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-rw-r--r--USBLCD.c446
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-/* $Id: USBLCD.c,v 1.21 2004/01/30 20:57:55 reinelt Exp $
- *
- * Driver for USBLCD (see http://www.usblcd.de)
- *
- * Copyright 2002 Robin Adams, Adams IT Services <info@usblcd.de>
- *
- * This driver is based on HD44780.c, which is
- * 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: USBLCD.c,v $
- * Revision 1.21 2004/01/30 20:57:55 reinelt
- * HD44780 patch from Martin Hejl
- * dmalloc integrated
- *
- * Revision 1.20 2004/01/09 04:16:06 reinelt
- * added 'section' argument to cfg_get(), but NULLed it on all calls by now.
- *
- * Revision 1.19 2004/01/06 22:33:14 reinelt
- * Copyright statements cleaned up
- *
- * Revision 1.18 2003/10/05 17:58:50 reinelt
- * libtool junk; copyright messages cleaned up
- *
- * Revision 1.17 2003/09/11 04:09:53 reinelt
- * minor cleanups
- *
- * Revision 1.16 2003/09/10 03:48:23 reinelt
- * Icons for M50530, new processing scheme (Ticks.Text...)
- *
- * Revision 1.15 2003/09/09 11:47:47 reinelt
- * basic icon support for HD44780
- *
- * Revision 1.14 2003/09/09 06:54:43 reinelt
- * new function 'cfg_number()'
- *
- * Revision 1.13 2003/09/09 05:30:34 reinelt
- * even more icons stuff
- *
- * 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 2003/07/24 04:48:09 reinelt
- * 'soft clear' needed for virtual rows
- *
- * Revision 1.9 2003/04/04 06:01:59 reinelt
- * new parallel port abstraction scheme
- *
- * Revision 1.8 2003/02/22 07:53:10 reinelt
- * cfg_get(key,defval)
- *
- * Revision 1.7 2002/08/19 09:11:34 reinelt
- * changed HD44780 to use generic bar functions
- *
- * Revision 1.6 2002/08/19 07:52:19 reinelt
- * corrected type declaration of (*defchar)()
- *
- * Revision 1.5 2002/08/19 07:36:29 reinelt
- *
- * finished bar.c, USBLCD is the first driver that uses the generic bar functions
- *
- * Revision 1.4 2002/08/19 04:41:20 reinelt
- * introduced bar.c, moved bar stuff from display.h to bar.h
- *
- * Revision 1.3 2002/08/18 08:11:11 reinelt
- * USBLCD buffered I/O
- *
- * Revision 1.2 2002/08/17 14:14:21 reinelt
- *
- * USBLCD fixes
- *
- * Revision 1.0 2002/07/08 12:16:10 radams
- *
- * first version of the USBLCD driver
- *
- */
-
-/*
- *
- * exported fuctions:
- *
- * struct LCD UDBLCD[]
- *
- */
-
-#include "config.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <time.h>
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-
-#include <sys/time.h>
-
-#include "debug.h"
-#include "cfg.h"
-#include "display.h"
-#include "icon.h"
-#include "bar.h"
-
-#ifdef WITH_DMALLOC
-#include <dmalloc.h>
-#endif
-
-#define GET_HARD_VERSION 1
-#define GET_DRV_VERSION 2
-
-#define XRES 5
-#define YRES 8
-#define CHARS 8
-
-static LCD Lcd;
-static char *Port=NULL;
-static int usblcd_file;
-static int Icons;
-
-static char *FrameBuffer1=NULL;
-static char *FrameBuffer2=NULL;
-
-static unsigned char *Buffer;
-static unsigned char *BufPtr;
-
-static void USBLCD_send ()
-{
- // struct timeval now, end;
- // gettimeofday (&now, NULL);
-
- write(usblcd_file,Buffer,BufPtr-Buffer);
-
- // gettimeofday (&end, NULL);
- // debug ("send %d: %d usec (%d usec/byte)", BufPtr-Buffer, 1000000*(end.tv_sec-now.tv_sec)+end.tv_usec-now.tv_usec, (1000000*(end.tv_sec-now.tv_sec)+end.tv_usec-now.tv_usec)/(BufPtr-Buffer));
-
- BufPtr=Buffer;
-
-}
-
-
-static void USBLCD_command (unsigned char cmd)
-{
- *BufPtr++='\0';
- *BufPtr++=cmd;
-}
-
-static void USBLCD_write (char *string, int len)
-{
- while (len--) {
- if(*string==0) *BufPtr++=*string;
- *BufPtr++=*string++;
- }
-}
-
-
-static int USBLCD_open (void)
-{
- char buf[128];
- int major,minor;
-
- usblcd_file=open(Port,O_WRONLY);
- if (usblcd_file==-1) {
- error ("USBLCD: open(%s) failed: %s", Port, strerror(errno));
- return -1;
- }
-
- memset(buf,0,sizeof(buf));
- if (ioctl(usblcd_file,GET_DRV_VERSION, buf)!=0) {
- error ("USBLCD: ioctl() failed, could not get Driver Version!");
- return -2;
- }
- debug("Driver Version: %s",buf);
-
- if (sscanf(buf,"USBLCD Driver Version %d.%d",&major,&minor)!=2) {
- error("USBLCD: could not read Driver Version!");
- return -4;
- }
- if (major!=1) {
- error("USBLCD: Driver Version not supported!");
- return -4;
- }
-
- memset(buf,0,sizeof(buf));
- if (ioctl(usblcd_file,GET_HARD_VERSION, buf)!=0) {
- error ("USBLCD: ioctl() failed, could not get Hardware Version!");
- return -3;
- }
- debug("Hardware Version: %s",buf);
-
- if (sscanf(buf,"%d.%d",&major,&minor)!=2) {
- error("USBLCD: could not read Hardware Version!");
- return -4;
- };
- if (major!=1) {
- error("USBLCD: Hardware Version not supported!");
- return -4;
- }
-
- BufPtr=Buffer;
-
- USBLCD_command (0x29); // 8 Bit mode, 1/16 duty cycle, 5x8 font
- USBLCD_command (0x08); // Display off, cursor off, blink off
- USBLCD_command (0x0c); // Display on, cursor off, blink off
- USBLCD_command (0x06); // curser moves to right, no shift
-
- return 0;
-}
-
-static void USBLCD_define_char (int ascii, char *buffer)
-{
- USBLCD_command (0x40|8*ascii);
- USBLCD_write (buffer, 8);
-}
-
-
-int USBLCD_clear (int full)
-{
-
- memset (FrameBuffer1, ' ', Lcd.rows*Lcd.cols*sizeof(char));
-
- icon_clear();
- bar_clear();
-
- if (full) {
- memset (FrameBuffer2, ' ', Lcd.rows*Lcd.cols*sizeof(char));
- USBLCD_command (0x01); // clear display
- }
-
- return 0;
-}
-
-
-int USBLCD_init (LCD *Self)
-{
- int rows=-1, cols=-1 ;
- char *port, *s;
-
- if (Port) {
- free(Port);
- Port=NULL;
- }
- if ((port=cfg_get(NULL, "Port", NULL))==NULL || *port=='\0') {
- error ("USBLCD: no 'Port' entry in %s", cfg_source());
- return -1;
- }
- if (port[0]=='/') {
- Port=strdup(port);
- } else {
- Port=(char *)malloc(5/*/dev/ */+strlen(port)+1);
- sprintf(Port,"/dev/%s",port);
- }
-
- debug ("using device %s ", Port);
-
- s=cfg_get(NULL, "Size", NULL);
- if (s==NULL || *s=='\0') {
- error ("USBLCD: no 'Size' entry in %s", cfg_source());
- return -1;
- }
- if (sscanf(s,"%dx%d",&cols,&rows)!=2 || rows<1 || cols<1) {
- error ("USBLCD: bad size '%s'",s);
- return -1;
- }
-
- Self->rows=rows;
- Self->cols=cols;
- Lcd=*Self;
-
- // Init the command buffer
- Buffer = (char*)malloc(1024);
- if (Buffer==NULL) {
- error ("USBLCD: coommand buffer could not be allocated: malloc() failed");
- return -1;
- }
-
- // 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 ("USBLCD: framebuffer could not be allocated: malloc() failed");
- return -1;
- }
-
- if (USBLCD_open()!=0)
- return -1;
-
- 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, USBLCD_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
- bar_add_segment(255,255,255,255); // ASCII 255 = block
-
- USBLCD_clear(1);
- USBLCD_send();
-
- return 0;
-}
-
-
-void USBLCD_goto (int row, int col)
-{
- int pos=(row%2)*64+(row/2)*20+col;
- USBLCD_command (0x80|pos);
-}
-
-
-int USBLCD_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 USBLCD_bar (int type, int row, int col, int max, int len1, int len2)
-{
- return bar_draw (type, row, col, max, len1, len2);
-}
-
-
-int USBLCD_icon (int num, int seq, int row, int col)
-{
- return icon_draw (num, seq, row, col);
-}
-
-
-int USBLCD_flush (void)
-{
- int row, col, pos1, pos2;
- int c, equal;
-
- bar_process(USBLCD_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) {
- 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;
- USBLCD_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;
- }
- }
- USBLCD_write (FrameBuffer1+row*Lcd.cols+pos1, pos2-pos1+1);
- }
- }
-
- USBLCD_send();
-
- memcpy (FrameBuffer2, FrameBuffer1, Lcd.rows*Lcd.cols*sizeof(char));
-
- return 0;
-}
-
-
-int USBLCD_quit (void)
-{
- info("USBLCD: shutting down.");
- USBLCD_send();
-
- debug ("closing port %s", Port);
- close(usblcd_file);
-
- if (Buffer) {
- free(Buffer);
- Buffer=NULL;
- }
-
- if (FrameBuffer1) {
- free(FrameBuffer1);
- FrameBuffer1=NULL;
- }
-
- if (FrameBuffer2) {
- free(FrameBuffer2);
- FrameBuffer2=NULL;
- }
-
- return 0;
-}
-
-
-LCD USBLCD[] = {
- { name: "USBLCD",
- rows: 0,
- cols: 0,
- xres: XRES,
- yres: YRES,
- bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
- icons: 0,
- gpos: 0,
- init: USBLCD_init,
- clear: USBLCD_clear,
- put: USBLCD_put,
- bar: USBLCD_bar,
- icon: USBLCD_icon,
- gpo: NULL,
- flush: USBLCD_flush,
- quit: USBLCD_quit
- },
- { NULL }
-};
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