求89c51单片机制作简易电子琴的c程序及源代码答:{5,8,5,4,3,2,1,1,1,2,3,3,1,3,4,5,5,5,8,5,4,3,5,2,4,3,2,6,5,2,3,1,1,0,5,3,6,8,7,6,7,5,3,9,9,9,8,7,6,8,5,5,5,3,6,8,7,6,7,8,9,5,6,7,8,9,5,8,8,-1}, //《我爱北京天安门》{3,5,8,5,6,0,6,5,3,3,5,5,3,5,6,8,9,8,5,3...
用八个按钮控制p1端口使电子琴发出do,re,mi,fa,so,la,si,deo(用单片机...答:ORG 0000H LJMP MAIN ORG 000BH LJMP T0ISR ORG 0030H MAIN:MOV SP,#5FH MOV TMOD,#01H SETB ET0 SETB EA LOOP:MOV DPTR,#FREQ MOV A,P2;控制高中低音区 MOV R1,#0 ANL A,#03H JB ACC.0,LOOP01 MOV R1,#14 SJMP LOOP0 LOOP01:JB ACC.1,LOOP0 MOV R1,#28 LOOP0:JB P0....