/* $Id$ * $URL$ * * Driver for a Noritake GU128x32-311 graphical display. * * Copyright (C) 2005 Julien Aube * Copyright (C) 2005 The LCD4Linux Team * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ /* * *** Noritake Itron GU128x32-311 *** * A 128x32 VFD (Vacuum Fluorescent Display). * It is driver by a Hitachi microcontroller, with a specific * firmware. * The datasheet can be easily found on the internet by searching for the * the name of the display, it's a PDF file that describe the timing, and * the protocol to communicate with the Hitachi microcontroller. * * The display support 2 modes (that can be mutiplexed), one text mode * thanks to an integrated character generator, and provide 4 lines of * 21 caracters. * There is also a graphical mode that can be used to switch on or off * each one if the 128x32 pixels. (monochrome). * * The protocol include the possibility to clear the display memory quickly, * change the luminosity, swich the display on or off (without affecting the * content of the memory) and finally change the "page" or the caracter * generator. Two pages are available in the ROM, all the characters are * listed in the documentation. * * This driver support only the character mode at the moment. * A future release will support the graphical mode as an option. * * This driver is released under the GPL. */ /* * * exported fuctions: * * struct DRIVER drv_Noritake * */ #include "config.h" #include #include #include #include "debug.h" #include "cfg.h" #include "qprintf.h" #include "plugin.h" #include "widget.h" #include "widget_text.h" #include "widget_icon.h" #include "widget_bar.h" #include "drv.h" #include "udelay.h" #include "drv_generic_text.h" #include "drv_generic_parport.h" static char Name[] = "Noritake"; typedef struct { int type; char *name; int rows; int cols; int xres; int yrex; int goto_cost; int protocol; } MODEL; static int Model, Protocol; static MODEL Models[] = { {0x01, "GU311", 4, 21, 6, 8, 5, 1}, {0x02, "GU311_Graphic", 4, 21, 6, 8, 6, 1}, {0xff, "Unknown", -1, -1, -1, -1, -1, -1} }; static unsigned char SIGNAL_CS; /* Chip select, OUTPUT, negative logic, pport AUTOFEED */ static unsigned char SIGNAL_WR; /* Write OUTPUT, negative logic, pport STOBE */ static unsigned char SIGNAL_RESET; /* Reset, OUTPUT, negative logic, pport INIT */ static unsigned char SIGNAL_BLANK; /* Blank, OUTPUT , negative logic, pport SELECT-IN */ #if 0 static unsigned char SIGNAL_BUSY; /* Busy, INPUT , positive logic, pport BUSY, not used */ static unsigned char SIGNAL_FRP; /* Frame Pulse, INPUT , positive logic, pport ACK, not used */ #endif void (*drv_Noritake_clear) (void); /* Data port is positive logic */ /****************************************/ /*** hardware dependant functions ***/ /****************************************/ /* Low-level parport driving functions */ /* This function was used to pool the BUSY line on the parallel port, which can be linked to the BUSY line on the display. But since it works with a timed wait, this function is not necessary, and is kept just in case.*/ #if 0 static void drv_GU311_wait_busy(void) { char c; c = drv_generic_parport_status(); while ((c & SIGNAL_BUSY) == 0) { ndelay(200); /* Wait 100ns before next consultation of BUSY line if the first one was not successful */ c = drv_generic_parport_status(); } } #endif static void drv_GU311_send_char(char c) { #if 0 /* Disabled because all the cables does not have the busy line linked. */ drv_GU311_wait_busy(); /* ensuite the display is ready to take the command */ #endif drv_generic_parport_data(c); ndelay(30); /* delay to ensure data line stabilisation on long cables */ drv_generic_parport_control(SIGNAL_WR, 0); /* write line to enable */ ndelay(150); /* data hold time */ drv_generic_parport_control(SIGNAL_WR, 0xff); /* write line to disable */ ndelay(75); /* From spec : minimum time before next command */ } static void drv_GU311_send_string(char *str, int size) { int i; for (i = 0; i < size; i++) drv_GU311_send_char(str[i]); } /* Command-string elaboration functions */ static void drv_GU311_make_text_string(const int row, const int col, const char *data, int len) { static char cmd[96] = { 0x01, 'C', 0, 0, 'S', 0 }; unsigned char start_addr; /* Cols are 0x00..0x15, on 4 lines. */ start_addr = (0x16 * row) + col; if (start_addr > 0x57) return; if (len > 0x57) return; cmd[2] = start_addr; cmd[3] = len; memcpy(cmd + 5, data, len); drv_GU311_send_string(cmd, len + 5); } /* API functions */ static void drv_GU311_clear(void) { static char clear_cmd[] = { 0x01, 'O', 'P' }; drv_GU311_send_string(clear_cmd, sizeof(clear_cmd)); ndelay(500); /* Delay for execution - this command is the longuest */ } static void drv_GU311_write(const int row, const int col, const char *data, int len) { drv_GU311_make_text_string(row, col, data, len); } static void drv_GU311_reset(void) { drv_generic_parport_control(SIGNAL_RESET, 0); /* initiate reset */ ndelay(1000); /* reset hold time 1ms */ drv_generic_parport_control(SIGNAL_RESET, 0xff); ndelay(200000); /* reset ready time 200ms */ } static int drv_GU311_start(const char *section) { char cmd[3] = { 0x01, 'O' }; /* Parallel port opening and association */ if (drv_generic_parport_open(section, Name) < 0) return -1; if ((SIGNAL_CS = drv_generic_parport_wire_ctrl("CS", "AUTOFD")) == 0xff) return -1; if ((SIGNAL_WR = drv_generic_parport_wire_ctrl("WR", "STROBE")) == 0xff) return -1; if ((SIGNAL_RESET = drv_generic_parport_wire_ctrl("RESET", "INIT")) == 0xff) return -1; if ((SIGNAL_BLANK = drv_generic_parport_wire_ctrl("BLANK", "SLCTIN")) == 0xff) return -1; /* SIGNAL_BUSY=PARPORT_STATUS_BUSY; *//* Not currently needed */ /* SIGNAL_FRP=PARPORT_STATUS_ACK; *//* Not currently needed */ /* Signals configuration */ drv_generic_parport_direction(0); /* parallel port in output mode */ drv_generic_parport_control(SIGNAL_CS | SIGNAL_WR | SIGNAL_RESET | SIGNAL_BLANK, 0xff); /* All lines to "deactivate", -> 1 level on the wire */ drv_generic_parport_control(SIGNAL_CS, 0); /* CS to 0 all the time, write done by WR */ drv_GU311_reset(); /* Ready for commands from now on. */ /* Display configuration */ cmd[2] = '0'; drv_GU311_send_string(cmd, sizeof(cmd)); /* Select char. page 0 */ cmd[2] = 'Q'; drv_GU311_send_string(cmd, sizeof(cmd)); /* Select 'Quick Mode' */ cmd[2] = 'a'; drv_GU311_send_string(cmd, sizeof(cmd)); /* Brightness at 100% */ cmd[2] = 'T'; drv_GU311_send_string(cmd, sizeof(cmd)); /* Ensure display ON */ drv_Noritake_clear(); return 0; } static int drv_Noritake_start(const char *section) { char *model = 0; int i; model = cfg_get(section, "Model", NULL); if (model != NULL && *model != '\0') { for (i = 0; Models[i].type != 0xff; i++) { if (strcasecmp(Models[i].name, model) == 0) break; } if (Models[i].type == 0xff) { error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source()); return -1; } Model = i; info("%s: using model '%s'", Name, Models[Model].name); } else { error("%s: no '%s.Model' entry from %s", Name, section, cfg_source()); return -1; } DROWS = Models[Model].rows; DCOLS = Models[Model].cols; XRES = Models[Model].xres; YRES = Models[Model].xres; GOTO_COST = Models[Model].goto_cost; Protocol = Models[Model].protocol; /* display preferences */ CHARS = 0; /* number of user-defineable characters */ CHAR0 = 0; /* ASCII of first user-defineable char */ /* real worker functions */ drv_Noritake_clear = drv_GU311_clear; if (Models[Model].type == 0x01) { drv_generic_text_real_write = drv_GU311_write; } else { error("%s: Unsupported display. Currently supported are : GU311.", Name); return -1; } return drv_GU311_start(section); } /****************************************/ /*** plugins ***/ /****************************************/ /* none */ /****************************************/ /*** widget callbacks ***/ /****************************************/ /* using drv_generic_text_draw(W) */ /****************************************/ /*** exported functions ***/ /****************************************/ /* list models */ int drv_Noritake_list(void) { printf("GU311 GU311_Graphic"); return 0; } /* initialize driver & display */ int drv_Noritake_init(const char *section, const int quiet) { WIDGET_CLASS wc; int ret; info("%s: %s", Name, "$Rev$"); /* start display */ if ((ret = drv_Noritake_start(section)) != 0) return ret; /* initialize generic text driver */ if ((ret = drv_generic_text_init(section, Name)) != 0) return ret; /* register text widget */ wc = Widget_Text; wc.draw = drv_generic_text_draw; widget_register(&wc); /* register plugins */ /* none */ if (!quiet) { char buffer[40]; qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); if (drv_generic_text_greet(buffer, NULL)) { sleep(3); drv_Noritake_clear(); } } return 0; } /* close driver & display */ int drv_Noritake_quit(const int quiet) { info("%s: shutting down.", Name); /* clear display */ drv_Noritake_clear(); /* say goodbye... */ if (!quiet) { drv_generic_text_greet("goodbye!", NULL); } drv_generic_parport_close(); drv_generic_text_quit(); return (0); } DRIVER drv_Noritake = { .name = Name, .list = drv_Noritake_list, .init = drv_Noritake_init, .quit = drv_Noritake_quit, }; ='n246' href='#n246'>246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589