monitor.c

来自「fsmlabs的real time linux的内核」· C语言 代码 · 共 44 行

/*
 * (C) Finite State Machine Labs Inc. 1997-2000 <[e-mail]>
 *
 * Released under the terms of GPL 2.
 * Open RTLinux makes use of a patented process described in
 * US Patent 5,995,745. Use of this process is governed
 * by the Open RTLinux Patent License which can be obtained from
 * www.fsmlabs.com/PATENT or by sending email to
 * [e-mail]
 */

#include <stdio.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <rtl_fifo.h>
#include "common.h"



int main()
{
	int fd0;
	int n;
	struct sample samp;
	
	if ((fd0 = open("/dev/rtf0", O_RDONLY)) < 0) {
		fprintf(stderr, "Error opening /dev/rtf0\n");
		exit(1);
	}


	while (1) {
		n = read(fd0, &samp, sizeof(samp));
		printf("min: %8d, max: %8d\n", (int) samp.min, (int) samp.max);
		fflush(stdout);
	}

	return 0;
}