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126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/************************************************************************/
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/* KEGS: Apple //gs Emulator */
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/* Copyright 2002 by Kent Dickey */
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/* */
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/* This code is covered by the GNU GPL */
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/* */
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/* The KEGS web page is kegs.sourceforge.net */
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/* You may contact the author at: kadickey@alumni.princeton.edu */
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/************************************************************************/
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const char rcsid_joystick_driver_c[] = "@(#)$KmKId: joystick_driver.c,v 1.12 2004-10-17 21:28:48-04 kentd Exp $";
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#include "defc.h"
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#include <sys/time.h>
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# include <linux/joystick.h>
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extern int g_joystick_native_type1; /* in paddles.c */
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extern int g_joystick_native_type2; /* in paddles.c */
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extern int g_joystick_native_type; /* in paddles.c */
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extern int g_paddle_buttons;
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extern int g_paddle_val[];
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const char *g_joystick_dev = "/dev/js0"; /* default joystick dev file */
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#define MAX_JOY_NAME 128
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int g_joystick_native_fd = -1;
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int g_joystick_num_axes = 0;
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int g_joystick_num_buttons = 0;
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void
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joystick_init()
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{
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char joy_name[MAX_JOY_NAME];
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int version;
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int fd;
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int i;
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fd = open(g_joystick_dev, O_RDONLY | O_NONBLOCK);
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if(fd < 0) {
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printf("Unable to open joystick dev file: %s, errno: %d\n",
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g_joystick_dev, errno);
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printf("Defaulting to mouse joystick\n");
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return;
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}
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strcpy(&joy_name[0], "Unknown Joystick");
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version = 0x800;
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ioctl(fd, JSIOCGNAME(MAX_JOY_NAME), &joy_name[0]);
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ioctl(fd, JSIOCGAXES, &g_joystick_num_axes);
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ioctl(fd, JSIOCGBUTTONS, &g_joystick_num_buttons);
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ioctl(fd, JSIOCGVERSION, &version);
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printf("Detected joystick: %s [%d axes, %d buttons vers: %08x]\n",
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joy_name, g_joystick_num_axes, g_joystick_num_buttons,
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version);
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g_joystick_native_type1 = 1;
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g_joystick_native_type2 = -1;
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g_joystick_native_fd = fd;
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for(i = 0; i < 4; i++) {
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g_paddle_val[i] = 32767;
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}
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g_paddle_buttons = 0xc;
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joystick_update(0.0);
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}
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/* joystick_update_linux() called from paddles.c. Update g_paddle_val[] */
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/* and g_paddle_buttons with current information */
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void
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joystick_update(double dcycs)
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{
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struct js_event js; /* the linux joystick event record */
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int mask;
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int val;
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int num;
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int type;
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int ret;
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int len;
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int i;
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/* suck up to 20 events, then give up */
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len = sizeof(struct js_event);
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for(i = 0; i < 20; i++) {
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ret = read(g_joystick_native_fd, &js, len);
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if(ret != len) {
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/* just get out */
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break;
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}
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type = js.type & ~JS_EVENT_INIT;
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val = js.value;
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num = js.number & 3; /* clamp to 0-3 */
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switch(type) {
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case JS_EVENT_BUTTON:
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mask = 1 << num;
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if(val) {
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val = mask;
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}
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g_paddle_buttons = (g_paddle_buttons & ~mask) | val;
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break;
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case JS_EVENT_AXIS:
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/* val is -32767 to +32767 */
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g_paddle_val[num] = val;
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break;
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}
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}
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if(i > 0) {
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paddle_update_trigger_dcycs(dcycs);
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}
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}
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void
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joystick_update_buttons()
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{
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}
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// OG
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void joystick_shut()
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{
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}
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