at45db0.asm

60秒ISD2560语音芯片的汇编源程序

$INCLUDE (t89c51cc01.INC)

AT_SCK	EQU	P0.5
AT_SI	EQU	P0.6
AT_CS	EQU	P3.3
AT_SO	EQU	P3.7

	ORG	0030H
	AJMP	MAIN
	ORG	0100H

MAIN:	MOV	P0,#0FFH
	MOV	P3,#0FFH
	MOV	R3,#01H
	MOV	R4,#01H
	MOV	R5,#01H
	;MOV	30H,#5FH	
	;MOV	31H,#01H
	;MOV	32H,#02H
	;MOV	33H,#03H
	;MOV	34H,#04H
	;MOV	35H,#05H
	;MOV	36H,#06H
	;MOV	37H,#07H
	LCALL	WRITAT
	LCALL	READAT
	;LCALL	RDSTA
	;MOV	P2,A

RDSTA:	CLR	AT_CS		;读状态寄存器
	MOV	A,#57H
	LCALL	WRAT45
	LCALL	RDAT45
	SETB	AT_CS
	RET

WRITAT:	CLR	AT_CS
	CLR	AT_SCK
	MOV	A,#82H
	LCALL	WRAT45
	LCALL	SENADDR		;写入地址
	;MOV	R0,#30H		;待写的数据存放在30H-37H内存单元中
	;MOV	R1,#01H	
WRITAT1:;MOV	A,@R0
	MOV	A,#96H
	LCALL	WRAT45
	;INC	R0
	;DJNZ	R1,WRITAT1
	SETB	AT_SCK
	SETB	AT_CS
	RET

READAT:	CLR 	AT_CS
	CLR	AT_SCK
	MOV	A,#52H
	LCALL	WRAT45
	LCALL	SENADDR
	LCALL	UNVALID
	;MOV	R0,#40H		;读出的数据暂存在40H-47H内存单元中
	;MOV	R1,#01H
READAT1:;MOV	A,#63H
	LCALL	RDAT45
	;MOV	A,#63H
	MOV	P2,A		;
	;MOV	@R0,A
	;INC	R0
	;DJNZ	R1,READAT1
	SETB	AT_CS
	SETB	AT_SCK
	RET

WRAT45:	MOV	R2,#08H
WRAT451:CLR	AT_SCK
	RLC	A
	MOV	AT_SI,C
	SETB	AT_SCK
	DJNZ	R2,WRAT451
	RET

RDAT45:	MOV	R2,#08H
RDAT451:CLR	AT_SCK
	NOP
	SETB	AT_SCK		;
	MOV	C,AT_SO
	RLC	A
	SETB	AT_SCK
	DJNZ	R2,RDAT451
	RET
	
SENADDR:MOV	A,R5
	LCALL	WRAT45
	MOV	A,R4
	LCALL	WRAT45
	MOV	A,R3
	LCALL	WRAT45
	RET

UNVALID:
	MOV	A,#00H
	LCALL	WRAT45
	MOV	A,#00H
	LCALL	WRAT45
	MOV	A,#00H
	LCALL	WRAT45
	MOV	A,#00H
	LCALL	WRAT45
	RET
	END