ckzy.asm

本资源包含了单片机键盘、a/d、频率测试等源代码

       ORG 0000H
       AJMP MAIN

       ORG 100H
MAIN: setb p3.3
      mov scon,#00h
      acall disp

      mov a,#00h
      MOV DPTR,#7FFFH
      MOVX @DPTR,A
      acall delay
      mov a,#03h
      MOVX @DPTR,A
      acall delay
      mov a,#19h
      MOVX @DPTR,A
      acall delay
      mov a,#32h
      MOVX @DPTR,A
      acall delay
      mov a,#7fh
      MOVX @DPTR,A
      acall delay
      mov a,#0ffh



      AJMP MAIN

delay:mov r4,#250
d2:   mov r5,#250
d1:   mov r7,#150
d4:   nop
      nop
      djnz r7,d4
      djnz r5,d1
      djnz r4,d2
      ret
disp: mov r6,#5
      mov a,#01h
      mov dptr,#tab
d3:   movc a,@a+dptr
      mov sbuf,a
wait: jnb ti,wait
      clr ti
      inc a
      djnz r6,d3
      clr p3.3
      ret
tab:  db 3fh,06h,5bh,4fh,66h;
      db 6dh,7dh,07h,7fh,67h
      END