/*
 * This module implements a function for writing out the same Intel HEX
 * format as used by cp210x-program-1.0, the Python-language tool from 2014.
 */

#include <sys/types.h>
#include <string.h>
#include <strings.h>
#include <stdio.h>
#include <stdlib.h>
#include "cp210x_defs.h"

void
intel_hex_out(eeprom, outf)
	u_char *eeprom;
	FILE *outf;
{
	unsigned linecnt, bytecnt;
	unsigned addr;
	u_char *sp;
	u_char record[21], *dp, csum;

	sp = eeprom;
	addr = EEPROM_START_ADDR;
	for (linecnt = 0; linecnt < 64; linecnt++) {
		dp = record;
		*dp++ = 0x10;
		*dp++ = addr >> 8;
		*dp++ = addr;
		*dp++ = 0x00;
		for (bytecnt = 0; bytecnt < 16; bytecnt++)
			*dp++ = *sp++;
		csum = 0;
		for (bytecnt = 0; bytecnt < 20; bytecnt++)
			csum += record[bytecnt];
		csum = 0x100 - csum;
		record[20] = csum;
		putc(':', outf);
		for (bytecnt = 0; bytecnt < 21; bytecnt++)
			fprintf(outf, "%02X", record[bytecnt]);
		putc('\n', outf);
		addr += 16;
	}
	fputs(":00000001FF\n", outf);
}