tracker/readraw/readsig.c

/*
 * include needed system headers
 */
#include <stdio.h>       /* include standard i/o library */
#include <stdlib.h>      /* include standard library */
#include <string.h>      /* include string library */
#include <unistd.h>      /* include unix standard library */
#include <sys/types.h>   /* */
#include <sys/stat.h>    /* */
#include <fcntl.h>       /* */
#include <errno.h>       /* error simbol definitions */
#include <time.h>        /* system time definitions */
#include <math.h>        /* math library */

void readsig_(float *sig_buf, int *error, int *fd)

{
    int nread;
    int i;
    unsigned short word;
    unsigned short decimals,units;
    unsigned short sig_buf_temp[1024];
    

    *error=0;

/*** read the buffer ***/
    nread=read(*fd, sig_buf_temp, 2*1024);
    if( nread==0 ) {
        printf("readsig: Unexpected end of file %d at %d \n",*fd,nread);
        *error=1;
        return ;
    }
    if ( nread != 2*1024) {
        printf("readsig: Error on reading: nread = %d \n",nread);
        *error=-1;
        return ; 
    }


/*** correct byte ***/ //endianess...
    for(i=0; i<1024; i++) {
        word = sig_buf_temp[i];
        sig_buf_temp[i] = ( (word&0x00ff) << 8 ) | ( (word&0xff00) >> 8 );
    }


    /***interpreta*/
    for(i=0; i<1024; i++) {

        word = sig_buf_temp[i];
        units = ( (word >> 4) & 0x0fff ) ;
        decimals = (word & 0x000f) ;
        sig_buf[i] = (float)units + (float)decimals / 16.;
//      printf("%i %i %i %f \n",i,units,decimals,sig_buf[i]);
    }


//    for( i=0; i<1024; i++) printf("%x \n",sig_buf[i]);//???

    return; 
}
1	kusanagi	1.1	/*
2			* include needed system headers
3			*/
4			#include <stdio.h> /* include standard i/o library */
5			#include <stdlib.h> /* include standard library */
6			#include <string.h> /* include string library */
7			#include <unistd.h> /* include unix standard library */
8			#include <sys/types.h> /* */
9			#include <sys/stat.h> /* */
10			#include <fcntl.h> /* */
11			#include <errno.h> /* error simbol definitions */
12			#include <time.h> /* system time definitions */
13			#include <math.h> /* math library */
14
15			void readsig_(float sig_buf, int error, int *fd)
16
17			{
18			int nread;
19			int i;
20			unsigned short word;
21			unsigned short decimals,units;
22			unsigned short sig_buf_temp[1024];
23
24
25			*error=0;
26
27			/* read the buffer */
28			nread=read(fd, sig_buf_temp, 21024);
29			if( nread==0 ) {
30			printf("readsig: Unexpected end of file %d at %d \n",*fd,nread);
31			*error=1;
32			return ;
33			}
34			if ( nread != 2*1024) {
35			printf("readsig: Error on reading: nread = %d \n",nread);
36			*error=-1;
37			return ;
38			}
39
40
41			/* correct byte */ //endianess...
42			for(i=0; i<1024; i++) {
43			word = sig_buf_temp[i];
44			sig_buf_temp[i] = ( (word&0x00ff) << 8 ) \| ( (word&0xff00) >> 8 );
45			}
46
47
48			/**interpreta/
49			for(i=0; i<1024; i++) {
50
51			word = sig_buf_temp[i];
52			units = ( (word >> 4) & 0x0fff ) ;
53			decimals = (word & 0x000f) ;
54			sig_buf[i] = (float)units + (float)decimals / 16.;
55			// printf("%i %i %i %f \n",i,units,decimals,sig_buf[i]);
56			}
57
58
59
60			// for( i=0; i<1024; i++) printf("%x \n",sig_buf[i]);//???
61
62			return;
63			}