/***************************************************************************## pargpio: library to use parpaort device with 2 D/A . converter            ## can read status pin 13 or pin 15                                          ##.                                                                          ## 		Copyright (C) 2005 Michel Xhaard                            ##                                                                           ## 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.                                       ##                                                                           ## This program is distributed in the hope that it will be useful,           ## but WITHOUT ANY WARRANTY; without even the implied warranty of            ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             ## GNU General Public License for more details.                              ##                                                                           ## You should have received a copy of the GNU General Public License         ## along with this program; if not, write to the Free Software               ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA ##                                                                           ##***************************************************************************/#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <linux/parport.h>#include <linux/ppdev.h> #include <fcntl.h>#include <sys/ioctl.h>#include <sys/mman.h>#include <errno.h>/* paraport 2 channels with D/A converter read signal pin 15 or pin 13 */int openclaimParaport(char *dev){	int fd,i;	fd = open(dev, O_RDWR );        if (fd < 0) {                printf("ERROR: cannot open device %s\n",dev);		return -1;        }	if(ioctl(fd, PPCLAIM) < 0){	printf("ERROR: could not claim parport. Did you load the modules parport_pc, ppdev and parport? Check with /sbin/lsmod\n");	close(fd);	return -1;	}	return(fd);}unsigned char read_portstatus15(int fd){		unsigned char stat =0;	unsigned char on = 0;	int rc;	rc=ioctl(fd, PPRSTATUS, &stat);	on = (stat & 0x08)?1:0 ;	//printf ("status 0x%02X \n",on);	return on;}int closereleaseParaport( int fd){	if(ioctl(fd,PPRELEASE) < 0){	printf("erreur release PartPort \n");	return -1;	}	close(fd);	return 0;}unsigned char read_portstatus13(int fd){		unsigned char stat =0;	unsigned char on = 0;	int rc;	rc=ioctl(fd, PPRSTATUS, &stat);	on = (stat & 0x40)?1:0 ;	//printf ("status 0x%02X \n",on);	return on;}int port_setdata2(int fd,unsigned char val2){	int rc;	struct ppdev_frob_struct frob;		frob.mask = PARPORT_CONTROL_STROBE ;	/* set the strobe line*/			frob.val = PARPORT_CONTROL_STROBE ;// 1;toggle	ioctl(fd,PPFCONTROL,&frob);	rc=ioctl(fd, PPWDATA, &val2);	frob.val = 0;	ioctl(fd,PPFCONTROL,&frob);	return(rc);}int port_setdata1(int fd,unsigned char bitval){	int rc;        struct ppdev_frob_struct frob;	        frob.mask = PARPORT_CONTROL_SELECT;        frob.val= 0;//~PARPORT_CONTROL_SELECT;//0;		ioctl(fd,PPFCONTROL,&frob);	rc = port_setdata2(fd,bitval);        frob.val= PARPORT_CONTROL_SELECT; //8;			ioctl(fd,PPFCONTROL,&frob);	return(rc);}int port_toggleInitbit (int fd){        struct ppdev_frob_struct frob;	static char value = 0;	value = (value)? 0: PARPORT_CONTROL_INIT;        frob.mask = PARPORT_CONTROL_INIT;        frob.val= value;//0;		ioctl(fd,PPFCONTROL,&frob);	return(0);}int port_toggleAutoFeedbit (int fd){        struct ppdev_frob_struct frob;	static char value = 0;	value = (value)? 0: PARPORT_CONTROL_AUTOFD;        frob.mask = PARPORT_CONTROL_AUTOFD;        frob.val= value;		ioctl(fd,PPFCONTROL,&frob);        return(0);}