74hc595驱动数码管实例程序.docx

/* 程序内容：利用动态扫描和定时器1在数码管上显示出从765432开始以1/10秒的速度往下递减直至765398并保持显示此数，与此同时利用定时器0以500MS速度进行流水灯从上至下移动，当数码管上数减到停止时，实验板上流水灯也停止然后全部开始闪烁，3秒后（用T0定时）流水灯全部关闭、数码管上显示出“HELLO”。到此保持住。编写人：李英杰硬件支持：12MHz 、74hc595驱动数码管、对应YL-48开发板时间： 2012.8.22备注：参考郭天祥十天学会单片机 */#include#include#define uint unsigned int /宏定义#define uchar unsigned char /宏定义unsigned char code duan=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xc0,0xc7,0xc7,0x86,0x89; / 共阳数码管位码值unsigned char code wei=0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01;unsigned char disbuf=7,6,5,0,0,0,10,11,12,13,14; /数码管初值sbit si=P22; sbit sclk=P24;sbit slck=P23;/void senda();void send();void out();void init(); void delay (unsigned char h);uint temp,t0,t1,shu,flat,flat1; /flat为流水灯运行标志位、 flat1为数码管标志位uchar m,n,num;main() shu=432; / disbuf3=shu%10/10;/ disbuf4=shu/10%10;/ disbuf5=shu%10; init(); while(1) if(flat1=0)/flat1为1，数码管递减中 for(n=0,m=0;n6,m6;n+,m+) send(); out(); / while(1); else/当数码管递减完后、显示hello for(n=6,m=0;n11,m5;n+,m+) send(); out(); void init() temp=0xfe; P1=temp; TMOD=0x11; /定时器0、1 工作方式都为1 TH0=(65536-50000)/256; /定50ms的初值 TL0=(65536-50000)%256; TH1=(65536-50000)/256; TL1=(65536-50000)%256; EA=1; ET0=1; ET1=1; TR0=1; TR1=1;void time0() interrupt1 /定时器0 子函数 TH0=(65536-50000)/256; TL0=(65536-50000)%256; t0+; if(flat=0) if(t0=10) t0=0; temp=_crol_(temp,1); P1=temp; else P1=0xff; TH0=(65536-50000)/256; /重新定义初值 TL0=(65536-50000)%256; t0+; if(t0%10=0) P1=P1; if(t0=60) TR0=0; P1=0xff; flat1=1; void time1() interrupt 3 /定时器1 子函数 TH1=(65536-50000)/256; TL1=(65536-50000)%256; t1+; if(t1=2) t1=0; disbuf3=shu/100; disbuf4=shu/10%10; disbuf5=shu%10; shu-; if(shu=397) TR1=0; flat=1; / TR0=0; /*void senda(void)uint a ;for(a=0;a8;a+) sclk=0;si=num&0x80;num=num1;sclk=1; */void send(void)/ 数据传输 uchar a,b; / for(m=0;m6;m+) / if(b=0) b+;num=weim;for(a=0;a8;a+) sclk=0;si=num&0x80;num=num1;sclk=1; / senda(); if(b=1) b-; num=duandisbufn; for(a=0;a8;a+) sclk=0;si=num&0x80;num=num1;sclk=1; / senda(); / m+;