A,,@A+DPTR
MOV 24H,A LCALL CHU LIANG: MOV A,26H LCALL CHU CHU: MOV R2,23H LOOP: MOV P0,24H SETB P0.4 LCALL D-10MS DJNZ R2,LOOP
CLR P0.4 LCALL D-10MS LCALL LOOP DL10MS: MOV R6,#0C8H ;循环200次，200*50uS=10ms
20
DL1: MOV R7,#19H ;25*2个机器周期
DL2: DJNZ R7,DL2 DJNZ R6,DL1 RET
TAB1: 41H,33H,27H.,1FH TAB2:
00H,01H,02H,03H,04H.05H,06H,07H,
08H,09H,0AH,0BH,0CH,0DH
,0EH,0FH
END