Mercurial > sdl-ios-xcode
annotate src/video/fbcon/SDL_fbelo.c @ 42:eb1459f3a3ae
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| author | Sam Lantinga <slouken@lokigames.com> |
|---|---|
| date | Sun, 27 May 2001 00:38:26 +0000 |
| parents | 4f6c5f021323 |
| children | 2cf88672fc7f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga | |
| 4 | |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
| 20 slouken@devolution.com | |
| 21 */ | |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <stdlib.h> | |
| 29 #include <unistd.h> | |
| 30 #include <sys/time.h> | |
| 31 #include <ctype.h> | |
| 32 | |
| 33 #include "SDL_fbvideo.h" | |
| 34 #include "SDL_fbelo.h" | |
| 35 | |
| 36 /* | |
| 37 calibration default values | |
| 38 values are read from the following environment variables: | |
| 39 | |
| 40 SDL_ELO_MIN_X | |
| 41 SDL_ELO_MAX_X | |
| 42 SDL_ELO_MIN_Y | |
| 43 SDL_ELO_MAX_Y | |
| 44 */ | |
| 45 | |
| 46 static int ELO_MIN_X = 400; | |
| 47 static int ELO_MAX_X = 3670; | |
| 48 static int ELO_MIN_Y = 500; | |
| 49 static int ELO_MAX_Y = 3540; | |
| 50 | |
| 51 #define ELO_SNAP_SIZE 6 | |
| 52 #define ELO_TOUCH_BYTE 'T' | |
| 53 #define ELO_ID 'I' | |
| 54 #define ELO_MODE 'M' | |
| 55 #define ELO_PARAMETER 'P' | |
| 56 #define ELO_REPORT 'B' | |
| 57 #define ELO_ACK 'A' | |
| 58 | |
| 59 #define ELO_INIT_CHECKSUM 0xAA | |
| 60 | |
| 61 #define ELO_BTN_PRESS 0x01 | |
| 62 #define ELO_STREAM 0x02 | |
| 63 #define ELO_BTN_RELEASE 0x04 | |
| 64 | |
| 65 #define ELO_TOUCH_MODE 0x01 | |
| 66 #define ELO_STREAM_MODE 0x02 | |
| 67 #define ELO_UNTOUCH_MODE 0x04 | |
| 68 #define ELO_RANGE_CHECK_MODE 0x40 | |
| 69 #define ELO_TRIM_MODE 0x02 | |
| 70 #define ELO_CALIB_MODE 0x04 | |
| 71 #define ELO_SCALING_MODE 0x08 | |
| 72 #define ELO_TRACKING_MODE 0x40 | |
| 73 | |
| 74 #define ELO_SERIAL_MASK 0xF8 | |
| 75 | |
| 76 #define ELO_SERIAL_IO '0' | |
| 77 | |
| 78 #define ELO_MAX_TRIALS 3 | |
| 79 #define ELO_MAX_WAIT 100000 | |
| 80 #define ELO_UNTOUCH_DELAY 5 | |
| 81 #define ELO_REPORT_DELAY 1 | |
| 82 | |
| 83 /* eloParsePacket | |
| 84 */ | |
| 85 int eloParsePacket(unsigned char* mousebuf, int* dx, int* dy, int* button_state) { | |
| 86 static int elo_button = 0; | |
| 87 static int last_x = 0; | |
| 88 static int last_y = 0; | |
| 89 int x,y; | |
| 90 | |
| 91 /* Check if we have a touch packet */ | |
| 92 if (mousebuf[1] != ELO_TOUCH_BYTE) { | |
| 93 return 0; | |
| 94 } | |
| 95 | |
| 96 x = ((mousebuf[4] << 8) | mousebuf[3]); | |
| 97 y = ((mousebuf[6] << 8) | mousebuf[5]); | |
| 98 | |
| 99 if((abs(x - last_x) > ELO_SNAP_SIZE) || (abs(y - last_y) > ELO_SNAP_SIZE)) { | |
| 100 *dx = ((mousebuf[4] << 8) | mousebuf[3]); | |
| 101 *dy = ((mousebuf[6] << 8) | mousebuf[5]); | |
| 102 } | |
| 103 else { | |
| 104 *dx = last_x; | |
| 105 *dy = last_y; | |
| 106 } | |
| 107 | |
| 108 last_x = *dx; | |
| 109 last_y = *dy; | |
| 110 | |
| 111 if ( (mousebuf[2] & 0x07) == ELO_BTN_PRESS ) { | |
| 112 elo_button = 1; | |
| 113 } | |
| 114 if ( (mousebuf[2] & 0x07) == ELO_BTN_RELEASE ) { | |
| 115 elo_button = 0; | |
| 116 } | |
| 117 | |
| 118 *button_state = elo_button; | |
| 119 return 1; | |
| 120 } | |
| 121 | |
| 122 /* Convert the raw coordinates from the ELO controller | |
| 123 to a screen position. | |
| 124 */ | |
| 125 void eloConvertXY(_THIS, int *dx, int *dy) { | |
| 126 int input_x = *dx; | |
| 127 int input_y = *dy; | |
| 128 int width = ELO_MAX_X - ELO_MIN_X; | |
| 129 int height = ELO_MAX_Y - ELO_MIN_Y; | |
| 130 | |
| 131 *dx = (cache_vinfo.xres - (cache_vinfo.xres * (input_x - ELO_MIN_X)) / width); | |
| 132 *dy = (cache_vinfo.yres * (input_y - ELO_MIN_Y)) / height; | |
| 133 } | |
| 134 | |
| 135 | |
| 136 /* eloGetPacket | |
| 137 */ | |
| 138 int eloGetPacket(unsigned char* buffer, int* buffer_p, int* checksum, int fd) { | |
| 139 int num_bytes; | |
| 140 int ok; | |
| 141 | |
| 142 if(fd == 0) { | |
| 143 num_bytes = ELO_PACKET_SIZE; | |
| 144 } | |
| 145 else { | |
| 146 num_bytes = read(fd, | |
| 147 (char *) (buffer + *buffer_p), | |
| 148 ELO_PACKET_SIZE - *buffer_p); | |
| 149 } | |
| 150 | |
| 151 if (num_bytes < 0) { | |
| 152 #ifdef DEBUG_MOUSE | |
| 153 fprintf(stderr, "System error while reading from Elographics touchscreen.\n"); | |
| 154 #endif | |
| 155 return 0; | |
| 156 } | |
| 157 | |
| 158 while (num_bytes) { | |
| 159 if ((*buffer_p == 0) && (buffer[0] != ELO_START_BYTE)) { | |
| 160 memcpy(&buffer[0], &buffer[1], num_bytes-1); | |
| 161 } | |
| 162 else { | |
| 163 if (*buffer_p < ELO_PACKET_SIZE-1) { | |
| 164 *checksum = *checksum + buffer[*buffer_p]; | |
| 165 *checksum = *checksum % 256; | |
| 166 } | |
| 167 (*buffer_p)++; | |
| 168 } | |
| 169 num_bytes--; | |
| 170 } | |
| 171 | |
| 172 if (*buffer_p == ELO_PACKET_SIZE) { | |
| 173 ok = (*checksum == buffer[ELO_PACKET_SIZE-1]); | |
| 174 *checksum = ELO_INIT_CHECKSUM; | |
| 175 *buffer_p = 0; | |
| 176 | |
| 177 if (!ok) { | |
| 178 return 0; | |
| 179 } | |
| 180 | |
| 181 return 1; | |
| 182 } | |
| 183 else { | |
| 184 return 0; | |
| 185 } | |
| 186 } | |
| 187 | |
| 188 /* eloSendPacket | |
| 189 */ | |
| 190 | |
| 191 int eloSendPacket(unsigned char* packet, int fd) | |
| 192 { | |
| 193 int i, result; | |
| 194 int sum = ELO_INIT_CHECKSUM; | |
| 195 | |
| 196 packet[0] = ELO_START_BYTE; | |
| 197 for (i = 0; i < ELO_PACKET_SIZE-1; i++) { | |
| 198 sum += packet[i]; | |
| 199 sum &= 0xFF; | |
| 200 } | |
| 201 packet[ELO_PACKET_SIZE-1] = sum; | |
| 202 | |
| 203 result = write(fd, packet, ELO_PACKET_SIZE); | |
| 204 | |
| 205 if (result != ELO_PACKET_SIZE) { | |
| 206 #ifdef DEBUG_MOUSE | |
| 207 printf("System error while sending to Elographics touchscreen.\n"); | |
| 208 #endif | |
| 209 return 0; | |
| 210 } | |
| 211 else { | |
| 212 return 1; | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 | |
| 217 /* eloWaitForInput | |
| 218 */ | |
| 219 int eloWaitForInput(int fd, int timeout) | |
| 220 { | |
| 221 fd_set readfds; | |
| 222 struct timeval to; | |
| 223 int r; | |
| 224 | |
| 225 FD_ZERO(&readfds); | |
| 226 FD_SET(fd, &readfds); | |
| 227 to.tv_sec = 0; | |
| 228 to.tv_usec = timeout; | |
| 229 | |
| 230 r = select(FD_SETSIZE, &readfds, NULL, NULL, &to); | |
| 231 return r; | |
| 232 } | |
| 233 | |
| 234 /* eloWaitReply | |
| 235 */ | |
| 236 int eloWaitReply(unsigned char type, unsigned char *reply, int fd) { | |
| 237 int ok; | |
| 238 int i, result; | |
| 239 int reply_p = 0; | |
| 240 int sum = ELO_INIT_CHECKSUM; | |
| 241 | |
| 242 i = ELO_MAX_TRIALS; | |
| 243 do { | |
| 244 ok = 0; | |
| 245 | |
| 246 result = eloWaitForInput(fd, ELO_MAX_WAIT); | |
| 247 | |
| 248 if (result > 0) { | |
| 249 ok = eloGetPacket(reply, &reply_p, &sum, fd); | |
| 250 | |
| 251 if (ok && reply[1] != type && type != ELO_PARAMETER) { | |
| 252 #ifdef DEBUG_MOUSE | |
| 253 fprintf(stderr, "Wrong reply received\n"); | |
| 254 #endif | |
| 255 ok = 0; | |
| 256 } | |
| 257 } | |
| 258 else { | |
| 259 #ifdef DEBUG_MOUSE | |
| 260 fprintf(stderr, "No input!\n"); | |
| 261 #endif | |
| 262 } | |
| 263 | |
| 264 if (result == 0) { | |
| 265 i--; | |
| 266 } | |
| 267 } while(!ok && (i>0)); | |
| 268 | |
| 269 return ok; | |
| 270 } | |
| 271 | |
| 272 | |
| 273 /* eloWaitAck | |
| 274 */ | |
| 275 | |
| 276 int eloWaitAck(int fd) { | |
| 277 unsigned char packet[ELO_PACKET_SIZE]; | |
| 278 int i, nb_errors; | |
| 279 | |
| 280 if (eloWaitReply(ELO_ACK, packet, fd)) { | |
| 281 for (i = 0, nb_errors = 0; i < 4; i++) { | |
| 282 if (packet[2 + i] != '0') { | |
| 283 nb_errors++; | |
| 284 } | |
| 285 } | |
| 286 | |
| 287 if (nb_errors != 0) { | |
| 288 #ifdef DEBUG_MOUSE | |
| 289 fprintf(stderr, "Elographics acknowledge packet reports %d errors\n", nb_errors); | |
| 290 #endif | |
| 291 } | |
| 292 return 1; | |
| 293 } | |
| 294 else { | |
| 295 return 0; | |
| 296 } | |
| 297 } | |
| 298 | |
| 299 | |
| 300 /* eloSendQuery -- | |
| 301 */ | |
| 302 int eloSendQuery(unsigned char *request, unsigned char* reply, int fd) { | |
| 303 int ok; | |
| 304 | |
| 305 if (eloSendPacket(request, fd)) { | |
| 306 ok = eloWaitReply(toupper(request[1]), reply, fd); | |
| 307 if (ok) { | |
| 308 ok = eloWaitAck(fd); | |
| 309 } | |
| 310 return ok; | |
| 311 } | |
| 312 else { | |
| 313 return 0; | |
| 314 } | |
| 315 } | |
| 316 | |
| 317 | |
| 318 /* eloSendControl | |
| 319 */ | |
| 320 int eloSendControl(unsigned char* control, int fd) { | |
| 321 if (eloSendPacket(control, fd)) { | |
| 322 return eloWaitAck(fd); | |
| 323 } | |
| 324 else { | |
| 325 return 0; | |
| 326 } | |
| 327 } | |
| 328 | |
| 329 /* eloInitController | |
| 330 */ | |
| 331 int eloInitController(int fd) { | |
| 332 unsigned char req[ELO_PACKET_SIZE]; | |
| 333 unsigned char reply[ELO_PACKET_SIZE]; | |
| 334 const char *buffer = NULL; | |
| 335 int result = 0; | |
| 336 | |
| 337 struct termios mouse_termios; | |
| 338 | |
| 339 /* try to read the calibration values */ | |
| 340 buffer = getenv("SDL_ELO_MIN_X"); | |
| 341 if(buffer) { | |
| 342 ELO_MIN_X = atoi(buffer); | |
| 343 } | |
| 344 buffer = getenv("SDL_ELO_MAX_X"); | |
| 345 if(buffer) { | |
| 346 ELO_MAX_X = atoi(buffer); | |
| 347 } | |
| 348 buffer = getenv("SDL_ELO_MIN_Y"); | |
| 349 if(buffer) { | |
| 350 ELO_MIN_Y = atoi(buffer); | |
| 351 } | |
| 352 buffer = getenv("SDL_ELO_MAX_Y"); | |
| 353 if(buffer) { | |
| 354 ELO_MAX_Y = atoi(buffer); | |
| 355 } | |
| 356 | |
| 357 #ifdef DEBUG_MOUSE | |
| 358 fprintf( stderr, "ELO calibration values:\nmin_x: %i\nmax_x: %i\nmin_y: %i\nmax_y: %i\n", | |
| 359 ELO_MIN_X, | |
| 360 ELO_MAX_X, | |
| 361 ELO_MIN_Y, | |
| 362 ELO_MAX_Y); | |
| 363 #endif | |
| 364 | |
| 365 /* set comm params */ | |
| 366 memset(&mouse_termios, 0, sizeof(mouse_termios)); | |
| 367 mouse_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL; | |
| 368 mouse_termios.c_cc[VMIN] = 1; | |
| 369 result = tcsetattr(fd, TCSANOW, &mouse_termios); | |
| 370 | |
| 371 if (result < 0) { | |
| 372 #ifdef DEBUG_MOUSE | |
| 373 fprintf( stderr, "Unable to configure Elographics touchscreen port\n"); | |
| 374 #endif | |
| 375 return 0; | |
| 376 } | |
| 377 | |
| 378 memset(req, 0, ELO_PACKET_SIZE); | |
| 379 req[1] = tolower(ELO_PARAMETER); | |
| 380 if (!eloSendQuery(req, reply, fd)) { | |
| 381 #ifdef DEBUG_MOUSE | |
| 382 fprintf( stderr, "Not at the specified rate or model 2310, will continue\n"); | |
| 383 #endif | |
| 384 } | |
| 385 | |
| 386 memset(req, 0, ELO_PACKET_SIZE); | |
| 387 req[1] = tolower(ELO_ID); | |
| 388 if (eloSendQuery(req, reply, fd)) { | |
| 389 #ifdef DEBUG_MOUSE | |
| 390 fprintf(stderr, "Ok, controller configured!\n"); | |
| 391 #endif | |
| 392 } | |
| 393 else { | |
| 394 #ifdef DEBUG_MOUSE | |
| 395 fprintf( stderr, "Unable to ask Elographics touchscreen identification\n"); | |
| 396 #endif | |
| 397 return 0; | |
| 398 } | |
| 399 | |
| 400 memset(req, 0, ELO_PACKET_SIZE); | |
| 401 req[1] = ELO_MODE; | |
| 402 req[3] = ELO_TOUCH_MODE | ELO_STREAM_MODE | ELO_UNTOUCH_MODE; | |
| 403 req[4] = ELO_TRACKING_MODE; | |
| 404 if (!eloSendControl(req, fd)) { | |
| 405 #ifdef DEBUG_MOUSE | |
| 406 fprintf( stderr, "Unable to change Elographics touchscreen operating mode\n"); | |
| 407 #endif | |
| 408 return 0; | |
| 409 } | |
| 410 | |
| 411 memset(req, 0, ELO_PACKET_SIZE); | |
| 412 req[1] = ELO_REPORT; | |
| 413 req[2] = ELO_UNTOUCH_DELAY; | |
| 414 req[3] = ELO_REPORT_DELAY; | |
| 415 if (!eloSendControl(req, fd)) { | |
| 416 #ifdef DEBUG_MOUSE | |
| 417 fprintf( stderr, "Unable to change Elographics touchscreen reports timings\n"); | |
| 418 #endif | |
| 419 return 0; | |
| 420 } | |
| 421 | |
| 422 return 1; | |
| 423 } | |
|
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4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
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424 |
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4f6c5f021323
Date: Thu, 26 Apr 2001 10:46:23 +0200
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parents:
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425 int eloReadPosition(_THIS, int fd, int* x, int* y, int* button_state, int* realx, int* realy) { |
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426 unsigned char buffer[ELO_PACKET_SIZE]; |
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427 int pointer = 0; |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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428 int checksum = ELO_INIT_CHECKSUM; |
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429 |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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430 while(pointer < ELO_PACKET_SIZE) { |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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431 if(eloGetPacket(buffer, &pointer, &checksum, fd)) { |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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432 break; |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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433 } |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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434 } |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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435 |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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436 if(!eloParsePacket(buffer, realx, realy, button_state)) { |
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437 return 0; |
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438 } |
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439 |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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440 *x = *realx; |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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441 *y = *realy; |
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442 |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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443 eloConvertXY(this, x, y); |
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444 |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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445 return 1; |
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Date: Thu, 26 Apr 2001 10:46:23 +0200
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446 } |