51单片机时钟程序设计答:P2.7输出铃声,注意:铃声功放三极管应采用pnp管。以下是该程序:ORG 00H SETB TR0 JMP START ORG 000BH LJMP T0 START: MOV IE,#82H MOV TMOD,#01H MOV DPTR,#TAB MOV SP,#60H MOV 20H,#0 MOV R0,#0 MOV R1,#0 MOV R2,#0 MOV R3,#0 MOV R4,#0 MOV R5,#0 MOV R6,#0 ...
51单片机制作简易数字频率计程序答:include <reg52.h>#define uchar unsigned char#define uint unsigned intuchar duan[10]={0xc0,0Xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; //所需的段的位码//uchar wei[4]={0XEf,0XDf,0XBf,0X7f}; //位的控制端(开发板)uchar wei[4]={0X80,0X40,0X20,0X10}...
用51单片机编一个电子时钟的程序 八个数码管 要汇编编的 最简单的 只...答:ORG30H MAIN:MOV SP,#60H MOVR4,#20 MOVTMOD,#01H MOVTH0,#03CH;12M晶振时定时初值 MOVTL0,#0B0H SETBEA SETBET0 SETBTR0 MOVR0,#20 DISP:MOVA,26H MOVB,#10 DIVAB MOV20H,B;余数(百分秒位数)MOV21H,A;商(十分秒位数)MOVA,27H MOVB,#10 DIVAB MOV22H,B;余数(秒个位数...