ben-blinkenlights/ubbctl/ubbctl.c

/*
 * ubbctl.c - Set and query UBB signals
 *
 * Written 2013 by Werner Almesberger
 * Copyright 2013 Werner Almesberger
 *
 * 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.
 */

#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

#include <ubb/ubb.h>


static struct pin {
	const char *name;
	uint32_t mask;
} pins[] = {
	{ "nPWR",	UBB_nPWR },
	{ "DAT2",	UBB_DAT2 },
	{ "DAT3",	UBB_DAT3 },
	{ "CMD",	UBB_CMD },
	{ "CLK",	UBB_CLK },
	{ "DAT0",	UBB_DAT0 },
	{ "DAT1",	UBB_DAT1 },
	{ NULL }
};


static void show_pins(void)
{
	const struct pin *p;
	int pin, set;

	for (p = pins; p->name; p++) {
		printf("%s%s=", p == pins ? "" : " ", p->name);
		pin = PIN(p->mask);
		if (PDFUN & p->mask) {
			printf("FN");
		} else if (PDDIR & p->mask) {
			set = !!(PDDAT & p->mask);
			if (pin != set)
				printf("%d!", set);
			
		} else {
			putchar(PDPULL & p->mask ? 'Z' : 'R');
		}
		printf("%d", pin);
	}
	printf("\n");
}


static void usage(const char *name)
{
        fprintf(stderr,
"usage: %s\n"
    , name);
	exit(1);
}

int main(int argc, char **argv)
{
	int c;

	while ((c = getopt(argc, argv, "")) != EOF)
		switch (c) {
		default:
			usage(*argv);
		}

	switch (argc-optind) {
	case 0:
		break;
	default:
		usage(*argv);
	}

	ubb_open(UBB_ALL);
	show_pins();
	return 0;
}