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#include <iostream>
#include <fstream>
// Ported from the original Delphi version.
// CLI parameters for ID, ByteWidth and BaseAddress removed for simplicity
#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 + 0x132] >> 4);
ofs.put(data[BaseAddress + 0x132] & 0x0f);
ofs.put(data[BaseAddress + 0x131] >> 4);
ofs.put(data[BaseAddress + 0x131] & 0x0f);
ofs.put(data[BaseAddress + 0x130] >> 4);
ofs.put(data[BaseAddress + 0x130] & 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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