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//-----------------------------------------------------------------------------
//
// PICSTART Plus programming interface
//
//-----------------------------------------------------------------------------
//
// Cosmodog, Ltd.
// 415 West Huron Street
// Chicago, IL 60610
// http://www.cosmodog.com
//
// Maintained at
// http://home.pacbell.net/theposts/picmicro
//
//-----------------------------------------------------------------------------
//
// this interface to the PICSTART Plus programmer is provided in an effort
// to make the PICSTART (and thus, the PIC family of microcontrollers) useful
// and accessible across multiple platforms, not just one particularly well-
// known, unstable one.
//
//-----------------------------------------------------------------------------
//
// Copyright (C) 1999-2002 Cosmodog, Ltd.
// Copyright (c) 2004 Jeffery L. Post
//
// Please send bug reports for version 0.6.0 or higher to
// j_post <AT> pacbell <DOT> net.
//
// 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.
//
//-----------------------------------------------------------------------------
//
// to do:
// motorola S-records should be supported, too
//
//-----------------------------------------------------------------------------
#include <stdio.h>
#ifdef WIN32
#include <windows.h>
#define bool int
#define true TRUE
#define false FALSE
#endif
#include "record.h"
#include "picdev.h"
#define DATARECORD 0
#define ENDRECORD 1
#define EXTADDRESS 4
#define REC_LENGTH 16
//-----------------------------------------------------------------------------
// write an address record to the output file
static void DumpIntelHexExtendedAddressRecord(FILE *theFile, unsigned int address)
{
int checksum = 2 + EXTADDRESS + address + (address >> 8);
fprintf(theFile, ":%02X%04X%02X%04X%02X\n",
2, 0, EXTADDRESS, address, (-checksum) & 0xff);
}
//-----------------------------------------------------------------------------
// create a line of intel hex output to theFile
// theFile -- file pointer to the output file
// address -- the address of the record
// theBytes -- pointer to the actual data
// numBytes -- number of bytes in the record
static void DumpIntelHexLine(FILE *theFile, unsigned int address, unsigned char *theBytes, int numBytes, unsigned short int blankData)
{
int i, checkSum;
unsigned short int data;
bool skip = true;
if (blankData) // writing program data, not eeprom data
{
for (i=0; i<numBytes; i += 2) // check for valid data in program space
{
data = (theBytes[i + 1] << 8) | (theBytes[i] & 0xff);
if (data != blankData) // non-blank data found, do not skip this record
{
skip = false;
break;
}
}
}
else
skip = false; // always output lines for eeprom data
// If this line of program memory contains only blank values, do not write it.
if (!skip)
{
fprintf(theFile, ":%02X%04X%02X", numBytes, address, DATARECORD); // write the stub (colon, length of record, address, record type)
checkSum = 0;
for (i=0; i<numBytes; i++)
{
checkSum += theBytes[i];
fprintf(theFile, "%02X", theBytes[i]); // write a data byte as ASCII
}
checkSum += (address & 0xFF) + (address >> 8) + numBytes + DATARECORD;
fprintf(theFile, "%02X\n", (-checkSum) & 0xFF); // add the checksum and a line terminator
}
}
//-----------------------------------------------------------------------------
// Dump an end of file record marker out to theFile
static void DumpIntelHexEOR(FILE *theFile)
{
fprintf(theFile, ":00000001FF\n"); // provide end record
}
//-----------------------------------------------------------------------------
// write a hex record to the output file
// DEBUG should be able to specify intel hex or motorola S
void WriteHexRecord(FILE *outFile, unsigned char *theBuffer, unsigned int address, unsigned short int size, unsigned short int blankData)
{
int bytesLeft, numBytes;
unsigned int extendedAddress;
bytesLeft = size;
extendedAddress = address & 0xffff0000;
DumpIntelHexExtendedAddressRecord(outFile, extendedAddress >> 16);
while (bytesLeft)
{
numBytes = bytesLeft > REC_LENGTH ? REC_LENGTH : bytesLeft;
if (((address + numBytes) & 0xffff0000) != extendedAddress)
numBytes = extendedAddress - address;
DumpIntelHexLine(outFile, address, &theBuffer[size - bytesLeft], numBytes, blankData);
address += numBytes;
bytesLeft -= numBytes;
if (bytesLeft && ((address & 0xffff0000) != extendedAddress))
{
extendedAddress = address & 0xffff0000;
DumpIntelHexExtendedAddressRecord(outFile, extendedAddress >> 16);
}
}
DumpIntelHexEOR(outFile);
}
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