pattern.c

来自「rt 7520采集卡 linux驱动源代码」· C语言 代码 · 共 63 行

/*
	FILE NAME: pattern.c

	FILE DESCRIPTION:

		Reads digital data from a file and writes it to digital I/O
		port 0.  The data file name is passed in as the second command
		line argument.

	PROJECT NAME: Linux DM7520 Driver, Library, and Example Programs

	PROJECT VERSION: (Defined in README.TXT)

	Copyright 2004 RTD Embedded Technologies, Inc.  All Rights Reserved.
*/

#include <stdio.h>	//printf
#include <unistd.h>	//usleep
#include <errno.h>	//errno
#include <stdlib.h>	//exit
#include "dm7520_library.h"

int main(int argc, char * argv[])
{
 FILE * devfile;
 FILE * infile;
 char buffer [4096];
 char c;
 int cnt,i;

 if (argc<2) {fprintf(stderr,"Usage: %s <devicename> patternfile\n",argv[0]);exit(1);}

 if (NULL==(devfile=fopen(argv[1],"r"))) 
   {
    fprintf(stderr,"Cannot open device, errno=%d\n",errno);
    perror("Error is");
    exit(2);
   }
 if (NULL==(infile=fopen(argv[2],"r"))) 
   {
    perror("Cannot open inputfile:");
    exit(2);
   }


 InitBoard7520(fileno(devfile));

 SetDIO0Direction7520(fileno(devfile),255);
 
 while ((cnt=fread(buffer,sizeof(char),4096,infile))>0)
   {
    for (i=0;i<cnt;i++)
      {
       c=buffer[i];
       WriteDIO07520(fileno(devfile),(int)c); 
       usleep(100000);
      }
   }
 
 fclose(infile);
 return(0); 
}