user_inp.c

rt 7520采集卡 linux驱动源代码

/*
	FILE NAME: user_inp.c

	FILE DESCRIPTION:

		Demonstrates usage of User Input 0 and User Input 1.

		The following connections must be made before running this
		program:
			* CN2 pin 44 ==> CN2 pin 54
			* CN2 pin 46 ==> CN2 pin 53

	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 <stdlib.h>	//exit
#include <errno.h>	//errno
#include "dm7520_library.h"



int main(int argc, char * argv[])
{
 FILE * infile;
 int devno;	//device handler
 int errors = 0;
 int i;
 uint16_t userInp;


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

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

 devno = fileno(infile);		// get device handler

 InitBoard7520(devno);

 SetDIO1Direction7520(devno, 1);	//set port1 to output
 

 for (i=0; i<4; i++) {
	WriteDIO17520(devno,i);
	ReadUserInput7520(devno, &userInp);
	if (i != userInp) {
		printf("Error: written to port1=%d, Read from user input=%d\n", i, userInp);
		errors++;
	}
 }

 printf("Test done. Number of errors=%d\n", errors);
 fclose(infile);
 return(0);
}