prog19.asm

来自「主要是8051源代码」· 汇编 代码 · 共 23 行

;  PROG19 - Poll a button and turn on an LED
;
;  This Application Turns on an LED and Loops forever afterward.
;
;  Myke Predko
;  98.02.18
;
;  Hardware Notes:
;  80C520 Running at 1 MHz
;  P1.0 is the LED (to light, it is pulled down)
;  P1.1 is connected to a Momentary ON Switch that Pulls down the Line.

;  Variable Declarations

;  Mainline
 org 0                          ;  Execution Starts Here

Loop:                           ;  Loop Here Forever

  mov	 C,P1.1			;  Get the button State
  mov	 P1.0,C

  sjmp   Loop