Hello List,
I just made the attached sample application using the C-API from CVS.
It is generating X-events from two buttons connected to a DS2413. This may
also work with similar IO-devices.
I intend to use this for control of OO-Presenter in a talk about owfs I
will give to our local Linux User Group next week :)
Sven
--
Threading is a performance hack.
(The Art of Unix Programming by Eric S. Raymond)
/me is [EMAIL PROTECTED], http://sven.gegg.us/ on the Web
/* xevent.c
generate xevents from two buttons
connected via 1-wire BUS to a DS2413 device
(c) 2005 Sven Geggus <[EMAIL PROTECTED]>
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, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <X11/extensions/XTest.h>
#include <owcapi.h>
#define BUS "localhost:4711"
#define PIOID "3A.A13100000000"
#define EVENTA "Left"
#define EVENTB "Right"
struct keymodlist_t {
char *name;
Mask mask;
};
static struct keymodlist_t keymodlist[]=
{
{"SHIFT", ShiftMask},
{"CAPS", LockMask},
{"CTRL", ControlMask},
{"ALT", Mod1Mask},{"META", Mod1Mask},
{"NUMLOCK", Mod2Mask},
{"MOD3", Mod3Mask}, /* I don't have a clue what key maps to this. */
{"MOD4", Mod4Mask}, /* I don't have a clue what key maps to this. */
{"SCRLOCK", Mod5Mask},
{NULL,0},
};
const char *key_delimiter ="-";
Display *dpy;
Window root,w;
XEvent xev;
void make_key(char *keyname,int x, int y,XKeyEvent *xev) {
char *part, *part2;
struct keymodlist_t *kmlptr;
part2=malloc(128);
xev->type = KeyPress;
xev->display=dpy;
xev->root=root;
xev->subwindow = None;
xev->x=x; xev->y=y;
xev->x_root=1; xev->y_root=1;
xev->same_screen = True;
xev->state=0;
while ((part=strsep(&keyname, key_delimiter)))
{
part2=strncpy(part2,part,128);
kmlptr=keymodlist;
while (kmlptr->name)
{
if (!strcasecmp(kmlptr->name, part))
xev->state|=kmlptr->mask;
kmlptr++;
}
}
xev->keycode=XKeysymToKeycode(dpy,XStringToKeysym(part2));
free(part2);
return ;
}
void sendkey(char *keyname,int x,int y,Window w,Window s,int edge) {
make_key(keyname ,x,y,(XKeyEvent*)&xev);
xev.xkey.window=w;
xev.xkey.subwindow=s;
XTestFakeKeyEvent(dpy, xev.xkey.keycode, edge, 0);
XSync(dpy,True);
return;
}
void die(const char *s) { perror(s); exit(EXIT_FAILURE); }
int main() {
char *s;
size_t n;
int ioA,ioB,cioA,cioB;
struct timeval timeout;
dpy=XOpenDisplay(NULL);
if(dpy==NULL) {
fprintf(stderr,"Can't open DISPLAY.\n");
exit(1);
}
if(OW_init(BUS) !=0) die("OW_init");
timeout.tv_sec=0;
timeout.tv_usec=100000;
ioA=0;
ioB=0;
while (1) {
OW_get("/uncached/"PIOID"/PIO.ALL",&s,&n);
cioA=s[0]-48;
cioB=s[2]-48;
/* positive edge Button A */
if ((ioA==0)&&(cioA==1)) {
sendkey(EVENTA,1,1,w,0,True);
}
/* negative edge Button A */
if ((ioA==1)&&(cioA==0)) {
sendkey(EVENTA,1,1,w,0,False);
}
/* positive edge Button B */
if ((ioB==0)&&(cioB==1)) {
sendkey(EVENTB,1,1,w,0,True);
}
/* negative edge Button B */
if ((ioB==1)&&(cioB==0)) {
sendkey(EVENTB,1,1,w,0,False);
}
ioA=cioA;
ioB=cioB;
select(0,NULL, NULL, NULL, &timeout);
timeout.tv_sec=0;
timeout.tv_usec=100000;
}
OW_finish();
exit(EXIT_SUCCESS);
}
INCLUDES = -I/opt/owfs/include/
CFLAGS = -g -Wall -W $(INCLUDES)
LDLIBS = -lX11 -lXtst -lowcapi -L/usr/X11R6/lib -L/opt/owfs/lib
SRC = xevent.c
OBJ = $(SRC:%.c=%.o)
xevent:$(OBJ)
$(CC) -o $@ $(CFLAGS) $(OBJ) $(LDLIBS)
clean:
rm -f *.o *~ xevent
