基于pic16f877a的課程設計-資料下載頁
2025-06-19 12:37本頁面
【正文】 **C1602 。調(diào)用延時,剛上電LCD復位不一定有PIC快(196MS) MOVLW 01H 。清屏命令,數(shù)據(jù)指針清零，所有顯示清零 CALL ML 。調(diào)用寫命令程序 MOVLW 38H 。顯示開、光標顯示、光標不顯示 CALL ML 。當讀或?qū)懸粋€字符后，地址指針加一，且光標加一 MOVLW 0EH 。當寫一個字符后，整屏顯示不移動 CALL ML 。設置數(shù)據(jù)地址指針 MOVLW 06H 。8位2行5x7點陣 CALL ML MOVLW 01H CALL ML MOVLW 0CH CALL ML RETURNCHANGE1 MOVLW 0EH CALL MLCHANGE11 CLRF AN8 MOVLW WLUI MOVWF WEI CHANGE BTFSC PORTB,1 GOTO B2 CALL B1_JPSM INCF AN8 MOVF AN8,W XORLW 09H BTFSC 03H,2 GOTO CHANGE11 GOTO CHANGE B2 BTFSC PORTB,2 GOTO PB0 CALL B2_JPSM B20 MOVF AN8,W XORLW 01H BTFSC 03H,2 CALL A6 B21 MOVF AN8,W XORLW 02H BTFSC 03H,2 CALL A5 B22 MOVF AN8,W XORLW 04H BTFSC 03H,2 CALL A4 B23 MOVF AN8,W XORLW 05H BTFSC 03H,2 CALL A3 B24 MOVF AN8,W XORLW 07H BTFSC 03H,2 CALL A2 B25 MOVF AN8,W XORLW 08H BTFSC 03H,2 CALL A1 GOTO CHANGE B1_JPSM MOVLW 0FH CALL ML SS1 BTFSC PORTB,1 GOTO SS1 CALL DELAY10MS BTFSC PORTB,1 RETURN SS2 BTFSS PORTB,1 GOTO SS2 CALL DELAY10MS BTFSS PORTB,1 GOTO SS2 MOVF WEI,W CALL ML INCF WEI RETURN B2_JPSM NOP SS3 BTFSC PORTB,2 GOTO SS3 CALL DELAY10MS BTFSC PORTB,2 GOTO CHANGE SS4 BTFSS PORTB,2 GOTO SS4 CALL DELAY10MS BTFSS PORTB,2 GOTO SS4 RETURN PB0 BTFSC PORTB,0 GOTO CHANGE CALL B0_JPSM RETURN B0_JPSM BTFSC PORTB,0 GOTO CHANGE CALL DELAY10MS BTFSC PORTB,0 GOTO CHANGE PB0_1 BTFSS PORTB,0 GOTO PB0_1 CALL DELAY10MS BTFSS PORTB,0 GOTO PB0_1 RETURN。*******************送數(shù)據(jù)到LCD子程序************* SJ MOVWF PORTD BSF RS BCF RW BCF E CALL DELAY1 BSF E RETURN。*******************寫命令程序********************ML MOVWF PORTD BCF RS 。寫入控制命令的子程序 BCF RW BCF E CALL DELAY1 。高脈沖使能 BSF E RETURNDELAY1 BCF INTCON,T0IF MOVLW 0FdH MOVWF TMR0LXX BTFSS INTCON,T0IF GOTO LXX BCF INTCON,T0IF RETURNDELAY10MS BCF INTCON,T0IF MOVLW 0D3H MOVWF TMR0KXX BTFSS INTCON,T0IF GOTO KXX RETURNE
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