clrscr_u.src

C51源码.其内文件包含spi

; CLRSCR_U.SRC generated from: CLRSCR_U.C

$NOMOD51

NAME    CLRSCR_U

;DPP     DATA    084H
P1      DATA    090H
DPL     DATA    082H
DPH     DATA    083H
B       DATA    0F0H
?PR?clrlcdram_U?CLRSCR SEGMENT CODE
?DT?clrlcdram_U?CLRSCR SEGMENT DATA
EXTRN   IDATA (a_bcolor)
PUBLIC  Clrlcdram_U

        RSEG  ?DT?clrlcdram_U?CLRSCR
?clrlcdram_U?BYTE:
p?02:                   DS  2

        RSEG  ?PR?clrlcdram_U?CLRSCR
        USING   0
Clrlcdram_U:
clrscr:
        push   6
        push   7
        push   dpl
        push   dph
        push   0
        mov    r6,  #20
        mov    r7,  #163
	
        ;
	SETB   P1.0

	CLR    P1.4
	;mov    dpp, #0f7h
		
        mov    dptr,#0fffh
        mov    r0,#a_bcolor
        mov    a,@r0
        mov    b,a
        swap   a
        orl    a,b
clrloop:
	movx   @dptr,a
        inc    dph
        djnz   r6,clrloop
        mov    dph,#0fh
        inc    dpl
        mov    r6,#20
        djnz   r7, clrloop

      ;  mov    dpp,#0efh
      SETB   P1.4

      CLR    P1.0
        pop    0
        pop    dph
        pop    dpl
        pop    7
        pop    6
        RET

        END