-/* $Id: USBLCD.c,v 1.4 2002/08/19 04:41:20 reinelt Exp $
+/* $Id: USBLCD.c,v 1.5 2002/08/19 07:36:29 reinelt Exp $
*
* Driver for USBLCD ( see http://www.usblcd.de )
* This Driver is based on HD44780.c
*
*
* $Log: USBLCD.c,v $
+ * 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
*
#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);
+ // 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));
+ // 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;
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) {
+ 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) {
+ if (sscanf(buf,"USBLCD Driver Version %d.%d",&major,&minor)!=2) {
error("USBLCD: could not read Driver Version!");
return -4;
- };
-
- if(major!=1) {
+ }
+ 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) {
+ 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) {
+ if (sscanf(buf,"%d.%d",&major,&minor)!=2) {
error("USBLCD: could not read Hardware Version!");
return -4;
};
-
- if(major!=1) {
+ 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
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)
+static void USBLCD_define_char (int ascii, char *buffer)
{
- 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);
+ USBLCD_command (0x40|8*ascii);
+ USBLCD_write (buffer, 8);
}
-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)
{
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;
}
}
+
+ bar_clear();
+
USBLCD_command (0x01); // clear display
+
return 0;
}
+
int USBLCD_init (LCD *Self)
{
int rows=-1, cols=-1 ;
if (USBLCD_open()!=0)
return -1;
+ bar_init(rows, cols, XRES, YRES, CHARS);
+ bar_add_segment( 0, 0,255, 32); // ASCII 32 = blank
+ bar_add_segment(255,255,255,255); // ASCII 255 = block
+
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];
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;
+ return bar_draw (type, row, col, max, len1, len2);
}
+
int USBLCD_flush (void)
{
char buffer[256];
char *p;
- int s, row, col;
-
- USBLCD_process_bars();
- USBLCD_compact_bars();
- USBLCD_define_chars();
+ int c, row, col;
- for (s=0; s<nSegment; s++) {
- Segment[s].used=0;
- }
+ bar_process(&USBLCD_define_char);
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;
+ c=bar_peek(row, col);
+ if (c!=-1) {
+ Txt[row][col]=(char)c;
}
}
for (col=0; col<Lcd.cols; col++) {
return 0;
}
+
int USBLCD_quit (void)
{
USBLCD_send();
return 0;
}
+
LCD USBLCD[] = {
- { "USBLCD",0,0,XRES,YRES,BARS,0,USBLCD_init,USBLCD_clear,USBLCD_put,USBLCD_bar,NULL,USBLCD_flush,USBLCD_quit },
+ { name: "USBLCD",
+ rows: 0,
+ cols: 0,
+ xres: XRES,
+ yres: YRES,
+ bars: BAR_L | BAR_R | BAR_U | BAR_D | BAR_H2,
+ gpos: 0,
+ init: USBLCD_init,
+ clear: USBLCD_clear,
+ put: USBLCD_put,
+ bar: USBLCD_bar,
+ gpo: NULL,
+ flush: USBLCD_flush,
+ quit: USBLCD_quit
+ },
{ NULL }
};
-/* $Id: bar.c,v 1.1 2002/08/19 04:41:20 reinelt Exp $
+/* $Id: bar.c,v 1.2 2002/08/19 07:36:29 reinelt Exp $
*
* generic bar handling
*
*
*
* $Log: bar.c,v $
+ * Revision 1.2 2002/08/19 07:36:29 reinelt
+ *
+ * finished bar.c, USBLCD is the first driver that uses the generic bar functions
+ *
* Revision 1.1 2002/08/19 04:41:20 reinelt
* introduced bar.c, moved bar stuff from display.h to bar.h
*
/*
* exported functions:
*
+ * int bar_init (int rows, int cols, int xres, int yres, int chars)
+ *
+ * void bar_clear(void)
+ *
+ * void bar_add_segment(int len1, int len2, int type, int ascii)
+ *
+ * int bar_draw (int type, int row, int col, int max, int len1, int len2)
+ *
+ * int bar_process (void)
+ *
+ * int bar_peek (int row, int col)
*
*/
+#include <stdlib.h>
+
#include "bar.h"
#include "debug.h"
+
+static int ROWS=0;
+static int COLS=0;
+static int XRES=0;
+static int YRES=0;
+static int CHARS=0;
+
+static int nSegment=0;
+static int fSegment=0;
+static SEGMENT Segment[128];
+
+static BAR *Bar=NULL;
+
+
+int bar_init (int rows, int cols, int xres, int yres, int chars)
+{
+ if (rows<1 || cols<1)
+ return -1;
+
+ ROWS=rows;
+ COLS=cols;
+ XRES=xres;
+ YRES=yres;
+ CHARS=chars;
+
+ if (Bar) {
+ free (Bar);
+ }
+
+ if ((Bar=malloc (ROWS*COLS*sizeof(BAR)))==NULL) {
+ return -1;
+ }
+
+ bar_clear();
+
+ nSegment=0;
+ fSegment=0;
+
+ return 0;
+}
+
+
+void bar_clear(void)
+{
+ int n;
+
+ for (n=0; n<ROWS*COLS; n++) {
+ Bar[n].len1=-1;
+ Bar[n].len2=-1;
+ Bar[n].type=0;
+ Bar[n].segment=-1;
+ }
+
+}
+
+
+void bar_add_segment(int len1, int len2, int type, int ascii)
+{
+ Segment[fSegment].len1=len1;
+ Segment[fSegment].len2=len2;
+ Segment[fSegment].type=type;
+ Segment[fSegment].used=0;
+ Segment[fSegment].ascii=ascii;
+
+ fSegment++;
+ nSegment=fSegment;
+}
+
+
+int bar_draw (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<COLS) {
+ Bar[row*COLS+col].type=type;
+ Bar[row*COLS+col].segment=-1;
+ if (len1>=XRES) {
+ Bar[row*COLS+col].len1=rev?0:XRES;
+ len1-=XRES;
+ } else {
+ Bar[row*COLS+col].len1=rev?XRES-len1:len1;
+ len1=0;
+ }
+ if (len2>=XRES) {
+ Bar[row*COLS+col].len2=rev?0:XRES;
+ len2-=XRES;
+ } else {
+ Bar[row*COLS+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<ROWS) {
+ Bar[row*COLS+col].type=type;
+ Bar[row*COLS+col].segment=-1;
+ if (len1>=YRES) {
+ Bar[row*COLS+col].len1=rev?0:YRES;
+ len1-=YRES;
+ } else {
+ Bar[row*COLS+col].len1=rev?YRES-len1:len1;
+ len1=0;
+ }
+ if (len2>=YRES) {
+ Bar[row*COLS+col].len2=rev?0:YRES;
+ len2-=YRES;
+ } else {
+ Bar[row*COLS+col].len2=rev?YRES-len2:len2;
+ len2=0;
+ }
+ max-=YRES;
+ row++;
+ }
+ break;
+
+ }
+ return 0;
+}
+
+
+static void create_segments (void)
+{
+ int i, j, n;
+
+ /* find first unused segment */
+ for (i=fSegment; i<nSegment && Segment[i].used; i++);
+
+ /* pack unused segments */
+ for (j=i+1; j<nSegment; j++) {
+ if (Segment[j].used)
+ Segment[i++]=Segment[j];
+ }
+ nSegment=i;
+
+ /* create needed segments */
+ for (n=0; n<ROWS*COLS; n++) {
+ if (Bar[n].type==0) continue;
+ for (i=0; i<nSegment; i++) {
+ if (Segment[i].type & Bar[n].type &&
+ Segment[i].len1== Bar[n].len1 &&
+ Segment[i].len2== Bar[n].len2) break;
+ }
+ if (i==nSegment) {
+ nSegment++;
+ Segment[i].len1=Bar[n].len1;
+ Segment[i].len2=Bar[n].len2;
+ Segment[i].type=Bar[n].type;
+ Segment[i].used=0;
+ Segment[i].ascii=-1;
+ }
+ Bar[n].segment=i;
+ }
+}
+
+
+static int segment_deviation (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 pack_segments (void)
+{
+ int i, j, n, min;
+ int pack_i, pack_j;
+ int pass1=1;
+ int deviation[nSegment][nSegment];
+
+ if (nSegment<=fSegment+CHARS) {
+ return;
+ }
+
+ for (i=0; i<nSegment-1; i++) {
+ for (j=i+1; j<nSegment; j++) {
+ int d=segment_deviation(i,j);
+ deviation[i][j]=d;
+ deviation[j][i]=d;
+ }
+ }
+
+ while (nSegment>fSegment+CHARS) {
+ min=65535;
+ pack_i=-1;
+ pack_j=-1;
+ for (i=fSegment; 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 ("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 (n=0; n<ROWS*COLS; n++) {
+ if (Bar[n].segment==pack_i) Bar[n].segment=pack_j;
+ if (Bar[n].segment==nSegment) Bar[n].segment=pack_i;
+ }
+ }
+}
+
+
+static void define_chars (int(*defchar)(int ascii, char *matrix))
+{
+ int c, i, j;
+ char buffer[8];
+
+ for (i=fSegment; i<nSegment; i++) {
+ if (Segment[i].used) continue;
+ if (Segment[i].ascii!=-1) continue;
+ for (c=0; c<CHARS; c++) {
+ for (j=fSegment; 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++) {
+#if 0
+ char Pixel[] = { 0, 1, 3, 7, 15, 31 };
+ buffer[j ]=Pixel[Segment[i].len1];
+ buffer[j+4]=Pixel[Segment[i].len2];
+#else
+ buffer[j ]=(1<<Segment[i].len1)-1;
+ buffer[j+4]=(1<<Segment[i].len2)-1;
+#endif
+ }
+ break;
+ case BAR_R:
+ for (j=0; j<4; j++) {
+#if 0
+ char Pixel[] = { 0, 16, 24, 28, 30, 31 };
+ buffer[j ]=Pixel[Segment[i].len1];
+ buffer[j+4]=Pixel[Segment[i].len2];
+#else
+ buffer[j ]=255<<(XRES-Segment[i].len1);
+ buffer[j+4]=255<<(XRES-Segment[i].len2);
+#endif
+ }
+ break;
+ case BAR_U:
+ for (j=0; j<Segment[i].len1; j++) {
+ buffer[7-j]=(1<<XRES)-1;
+ }
+ for (; j<YRES; j++) {
+ buffer[7-j]=0;
+ }
+ break;
+ case BAR_D:
+ for (j=0; j<Segment[i].len1; j++) {
+ buffer[j]=(1<<XRES)-1;
+ }
+ for (; j<YRES; j++) {
+ buffer[j]=0;
+ }
+ break;
+ }
+ defchar(c, buffer);
+ }
+}
+
+
+int bar_process (int(*defchar)(int ascii, char *matrix))
+{
+ int n, s;
+
+ create_segments();
+ pack_segments();
+ define_chars(defchar);
+
+ for (s=0; s<nSegment; s++) {
+ Segment[s].used=0;
+ }
+
+ for (n=0; n<ROWS*COLS; n++) {
+ s=Bar[n].segment;
+ if (s!=-1) {
+ Segment[s].used=1;
+ }
+ }
+
+ return 0;
+}
+
+
+int bar_peek (int row, int col)
+{
+ int s;
+
+ s=Bar[row*COLS+col].segment;
+ if (s==-1) {
+ return -1;
+ } else {
+ return Segment[s].ascii;
+ }
+}
projects / lcd4linux.git / commitdiff