hd.c

rt 7520采集卡 linux驱动源代码

/*
	FILE NAME: hd.c

	FILE DESCRIPTION:
	
		Demonstrates how to use the high speed digital input.  Samples
		are read into a buffer and then displayed on the screen.

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

#include "dm7520_library.h"

#define BUFSIZE 100

int main(int argc, char * argv[])
{
 FILE * infile;
 int16_t buffer [BUFSIZE];
 int cnt,i;
 uint16_t fifostat;
 int devno;		//device handler
 int ret;
 int errorCode=0;
 uint8_t	fifo_full;



 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);     // init the board

 SetUtc0Clock7520 (devno, CUTC0_8MHZ);
 Set8254Mode7520(devno, TC_UTC0, M8254_SQUARE_WAVE ) ;
 SetUtc0Gate7520 (devno, GUTC0_NOT_GATED );
  
 SetHdinStart7520 ( devno, 2) ;	//get samples on HSDIO on user TC0


 GetFifoStatus7520(devno, &fifostat);
 printf("\nFIFO status: %04X.\n",fifostat);

 ret = SetReadChannel7520(devno, DM7520_READ_HD);
 if (ret) printf("Error setting read channel \n");

 ClearDinFifo7520(devno);
 Set8254Divisor7520 (devno, TC_UTC0, 8000000L/10000 ); //set TC0 to 10 kHz
// StartHdin7520(devno);



 cnt=ReadData7520(devno, buffer,BUFSIZE);

 printf("got data\n");
 if (cnt !=BUFSIZE) {
	 GetErrorCode7520(devno, &errorCode);
	 printf("ERROR while reading data read byte = %d\nError code=%d\n", cnt, errorCode);
	 ClearErrorCode7520(devno);
 }

 printf("read %d samples\n", cnt);

 printf("Raw samples:");
 for (i=0;i<(cnt);i++)
   {
    if (0==i%8) printf("\n");
    printf("%5d ", buffer[i]&0xFF);
   }
 printf("\n");

//sleep(1);
 GetFifoStatus7520(devno, &fifostat);
 printf("\nFIFO status: %04X.\n",fifostat);


 IsDINFifoFull7520(devno, &fifo_full);
    if (fifo_full) printf ("DinFifo full\n");



 fclose(infile);
 return(0);
}