Mercurial > sdl-ios-xcode
annotate src/video/fbcon/SDL_fbelo.c @ 1216:f8fc6fdd589d
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 02 Jan 2006 09:13:16 +0000 |
| parents | b8d311d90021 |
| children | 36f24cdfcda7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 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 | |
|
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Updated the source with the correct e-mail address
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20 slouken@libsdl.org |
| 0 | 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> | |
| 152 | 32 #include <string.h> |
| 0 | 33 |
| 34 #include "SDL_fbvideo.h" | |
| 35 #include "SDL_fbelo.h" | |
| 36 | |
| 37 /* | |
| 38 calibration default values | |
| 39 values are read from the following environment variables: | |
| 40 | |
| 41 SDL_ELO_MIN_X | |
| 42 SDL_ELO_MAX_X | |
| 43 SDL_ELO_MIN_Y | |
| 44 SDL_ELO_MAX_Y | |
| 45 */ | |
| 46 | |
| 47 static int ELO_MIN_X = 400; | |
| 48 static int ELO_MAX_X = 3670; | |
| 49 static int ELO_MIN_Y = 500; | |
| 50 static int ELO_MAX_Y = 3540; | |
| 51 | |
| 52 #define ELO_SNAP_SIZE 6 | |
| 53 #define ELO_TOUCH_BYTE 'T' | |
| 54 #define ELO_ID 'I' | |
| 55 #define ELO_MODE 'M' | |
| 56 #define ELO_PARAMETER 'P' | |
| 57 #define ELO_REPORT 'B' | |
| 58 #define ELO_ACK 'A' | |
| 59 | |
| 60 #define ELO_INIT_CHECKSUM 0xAA | |
| 61 | |
| 62 #define ELO_BTN_PRESS 0x01 | |
| 63 #define ELO_STREAM 0x02 | |
| 64 #define ELO_BTN_RELEASE 0x04 | |
| 65 | |
| 66 #define ELO_TOUCH_MODE 0x01 | |
| 67 #define ELO_STREAM_MODE 0x02 | |
| 68 #define ELO_UNTOUCH_MODE 0x04 | |
| 69 #define ELO_RANGE_CHECK_MODE 0x40 | |
| 70 #define ELO_TRIM_MODE 0x02 | |
| 71 #define ELO_CALIB_MODE 0x04 | |
| 72 #define ELO_SCALING_MODE 0x08 | |
| 73 #define ELO_TRACKING_MODE 0x40 | |
| 74 | |
| 75 #define ELO_SERIAL_MASK 0xF8 | |
| 76 | |
| 77 #define ELO_SERIAL_IO '0' | |
| 78 | |
| 79 #define ELO_MAX_TRIALS 3 | |
| 80 #define ELO_MAX_WAIT 100000 | |
| 81 #define ELO_UNTOUCH_DELAY 5 | |
| 82 #define ELO_REPORT_DELAY 1 | |
| 83 | |
| 84 /* eloParsePacket | |
| 85 */ | |
| 86 int eloParsePacket(unsigned char* mousebuf, int* dx, int* dy, int* button_state) { | |
| 87 static int elo_button = 0; | |
| 88 static int last_x = 0; | |
| 89 static int last_y = 0; | |
| 90 int x,y; | |
| 91 | |
| 92 /* Check if we have a touch packet */ | |
| 93 if (mousebuf[1] != ELO_TOUCH_BYTE) { | |
| 94 return 0; | |
| 95 } | |
| 96 | |
| 97 x = ((mousebuf[4] << 8) | mousebuf[3]); | |
| 98 y = ((mousebuf[6] << 8) | mousebuf[5]); | |
| 99 | |
| 100 if((abs(x - last_x) > ELO_SNAP_SIZE) || (abs(y - last_y) > ELO_SNAP_SIZE)) { | |
| 101 *dx = ((mousebuf[4] << 8) | mousebuf[3]); | |
| 102 *dy = ((mousebuf[6] << 8) | mousebuf[5]); | |
| 103 } | |
| 104 else { | |
| 105 *dx = last_x; | |
| 106 *dy = last_y; | |
| 107 } | |
| 108 | |
| 109 last_x = *dx; | |
| 110 last_y = *dy; | |
| 111 | |
| 112 if ( (mousebuf[2] & 0x07) == ELO_BTN_PRESS ) { | |
| 113 elo_button = 1; | |
| 114 } | |
| 115 if ( (mousebuf[2] & 0x07) == ELO_BTN_RELEASE ) { | |
| 116 elo_button = 0; | |
| 117 } | |
| 118 | |
| 119 *button_state = elo_button; | |
| 120 return 1; | |
| 121 } | |
| 122 | |
| 123 /* Convert the raw coordinates from the ELO controller | |
| 124 to a screen position. | |
| 125 */ | |
| 126 void eloConvertXY(_THIS, int *dx, int *dy) { | |
| 127 int input_x = *dx; | |
| 128 int input_y = *dy; | |
| 129 int width = ELO_MAX_X - ELO_MIN_X; | |
| 130 int height = ELO_MAX_Y - ELO_MIN_Y; | |
| 131 | |
| 132 *dx = (cache_vinfo.xres - (cache_vinfo.xres * (input_x - ELO_MIN_X)) / width); | |
| 133 *dy = (cache_vinfo.yres * (input_y - ELO_MIN_Y)) / height; | |
| 134 } | |
| 135 | |
| 136 | |
| 137 /* eloGetPacket | |
| 138 */ | |
| 139 int eloGetPacket(unsigned char* buffer, int* buffer_p, int* checksum, int fd) { | |
| 140 int num_bytes; | |
| 141 int ok; | |
| 142 | |
| 143 if(fd == 0) { | |
| 144 num_bytes = ELO_PACKET_SIZE; | |
| 145 } | |
| 146 else { | |
| 147 num_bytes = read(fd, | |
| 148 (char *) (buffer + *buffer_p), | |
| 149 ELO_PACKET_SIZE - *buffer_p); | |
| 150 } | |
| 151 | |
| 152 if (num_bytes < 0) { | |
| 153 #ifdef DEBUG_MOUSE | |
| 154 fprintf(stderr, "System error while reading from Elographics touchscreen.\n"); | |
| 155 #endif | |
| 156 return 0; | |
| 157 } | |
| 158 | |
| 159 while (num_bytes) { | |
| 160 if ((*buffer_p == 0) && (buffer[0] != ELO_START_BYTE)) { | |
| 161 memcpy(&buffer[0], &buffer[1], num_bytes-1); | |
| 162 } | |
| 163 else { | |
| 164 if (*buffer_p < ELO_PACKET_SIZE-1) { | |
| 165 *checksum = *checksum + buffer[*buffer_p]; | |
| 166 *checksum = *checksum % 256; | |
| 167 } | |
| 168 (*buffer_p)++; | |
| 169 } | |
| 170 num_bytes--; | |
| 171 } | |
| 172 | |
| 173 if (*buffer_p == ELO_PACKET_SIZE) { | |
| 174 ok = (*checksum == buffer[ELO_PACKET_SIZE-1]); | |
| 175 *checksum = ELO_INIT_CHECKSUM; | |
| 176 *buffer_p = 0; | |
| 177 | |
| 178 if (!ok) { | |
| 179 return 0; | |
| 180 } | |
| 181 | |
| 182 return 1; | |
| 183 } | |
| 184 else { | |
| 185 return 0; | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 /* eloSendPacket | |
| 190 */ | |
| 191 | |
| 192 int eloSendPacket(unsigned char* packet, int fd) | |
| 193 { | |
| 194 int i, result; | |
| 195 int sum = ELO_INIT_CHECKSUM; | |
| 196 | |
| 197 packet[0] = ELO_START_BYTE; | |
| 198 for (i = 0; i < ELO_PACKET_SIZE-1; i++) { | |
| 199 sum += packet[i]; | |
| 200 sum &= 0xFF; | |
| 201 } | |
| 202 packet[ELO_PACKET_SIZE-1] = sum; | |
| 203 | |
| 204 result = write(fd, packet, ELO_PACKET_SIZE); | |
| 205 | |
| 206 if (result != ELO_PACKET_SIZE) { | |
| 207 #ifdef DEBUG_MOUSE | |
| 208 printf("System error while sending to Elographics touchscreen.\n"); | |
| 209 #endif | |
| 210 return 0; | |
| 211 } | |
| 212 else { | |
| 213 return 1; | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 | |
| 218 /* eloWaitForInput | |
| 219 */ | |
| 220 int eloWaitForInput(int fd, int timeout) | |
| 221 { | |
| 222 fd_set readfds; | |
| 223 struct timeval to; | |
| 224 int r; | |
| 225 | |
| 226 FD_ZERO(&readfds); | |
| 227 FD_SET(fd, &readfds); | |
| 228 to.tv_sec = 0; | |
| 229 to.tv_usec = timeout; | |
| 230 | |
| 231 r = select(FD_SETSIZE, &readfds, NULL, NULL, &to); | |
| 232 return r; | |
| 233 } | |
| 234 | |
| 235 /* eloWaitReply | |
| 236 */ | |
| 237 int eloWaitReply(unsigned char type, unsigned char *reply, int fd) { | |
| 238 int ok; | |
| 239 int i, result; | |
| 240 int reply_p = 0; | |
| 241 int sum = ELO_INIT_CHECKSUM; | |
| 242 | |
| 243 i = ELO_MAX_TRIALS; | |
| 244 do { | |
| 245 ok = 0; | |
| 246 | |
| 247 result = eloWaitForInput(fd, ELO_MAX_WAIT); | |
| 248 | |
| 249 if (result > 0) { | |
| 250 ok = eloGetPacket(reply, &reply_p, &sum, fd); | |
| 251 | |
| 252 if (ok && reply[1] != type && type != ELO_PARAMETER) { | |
| 253 #ifdef DEBUG_MOUSE | |
| 254 fprintf(stderr, "Wrong reply received\n"); | |
| 255 #endif | |
| 256 ok = 0; | |
| 257 } | |
| 258 } | |
| 259 else { | |
| 260 #ifdef DEBUG_MOUSE | |
| 261 fprintf(stderr, "No input!\n"); | |
| 262 #endif | |
| 263 } | |
| 264 | |
| 265 if (result == 0) { | |
| 266 i--; | |
| 267 } | |
| 268 } while(!ok && (i>0)); | |
| 269 | |
| 270 return ok; | |
| 271 } | |
| 272 | |
| 273 | |
| 274 /* eloWaitAck | |
| 275 */ | |
| 276 | |
| 277 int eloWaitAck(int fd) { | |
| 278 unsigned char packet[ELO_PACKET_SIZE]; | |
| 279 int i, nb_errors; | |
| 280 | |
| 281 if (eloWaitReply(ELO_ACK, packet, fd)) { | |
| 282 for (i = 0, nb_errors = 0; i < 4; i++) { | |
| 283 if (packet[2 + i] != '0') { | |
| 284 nb_errors++; | |
| 285 } | |
| 286 } | |
| 287 | |
| 288 if (nb_errors != 0) { | |
| 289 #ifdef DEBUG_MOUSE | |
| 290 fprintf(stderr, "Elographics acknowledge packet reports %d errors\n", nb_errors); | |
| 291 #endif | |
| 292 } | |
| 293 return 1; | |
| 294 } | |
| 295 else { | |
| 296 return 0; | |
| 297 } | |
| 298 } | |
| 299 | |
| 300 | |
| 301 /* eloSendQuery -- | |
| 302 */ | |
| 303 int eloSendQuery(unsigned char *request, unsigned char* reply, int fd) { | |
| 304 int ok; | |
| 305 | |
| 306 if (eloSendPacket(request, fd)) { | |
| 307 ok = eloWaitReply(toupper(request[1]), reply, fd); | |
| 308 if (ok) { | |
| 309 ok = eloWaitAck(fd); | |
| 310 } | |
| 311 return ok; | |
| 312 } | |
| 313 else { | |
| 314 return 0; | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 | |
| 319 /* eloSendControl | |
| 320 */ | |
| 321 int eloSendControl(unsigned char* control, int fd) { | |
| 322 if (eloSendPacket(control, fd)) { | |
| 323 return eloWaitAck(fd); | |
| 324 } | |
| 325 else { | |
| 326 return 0; | |
| 327 } | |
| 328 } | |
| 329 | |
| 330 /* eloInitController | |
| 331 */ | |
| 332 int eloInitController(int fd) { | |
| 333 unsigned char req[ELO_PACKET_SIZE]; | |
| 334 unsigned char reply[ELO_PACKET_SIZE]; | |
| 335 const char *buffer = NULL; | |
| 336 int result = 0; | |
| 337 | |
| 338 struct termios mouse_termios; | |
| 339 | |
| 340 /* try to read the calibration values */ | |
| 341 buffer = getenv("SDL_ELO_MIN_X"); | |
| 342 if(buffer) { | |
| 343 ELO_MIN_X = atoi(buffer); | |
| 344 } | |
| 345 buffer = getenv("SDL_ELO_MAX_X"); | |
| 346 if(buffer) { | |
| 347 ELO_MAX_X = atoi(buffer); | |
| 348 } | |
| 349 buffer = getenv("SDL_ELO_MIN_Y"); | |
| 350 if(buffer) { | |
| 351 ELO_MIN_Y = atoi(buffer); | |
| 352 } | |
| 353 buffer = getenv("SDL_ELO_MAX_Y"); | |
| 354 if(buffer) { | |
| 355 ELO_MAX_Y = atoi(buffer); | |
| 356 } | |
| 357 | |
| 358 #ifdef DEBUG_MOUSE | |
| 359 fprintf( stderr, "ELO calibration values:\nmin_x: %i\nmax_x: %i\nmin_y: %i\nmax_y: %i\n", | |
| 360 ELO_MIN_X, | |
| 361 ELO_MAX_X, | |
| 362 ELO_MIN_Y, | |
| 363 ELO_MAX_Y); | |
| 364 #endif | |
| 365 | |
| 366 /* set comm params */ | |
| 367 memset(&mouse_termios, 0, sizeof(mouse_termios)); | |
| 368 mouse_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL; | |
| 369 mouse_termios.c_cc[VMIN] = 1; | |
| 370 result = tcsetattr(fd, TCSANOW, &mouse_termios); | |
| 371 | |
| 372 if (result < 0) { | |
| 373 #ifdef DEBUG_MOUSE | |
| 374 fprintf( stderr, "Unable to configure Elographics touchscreen port\n"); | |
| 375 #endif | |
| 376 return 0; | |
| 377 } | |
| 378 | |
| 379 memset(req, 0, ELO_PACKET_SIZE); | |
| 380 req[1] = tolower(ELO_PARAMETER); | |
| 381 if (!eloSendQuery(req, reply, fd)) { | |
| 382 #ifdef DEBUG_MOUSE | |
| 383 fprintf( stderr, "Not at the specified rate or model 2310, will continue\n"); | |
| 384 #endif | |
| 385 } | |
| 386 | |
| 387 memset(req, 0, ELO_PACKET_SIZE); | |
| 388 req[1] = tolower(ELO_ID); | |
| 389 if (eloSendQuery(req, reply, fd)) { | |
| 390 #ifdef DEBUG_MOUSE | |
| 391 fprintf(stderr, "Ok, controller configured!\n"); | |
| 392 #endif | |
| 393 } | |
| 394 else { | |
| 395 #ifdef DEBUG_MOUSE | |
| 396 fprintf( stderr, "Unable to ask Elographics touchscreen identification\n"); | |
| 397 #endif | |
| 398 return 0; | |
| 399 } | |
| 400 | |
| 401 memset(req, 0, ELO_PACKET_SIZE); | |
| 402 req[1] = ELO_MODE; | |
| 403 req[3] = ELO_TOUCH_MODE | ELO_STREAM_MODE | ELO_UNTOUCH_MODE; | |
| 404 req[4] = ELO_TRACKING_MODE; | |
| 405 if (!eloSendControl(req, fd)) { | |
| 406 #ifdef DEBUG_MOUSE | |
| 407 fprintf( stderr, "Unable to change Elographics touchscreen operating mode\n"); | |
| 408 #endif | |
| 409 return 0; | |
| 410 } | |
| 411 | |
| 412 memset(req, 0, ELO_PACKET_SIZE); | |
| 413 req[1] = ELO_REPORT; | |
| 414 req[2] = ELO_UNTOUCH_DELAY; | |
| 415 req[3] = ELO_REPORT_DELAY; | |
| 416 if (!eloSendControl(req, fd)) { | |
| 417 #ifdef DEBUG_MOUSE | |
| 418 fprintf( stderr, "Unable to change Elographics touchscreen reports timings\n"); | |
| 419 #endif | |
| 420 return 0; | |
| 421 } | |
| 422 | |
| 423 return 1; | |
| 424 } | |
|
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425 |
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426 int eloReadPosition(_THIS, int fd, int* x, int* y, int* button_state, int* realx, int* realy) { |
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427 unsigned char buffer[ELO_PACKET_SIZE]; |
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428 int pointer = 0; |
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429 int checksum = ELO_INIT_CHECKSUM; |
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430 |
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431 while(pointer < ELO_PACKET_SIZE) { |
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432 if(eloGetPacket(buffer, &pointer, &checksum, fd)) { |
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433 break; |
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434 } |
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435 } |
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436 |
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437 if(!eloParsePacket(buffer, realx, realy, button_state)) { |
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438 return 0; |
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439 } |
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440 |
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441 *x = *realx; |
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442 *y = *realy; |
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443 |
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444 eloConvertXY(this, x, y); |
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445 |
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446 return 1; |
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447 } |