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apple2ix/src/joystick.c
Aaron Culliney ef59e1ae9a Better PC Joystick calibration routine 
* Cleaned up the parameters page
    * Tweaked main/credits page
2013-12-21 23:56:21 -08:00

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C
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/*
* Apple // emulator for Linux: Joystick calibration routines
*
* Copyright 1994 Alexander Jean-Claude Bottema
* Copyright 1995 Stephen Lee
* Copyright 1997, 1998 Aaron Culliney
* Copyright 1998, 1999, 2000 Michael Deutschmann
*
* This software package is subject to the GNU General Public License
* version 2 or later (your choice) as published by the Free Software
* Foundation.
*
* THERE ARE NO WARRANTIES WHATSOEVER.
*
*/
#ifdef PC_JOYSTICK
#include <linux/joystick.h>
#endif
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <values.h>
#include "joystick.h"
#include "interface.h"
#include "video.h"
#include "keys.h"
#include "misc.h"
#include "prefs.h"
#ifdef PC_JOYSTICK
int js_fd = -1; /* joystick file descriptor */
struct JS_DATA_TYPE js; /* joystick data struct */
int js_lowerrange_x,
js_upperrange_x,
js_lowerrange_y,
js_upperrange_y,
js_offset_x,
js_offset_y;
float
js_adjustlow_x,
js_adjustlow_y,
js_adjusthigh_x,
js_adjusthigh_y;
/* -------------------------------------------------------------------------
c_open_pc_joystick() - opens joystick device and sets timelimit value
------------------------------------------------------------------------- */
static void c_calculate_pc_joystick_parms();
int c_open_pc_joystick()
{
if (js_fd < 0)
{
if ((js_fd = open("/dev/js0", O_RDONLY)) < 0)
{
/* try again with another name */
if ((js_fd = open("/dev/joystick", O_RDONLY)) < 0)
{
if ((js_fd = open("/dev/input/js0", O_RDONLY)) < 0)
{
return 1; /* problem */
}
}
}
/* set timelimit value */
if (ioctl(js_fd, JS_SET_TIMELIMIT, &js_timelimit) == -1)
{
return 1; /* problem */
}
}
c_calculate_pc_joystick_parms();
return 0; /* no problem */
}
/* -------------------------------------------------------------------------
c_close_pc_joystick() - closes joystick device
------------------------------------------------------------------------- */
void c_close_pc_joystick()
{
if (js_fd < 0)
{
return;
}
close(js_fd);
js_fd = -1;
}
/* -------------------------------------------------------------------------
* c_calculate_pc_joystick_parms() - calculates parameters for joystick
* device. assumes that device extremes have already been determined.
* ------------------------------------------------------------------------- */
static void c_calculate_pc_joystick_parms()
{
js_lowerrange_x = js_center_x - js_min_x;
js_upperrange_x = js_max_x - js_center_x;
js_lowerrange_y = js_center_y - js_min_y;
js_upperrange_y = js_max_y - js_center_y;
js_offset_x = js_min_x;
js_offset_y = js_min_y;
js_adjustlow_x = (float)HALF_JOY_RANGE / (float)js_lowerrange_x;
js_adjustlow_y = (float)HALF_JOY_RANGE / (float)js_lowerrange_y;
js_adjusthigh_x = (float)HALF_JOY_RANGE / (float)js_upperrange_x;
js_adjusthigh_y = (float)HALF_JOY_RANGE / (float)js_upperrange_y;
}
/* -------------------------------------------------------------------------
c_calibrate_pc_joystick() - calibrates joystick. determines extreme
and center coordinates. assumes that it can write to the interface
screen.
------------------------------------------------------------------------- */
extern void copy_and_pad_string(char *dest, const char* src, const char c, const int len, const char cap);
static void c_calibrate_pc_joystick()
{
#define JOYERR_PAD 35
#define JOYERR_SUBMENU_H 8
#define JOYERR_SUBMENU_W 40
char errmenu[JOYERR_SUBMENU_H][JOYERR_SUBMENU_W+1] =
//1. 5. 10. 15. 20. 25. 30. 35. 40.
{ "||||||||||||||||||||||||||||||||||||||||",
"| |",
"| An error occurred: |",
"| |",
"| Is a joystick device connected? |",
"| Is the proper kernel module loaded? |",
"| |",
"||||||||||||||||||||||||||||||||||||||||" };
#define JOYERR_SHOWERR(ERR) \
copy_and_pad_string(&errmenu[3][2], ERR, ' ', JOYERR_PAD, ' '); \
c_interface_print_submenu_centered(errmenu[0], JOYERR_SUBMENU_W, JOYERR_SUBMENU_H); \
while (c_mygetch(1) == -1) { }
/* reset all the extremes */
js_max_x = -1;
js_max_y = -1;
js_min_x = MAXINT;
js_min_y = MAXINT;
/* open joystick device if not open */
if (js_fd < 0)
{
if (c_open_pc_joystick())
{
JOYERR_SHOWERR(strerror(errno));
return;
}
}
#define CALIBRATE_SUBMENU_H 7
#define CALIBRATE_SUBMENU_W 40
char submenu[CALIBRATE_SUBMENU_H][CALIBRATE_SUBMENU_W+1] =
//1. 5. 10. 15. 20. 25. 30. 35. 40.
{ "||||||||||||||||||||||||||||||||||||||||",
"| |",
"| Move joystick to all extremes then |",
"| center it and long-press joy button |",
"| |",
"| btn1:@ btn2:@ x:@@@@ y:@@@@ |",
"||||||||||||||||||||||||||||||||||||||||" };
#define LONG_PRESS_THRESHOLD 120
#define SHOW_JOYSTICK_AXES(MENU, WIDTH, HEIGHT, X, Y) \
sprintf(temp, "%04x", (short)(X)); \
copy_and_pad_string(&MENU[HEIGHT-2][24], temp, ' ', 5, ' '); \
sprintf(temp, "%04x", (short)(Y)); \
copy_and_pad_string(&MENU[HEIGHT-2][32], temp, ' ', 5, ' '); \
c_interface_print_submenu_centered(MENU[0], WIDTH, HEIGHT);
#define SHOW_BUTTONS(MENU, HEIGHT) \
MENU[HEIGHT-2][8] = (js.buttons & 0x01) ? 'X' : ' '; \
MENU[HEIGHT-2][15] = (js.buttons & 0x02) ? 'X' : ' '; \
if (js.buttons & 0x03) \
{ \
++long_press; \
} \
else \
{ \
long_press = 0; \
}
unsigned int long_press = 0;
while ((read(js_fd, &js, JS_RETURN) > 0))
{
SHOW_BUTTONS(submenu, CALIBRATE_SUBMENU_H);
SHOW_JOYSTICK_AXES(submenu, CALIBRATE_SUBMENU_W, CALIBRATE_SUBMENU_H, js.x, js.y);
video_sync(0);
if (js_max_x < js.x)
{
js_max_x = js.x;
}
if (js_max_y < js.y)
{
js_max_y = js.y;
}
if (js_min_x > js.x)
{
js_min_x = js.x;
}
if (js_min_y > js.y)
{
js_min_y = js.y;
}
if (long_press > LONG_PRESS_THRESHOLD)
{
break;
}
}
long_press = 0;
js_center_x = js.x;
js_center_y = js.y;
#ifndef NDEBUG
LOG("js_min_x = %d", js_min_x);
LOG("js_min_y = %d", js_min_y);
LOG("js_max_x = %d", js_max_x);
LOG("js_max_y = %d", js_max_y);
LOG("js_center_x = %d", js_center_x);
LOG("js_center_y = %d", js_center_y);
LOG(" ");
#endif
c_calculate_pc_joystick_parms();
#ifndef NDEBUG
LOG("js_lowerrange_x = %d", js_lowerrange_x);
LOG("js_lowerrange_y = %d", js_lowerrange_y);
LOG("js_upperrange_x = %d", js_upperrange_x);
LOG("js_upperrange_y = %d", js_upperrange_y);
LOG(" ");
LOG("js_offset_x = %d", js_offset_x);
LOG("js_offset_y = %d", js_offset_y);
LOG(" ");
LOG("js_adjustlow_x = %f", js_adjustlow_x);
LOG("js_adjustlow_y = %f", js_adjustlow_y);
LOG("js_adjusthigh_x = %f", js_adjusthigh_x);
LOG("js_adjusthigh_y = %f", js_adjusthigh_y);
LOG(" ");
#endif
#define CALIBRATE_JOYMENU_H 20
#define CALIBRATE_JOYMENU_W 40
#define CALIBRATE_TURTLE_X0 4
#define CALIBRATE_TURTLE_Y0 5
#define CALIBRATE_TURTLE_STEP_X (30.f / 255.f)
#define CALIBRATE_TURTLE_STEP_Y (10.f / 255.f)
char joymenu[CALIBRATE_JOYMENU_H][CALIBRATE_JOYMENU_W+1] =
//1. 5. 10. 15. 20. 25. 30. 35. 40.
{ "||||||||||||||||||||||||||||||||||||||||",
"| |",
"| Long press joy button to quit |",
"| |",
"| ||||||||||||||||||||||||||||||||| |",
"| | | |",
"| | | |",
"| | | |",
"| | | |",
"| | | |",
"| | | |",
"| | | |",
"| | | |",
"| | | |",
"| | | |",
"| | | |",
"| ||||||||||||||||||||||||||||||||| |",
"| |",
"| btn1:@ btn2:@ x:@@@@ y:@@@@ |",
"||||||||||||||||||||||||||||||||||||||||" };
uint8_t x_val=0, y_val=0;
uint8_t x_last=CALIBRATE_JOYMENU_W>>1, y_last=CALIBRATE_JOYMENU_H>>1;
const char* const spinney = "|/-\\";
uint8_t spinney_idx=0;
bool finished_press = false;
while (read(js_fd, &js, JS_RETURN) > 0)
{
x_val = (js.x < js_center_x)
? (js.x - js_offset_x) * js_adjustlow_x
: (js.x - (js_center_x /*+js_offset_x*/)) * js_adjusthigh_x +
HALF_JOY_RANGE;
y_val = (js.y < js_center_y)
? (js.y - js_offset_y) * js_adjustlow_y
: (js.y - (js_center_y /*+js_offset_y*/)) * js_adjusthigh_y +
HALF_JOY_RANGE;
int x_plot = CALIBRATE_TURTLE_X0 + (int)(x_val * CALIBRATE_TURTLE_STEP_X);
int y_plot = CALIBRATE_TURTLE_Y0 + (int)(y_val * CALIBRATE_TURTLE_STEP_Y);
joymenu[y_last][x_last] = ' ';
joymenu[y_plot][x_plot] = spinney[spinney_idx];
x_last = x_plot;
y_last = y_plot;
SHOW_BUTTONS(joymenu, CALIBRATE_JOYMENU_H);
SHOW_JOYSTICK_AXES(joymenu, CALIBRATE_JOYMENU_W, CALIBRATE_JOYMENU_H, x_val, y_val);
video_sync(0);
spinney_idx = (spinney_idx+1) % 4;
if (!js.buttons)
{
finished_press = true;
}
if (finished_press && (long_press > LONG_PRESS_THRESHOLD))
{
break;
}
}
}
#endif // PC_JOYSTICK
#ifdef KEYPAD_JOYSTICK
static void c_calibrate_keypad_joystick()
{
// TODO ....
}
#endif
#ifdef TOUCH_JOYSTICK
// TBD ...
#endif
/* ---------------------------------------------------------------------- */
void c_open_joystick()
{
#ifdef PC_JOYSTICK
if (joy_mode == JOY_PCJOY)
{
c_open_pc_joystick();
}
#endif
#ifdef KEYPAD_JOYSTICK
if (joy_mode == JOY_KPAD)
{
// NOP
}
#endif
}
void c_close_joystick()
{
#ifdef PC_JOYSTICK
if (joy_mode == JOY_PCJOY)
{
c_close_pc_joystick();
}
#endif
#ifdef KEYPAD_JOYSTICK
if (joy_mode == JOY_KPAD)
{
// NOP
}
#endif
}
void c_calibrate_joystick()
{
#ifdef PC_JOYSTICK
if (joy_mode == JOY_PCJOY)
{
c_calibrate_pc_joystick();
}
#endif
#ifdef KEYPAD_JOYSTICK
if (joy_mode == JOY_KPAD)
{
c_calibrate_keypad_joystick();
}
#endif
}
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