led.asm

试验仪自检程序

		.INCLUDE hardware.inc

	.DATA
DispTbl:					//显示段码表
	.DW 0x003F,0x0006,0x005B,0x004F,0x0066		//0,1,2,3,4
	.DW 0x006D,0x007D,0x0007,0x007F,0x006F		//5,6,7,8,9
	.DW 0x0077,0x007C,0x0039,0x005E,0x0079		//A,b,C,d,E
	.DW 0x0071,0x0073,0x00FF,0x0000			//F,P,全亮,全灭

	.RAM
	.PUBLIC DisplayBuff
DisplayBuff:	.DW 4 DUP(0)	//定义一个4存储单元的显示缓冲区，存入显示内容

	.CODE
//**********************//
//描述：初始化A口带数据缓存器的高电平为输出