AT89C51单片机怎么用汇编语言让4个数码管同时显示abcd答:MOV 31H,#0aH MOV 32H,#0bH MOV 33H,#0cH MOV 34H,#0dH ACALL D0 JMP $-2 D0: MOV R0,#31H MOV R2,#11111110B MOV DPTR,#TAB D1: MOV R3, #250 DJNZ R3,ORL P3,#00001111B MOV A,@R0 MOVC A,@A+DPTR MOV P1, A D2: ...
单片机中LED显示电路用三极管驱动电路怎么连接啊?四个数码管。答://单片机中LED显示电路用三极管驱动电路四个数码管。可以参考一下 include<reg52.h> sbit led0=P3^2;sbit led1=P3^3;sbit led2=P3^4;sbit led3=P3^5;sbit ledd=P3^7;unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,...