SST89C58电子盘电路及代码

文章摘要：read: movx a, @dptr ; read 1 byte data from ADC mov SFDT, a ; program into on-chip flash mov SFCM, #0Eh ; issue Byte-Program command acall Done? ; wait until done mov a, SFAL ; adjust the address of flash add

SST89C58电子盘电路及代码,标签：电路图讲解,电路图练习,http://www.88dzw.com

read:        movx  a,  @dptr         ; read 1 byte data from ADC

        mov   SFDT, a           ; program into on-chip flash
        mov   SFCM, #0Eh    ; issue Byte-Program command
        acall   Done?          ; wait until done

        mov   a,  SFAL          ; adjust the address of flash
        add    a,  #1
        mov   SFAL, a
        mov   a,  SFAH
        addc  a,  #0        
        mov   SFAH, a

        djnz  B,   read
        djnz  R7, read

        anl   SFCF, #0BFh        ; disable IAP
        ret                     
;========================================
Compare:      mov   dptr,    #message         ;  point to message

        mov   SFAH,  #high(FlashAddrs)
        mov   SFAL,  #low(FlashAddrs)

        orl      SFCF, #40h            ; IAPEN=1
                      clr      F0
        mov   R7,   #2
        mov   B,    #0

verify:        clr       a
        movc  a,    @a+dptr           ; get  original data in message
               inc     dptr
        mov   SFCM, #0Ch            ; issue BYTE-VERIFY command

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