24c08读写程序.asm

串24c02读写程序

SCL                BIT             P2.3
SDA                BIT             P2.4
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   ORG             0000H
                   MOV             R4,#03H
                   LCALL           WR_DATA
                   MOV             R5,#8
AAS:               MOV             A,R4
                   LCALL           WBYTE
                   INC             R4
                   DJNZ            R5,AAS
                   LCALL           STOP24
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           RD_DATA
                   LCALL           RBYTE
                   MOV             P3,A                      ;1
                   LCALL           DDD
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           RBYTE
                   MOV             P3,A
                   LCALL           DDD                       ;2
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           RBYTE
                   MOV             P3,A
                   LCALL           DDD                       ;3
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           RBYTE
                   MOV             P3,A
                   LCALL           DDD                       ;4
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           RBYTE
                   MOV             P3,A
                   LCALL           DDD                       ;5
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           RBYTE
                   MOV             P3,A
                   LCALL           DDD                       ;6
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           RBYTE
                   MOV             P3,A
                   LCALL           DDD                       ;7
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           RBYTE
                   MOV             P3,A                      ;8
                   LCALL           SS
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   LCALL           STOP24
                   LCALL           SS
                   MOV             A,#01010101B
                   MOV             P3,A
YY:                JMP             YY
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
WR_DATA:           LCALL           ST24
                   MOV             A,#0A0H
                   LCALL           WBYTE
                   MOV             A,#00H
                   LCALL           WBYTE
                   RET
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
RD_DATA:           LCALL           ST24
                   MOV             A,#0A0H
                   LCALL           WBYTE
                   MOV             A,#00H
                   LCALL           WBYTE
                   NOP
                   NOP
                   LCALL           ST24
                   MOV             A,#0A1H
                   LCALL           WBYTE
                   RET
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
WBYTE:             NOP
                   NOP
                   MOV             R1,#8
WBY0:              CLR             SCL
                   RLC             A
                   MOV             SDA,C
                   SETB            SCL
                   DJNZ            R1,WBY0
                   CLR             SCL
                   NOP
                   NOP
                   SETB            SCL
                   NOP
                   NOP
                   JB              SDA,$
                   CLR             SCL
                   NOP
                   NOP
                   RET
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
RBYTE:             NOP
                   NOP
                   MOV             R1,#8
RBY0:              SETB            SCL
                   NOP
                   NOP
                   MOV             C,SDA
                   RLC             A
                   CLR             SCL
                   DJNZ            R1,RBY0
                   RET
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
DDD:               NOP
                   NOP
                   CLR             SDA
                   SETB            SCL
                   NOP
                   NOP
                   NOP
                   CLR             SCL
                   SETB            SDA
                   RET
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
ST24:              CLR             SCL
                   NOP
                   NOP
                   SETB            SDA
                   NOP
                   NOP
                   SETB            SCL
                   NOP
                   NOP
                   CLR             SDA
                   NOP
                   NOP
                   CLR             SCL
                   RET
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
STOP24:            CLR             SCL
                   NOP
                   NOP
                   CLR             SDA
                   NOP
                   NOP
                   SETB            SCL
                   NOP
                   NOP
                   SETB            SDA
                   NOP
                   NOP
                   CLR             SCL
                   RET
;//////////////////////////////////////////////////////////////////
SS:                MOV             R3,#05H
LA0:               MOV             R6,#0C8H
LA3:               MOV             R7,#0FAH
XX:                DJNZ            R7,XX
                   DJNZ            R6,LA3
                   DJNZ            R3,LA0
                   RET
;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
                   END