[assemble code start]    X EQU 30H
Y EQU 31H
EX EQU 32H
EY EQU 33H
XBUFFER EQU 34H
YBUFFER EQU 35H
DBUF EQU 36H    MOV X,#01
MOV Y,#01
MOV EX,#20
MOV EY,#80
MOV DBUF,#FFH
CALL DDRAMWR_BW_BLOCK
.
.
.
;--------------------------------------------
DDRAMWR_BW_BLOCK:
PUSH 1
PUSH 2
PUSH 3
PUSH 4    CLR C
MOV A,EX
SUBB A,X
INC A
MOV XBUFFER,A
CLR C
MOV A,EY
SUBB A,Y
INC A
MOV YBUFFER,A    MOV A,Y
DEC A
MOV B,#20
MUL AB    CLR C    ADD A,X
CJNE A,#00H,BW62_BLK
DEC B    BW62_BLK: DEC A
MOV R1,A
MOV A,B
ADDC A,#0
MOV R2,A
CLR C    BW22_BLK: MOV R3,XBUFFER
BW12_BLK:
MOV A,DBUF
CPL A
CALL DATA_WR    BW52_BLK: INC R1    MOV A,R1
DEC A
CJNE A,#255,BW32_BLK    MOV R1,#0
INC R2
CLR C
BW32_BLK: DJNZ R3,BW12_BLK    CLR C
MOV A,#20
SUBB A,XBUFFER
ADD A,R1
MOV R1,A
MOV A,R2
ADDC A,#0
MOV R2,A
DJNZ YBUFFER,BW22_BLK    POP 4
POP 3
POP 2
POP 1    RET    ;--------------------------------------    DATA_WR: ;Write data to MEM thru 1352
PUSH DPL
PUSH DPH
; CLR C
MOV DPL,R1
MOV DPH,R2
CLR P3.4 ;MEMCS#=0,
CLR P3.1
CLR P3.0
CLR P1.0 ;Ereset=0;
MOVX @DPTR,A
SETB P3.4 ;MEMCS#=1
POP DPH
POP DPL
RET
;--------------------------------------------
[assemble code end]    [c51 code start]    unsigned char xdata * data Addr;
Show_bar(0x01,0x01,0x20,0x80,0xff);    //==================
void Show_bar(unsigned char x, unsigned char y,unsigned char ex, unsigned char ey,unsigned char DBUF)
{
unsigned char c,x1,y1,YHL,YH,YL,xbuffer,ybuffer;
CY=0;
c=CY;
xbuffer=(ex-c-x) 1;
ybuffer=(ey-c-y) 1;    YHL=(y-1)*0x14;
YH=(YHL&0xff00)>>8;
YL=(YHL&0x00ff);    c=0;
YL=YL x;
if(YL=!0)
{
x1=YL--;
y1=YL c 0;
}
else
{
YH--;
x1=YL--;
y1=YL c 0;
}    loop1:
if(ybuffer!=0)
{
loop:
if(xbuffer!=0)
{
DBUF=~DBUF;    P3_4=0;
P3_1=0;
P3_0=0;
P1_0=0;
*Addr=DBUF;
P3_4=1;    x1  ;
x1--;
if(x1!=255)
{
xbuffer--;
}
else
{
x1=0;
y1  ;
c=0;
}
goto loop;
}
else
{
c=0;
x1=0x14-xbuffer x1;
y1=y1 c 0;
}
ybuffer--;
goto loop1;
}
}
//=========================
[c51 code end]