linux-dvb-apps.git - linux-dvb-apps Debian packaging

Age	Commit message (Expand)	Author	Files	Lines
2013-09-03	Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207	etobi	1	-0/+4

/* $Id: M50530.c,v 1.17 2004/01/09 04:16:06 reinelt Exp $ * * driver for display modules based on the M50530 chip * * Copyright 1999, 2000 Michael Reinelt <reinelt@eunet.at> * * 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. * * * $Log: M50530.c,v $ * Revision 1.17 2004/01/09 04:16:06 reinelt * added 'section' argument to cfg_get(), but NULLed it on all calls by now. * * Revision 1.16 2003/10/05 17:58:50 reinelt * libtool junk; copyright messages cleaned up * * Revision 1.15 2003/09/11 04:09:53 reinelt * minor cleanups * * Revision 1.14 2003/09/10 03:48:22 reinelt * Icons for M50530, new processing scheme (Ticks.Text...) * * Revision 1.13 2003/09/09 06:54:43 reinelt * new function 'cfg_number()' * * Revision 1.12 2003/08/24 05:17:58 reinelt * liblcd4linux patch from Patrick Schemitz * * Revision 1.11 2003/08/16 07:31:35 reinelt * double buffering in all drivers * * Revision 1.10 2003/08/15 07:54:07 reinelt * HD44780 4 bit mode implemented * * Revision 1.9 2003/07/24 04:48:09 reinelt * 'soft clear' needed for virtual rows * * Revision 1.8 2003/04/07 06:02:59 reinelt * further parallel port abstraction * * Revision 1.7 2003/04/04 06:01:59 reinelt * new parallel port abstraction scheme * * Revision 1.6 2003/02/22 07:53:10 reinelt * cfg_get(key,defval) * * Revision 1.5 2002/08/19 10:51:06 reinelt * M50530 driver using new generic bar functions * * Revision 1.4 2002/08/19 07:36:29 reinelt * * finished bar.c, USBLCD is the first driver that uses the generic bar functions * * Revision 1.3 2002/08/19 04:41:20 reinelt * introduced bar.c, moved bar stuff from display.h to bar.h * * Revision 1.2 2002/04/30 07:20:15 reinelt * * implemented the new ndelay(nanoseconds) in all parallel port drivers * * Revision 1.1 2001/09/11 05:31:37 reinelt * M50530 driver * * */ /* * * exported fuctions: * * struct LCD M50530[] * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include "debug.h" #include "cfg.h" #include "display.h" #include "bar.h" #include "icon.h" #include "parport.h" #include "udelay.h" #define XRES 5 #define YRES 8 #define CHARS 8 static LCD Lcd; static int GPO=0; static int Icons; static char *FrameBuffer1=NULL; static char *FrameBuffer2=NULL; static unsigned char SIGNAL_EX; static unsigned char SIGNAL_IOC1; static unsigned char SIGNAL_IOC2; static unsigned char SIGNAL_GPO; static void M5_command (unsigned int cmd, int delay) { // put data on DB1..DB8 parport_data (cmd&0xff); // set I/OC1 (Select inverted) // set I/OC2 (AutoFeed inverted) parport_control (SIGNAL_IOC1|SIGNAL_IOC2, (cmd&0x200?SIGNAL_IOC1:0) | (cmd&0x100?SIGNAL_IOC2:0)); // Control data setup time ndelay(200); // send command // EX signal pulse width = 500ns // Fixme: why 500 ns? Datasheet says 200ns parport_toggle (SIGNAL_EX, 1, 500); // wait udelay(delay); } static void M5_write (unsigned char *string, int len) { unsigned int cmd; while (len--) { cmd=*string++; M5_command (0x100|cmd, 20); } } static void M5_setGPO (int bits) { if (Lcd.gpos>0) { // put data on DB1..DB8 parport_data (bits); // 74HCT573 set-up time ndelay(20); // send data // 74HCT573 enable pulse width = 24ns parport_toggle (SIGNAL_GPO, 1, 24); } } static void M5_define_char (int ascii, char *buffer) { M5_command (0x300+192+8*ascii, 20); M5_write (buffer, 8); } int M5_clear (int full) { memset (FrameBuffer1, ' ', Lcd.rows*Lcd.cols*sizeof(char)); icon_clear(); bar_clear(); GPO=0; if (full) { memset (FrameBuffer2, ' ', Lcd.rows*Lcd.cols*sizeof(char)); M5_command (0x0001, 1250); // clear display M5_setGPO (GPO); // All GPO's off } return 0; } int M5_init (LCD *Self) { int rows=-1, cols=-1, gpos=-1; char *s; s=cfg_get(NULL, "Size", NULL); if (s==NULL || *s=='\0') { error ("M50530: no 'Size' entry in %s", cfg_source()); return -1; } if (sscanf(s,"%dx%d",&cols,&rows)!=2 || rows<1 || cols<1) { error ("M50530: bad size '%s'",s); return -1; } if (cfg_number(NULL, "GPOs", 0, 0, 8, &gpos)<0) return -1; Self->rows=rows; Self->cols=cols; Self->gpos=gpos; Lcd=*Self; // Init the framebuffers FrameBuffer1 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char)); FrameBuffer2 = (char*)malloc(Lcd.cols*Lcd.rows*sizeof(char)); if (FrameBuffer1==NULL || FrameBuffer2==NULL) { error ("HD44780: framebuffer could not be allocated: malloc() failed"); return -1; } if ((SIGNAL_EX = parport_wire_ctrl ("EX", "STROBE"))==0xff) return -1; if ((SIGNAL_IOC1 = parport_wire_ctrl ("IOC1", "SELECT"))==0xff) return -1; if ((SIGNAL_IOC2 = parport_wire_ctrl ("IOC2", "AUTOFD"))==0xff) return -1; if ((SIGNAL_GPO = parport_wire_ctrl ("GPO", "INIT") )==0xff) return -1; if (parport_open() != 0) { error ("M50530: could not initialize parallel port!"); return -1; } // set direction: write parport_direction (0); // initialize display M5_command (0x00FA, 20); // set function mode M5_command (0x0020, 20); // set display mode M5_command (0x0050, 20); // set entry mode M5_command (0x0030, 20); // set display mode if (cfg_number(NULL, "Icons", 0, 0, CHARS, &Icons)<0) return -1; if (Icons>0) { debug ("reserving %d of %d user-defined characters for icons", Icons, CHARS); icon_init(Lcd.rows, Lcd.cols, XRES, YRES, CHARS, Icons, M5_define_char); Self->icons=Icons; Lcd.icons=Icons; } bar_init(rows, cols, XRES, YRES, CHARS-Icons); bar_add_segment(0,0,255,32); // ASCII 32 = blank M5_clear(1); return 0; } void M5_goto (int row, int col) { int pos; pos=row*48+col; if (row>3) pos-=168; M5_command (0x300|pos, 20); } int M5_put (int row, int col, char *text) { char *p=FrameBuffer1+row*Lcd.cols+col; char *t=text; while (*t && col++<=Lcd.cols) { *p++=*t++; } return 0; } int M5_bar (int type, int row, int col, int max, int len1, int len2) { return bar_draw (type, row, col, max, len1, len2); } int M5_icon (int num, int seq, int row, int col) { return icon_draw (num, seq, row, col); } int M5_gpo (int num, int val) { if (num>=Lcd.gpos) return -1; if (val) { GPO |= 1<<num; // set bit } else { GPO &= ~(1<<num); // clear bit } return 0; } int M5_flush (void) { int row, col, pos1, pos2; int c, equal; bar_process(M5_define_char); for (row=0; row<Lcd.rows; row++) { for (col=0; col<Lcd.cols; col++) { c=bar_peek(row, col); if (c==-1) c=icon_peek(row, col); if (c!=-1) { if (c!=32) c+=248; //blank FrameBuffer1[row*Lcd.cols+col]=(char)c; } } for (col=0; col<Lcd.cols; col++) { if (FrameBuffer1[row*Lcd.cols+col]==FrameBuffer2[row*Lcd.cols+col]) continue; M5_goto (row, col); for (pos1=col++, pos2=pos1, equal=0; col<Lcd.cols; col++) { if (FrameBuffer1[row*Lcd.cols+col]==FrameBuffer2[row*Lcd.cols+col]) { // If we find just one equal byte, we don't break, because this // would require a goto, which takes one byte, too. if (++equal>2) break; } else { pos2=col; equal=0; } } M5_write (FrameBuffer1+row*Lcd.cols+pos1, pos2-pos1+1); } } memcpy (FrameBuffer2, FrameBuffer1, Lcd.rows*Lcd.cols*sizeof(char)); M5_setGPO(GPO); return 0; } int M5_quit (void) { info("M50530: shutting down."); if (FrameBuffer1) { free(FrameBuffer1); FrameBuffer1=NULL; } if (FrameBuffer2) { free(FrameBuffer2); FrameBuffer2=NULL; } return parport_close(); } LCD M50530[] = { { name: "M50530", rows: 0, cols: 0, xres: XRES, yres: YRES, bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2, icons: 0, gpos: 0, init: M5_init, clear: M5_clear, put: M5_put, bar: M5_bar, icon: M5_icon, gpo: M5_gpo, flush: M5_flush, quit: M5_quit }, { NULL } };