//-------------------------------------------------------------------
//	recvajay.cpp
//
//	This program is for testing our 'ajfschar.c' device-driver's
//	'read()' method when receiving data via the 'NET20DC' cable.
//
//		to compile:  $ g++ recvajay.cpp -o recvajay
//		to execute:  $ ./recvajay
//
//	NOTE: Installing our 'ajfschar.c' device-driver is required.
//
//	programmer: ALLAN CRUSE
//	written on: 30 MAY 2010
//-------------------------------------------------------------------

#include <stdio.h>	// for printf(), perror() 
#include <fcntl.h>	// for open() 
#include <stdlib.h>	// for exit() 
#include <unistd.h>	// for read() 

char devname[] = "/dev/ajay";

char	rxbuf[ 41000 ];

int main( int argc, char **argv )
{
	// open the device-file for reading
	int	fd = open( devname, O_RDONLY );
	if ( fd < 0 ) { perror( devname ); exit(1); }
	
	// read the data received via the NET20DC cable
	int	rxbytes = read( fd, rxbuf, sizeof( rxbuf ) ); 
	if ( rxbytes < 0 ) { perror( "read" ); exit(1); }

	// display the data received via the NET20DC cable
	printf( "\n%s\n", rxbuf );

	// report the amount of data that our driver has transferred
	printf( "\n Read %d bytes from \'%s\' \n", rxbytes, devname );
}