sx24c02.asm

单片机例程打包 液晶 AD EEPROM LED 电机 BEEP 键盘等

;天逸版存储器AT24c02的开机计数器，每按天逸版复位键一次最未一位数码管显示并自动加1,可作为多种用途运用！
;***************************************************************************
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;***************************************************************************
SDA24	EQU	P2.7
SCLK24	EQU	P3.6
	ORG	0000H
	AJMP	MAIN
	ORG	0030H
MAIN:
	CLR	P3.7		
	MOV	DPTR,#TAB
	MOV	A,#00H		
	LCALL	RD24
	CJNE	A,#10,TT
TT:	JNC	TT1
	AJMP	TT2
TT1:	MOV	A,#00
TT2:	MOV	30H,A
	MOVC	A,@A+DPTR	
	CLR	P2.6		
	MOV	P0,A		
	MOV	A,30H
	INC	A
	MOV	B,A
	MOV	A,#00H
	LCALL	WT24
	AJMP	$
TAB:	DB	28H,7EH,0A2H,62H,74H,61H,21H,7AH,20H,60H


RD24:  PUSH ACC				
        SETB SDA24				
        CLR SCLK24			
        CALL START24	
        MOV A,#0A0H  			
        CALL SHIFT8 		
        CALL ACK			
        POP ACC  					
        CALL SHIFT8 				
        CALL ACK					
        CALL START24				
        MOV A,#0A1H  			
        CALL SHIFT8				
        CALL ACK					
        SETB SDA24				
        MOV R7,#8					
        CLR A						
        SETB SDA24				
RD000:  RL A					
        SETB SCLK24				
        MOV C,SDA24				
        MOV ACC.0,C				
        CLR SCLK24				
        DJNZ R7,RD000			
        RET						
;-------------------------------
WT24:   PUSH ACC					
        SETB SDA24				
        CLR SCLK24				
        CALL START24				
        MOV A,#0A0H  			
        CALL SHIFT8  			
        CALL ACK					
        POP ACC  					
        CALL SHIFT8  			
        CALL ACK					
        MOV A,B  					
        CALL SHIFT8				
        CALL ACK					
        CALL STOP					
        CALL DELAY2				
        RET
; -------------------------------
START24:CLR SDA24		
        SETB SDA24
        SETB SCLK24
        CLR SDA24 
        CLR SCLK24
        RET
STOP:   CLR SDA24		
        SETB SCLK24
        SETB SDA24
        RET
ACK:    SETB SCLK24		
        CLR SCLK24
        RET
SHIFT8: MOV R7,#8		
SH01:   RLC A
        MOV SDA24,C
        SETB SCLK24
        CLR SCLK24
        DJNZ R7,SH01
        RET

DELAY2:			
	NOP
	NOP
	NOP
	NOP
	RET
END