* The destructor.
*/
virtual ~stm32();
/**
* The default constructor.
*/
stm32();
/**
* The copy constructor.
*/
stm32(const stm32 &);
/**
* The assignment operator.
*/
stm32 &operator=(const stm32 &);
/**
* The get method is used to obtain the running value of the cyclic
* redundancy check.
*/
unsigned long get(void) const;
/**
* The next method is used to advance the state by one byte.
*/
void next(unsigned char c);
/**
* The nextbuf method is used to advance the state by a series of bytes.
*/
void nextbuf(const void *data, size_t data_size);
/**
* Word size on the STM32
*/
static const size_t wordsize = 4;
private:
/**
* Run the generator on the filled buffer. The generator assumes
* the incomming bytestream is in little-endian order, which is safe
* considering this is for the STM32F series MPUs.
*/
void generator(void);
/**
* The state instance variable is used to remember the running
* value of the 32-bit cyclic redundancy check.
*/
unsigned long state;
/**
* Current counter of the byte feeding
*/
size_t cnt;
/**
* Buffer the incomming stream to build a word to feed to the
* CRC generator.
*/
unsigned char buf[wordsize];
};
};
// vim: set ts=8 sw=4 et :
#endif // SRECORD_CRC32_H
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