移位寄存器74hc595控制8位数码管.doc

一 不用单片机串口电路原理图：C程序：#include#define uint unsigned int#define uchar unsigned charsbit QS=P20;/ 串行数据输入端sbit shuchu=P21;/ 存储寄存器脉冲输入sbit yiwei=P22;/ 移位寄存器脉冲输入sbit Q1=P23;/38译码器输入选择sbit Q2=P24;sbit Q3=P25;uchar shuma=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90;void delay(uint z)uint x,y;for(x=z;x0;x-)for(y=120;y0;y-);void wei(uchar z) /数码管位选择 Q1=z&0x01; Q2=(z1)&0x01; Q3=(z2)&0x01;void display()uchar i,j,temp;for(i=0;i8;i+)wei(i);temp=shumai;for(j=0;j8;j+)QS=temp&0x80;yiwei=0;yiwei=1;temp=temp1;shuchu=0;shuchu=1;delay(2);for(j=0;j8;j+) /消影QS=1;yiwei=0;yiwei=1;void main()while(1)display();二 用单片机串口（P30和P31）电路原理图：C程序：#include#define uint unsigned int#define uchar unsigned char/sbit QS=P30;/ 串行数据输入端sbit shuchu=P32;/ 存储寄存器脉冲输入/sbit yiwei=P31;/ 移位寄存器脉冲输入sbit Q1=P33;/38译码器输入选择sbit Q2=P34;sbit Q3=P35;uchar shuma=0x03,0x9f,0x25,0x0d,0x99,0x49,0x41,0x1f,0x01,0x09;/*由于串口发送是由低向高发送，所以得把数码从高低位调换 如0码为0xco 11000000换为00000011 0x03*/void delay(uint z)uint x,y;for(x=z;x0;x-)for(y=120;y0;y-);void wei(uchar z) /数码管位选择 Q1=z&0x01; Q2=(z1)&0x01; Q3=(z2)&0x01;void display()uchar i;for(i=0;i8;i+)wei(i); /选择数码管位SBUF=shumai; /向串口缓冲寄存器中存入数据while(!TI);/等待发送完成TI=0; /清楚发送完成标志shuchu=0; /输出shuchu=1;delay(2);SBUF=0xff;/消影while(!TI);TI=0;void main()/*单片机上电后默认为串口方式0，所以不需要设置串口模式*/EA=1; /开总中断/ES=1; /开串口中断/IE