Single chip LCD display program-EEWORLD

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The assembly language program of the microcontroller driving the 1602 LCD display. You only need to change the port in the first 3 lines. The data port is P0. The program has passed the test.

      RS EQU P2.0;
      RW EQU P2.1;
      E EQU P2.2;
      ORG 0000H;
      AJMP MAIN;
      ORG 0100H;
MAIN: MOV P0,#01H;
      LCALL XRT;
      MOV P0,#038H;
      LCALL XRT;
      MOV P0,#0CH;
      LCALL XRT;
      MOV P0,#080H;
      LCALL XRT;
      MOV R1,#080H;
      MOV P0,#01010011B;
      LCALL WXS;
      LCALL QJ;
      MOV P0,#01010000B;
      LCALL WXS;
      LCALL QJ;
      MOV P0,#01010011B
      LCALL WXS;
      LCALL QJ;
      MOV P0,#01010111B
      LCALL WXS;
      LCALL QJ;
      MOV P0,#01000100B
      LCALL WXS;
      LCALL QJ;
      MOV P0,#00111000B
      LCALL WXS;
      LCALL QJ;
      MOV P0,#01010101B
      LCALL WXS;
      LCALL QJ;
WXS: SETB RS;
      CLR RW;
      CLR E;
      RET;
QJ: MOV A,R1;
      INC A;
      MOV R1,A;
      MOV P0,A;
      LCALL XRT;
      RET;
XRT: CLR RS;
      CLR RW;
      CLR E;
      LCALL CKMB;
      SETB E;
      RET;
CKMB: MOV P0,#0FFH;
      CLR RS;
      SETB RW;
      CLR E;
      NOP
      SETB E;
      JB P0.7, CKMB;
      RET
      END

Keywords：MCU Reference address：Single chip LCD display program

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