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/*
simple test program for joystick driver
usage: js 0 (to test first joystick)
usage: js 1 (to test second joystick)
*/
#include <linux/joystick.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
int main (int argc, char **argv)
{
int fd, status;
char *fname;
struct JS_DATA_TYPE js;
/* should be one argument, and it should be "0" or "1" */
if (argc != 2 || (strcmp (argv[1], "0") && strcmp (argv[1], "1"))) {
fprintf (stderr, "usage: js 0|1\n");
exit (1);
}
/* pick appropriate device file */
if (!strcmp (argv[1], "0"))
fname = "/dev/js0";
else if (!strcmp (argv[1], "1"))
fname = "/dev/js1";
else
fname = NULL;
/* open device file */
fd = open (fname, O_RDONLY);
if (fd < 0) {
perror ("js");
exit (1);
}
printf ("Joystick test program (interrupt to exit)\n");
while (1) {
status = read (fd, &js, JS_RETURN);
if (status != JS_RETURN) {
perror ("js");
exit (1);
}
fprintf (stdout, "button 0: %s button 1: %s X position: %4d Y position: %4d\r",
(js.buttons & 1) ? "on " : "off",
(js.buttons & 2) ? "on " : "off",
js.x,
js.y);
fflush (stdout);
/* give other processes a chance */
usleep (100);
}
exit (0);
}
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