移位寄存器74hc595控制8位数码管(共5页).doc

精选优质文档-倾情为你奉上一 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)&