clrc编程什么意思

⑴ 求单片机编程找最大数

程序如下:
MOV
R0,
#21H
;起始地址.
MOV
MAX,#00H
;先用0当做最大值.
MOV
R2,
#20H
;数据长度.
LOOP:
MOV
A,
@R0
;取来一个数据.
CLR
C
SUBB
A,
MAX
;减“最大值”.
JNC
rel1
;不够减就算了.
MOV
A,
@R0
;够减，就把这个数据.
MOV
MAX,A
;当做最大值.
rel1:
INC
R0
;转向下一个.
DJNZ
R2,
LOOP
;循环.
SJMP
$
;结束.
END

⑵ 单片机数码管编程 汇编语言，急

U16INC	MACRO	U16,;;16位无符号型变量加1
LOCALZZ	
	INC	U16+1
	MOV	A,U16+1
	JNZ	ZZ
	MOV	U16+1,#0
	INC	U16
ZZ:
	ENDM
	
U16MOV	MACRO	U16,VAL;;16位无符号型变量赋值
	MOV	U16+1,#LOW(VAL)
	MOV	U16,#HIGH(VAL)	
	ENDM
	
U16DAYV	MACRO	U16,VAL,;;16位无符号型变量判断大小,最后根据Cy判断
	MOV	A,U16+1
	CLR	C
	SUBB	A,#LOW(VAL)
	MOV	A,U16
	SUBB	A,#HIGH(VAL)	
	ENDM

	WX1	EQU	P2.0
	WX2	EQU	P2.1
	WX3	EQU	P2.2
	WX4	EQU	P2.3
	
	S4	EQU	P1.3
	S5	EQU	P1.4
	
	LED1	EQU	P1.6;;两个LED
	LED2	EQU	P1.7
	
	JDQ	EQU	P1.5;;继电器
	
	SMGBZ1	EQU	0X30
	DS1	EQU	0X31
	
	ZT	EQU	DS1+4
	JSBZ1	EQU	ZT+1;0-39的计数
	JSBZ2	EQU	ZT+2;计时标志，用于闪烁和计时
	JSBZ3	EQU	JSBZ2+2;;继电器通断两次的计时和计数
	
	ORG	0
	JMP	MAIN
	ORG	0XB
	JMP	TimeInterupt
	
MAIN:
	MOV	SP,#0X70
	MOV	R0,#0x70
	CLR	A
MA1:	MOV	@R0,A		;数据全清0
	DJNZ	R0,MA1	
	CALL	JDQLC_STOP
	CALL	Time0Init
	
;主循环	
LOOP:	CALL	AJPD
	CALL	RUN
	JMP	lOOP

;主运行函数
RUN:	MOV	A,ZT
	CJNE	A,#1,RR1
	JMP	RUN1
RR1:	CJNE	A,#2,RR2
	JMP	RUN2
RR2:	RET

;;0-39循环
RUN1:
	MOV	DS1+0,#0X10
	MOV	DS1+1,#0X10
	MOV	A,JSBZ1
	MOV	B,#10
	DIV	AB
	MOV	DS1+2,A
	MOV	DS1+3,B
	
	U16DAYV	JSBZ2,1000
	JC	RUN1_1
	U16MOV	JSBZ2,0
	INC	JSBZ1
	MOV	A,JSBZ1
	CJNE	A,#39+1,RUN1_1
	MOVJSBZ1,#0
RUN1_1:
	RET
	
;;FFFF闪烁	
RUN2:	U16DAYV	JSBZ2,500
	JC	RUN2_1
	MOV	DS1+0,#0X10
	MOV	DS1+1,#0X10
	MOV	DS1+2,#0X10
	MOV	DS1+3,#0X10
	SETB	LED1
	SETB	LED2
	U16DAYV	JSBZ2,1000
	JC	RUN2_2
	U16MOV	JSBZ2,0
	JMP	RUN2_2
RUN2_1:
	MOV	DS1+0,#0X0F
	MOV	DS1+1,#0X0F
	MOV	DS1+2,#0X0F
	MOV	DS1+3,#0X0F
	CLR	LED1
	CLR	LED2	
RUN2_2:
	CALL	JDQLC
	
	RET
	
;按键判断
AJPD:
	JNB	S4,AJ1
	JNB	S5,AJ2
	RET
AJ1:	JNB	S4,$
	MOV	ZT,#2
	CALL	JDQLC_START
	RET
AJ2:	CALL	JDQLC_STOP
	SETB	LED1
	SETB	LED2
	JNB	S5,$
	MOV	ZT,#1
	MOV	JSBZ1,#0
	U16MOV	JSBZ2,0	
	RET

JDQLC_START:
	U16MOV	JSBZ3,0
	RET
JDQLC_STOP:
	U16MOV	JSBZ3,30000
	SETB	JDQ
	RET
;继电器通断两次
JDQLC:
	U16DAYV	JSBZ3,1000
	JNC	JDQ_1
	CLR	JDQ;通1s
	RET
JDQ_1:	U16DAYV	JSBZ3,1500
	JNC	JDQ_2
	SETB	JDQ;断0.5s
	RET
JDQ_2:	U16DAYV	JSBZ3,1500+1000
	JNC	JDQ_3
	CLR	JDQ;通1s
	RET
JDQ_3:	U16DAYV	JSBZ3,3000
	JNC	JDQ_4
	SETB	JDQ;断
JDQ_4:	RET
		

;;定时器初始化
Time0Init:
	MOV	TMOD,#0X01
	MOV	TH0,#HIGH(65536-1000)
	MOV	TL0,#LOW(65536-1000)
	SETB	TR0
	SETB	ET0
	SETB	EA
	RET
	
;;数码显示
SMXS:
	INC	SMGBZ1
	MOV	A,SMGBZ1
	SUBB	A,#4
	JC	SMXS1
	MOV	SMGBZ1,#0
	
SMXS1:
	MOV	P2,#0XF0
	MOV	A,SMGBZ1
	ADD	A,#DS1
	MOV	R0,A
	MOV	A,@R0
	MOV	DPTR,#TABD
	MOVC	A,@A+DPTR
	MOV	P0,A
	MOV	DPTR,#TABW
	MOV	A,SMGBZ1
	MOVC	A,@A+DPTR
	MOV	P2,A
	RET
	
TABD:;段码
DB0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90
DB0X88,0X83,0XC6,0XA1,0X86,0X8E,0XFF,0XBF
TABW:;位码
DB0xF1,0xF2,0xF4,0xF8	


;;定时器0中断
TimeInterupt:
	PUSH	PSW
	PUSH	ACC
	
	MOV	TH0,#HIGH(65536-1000)
	MOV	TL0,#LOW(65536-1000)
	CALL	SMXS	
	U16INC	JSBZ2
	U16DAYV	JSBZ3,30000
	JNC	TimeOut
	U16INC	JSBZ3

	
TimeOut:
	POP	ACC
	POP	PSW
	RETI
	
	END