程序和电路都没问题就是不显示,晕了[Emot]1[/Emot]程序: DCLK BIT P0.0 DIN BIT P0.1 LOAD BIT P0.2 ORG 0000H LJMP MAIN ORG 0030H MAIN: CLR DIN SETB DCLK SETB DIN SETB LOAD MOV B,#04H MOV A,#01H LCALL WRITE MOV B,#05H MOV A,#80H LCALL WRITE MOV B,#08H:显示0~7 MOV A,#00H LCALL WRITE ....... LJMP MAIN WRITE: CLR LOAD MOV R7,#08H WRITE8:RRC A CLR DCLK MOV DIN,C SETB DCLK DJNZ R7,WRITE8 MOV A,B MOV R7,#04H WRITE4:RRC A CLR DCLK MOV DIN,C SETB DCLK DJNZ R7,WRITE SETB LOAD RET NOP NOP END 数码管一点反应也没有,请各位高手帮忙。用单片机89S52 ,ISP在线下载器
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