# To subscribers of the xforms list from Serge B Bromow <serge@omensys.com> :
OS = SCO OSR5
XF = v.88
APP = Simple test to read a serial touch screen controller. Callback is
called when
touch screen is touched.
FORM = Has 2 buttons. 1 to test xforms(Ok), second to exit
program(Exit).
RESULT = Application starts and callback is called, even before
data is available for reading on the port. When the touch screen is
touched a memory fault occurs (no output to STDOUT).
Any thoughts!
--------------------------------------------------
#include "forms.h"
#include "cur.h"
#include<standard.h>
FD_cur *fd_cur;
long l = 0;
int main(int argc, char *argv[])
{
FL_IO_CALLBACK cxb();
int fd;
/* Open serial device for reading */
if( (fd = open("/dev/srs011", READ)) == FAIL ) {
printf("can't open touch screen\n");
exit(PASS);
}
fl_initialize(&argc, argv, 0, 0, 0);
fd_cur = create_form_cur();
fl_add_io_callback(fd, FL_READ, cxb(), &l);
/* show the first form */
fl_show_form(fd_cur->cur,FL_PLACE_CENTERFREE,FL_FULLBORDER,"cur");
fl_do_forms();
return 0;
}
FL_IO_CALLBACK cxb( int fd, long *data)
{
char c;
/* Show Entry to Callback */
printf("touched, data = %ld\n", *data);
/* Empty Queu */
while( rdchk( fd ) > NULL ) {
read(fd, &c, 512);
}
}
-----------------------------------------------------
Thanks for any help you can provide.
Serge
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