yan/archived-lcd4linux
1
0
Fork 0
mirror of https://github.com/netfun2000/lcd4linux.git synced 2026-02-27 09:44:34 +08:00
Code Issues Packages Projects Releases Wiki Activity
Files
d72755a9609479f9b3463a96c3a71fd7084f2fb3
archived-lcd4linux/USBLCD.c
reinelt d72755a960 [lcd4linux @ 2002-08-19 04:41:20 by reinelt] 
introduced bar.c, moved bar stuff from display.h to bar.h

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@158 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
2002-08-19 04:41:20 +00:00

568 lines
12 KiB
C
Raw Blame History

/* $Id: USBLCD.c,v 1.4 2002/08/19 04:41:20 reinelt Exp $
*
* Driver for USBLCD ( see http://www.usblcd.de )
* This Driver is based on HD44780.c
*
* Copyright 2002 by Robin Adams, Adams IT Services ( info@usblcd.de )
* Copyright 1999, 2000 by Michael Reinelt (reinelt@eunet.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: USBLCD.c,v $
* 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 "bar.h"
#include "udelay.h"
#define GET_HARD_VERSION 1
#define GET_DRV_VERSION 2
#define XRES 5
#define YRES 8
#define CHARS 8
#define BARS ( BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2 )
typedef struct {
int len1;
int len2;
int type;
int segment;
} BAR;
typedef struct {
int len1;
int len2;
int type;
int used;
int ascii;
} SEGMENT;
static LCD Lcd;
int usblcd_file;
static char *Port=NULL;
static char Txt[4][40];
static BAR Bar[4][40];
static int nSegment=2;
static SEGMENT Segment[128] = {{ len1:0, len2:0, type:255, used:0, ascii:32 },
{ len1:255, len2:255, type:255, used:0, ascii:255 }};
static unsigned char Buffer[1024];
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_process_bars (void)
{
int row, col;
int i, j;
for (i=2; i<nSegment && Segment[i].used; i++);
for (j=i+1; j<nSegment; j++) {
if (Segment[j].used)
Segment[i++]=Segment[j];
}
nSegment=i;
for (row=0; row<Lcd.rows; row++) {
for (col=0; col<Lcd.cols; col++) {
if (Bar[row][col].type==0) continue;
for (i=0; i<nSegment; i++) {
if (Segment[i].type & Bar[row][col].type &&
Segment[i].len1== Bar[row][col].len1 &&
Segment[i].len2== Bar[row][col].len2) break;
}
if (i==nSegment) {
nSegment++;
Segment[i].len1=Bar[row][col].len1;
Segment[i].len2=Bar[row][col].len2;
Segment[i].type=Bar[row][col].type;
Segment[i].used=0;
Segment[i].ascii=-1;
}
Bar[row][col].segment=i;
}
}
}
static int USBLCD_segment_diff (int i, int j)
{
int RES;
int i1, i2, j1, j2;
if (i==j) return 65535;
if (!(Segment[i].type & Segment[j].type)) return 65535;
if (Segment[i].len1==0 && Segment[j].len1!=0) return 65535;
if (Segment[i].len2==0 && Segment[j].len2!=0) return 65535;
RES=Segment[i].type & BAR_H ? XRES:YRES;
if (Segment[i].len1>=RES && Segment[j].len1<RES) return 65535;
if (Segment[i].len2>=RES && Segment[j].len2<RES) return 65535;
if (Segment[i].len1==Segment[i].len2 && Segment[j].len1!=Segment[j].len2) return 65535;
i1=Segment[i].len1; if (i1>RES) i1=RES;
i2=Segment[i].len2; if (i2>RES) i2=RES;
j1=Segment[j].len1; if (j1>RES) i1=RES;
j2=Segment[j].len2; if (j2>RES) i2=RES;
return (i1-i2)*(i1-i2)+(j1-j2)*(j1-j2);
}
static void USBLCD_compact_bars (void)
{
int i, j, r, c, min;
int pack_i, pack_j;
int pass1=1;
int deviation[nSegment][nSegment];
if (nSegment>CHARS+2) {
for (i=2; i<nSegment; i++) {
for (j=0; j<nSegment; j++) {
deviation[i][j]=USBLCD_segment_diff(i,j);
}
}
while (nSegment>CHARS+2) {
min=65535;
pack_i=-1;
pack_j=-1;
for (i=2; i<nSegment; i++) {
if (pass1 && Segment[i].used) continue;
for (j=0; j<nSegment; j++) {
if (deviation[i][j]<min) {
min=deviation[i][j];
pack_i=i;
pack_j=j;
}
}
}
if (pack_i==-1) {
if (pass1) {
pass1=0;
continue;
} else {
error ("USBLCD: unable to compact bar characters");
nSegment=CHARS;
break;
}
}
nSegment--;
Segment[pack_i]=Segment[nSegment];
for (i=0; i<nSegment; i++) {
deviation[pack_i][i]=deviation[nSegment][i];
deviation[i][pack_i]=deviation[i][nSegment];
}
for (r=0; r<Lcd.rows; r++) {
for (c=0; c<Lcd.cols; c++) {
if (Bar[r][c].segment==pack_i)
Bar[r][c].segment=pack_j;
if (Bar[r][c].segment==nSegment)
Bar[r][c].segment=pack_i;
}
}
}
}
}
static void USBLCD_define_chars (void)
{
int c, i, j;
char buffer[8];
for (i=2; i<nSegment; i++) {
if (Segment[i].used) continue;
if (Segment[i].ascii!=-1) continue;
for (c=0; c<CHARS; c++) {
for (j=2; j<nSegment; j++) {
if (Segment[j].ascii==c) break;
}
if (j==nSegment) break;
}
Segment[i].ascii=c;
switch (Segment[i].type) {
case BAR_L:
for (j=0; j<4; j++) {
char Pixel[] = { 0, 1, 3, 7, 15, 31 };
buffer[j]=Pixel[Segment[i].len1];
buffer[j+4]=Pixel[Segment[i].len2];
}
break;
case BAR_R:
for (j=0; j<4; j++) {
char Pixel[] = { 0, 16, 24, 28, 30, 31 };
buffer[j]=Pixel[Segment[i].len1];
buffer[j+4]=Pixel[Segment[i].len2];
}
break;
case BAR_U:
for (j=0; j<Segment[i].len1; j++) {
buffer[7-j]=31;
}
for (; j<YRES; j++) {
buffer[7-j]=0;
}
break;
case BAR_D:
for (j=0; j<Segment[i].len1; j++) {
buffer[j]=31;
}
for (; j<YRES; j++) {
buffer[j]=0;
}
break;
}
USBLCD_command (0x40|8*c);
USBLCD_write (buffer, 8);
}
}
int USBLCD_clear (void)
{
int row, col;
for (row=0; row<Lcd.rows; row++) {
for (col=0; col<Lcd.cols; col++) {
Txt[row][col]='\t';
Bar[row][col].len1=-1;
Bar[row][col].len2=-1;
Bar[row][col].type=0;
Bar[row][col].segment=-1;
}
}
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("Port"))==NULL || *port=='\0') {
error ("USBLCD: 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);
}
debug ("using device %s ", Port);
s=cfg_get("Size");
if (s==NULL || *s=='\0') {
error ("USBLCD: no 'Size' entry in %s", cfg_file());
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;
if (USBLCD_open()!=0)
return -1;
USBLCD_clear();
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=&Txt[row][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)
{
int rev=0;
if (len1<1) len1=1;
else if (len1>max) len1=max;
if (len2<1) len2=1;
else if (len2>max) len2=max;
switch (type) {
case BAR_L:
len1=max-len1;
len2=max-len2;
rev=1;
case BAR_R:
while (max>0 && col<=Lcd.cols) {
Bar[row][col].type=type;
Bar[row][col].segment=-1;
if (len1>=XRES) {
Bar[row][col].len1=rev?0:XRES;
len1-=XRES;
} else {
Bar[row][col].len1=rev?XRES-len1:len1;
len1=0;
}
if (len2>=XRES) {
Bar[row][col].len2=rev?0:XRES;
len2-=XRES;
} else {
Bar[row][col].len2=rev?XRES-len2:len2;
len2=0;
}
max-=XRES;
col++;
}
break;
case BAR_U:
len1=max-len1;
len2=max-len2;
rev=1;
case BAR_D:
while (max>0 && row<=Lcd.rows) {
Bar[row][col].type=type;
Bar[row][col].segment=-1;
if (len1>=YRES) {
Bar[row][col].len1=rev?0:YRES;
len1-=YRES;
} else {
Bar[row][col].len1=rev?YRES-len1:len1;
len1=0;
}
if (len2>=YRES) {
Bar[row][col].len2=rev?0:YRES;
len2-=YRES;
} else {
Bar[row][col].len2=rev?YRES-len2:len2;
len2=0;
}
max-=YRES;
row++;
}
break;
}
return 0;
}
int USBLCD_flush (void)
{
char buffer[256];
char *p;
int s, row, col;
USBLCD_process_bars();
USBLCD_compact_bars();
USBLCD_define_chars();
for (s=0; s<nSegment; s++) {
Segment[s].used=0;
}
for (row=0; row<Lcd.rows; row++) {
for (col=0; col<Lcd.cols; col++) {
s=Bar[row][col].segment;
if (s!=-1) {
Segment[s].used=1;
Txt[row][col]=Segment[s].ascii;
}
}
for (col=0; col<Lcd.cols; col++) {
if (Txt[row][col]=='\t') continue;
USBLCD_goto (row, col);
for (p=buffer; col<Lcd.cols; col++, p++) {
if (Txt[row][col]=='\t') break;
*p=Txt[row][col];
}
USBLCD_write (buffer, p-buffer);
}
}
USBLCD_send();
return 0;
}
int USBLCD_quit (void)
{
USBLCD_send();
debug ("closing port %s", Port);
close(usblcd_file);
return 0;
}
LCD USBLCD[] = {
{ "USBLCD",0,0,XRES,YRES,BARS,0,USBLCD_init,USBLCD_clear,USBLCD_put,USBLCD_bar,NULL,USBLCD_flush,USBLCD_quit },
{ NULL }
};
Reference in New Issue View Git Blame Copy Permalink