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bitfile.h
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bitfile.h
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/* Xilinx .bit file parser
Copyright (C) 2004 Andrew Rogers
This program 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 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef BITFILE_H
#define BITFILE_H
#include <stdio.h>
#include <string>
#include <stdint.h>
// ----------------------Xilinx .bit file format---------------------------
// 00000000: 00 09 0f f0 0f f0 0f f0 0f f0 00 00 01 61 00 0a *.............a..*
// 00000010: 78 66 6f 72 6d 2e 6e 63 64 00 62 00 0c 76 31 30 *xform.ncd.b..v10*
// 00000020: 30 30 65 66 67 38 36 30 00 63 00 0b 32 30 30 31 *00efg860.c..2001*
// 00000030: 2f 30 38 2f 31 30 00 64 00 09 30 36 3a 35 35 3a */08/10.d..06:55:*
// 00000040: 30 34 00 65 00 0c 28 18 ff ff ff ff aa 99 55 66 *04.e..(.......Uf*
/*
Field 1
2 bytes length 0x0009 (big endian)
9 bytes some sort of header
2 bytes length 0x0001
Field 2
1 byte key 0x61 (The letter "a")
2 bytes length 0x000a (value depends on file name length)
10 bytes string design name "xform.ncd" (including a trailing 0x00)
Field 3
1 byte key 0x62 (The letter "b")
2 bytes length 0x000c (value depends on part name length)
12 bytes string part name "v1000efg860" (including a trailing 0x00)
Field 4
1 byte key 0x63 (The letter "c")
2 bytes length 0x000b
11 bytes string date "2001/08/10" (including a trailing 0x00)
Field 5
1 byte key 0x64 (The letter "d")
2 bytes length 0x0009
9 bytes string time "06:55:04" (including a trailing 0x00)
Field 6
1 byte key 0x65 (The letter "e")
4 bytes length 0x000c9090 (value depends on device type,
and maybe design details)
8233440 bytes raw bit stream starting with 0xffffffff aa995566 sync
word. */
// Modified to reflect parsing - Andrew Rogers
// Reference: http://www.fpga-faq.com/FAQ_Pages/0026_Tell_me_about_bit_files.htm
//--------------------------------------------------------------------------------
typedef unsigned char byte;
enum FILE_STYLE { STYLE_BIT, STYLE_BIN, STYLE_HEX, STYLE_HEX_RAW,
STYLE_MCS, STYLE_IHEX , STYLE_JEDEC, STYLE_AUTO};
class BitFile
{
private:
std::string ncdFilename; // key 'a'
std::string partName; // key 'b'
std::string date; // key 'c'
std::string dtime; // key 'd'
uint32_t length; // The length of the byte data that follows, multiply by 8 to get bitstream length.
byte *buffer; // Each byte is reversed, Xilinx does things MSB first and JTAG does things LSB first!
std::string filename;
bool Error;
std::string errorStr;
FILE *logfile;
unsigned int offset;
unsigned int rlength; /* if != 0 length of data to read/verify*/
private:
void error(const std::string &str);
void readField(std::string &field, FILE *fp);
void processData(FILE *fp);
int readBitfile(FILE *fp);
int readBIN(FILE *fp);
int readHEXRAW(FILE *fp);
int readMCSfile(FILE *fp);
unsigned char checksum(char * buf);
public:
BitFile();
~BitFile();
public:
void append(uint32_t val, unsigned cnt);
void append(char const *file);
int readFile(FILE *fp, FILE_STYLE in_style);
public:
// Set offset of requested operation in bytes.
inline void setOffset(unsigned int of) { offset = of; }
// Return offset of requested operation in bytes.
inline unsigned int getOffset(void) { return offset; }
// Set length of requested operation in bytes.
inline void setRLength(unsigned int lt) { rlength = lt; }
// Return length of requested operation in bytes.
inline unsigned int getRLength(void) { return rlength; }
// Return pointer to data buffer.
inline byte *getData() { return buffer; }
// Return length of bitfile in bits.
inline uint32_t getLength() { return length*8; }
inline const char *getError(){
if(!Error)return("");
Error=false;
return errorStr.c_str();
}
inline const char *getNCDFilename(){return ncdFilename.c_str();}
inline const char *getPartName(){return partName.c_str();}
inline const char *getDate(){return date.c_str();}
inline const char *getTime(){return dtime.c_str();}
void setNCDFields(const char * partname);
void setLength(unsigned int bit_count);
uint32_t saveAs(FILE_STYLE style, const char *device, FILE *fp);
int get_bit(unsigned int idx);
void set_bit(unsigned int idx, int blow);
static const char * styleToString(FILE_STYLE style);
static int styleFromString(const char *stylestr, FILE_STYLE *style);
};
#endif //BITFILE_H