fpgafs/app/fifo_shift.c

/* *****************************************************************
 * (C) Copyright 2007 Benjamin Krill <ben@codiert.org>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
 * MA 02110-1301 USA
 * *****************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <libfpga.h>

int
main(int argv, char **argc)
{
	int fd, sta, rnd, i;
	char *c, buf[4];

	if ((fd = open("tdat", O_RDONLY, 0)) == -1 ) {
		printf("ERROR-1: %s\n", strerror(errno));
		return -1;
	}

	if (fpgafs_create_context(fd, "dbg") == -1) {
		printf("ERROR-2: Cannot create fpgafs context\n");
		close(fd);
		return -1;
	}

//	while (fpgafs_get_stat() < 0x10) {
	for(i=0; i < 10; i++) {
		rnd = rand();
		c = (char *)&rnd;
		printf("write data: %x\n",c[0], c[1], c[2], c[3]);
		if ((sta=fpgafs_send_data(&c[0], 4)) != 4) {
			printf("ERROR-3: Cannot send specified length (%d)\n", sta);
			return -1;
		}

		if ((sta=fpgafs_recv_data(&c[0], 4)) != 4) {
			printf("ERROR-3: Cannot send specified length (%d)\n", sta);
			return -1;
		}
		printf("read data: %x\n",buf[0], buf[1], buf[2], buf[3]);
	}
	return 0;
}