Pic16f877 中断控制电路-

程序范例：
1.外部中断LED 方向控制
2.计时中断LED 方向控制
3.计时加外部中断LED 方向控制
4.计时中断时钟 ─ 分：秒(使用七段显示器)
5.计时中断 ─ 改写8led22.asm 程序

外部中断LED 方向控制

范例一：int1.*
LIST P=16F877,R=DEC
#INCLUDE <P16F877.INC>
;
CBLOCK 0X20
R0,USRFLAG
ENDC
;
ORG 0
NOP
GOTO MAIN
ORG 4
BTFSS USRFLAG,0
GOTO INT1
BCF USRFLAG,0
GOTO INT2
INT1: BSF USRFLAG,0
INT2: BTFSS PORTB,0
GOTO INT2
BCF INTCON,INTF
RETFIE
;
MAIN:
BANKSEL TRISD
MOVLW 0
MOVWF TRISD
BANKSEL PORTD
BSF INTCON,GIE
BSF INTCON,INTE
MOVLW B'11111110'
MOVWF R0
BCF USRFLAG,0
MLOOP: MOVF R0,0
MOVWF PORTD
CALL DELAY250
BTFSC USRFLAG,0
GOTO RIGHT
LEFT: CLRC
BTFSC R0,7
SETC
RLF R0,1

GOTO MLOOP
RIGHT: CLRC
BTFSC R0,0
SETC
RRF R0,1
GOTO MLOOP
;
#INCLUDE <DELAY250.INC>
;
END

计时中断LED 方向控制

范例一：int2.*
LIST P=16F877,R=DEC
#INCLUDE <P16F877.INC>
;
CBLOCK 0X20
R0,WBAK,SBAK,USRFLAG
DCONT
ENDC
;
TBUF EQU 256-250
;
ORG 0
NOP
GOTO MAIN
ORG 4
MOVWF WBAK
SWAPF STATUS,0
MOVWF SBAK
MOVLW TBUF
ADDWF TMR0
DECF DCONT
MOVF DCONT,1
SKPZ
GOTO T2INT
MOVLW .200
MOVWF DCONT
BTFSS USRFLAG,0
GOTO T1INT
BCF USRFLAG,0
GOTO T2INT
T1INT: BSF USRFLAG,0
T2INT: BCF INTCON,T0IF
SWAPF SBAK,0
MOVWF STATUS
SWAPF WBAK,1
SWAPF WBAK,0
RETFIE
;
MAIN:
BANKSEL OPTION_REG

MOVLW B'00000111'
MOVWF OPTION_REG
MOVLW 0
MOVWF TRISD
BANKSEL TMR0
MOVLW TBUF
MOVWF TMR0
BSF INTCON,GIE
BSF INTCON,T0IE
MOVLW .200
MOVWF DCONT
MOVLW B'11111110'
MOVWF R0
BCF USRFLAG,0
MLOOP: MOVF R0,0
MOVWF PORTD
CALL DELAY250
BTFSC USRFLAG,0
GOTO RIGHT
LEFT: CLRC
BTFSC R0,7
SETC
RLF R0,1
GOTO MLOOP
RIGHT: CLRC
BTFSC R0,0
SETC
RRF R0,1
GOTO MLOOP
;
#INCLUDE <DELAY250.INC>
;
END

计时加外部中断LED方向控制
范例一：int3.* LIST P=16F877,R=DEC #INCLUDE <P16F877.INC> ; CBLOCK 0X20 R0,WBAK,SBAK,USRFLAG DCONT ENDC ; TBUF EQU 256-250 ; ORG 0 NOP GOTO MAIN ORG 4 BTFSS INTCON,T0IF GOTO INT0 BCF INTCON,INTE MOVWF WBAK SWAPF STATUS,0 MOVWF SBAK MOVLW TBUF ADDWF TMR0 DECF DCONT MOVF DCONT,1 SKPZ GOTO T2INT MOVLW .200 MOVWF DCONT BTFSS USRFLAG,0 GOTO T1INT BCF USRFLAG,0 GOTO T2INT T1INT: BSF USRFLAG,0 T2INT: BCF INTCON,T0IF BSF INTCON,INTE SWAPF SBAK,0 MOVWF STATUS SWAPF WBAK,1 SWAPF WBAK,0 GOTO RIGHT LEFT: CLRC BTFSC R0,7 SETC RLF R0,1 GOTO MLOOP RIGHT: CLRC BTFSC R0,0 SETC RRF R0,1 GOTO MLOOP ; #INCLUDE <DELAY250.INC> ; END	RETFIE ; INT0: BCF INTCON,T0IE BTFSS USRFLAG,0 GOTO INT01 BCF USRFLAG,0 GOTO INT02 INT01: BSF USRFLAG,0 INT02: BTFSS PORTB,0 GOTO INT02 BCF INTCON,INTF MOVLW TBUF MOVWF TMR0 MOVLW .200 MOVWF DCONT BSF INTCON,T0IE RETFIE ; MAIN: BANKSEL OPTION_REG MOVLW B'00000111' MOVWF OPTION_REG MOVLW 0 MOVWF TRISD BANKSEL TMR0 MOVLW TBUF MOVWF TMR0 BSF INTCON,GIE BSF INTCON,T0IE BSF INTCON,INTE MOVLW .200 MOVWF DCONT MOVLW B'11111110' MOVWF R0 BCF USRFLAG,0 MLOOP: MOVF R0,0 MOVWF PORTD CALL DELAY250 BTFSC USRFLAG,0

计时中断时钟 ─ 分：秒(使用七段显示器)
范例一：intclock.* LIST P=16F877,R=DEC #INCLUDE <P16F877.INC> ; CBLOCK 0X20 DB0,DB1,WBAK,SBAK,DCONT C1,C2,TIMS,TIMM ENDC ; TBUF EQU 256-250 ; ORG 0 NOP GOTO MAIN ORG 4 MOVWF WBAK SWAPF STATUS,0 MOVWF SBAK MOVLW TBUF ADDWF TMR0 DECF DCONT MOVF DCONT,1 SKPZ GOTO T2INT MOVLW .125 MOVWF DCONT CALL TEST1 CALL TEST2 T2INT: BCF INTCON,T0IF SWAPF SBAK,0 MOVWF STATUS SWAPF WBAK,1 SWAPF WBAK,0 RETFIE ; MAIN: BANKSEL OPTION_REG MOVLW B'00000110' MOVWF OPTION_REG MOVLW 0 ; SWAPF TIMM,0 CALL TABLE MOVWF PORTD MOVLW H'F7' MOVWF PORTB CALL DELAY25 BSF PORTB,3 GOTO MLOOP ; TABLE: ANDLW H'0F' ADDWF PCL T1: RETLW H'C0' ;'0' RETLW H'F9' ;'1' RETLW H'A4' ;'2' RETLW H'B0' ;'3' RETLW H'99' ;'4' RETLW H'92' ;'5' RETLW H'82' ;'6' RETLW H'F8' ;'7' RETLW H'80' ;'8' RETLW H'90' ;'9' RETLW H'88' ;'A' RETLW H'83' ;'B' RETLW H'C6' ;'C' RETLW H'A1' ;'D' RETLW H'86' ;'E' RETLW H'8E' ;'F' ; TEST1: INCF DB0 MOVF DB0,0 SUBLW .60 SKPZ RETURN MOVLW 0 MOVWF DB0 INCF DB1 MOVF DB1,0 SUBLW .60 SKPZ RETURN MOVLW	MOVWF TRISD MOVWF TRISB BANKSEL TMR0 MOVLW TBUF MOVWF TMR0 BSF INTCON,GIE BSF INTCON,T0IE MOVLW .125 MOVWF DCONT MOVLW H'FF' MOVWF PORTB MOVLW 0 MOVWF DB0 MOVWF DB1 MOVWF TIMS MOVWF TIMM MLOOP: MOVF TIMS,0 CALL TABLE MOVWF PORTD MOVLW H'FE' MOVWF PORTB CALL DELAY25 BSF PORTB,0 ; SWAPF TIMS,0 CALL TABLE MOVWF PORTD MOVLW H'FD' MOVWF PORTB CALL DELAY25 BSF PORTB,1 ; MOVF TIMM,0 CALL TABLE MOVWF PORTD MOVLW H'FB' MOVWF PORTB CALL DELAY25 BSF PORTB,2 MOVWF DB1 RETURN ; TEST2: CLRF C1 CLRF C2 MOVF DB0,0 MOVWF TIMS MOVF DB1,0 MOVWF TIMM TA: MOVLW .10 SUBWF TIMS,0 SKPC GOTO TB MOVWF TIMS INCF C1 GOTO TA TB: SWAPF C1,0 IORWF TIMS,0 MOVWF TIMS TC: MOVLW .10 SUBWF TIMM,0 SKPC GOTO TD MOVWF TIMM INCF C2 GOTO TC TD: SWAPF C2,0 IORWF TIMM,0 MOVWF TIMM RETURN ; #INCLUDE <DELAY25.INC> ; END

计时中断 ─ 改写8led22.asm 程序
范例一：int4.* LIST P=16F877,R=DEC #INCLUDE <P16F877.INC> ; CBLOCK H'20' WBAK,SBAK,DCONT,PORT_REG ENDC ; ORG 0 NOP GOTO MAIN ORG 4 MOVWF WBAK SWAPF STATUS,0 MOVWF SBAK MOVLW 6 ADDWF TMR0 DECF DCONT MOVF DCONT,1 SKPZ GOTO T2INT MOVLW 125 MOVWF DCONT BTFSC PORT_REG,7 GOTO T1INT MOVLW B'11111110' MOVWF PORT_REG GOTO T2INT T1INT: SETC RLF PORT_REG,1 T2INT: BCF INTCON,T0IF SWAPF SBAK,0 MOVWF STATUS SWAPF WBAK,1 SWAPF WBAK,0 RETFIE ; MAIN: BANKSEL OPTION_REG MOVLW B'00000110'	MOVWF OPTION_REG MOVLW 0 MOVWF TRISD BANKSEL TMR0 MOVLW 6 MOVWF TMR0 BSF INTCON,GIE BSF INTCON,T0IE MOVLW 125 MOVWF DCONT MOVLW B'11111110' MOVWF PORT_REG AGAIN: MOVF PORT_REG,0 MOVWF PORTD GOTO AGAIN END ※ 移位时间设为1 秒钟 ※