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/******************************************************************************
Copyright (c) 2015, Focusrite Audio Engineering Ltd.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of Focusrite Audio Engineering Ltd., nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
// Ported from the original Delphi version.
// CLI parameters for ID, ByteWidth and BaseAddress removed for simplicity
#include <iostream>
#include <fstream>
#include "intelhex.h"
static const int ByteWidth = 32;
static const int ID = 0x0051;
static const unsigned char RESET[] = {0xf0, 0x00, 0x20, 0x29, 0x00, 0x71};
// must match unpacking code in the bootloader, obviously
static void eight_to_seven(unsigned char * Output, const int OOffset,
intelhex::hex_data& Input, const unsigned long IOffset)
{
for (int i = 0; i < 7; ++i)
{
if (!Input.is_set(IOffset + i))
{
// pad unset addresses
Input.set(IOffset + i, 0xff);
}
}
// seven bytes of eight-bit data converted to
// eight bytes of seven-bit data
// render 8-bit words as 16-bit words
Output[OOffset+0] = Input[IOffset+0] >> 1;
Output[OOffset+1] = (Input[IOffset+0] << 6) + (Input[IOffset+1] >> 2);
Output[OOffset+2] = (Input[IOffset+1] << 5) + (Input[IOffset+2] >> 3);
Output[OOffset+3] = (Input[IOffset+2] << 4) + (Input[IOffset+3] >> 4);
Output[OOffset+4] = (Input[IOffset+3] << 3) + (Input[IOffset+4] >> 5);
Output[OOffset+5] = (Input[IOffset+4] << 2) + (Input[IOffset+5] >> 6);
Output[OOffset+6] = (Input[IOffset+5] << 1) + (Input[IOffset+6] >> 7);
Output[OOffset+7] = (Input[IOffset+6]);
for (int i = 0; i < 8; ++i)
{
Output[OOffset+i] &= 0x7f;
}
}
static void write_block(intelhex::hex_data& data, std::ofstream& ofs, const unsigned long addr, const unsigned char type)
{
// packet header
ofs.write(reinterpret_cast<const char*>(RESET), 5);
ofs.put(type);
int incount = 0;
int outcount = 0;
int outn = 1 + (ByteWidth * 8) / 7;
// payload
unsigned char payload[41];
while (incount < ByteWidth)
{
eight_to_seven(payload, outcount, data, addr+incount);
incount += 7;
outcount += 8;
}
ofs.write(reinterpret_cast<const char*>(payload), outn);
ofs.put(0xf7);
}
static void write_header(intelhex::hex_data& data, std::ofstream& ofs, size_t BaseAddress)
{
// human-readable version number & header block
ofs.write(reinterpret_cast<const char*>(RESET), 6);
ofs.put(ID >> 8);
ofs.put(ID & 0x7f);
ofs.put(data[BaseAddress + 0x102] >> 4);
ofs.put(data[BaseAddress + 0x102] & 0x0f);
ofs.put(data[BaseAddress + 0x101] >> 4);
ofs.put(data[BaseAddress + 0x101] & 0x0f);
ofs.put(data[BaseAddress + 0x100] >> 4);
ofs.put(data[BaseAddress + 0x100] & 0x0f);
ofs.put(0xf7);
}
static void write_checksum(intelhex::hex_data& data, std::ofstream& ofs)
{
// device doesn't respect the checksum, but we still need this block!
ofs.write(reinterpret_cast<const char*>(RESET), 5);
unsigned char payload[19];
const char *FIRMWARE = "Firmware";
payload[0] = 0x76;
payload[1] = 0x00;
for (int i = 0; i < 8; ++i)
{
payload[i+2] = FIRMWARE[i];
}
payload[10] = 0x00;
payload[11] = 0x00;
payload[12] = 0x00;
payload[13] = 0x00;
payload[14] = 0x00;
payload[15] = 0x00;
payload[16] = 0x00;
payload[17] = 0x00;
payload[18] = 0xf7;
ofs.write(reinterpret_cast<const char*>(payload), 19);
}
int main(int argc, char *argv[])
{
std::cout << "converting " << argv[1] << " to sysex file: " << argv[2] << std::endl;
// read the hex file input
intelhex::hex_data data;
data.load(argv[1]);
size_t BaseAddress = data.min_address();
size_t MaxAddress = data.max_address();
std::cout << "max addr: " << std::hex << data.max_address() << " min_addr: " << std::hex << data.min_address() << std::endl;
// create output file
std::ofstream ofs(argv[2] , std::ios::out | std::ios::binary);
if( !ofs )
return -1;
write_header(data, ofs, BaseAddress);
// payload blocks...
unsigned long i = BaseAddress + ByteWidth;
while (i < MaxAddress)
{
write_block(data, ofs, i, 0x72);
i += ByteWidth;
}
write_block(data, ofs, BaseAddress, 0x73);
// footer/checksum block
write_checksum(data, ofs);
ofs.close();
return 0;
}
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