原创 用C8051F330控制LCD显示（二）

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ERD              BIT  P1.0                             ;//E/#RD=0,READ STATE

RW         BIT  P1.1                                    ;//R/#W=0,WRITE DATA     

DC         BIT  P1.2                                           ;//D/#C,DATAORCOMMANDSELECT,=1,DATA,=0,COMMAND

RES        BIT  P1.3        `                                  ;//#RESET,=0,RESET

CS          BIT  P1.4                                           ;//#CS,CHIP SELECT INPUT,=0,CHIP SELECT

写数据：

WrData:

              MOV             P0,A

              SETB      DC

              CLR        RW

              CLR        CS

              SETB      ERD

              NOP

              NOP

              CLR        ERD

              SETB      CS

              RET

写命令：

WrCmd:

              MOV             P0,A

              CLR        DC                                            ;//CONTROL

              CLR        RW                                            ;//WRITE

              CLR        CS

              SETB      ERD             

              NOP

              NOP

              CLR        ERD

              SETB      CS

              RET

;//=========================================================

DELAY:    MOV   TIME0,#10   

DELAY2: 

                            MOV             PCA0MD,#00H             ;//WDT

         DJNZ  TIME0,DELAY2 

         DJNZ  TIME1,DELAY

         RET

;//====================================================================

DELAY500:

         MOV   TIME1,#250

         LCALL DELAY

         MOV   TIME1,#250

         LCALL DELAY

         RET

;//====================================================================

DELAY1S:

        MOV   TIME1,#100   

         LCALL DELAY

         MOV   TIME1,#100

         LCALL DELAY

         MOV   TIME1,#100

         LCALL DELAY

         MOV   TIME1,#100

         LCALL DELAY

         RET

;//====================================================================

PortInit:

              MOV             XBR1,#40H                                ;//CROSS SW ENABLE

              MOV             P0MDOUT,#0ffH                        ;//

              MOV             P1MDOUT,#0ffH                        ;//

              ret