2 * freeglut_input_devices.c
4 * Handles miscellaneous input devices via direct serial-port access.
5 * Proper X11 XInput device support is not yet supported.
6 * Also lacks Mac support.
8 * Written by Joe Krahn <krahn@niehs.nih.gov> 2005
10 * Copyright (c) 2005 Stephen J. Baker. All Rights Reserved.
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
19 * The above copyright notice and this permission notice shall be included
20 * in all copies or substantial portions of the Software.
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
23 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * PAWEL W. OLSZTA OR STEPHEN J. BAKER BE LIABLE FOR ANY CLAIM, DAMAGES OR
26 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
27 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
35 #include <GL/freeglut.h>
36 #include "freeglut_internal.h"
38 #if TARGET_HOST_POSIX_X11
42 #include <sys/ioctl.h>
51 struct termios termio, termio_save;
54 #elif TARGET_HOST_MS_WINDOWS
55 #include <sys/types.h>
59 COMMTIMEOUTS timeouts_save;
65 /********************* Dialbox definitions ***********************/
67 #define DIAL_NUM_VALUATORS 8
69 /* dial parser state machine states */
71 #define DIAL_WHICH_DEVICE 0
72 #define DIAL_VALUE_HIGH 1
73 #define DIAL_VALUE_LOW 2
75 /* dial/button box commands */
76 #define DIAL_INITIALIZE 0x20
77 #define DIAL_SET_LEDS 0x75
78 #define DIAL_SET_TEXT 0x61
79 #define DIAL_SET_AUTO_DIALS 0x50
80 #define DIAL_SET_AUTO_DELTA_DIALS 0x51
81 #define DIAL_SET_FILTER 0x53
82 #define DIAL_SET_BUTTONS_MOM_TYPE 0x71
83 #define DIAL_SET_AUTO_MOM_BUTTONS 0x73
84 #define DIAL_SET_ALL_LEDS 0x4b
85 #define DIAL_CLEAR_ALL_LEDS 0x4c
87 /* dial/button box replies and events */
88 #define DIAL_INITIALIZED 0x20
89 #define DIAL_BASE 0x30
90 #define DIAL_DELTA_BASE 0x40
91 #define DIAL_PRESS_BASE 0xc0
92 #define DIAL_RELEASE_BASE 0xe0
94 /* macros to determine reply type */
95 #define IS_DIAL_EVENT(ch) (((ch)>=DIAL_BASE)&&((ch)<DIAL_BASE+DIAL_NUM_VALUATORS))
96 #define IS_KEY_PRESS(ch) (((ch)>=DIAL_PRESS_BASE)&&((ch)<DIAL_PRESS_BASE+DIAL_NUM_BUTTONS))
97 #define IS_KEY_RELEASE(ch) (((ch)>=DIAL_RELEASE_BASE)&&((ch)<DIAL_RELEASE_BASE+DIAL_NUM_BUTTONS))
98 #define IS_INIT_EVENT(ch) ((ch)==DIAL_INITIALIZED)
100 /*****************************************************************/
102 static SERIALPORT *serial_open ( const char *device );
103 static void serial_close ( SERIALPORT *port );
104 static int serial_getchar ( SERIALPORT *port );
105 static int serial_putchar ( SERIALPORT *port, unsigned char ch );
106 static void serial_flush ( SERIALPORT *port );
108 static void send_dial_event(int dial, int value);
109 static void poll_dials(int id);
111 /* local variables */
112 static SERIALPORT *dialbox_port=NULL;
114 /*****************************************************************/
117 * Implementation for glutDeviceGet(GLUT_HAS_DIAL_AND_BUTTON_BOX)
119 int fgInputDeviceDetect( void )
121 fgInitialiseInputDevices ();
126 if ( !fgState.InputDevsInitialised )
133 * Try initializing the input device(s)
135 void fgInitialiseInputDevices ( void )
137 if( !fgState.InputDevsInitialised )
139 const char *dial_device=NULL;
140 dial_device = getenv ( "GLUT_DIALS_SERIAL" );
141 #if TARGET_HOST_MS_WINDOWS
143 static char devname[256];
144 DWORD size=sizeof(devname);
147 if (RegOpenKeyA(HKEY_LOCAL_MACHINE,"SOFTWARE\\FreeGLUT",&key)==ERROR_SUCCESS) {
148 if (RegQueryValueExA(key,"DialboxSerialPort",NULL,&type,(LPBYTE)devname,&size)==ERROR_SUCCESS){
155 if ( !dial_device ) return;
156 if ( !( dialbox_port = serial_open ( dial_device ) ) ) return;
157 serial_putchar(dialbox_port,DIAL_INITIALIZE);
158 glutTimerFunc ( 10, poll_dials, 0 );
159 fgState.InputDevsInitialised = GL_TRUE;
166 void fgInputDeviceClose( void )
168 if ( fgState.InputDevsInitialised )
170 serial_close ( dialbox_port );
172 fgState.InputDevsInitialised = GL_FALSE;
176 /********************************************************************/
178 /* Check all windows for dialbox callbacks */
179 static void fghcbEnumDialCallbacks ( SFG_Window *window, SFG_Enumerator *enumerator )
181 /* Built-in to INVOKE_WCB(): if window->Callbacks[CB_Dials] */
182 INVOKE_WCB ( *window,Dials, ( ((int*)enumerator->data)[0], ((int*)enumerator->data)[1]) );
183 fgEnumSubWindows ( window, fghcbEnumDialCallbacks, enumerator );
186 static void send_dial_event ( int num, int value )
188 SFG_Enumerator enumerator;
192 enumerator.found = GL_FALSE;
193 enumerator.data = data;
194 fgEnumWindows ( fghcbEnumDialCallbacks, &enumerator );
197 /********************************************************************/
198 static void poll_dials ( int id )
201 static int dial_state = DIAL_NEW;
202 static int dial_which;
203 static int dial_value;
204 static int dials[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
206 if ( !dialbox_port ) return;
208 while ( (data=serial_getchar(dialbox_port)) != EOF )
210 if ( ( dial_state > DIAL_WHICH_DEVICE ) || IS_DIAL_EVENT ( data ) )
212 switch ( dial_state )
214 case DIAL_WHICH_DEVICE:
215 dial_which = data - DIAL_BASE;
218 case DIAL_VALUE_HIGH:
219 dial_value = ( data << 8 );
224 if ( dial_value & 0x8000 ) dial_value -= 0x10000;
225 dials[dial_which] = dial_value;
226 send_dial_event ( dial_which + 1, dial_value * 360 / 256 );
227 dial_state = DIAL_WHICH_DEVICE;
230 /* error: Impossible state value! */
234 else if ( data == DIAL_INITIALIZED )
236 fgState.InputDevsInitialised = GL_TRUE;
237 dial_state = DIAL_WHICH_DEVICE;
238 serial_putchar(dialbox_port,DIAL_SET_AUTO_DIALS);
239 serial_putchar(dialbox_port,0xff);
240 serial_putchar(dialbox_port,0xff);
242 else /* Unknown data; try flushing. */
243 serial_flush(dialbox_port);
246 glutTimerFunc ( 2, poll_dials, 0 );
250 /******** OS Specific Serial I/O routines *******/
251 #if TARGET_HOST_POSIX_X11 /* ==> Linux/BSD/UNIX POSIX serial I/O */
252 static SERIALPORT *serial_open ( const char *device )
255 struct termios termio;
258 fd = open(device, O_RDWR | O_NONBLOCK );
264 port = malloc(sizeof(SERIALPORT));
265 memset(port, 0, sizeof(SERIALPORT));
268 /* save current port settings */
269 tcgetattr(fd,&port->termio_save);
271 memset(&termio, 0, sizeof(termio));
272 termio.c_cflag = CS8 | CREAD | HUPCL ;
273 termio.c_iflag = IGNPAR | IGNBRK ;
274 termio.c_cc[VTIME] = 0; /* inter-character timer */
275 termio.c_cc[VMIN] = 1; /* block read until 1 chars received, when blocking I/O */
277 cfsetispeed(&termio, B9600);
278 cfsetospeed(&termio, B9600);
279 tcsetattr(fd,TCSANOW,&termio);
285 static void serial_close(SERIALPORT *port)
289 /* restore old port settings */
290 tcsetattr(port->fd,TCSANOW,&port->termio_save);
296 static int serial_getchar(SERIALPORT *port)
299 if (!port) return EOF;
300 if (read(port->fd,&ch,1)) return ch;
304 static int serial_putchar(SERIALPORT *port, unsigned char ch){
306 return write(port->fd,&ch,1);
309 static void serial_flush ( SERIALPORT *port )
311 tcflush ( port->fd, TCIOFLUSH );
314 #elif TARGET_HOST_MS_WINDOWS
316 static SERIALPORT *serial_open(const char *device){
318 DCB dcb={sizeof(DCB)};
319 COMMTIMEOUTS timeouts;
322 fh = CreateFile(device,GENERIC_READ|GENERIC_WRITE,0,NULL,
323 OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
324 if (!fh) return NULL;
326 port = malloc(sizeof(SERIALPORT));
327 ZeroMemory(port, sizeof(SERIALPORT));
330 /* save current port settings */
331 GetCommState(fh,&port->dcb_save);
332 GetCommTimeouts(fh,&port->timeouts_save);
334 dcb.DCBlength=sizeof(DCB);
335 BuildCommDCB("96,n,8,1",&dcb);
336 SetCommState(fh,&dcb);
338 ZeroMemory(&timeouts,sizeof(timeouts));
339 timeouts.ReadTotalTimeoutConstant=1;
340 timeouts.WriteTotalTimeoutConstant=1;
341 SetCommTimeouts(fh,&timeouts);
348 static void serial_close(SERIALPORT *port){
350 /* restore old port settings */
351 SetCommState(port->fh,&port->dcb_save);
352 SetCommTimeouts(port->fh,&port->timeouts_save);
353 CloseHandle(port->fh);
358 static int serial_getchar(SERIALPORT *port){
361 if (!port) return EOF;
362 if (!ReadFile(port->fh,&ch,1,&n,NULL)) return EOF;
367 static int serial_putchar(SERIALPORT *port, unsigned char ch){
370 return WriteFile(port->fh,&ch,1,&n,NULL);
373 static void serial_flush ( SERIALPORT *port )
375 FlushFileBuffers(port->fh);