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/***************************************************************************
master_read_to_file.c
-------------------
Example program which uses gpib c library. I use this with
slave_write_from_file in order to test read/write speed between two boards.
Unlike master_write_from_file, we don't use ibrdf() here because I want
to separate gpib transfer speed and disk io speed in my benchmarking.
copyright : (C) 2003 by Frank Mori Hess
email : fmhess@users.sourceforge.net
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include "gpib/ib.h"
char *myProg;
void usage(int brief) {
fprintf(stderr,"Usage: %s [-h] [-b <board index>]"
" [-d <device pad>] <file name>\n", myProg);
if (brief) exit(1);
fprintf(stderr," Default <board index> is 0\n");
fprintf(stderr," Default <device pad> is 1\n");
exit(0);
}
int main( int argc, char *argv[] )
{
int dev;
int board_index = 0;
int pad = 1;
int sad = 0;
int send_eoi = 1;
int eos_mode = 0;
char *file_path;
int status;
struct timeval start_time, end_time;
float elapsed_time;
FILE *filep;
uint8_t *buffer;
static const unsigned long buffer_length = 10000000;
int c,unaddr;
myProg = argv[0];
while ((c = getopt (argc, argv, "b:d:h")) != -1)
{
switch (c)
{
case 'b': board_index = atoi(optarg); break;
case 'd': pad = atoi(optarg); break;
case 'h': usage(0); break;
default: usage(1);
}
}
if (optind == argc)
{
fprintf( stderr, "Must provide file path as argument\n" );
usage(0);
}
file_path = argv[ optind ];
filep = fopen( file_path, "w" );
if( filep == NULL )
{
perror( "fopen()");
return -1;
}
buffer = malloc( buffer_length );
if( buffer == NULL )
{
perror( "malloc()");
return -1;
}
dev = ibdev( board_index, pad, sad, TNONE, send_eoi, eos_mode );
if( dev < 0 )
{
fprintf( stderr, "ibdev() failed\n" );
fprintf( stderr, "%s\n", gpib_error_string( ThreadIberr() ) );
return -1;
}
if (ERR & ibconfig(dev,IbcUnAddr,1))
{
fprintf(stderr, "Could not set automatic unaddress mode\n");
}
ibask(dev,IbaUnAddr,&unaddr);
printf( "Device online: board index=%i, pad=%i, sad=%i, unaddr=%i\n"
"\tfile path=%s\n", board_index, pad, sad, unaddr, file_path );
gettimeofday( &start_time, NULL );
status = ibrd( dev, buffer, buffer_length );
if( status & ERR )
{
fprintf( stderr, "ibrd() failed\n" );
fprintf( stderr, "%s\n", gpib_error_string( ThreadIberr() ) );
return -1;
}
gettimeofday( &end_time, NULL );
elapsed_time = end_time.tv_sec - start_time.tv_sec +
( end_time.tv_usec - start_time.tv_usec ) / 1e6;
printf( "Transferred %lu bytes in %g seconds: %g bytes/sec\n",
ThreadIbcntl(), elapsed_time, ThreadIbcntl() / elapsed_time );
if( fwrite( buffer, 1, ThreadIbcntl(), filep ) != ThreadIbcntl() )
{
perror( "fwrite()" );
return -1;
}
fclose( filep );
free( buffer );
return 0;
}
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