/* $Id: Crystalfontz.c,v 1.10 2003/07/24 04:48:09 reinelt Exp $ * * driver for display modules from Crystalfontz * * Copyright 2000 by Herbert Rosmanith (herp@wildsau.idv.uni-linz.ac.at) * * This program 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. * * This program 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. * * $Log: Crystalfontz.c,v $ * Revision 1.10 2003/07/24 04:48:09 reinelt * 'soft clear' needed for virtual rows * * Revision 1.9 2003/02/22 07:53:09 reinelt * cfg_get(key,defval) * * Revision 1.8 2002/08/19 04:41:20 reinelt * introduced bar.c, moved bar stuff from display.h to bar.h * * Revision 1.7 2001/04/27 05:04:57 reinelt * * replaced OPEN_MAX with sysconf() * replaced mktemp() with mkstemp() * unlock serial port if open() fails * * Revision 1.6 2001/02/13 09:00:13 reinelt * * prepared framework for GPO's (general purpose outputs) * * Revision 1.5 2000/08/10 09:44:09 reinelt * * new debugging scheme: error(), info(), debug() * uses syslog if in daemon mode * * Revision 1.4 2000/08/09 09:50:29 reinelt * * opened 0.98 development * removed driver-specific signal-handlers * added 'quit'-function to driver structure * added global signal-handler * * Revision 1.3 2000/06/04 21:43:50 herp * minor bugfix (zero length) * * */ #include #include #include #include #include #include #include #include "debug.h" #include "cfg.h" #include "lock.h" #include "display.h" #include "bar.h" #include "Crystalfontz.h" #define XRES 6 #define YRES 8 #define BARS ( BAR_L | BAR_R | BAR_H2 ) static LCD Lcd; static char *Port=NULL; static speed_t Speed; static int Device=-1; static char *Txtbuf,*BackupTxtbuf; /* text (+backup) buffer */ static char *Barbuf,*BackupBarbuf; /* bar (+backup) buffer */ static char *CustCharMap; static int tdim,bdim; /* text/bar dimension */ static char isTxtDirty; static char *isBarDirty; static char isAnyBarDirty; int cryfonquit(void) { debug ("closing port %s", Port); close(Device); unlock_port(Port); exit(0); } static int cryfonopen() { int fd; pid_t pid; struct termios portset; if ((pid=lock_port(Port))!=0) { if (pid==-1) error ("Crystalfontz: port %s could not be locked",Port); else error ("Crystalfontz: port %s is locked by process %d",Port,pid); return -1; } fd=open(Port,O_RDWR|O_NOCTTY|O_NDELAY); if (fd==-1) { error ("Crystalfontz: open(%s) failed: %s", Port, strerror(errno)); unlock_port(Port); return -1; } if (tcgetattr(fd,&portset)==-1) { error ("Crystalfontz: tcgetattr(%s) failed: %s", Port, strerror(errno)); unlock_port(Port); return -1; } cfmakeraw(&portset); cfsetospeed(&portset,Speed); if (tcsetattr(fd, TCSANOW, &portset)==-1) { error ("Crystalfontz: tcsetattr(%s) failed: %s", Port, strerror(errno)); unlock_port(Port); return -1; } return fd; } int cryfoninit(LCD *Self) { char *port; char *speed; char *backlight; char *contrast; char cmd_backlight[2]={ CRYFON_BACKLIGHT_CTRL, }; char cmd_contrast[2]={ CRYFON_CONTRAST_CTRL, }; Lcd=*Self; if (Port) { free(Port); Port=NULL; } if ((port=cfg_get("Port",NULL))==NULL || *port=='\0') { error ("CrystalFontz: no 'Port' entry in %s", cfg_file()); return -1; } if (port[0]=='/') Port=strdup(port); else { Port=(char *)malloc(5/*/dev/ */+strlen(port)+1); sprintf(Port,"/dev/%s",port); } speed=cfg_get("Speed","9600"); switch(atoi(speed)) { case 1200: Speed=B1200; break; case 2400: Speed=B2400; break; case 9600: Speed=B9600; break; case 19200: Speed=B19200; break; default: error ("CrystalFontz: unsupported speed '%s' in '%s'", speed, cfg_file()); return -1; } debug ("using port %s at %d baud", Port, atoi(speed)); if ((Device=cryfonopen())==-1) return -1; tdim=Lcd.rows*Lcd.cols; bdim=Lcd.rows*Lcd.cols*2; Txtbuf=(char *)malloc(tdim); if (Txtbuf==NULL) { error ("CrystalFontz: out of memory"); return -1; } CustCharMap=(char *)malloc(tdim); if (CustCharMap==NULL) { error ("CrystalFontz: out of memory"); return -1; } BackupTxtbuf=(char *)malloc(tdim); if (BackupTxtbuf==NULL) { error ("CrystalFontz: out of memory"); return -1; } Barbuf=(char *)malloc(bdim); if (Barbuf==NULL) { error ("CrystalFontz: out of memory"); return -1; } BackupBarbuf=(char *)malloc(bdim); if (BackupBarbuf==NULL) { error ("CrystalFontz: out of memory"); return -1; } isBarDirty=(char *)malloc(Lcd.rows); if (isBarDirty==NULL) { error ("CrystalFontz: out of memory"); return -1; } memset(Txtbuf,' ',tdim); memset(CustCharMap,-1,tdim); memset(BackupTxtbuf,255,tdim); memset(Barbuf,0,bdim); memset(BackupBarbuf,0,bdim); memset(isBarDirty,0,Lcd.rows); isAnyBarDirty=0; isTxtDirty=0; usleep(350000); write(Device, CRYFON_HIDE_CURSOR CRYFON_SCROLL_OFF CRYFON_WRAP_OFF,3); backlight=cfg_get("Backlight",NULL); if (backlight) { cmd_backlight[1]=atoi(backlight); write(Device,cmd_backlight,4); } contrast=cfg_get("Contrast",NULL); if (contrast) { cmd_contrast[1]=atoi(contrast); write(Device,cmd_contrast,2); } return 0; } int cryfonclear(int full) { memset(Txtbuf,' ',tdim); memset(Barbuf,0,bdim); return 0; } int cryfonput(int row,int col,char *text) { int pos; pos=row*Lcd.cols+col; memcpy(Txtbuf+pos,text,strlen(text)); isTxtDirty|=memcmp(Txtbuf+pos,BackupTxtbuf+pos,strlen(text)); return 0; } static unsigned char p1[] = { 0x3f,0x1f,0x0f,0x07,0x03,0x01,0x00 }; static unsigned char p2[] = { 0x00,0x20,0x30,0x38,0x3c,0x3e,0x3f }; static void blacken(int bitfrom,int len,int pos,int startbyte,int endbyte) { if (len<1) return; if (startbyte==endbyte) Barbuf[pos] |= (p1[bitfrom%XRES] & p2[1+((bitfrom+len-1)%XRES)]); else { int n; Barbuf[pos] |= p1[bitfrom%XRES]; n=endbyte-startbyte-1; if (n>0) memset(Barbuf+pos+1,0x3f,n); Barbuf[pos+n+1] |= p2[1+((bitfrom+len-1)%XRES)]; } } static void whiten(int bitfrom,int len,int pos,int startbyte,int endbyte) { if (len<1) return; if (startbyte==endbyte) Barbuf[pos] &= (p2[bitfrom%XRES] | p1[1+((bitfrom+len-1)%XRES)]); else { int n; Barbuf[pos] &= p2[bitfrom%XRES]; n=endbyte-startbyte-1; if (n>0) memset(Barbuf+pos+1,0x00,n); Barbuf[pos+n+1] &= p1[1+((bitfrom+len-1)%XRES)]; } } int cryfonbar(int type,int row,int col,int max,int len1,int len2) { int endb,maxb; int bitfrom; int pos; if (len1<1) len1=1; else if (len1>max) len1=max; if (len2<1) len2=1; else if (len2>max) len2=max; bitfrom=col*XRES; endb=(bitfrom+len1-1)/XRES; pos=row*Lcd.cols*2; switch(type) { case BAR_L: blacken(bitfrom,len1,pos+col,col,endb); endb=(bitfrom+len1)/XRES; maxb=(bitfrom+max-1)/XRES; whiten(bitfrom+len1,max-len1,pos+endb,endb,maxb); if (len1==len2) memcpy(Barbuf+pos+col+Lcd.cols, Barbuf+pos+col, maxb-col+1); else { pos+=Lcd.cols; endb=(bitfrom+len2-1)/XRES; blacken(bitfrom,len2,pos+col,col,endb); endb=(bitfrom+len2)/XRES; whiten(bitfrom+len2,max-len2,pos+endb,endb,maxb); } break; case BAR_R: blacken(bitfrom,len1,pos+col,col,endb); endb=(bitfrom+len1)/XRES; maxb=(bitfrom+max-1)/XRES; whiten(bitfrom+len1,max-len1,pos+endb,endb,maxb); if (len1==len2) memcpy(Barbuf+pos+col+Lcd.cols, Barbuf+pos+col, maxb-col+1); else { pos+=Lcd.cols; endb=(bitfrom+len2-1)/XRES; blacken(bitfrom,len2,pos+col,col,endb); endb=(bitfrom+len2)/XRES; whiten(bitfrom+len2,max-len2,pos+endb,endb,maxb); } break; } isBarDirty[row]=1; isAnyBarDirty=1; /* dont know exactly, check anyway */ return 0; } static int txt_lc=-1,txt_lr=-1; static void writeTxt(char r,char c,int itxt,int len) { static char cmd_goto[3]=CRYFON_GOTO; if (txt_lr!=r || txt_lc!=c) { if (r==0 && c==0) write(Device,CRYFON_HOME,1); else { cmd_goto[1]=(unsigned char)c; cmd_goto[2]=(unsigned char)r; write(Device,(char *)&cmd_goto,3); } } txt_lr=r; txt_lc=c+len; write(Device,Txtbuf+itxt,len); } static void writeTxtDiff() { int spos,scol; int i,j,k; k=0; txt_lr=txt_lc=-1; for (i=0;i-1) { writeTxt((char)i,(char)scol,spos,k-spos); memcpy(BackupTxtbuf+spos,Txtbuf+spos,k-spos); spos=-1; } k++; } if (spos>-1) { writeTxt((char)i,(char)scol,spos,k-spos); memcpy(BackupTxtbuf+spos,Txtbuf+spos,k-spos); } } } /* private bar flushing routines */ static char BarCharBuf[256]; static int bi=0; static void flushBarCharBuf() { if (bi) { write(Device,BarCharBuf,bi); /* flush buffer */ tcdrain(Device); bi=0; } } static void writeBarCharBuf(char *s,int len) { if (bi+len>=sizeof(BarCharBuf)) { flushBarCharBuf(); } memcpy(BarCharBuf+bi,s,len); bi+=len; } static struct { char use_count; /* 0 - unused */ char data[8]; } cust_chars[8] = { { 0, }, { 0, }, { 0, }, { 0, }, { 0, }, { 0, }, { 0, }, { 0, } }; static int search_cust_char(char c1,char c2) { int i; for (i=0;i<8;i++) { if (cust_chars[i].data[0]==c1 && cust_chars[i].data[4]==c2) { return i; } } return -1; /* not found */ } static void set_cust_char(int ci,char c1,char c2) { static char cmd_cust[10] = CRYFON_SET_CUSTOM_CHAR_BITMAP; memset(cust_chars[ci].data,c1,4); memset(cust_chars[ci].data+4,c2,4); cmd_cust[1]=ci; memset(cmd_cust+2,c1,4); memset(cmd_cust+6,c2,4); writeBarCharBuf(cmd_cust,10); } static int alloc_cust_char(char c1,char c2) { static char allzero[8]={0, }; int i; /* first, try to allocate a never used entry */ for(i=0;i<8;i++) if (memcmp(cust_chars[i].data,allzero,8)==0) { set_cust_char(i,c1,c2); return i; } /* if that fails, pick an entry with is not yet in use */ for(i=0;i<8;i++) if (cust_chars[i].use_count==0) { set_cust_char(i,c1,c2); return i; } return -1; /* no free char */ } static void use_cust_char(int i,int j,int ci) { int x; x=i*Lcd.cols+j; if (CustCharMap[x]==-1) { cust_chars[ci].use_count++; CustCharMap[x]=ci; } /* else: internal consistency failure */ else { error ("Crystalfontz: internal consistency failure 1"); exit(0); } } static void unuse_cust_char(int i,int j) { int ci,x; x=i*Lcd.cols+j; ci=CustCharMap[x]; if (ci>-1) { CustCharMap[x]=-1; cust_chars[ci].use_count--; if (cust_chars[i].use_count==-1) { error ("Crystalfontz: internal consistency failure 2"); exit(0); } } } static int bar_lc=-1,bar_lr=-1; static void writeChar(unsigned char r,unsigned char c,unsigned char ch) { static char cmd_goto[3]=CRYFON_GOTO; if (bar_lr!=r || bar_lc!=c) { if (r==0 && c==0) writeBarCharBuf(CRYFON_HOME,1); else { cmd_goto[1]=(unsigned char)c; cmd_goto[2]=(unsigned char)r; writeBarCharBuf((char *)&cmd_goto,3); } } bar_lr=r; bar_lc=c++; writeBarCharBuf(&ch,1); } static void writeBarDiff() { char c1,c2; int i,j,k1,k2,ci; for (i=0;i-1) { /* found: reuse that char */ unuse_cust_char(i,j); writeChar(i,j,128+ci); use_cust_char(i,j,ci); } else { /* not found: get a new one */ ci=alloc_cust_char(c1,c2); if (ci>-1) { unuse_cust_char(i,j); writeChar(i,j,128+ci); use_cust_char(i,j,ci); } else error ("failed to alloc a custom char"); } } BackupBarbuf[k1]=c1; BackupBarbuf[k2]=c2; } k1++; k2++; } } isBarDirty[i]=0; } flushBarCharBuf(); } int cryfonflush() { if (isTxtDirty) { writeTxtDiff(); isTxtDirty=0; } if (isAnyBarDirty) { writeBarDiff(); isAnyBarDirty=0; } return 0; } LCD Crystalfontz[] = { { "626",2,16,XRES,YRES,BARS,0,cryfoninit,cryfonclear,cryfonput,cryfonbar,NULL,cryfonflush,cryfonquit }, { "636",2,16,XRES,YRES,BARS,0,cryfoninit,cryfonclear,cryfonput,cryfonbar,NULL,cryfonflush,cryfonquit }, { "632",2,16,XRES,YRES,BARS,0,cryfoninit,cryfonclear,cryfonput,cryfonbar,NULL,cryfonflush,cryfonquit }, { "634",4,20,XRES,YRES,BARS,0,cryfoninit,cryfonclear,cryfonput,cryfonbar,NULL,cryfonflush,cryfonquit }, { NULL } }; 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826