;参照说明书连线,必须设置对比度 ;背光一定要加一只5~10欧姆的电阻 ,不然很难正常工作,功耗太大 RS EQU P2.2 RW EQU P2.1 E EQU P2.0 cs1 equ p2.3 cs2 equ p2.4 rst equ p2.5 Y EQU 31H X EQU 32H ZC EQU 33H COUNT EQU 34H COUNT1 EQU 35H COUNT2 EQU 36H COUNT3 EQU 37H ORG 0000H ljmp start ORG 100H START: