rm fteeprom/test/fteeprom-prog-bad When the magic command sequence for FT232R was added to libftdi-based fteeprom-prog, a version without this magic sequence was preserved in fteeprom-prog-bad. However, the new minilib version of fteeprom-prog operates without this magic sequence by default (as appropriate for FT2232D, FT2232H etc) and needs to be run with -r option to invoke FT232R-specific mode with the necessary magic. Anyone who needs fteeprom-prog-bad for study or experimentation can find it in freecalypso-hwlab Hg repository where it was originally developed.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>

main(argc, argv)
	char **argv;
{
	unsigned size;
	unsigned n, col;

	if (argc == 1)
		size = 64;
	else if (argc == 2 && !strcmp(argv[1], "-b"))
		size = 128;
	else if (argc == 2 && !strcmp(argv[1], "-B"))
		size = 256;
	else {
		fprintf(stderr, "usage: %s [-b|-B]\n", argv[0]);
		exit(1);
	}
	for (n = 0; n < size; n++) {
		col = n & 7;
		if (col == 0)
			printf("%02X:", n * 2);
		printf(" %04X", 0xFFFF);
		if (col == 7)
			putchar('\n');
	}
	exit(0);
}