sec.c

单片机C语言15个实验附有原理图和程序 是我的课程作业 以经过实践验证

//int0+int1
#include <stdio.h>
#include <reg51.h>
#include <intrins.h>
#define hi 0xd8
#define lo 0xf0   //10ms
#define hi1 0x3c
#define lo1 0xb0   //50ms
unsigned char led_no,array_no=8,mask=0xfe,disp[4],f[10],int_flag,key_count;
unsigned int tf0;
unsigned char code ledk[14]
       ={0x3f,0x06,0x5b,0x4f,0x66,0x6d,
        0x7d,0x07,0x7f,0x6f,0xf3,0x79,0x3e,0x31};//p10,E11,U12,r13
unsigned long t,time _at_ 0x30,time1 _at_ 0x40;
sbit P37=P3^7;sbit clk=P0^7;sbit sda=P0^6;               //74LS164
void delay(unsigned int n)
{ unsigned int i,j;
  for(i=0;i<n;i++)
     for(j=0;j<n;j++)
       ;}
void shift(unsigned char dx)
{static unsigned char d;
   unsigned char j=0;
    d=dx;
   	while(j<8)
	{if((d&0x80)!=0) sda=1;
       else  sda=0;
	   clk=0;clk=1;
	   d<<=1;j++;}  }


void hextodec(int xx)
 {xx=xx%1000;
 disp[3]=xx/1000;xx=xx%100;
disp[2]=xx/100;
disp[1]=xx/10;
disp[0]=xx%10;
}
void  int0() interrupt 0
{ if(key_count<5){key_count=0;int_flag++; 
  if(int_flag%2==1)TR1=1;
  if(int_flag%2==0)TR1=0; }}
  void t0() interrupt 1
{TH1=hi;TL1=lo;key_count++;}
void t1() interrupt 3
{TH1=hi;TL1=lo;tf0++;}
 void out()
 {time=(long)10*tf0;
  time1= ((TH1*256+TL1)-(hi*256+lo))*10/(long)(0x10000-(hi*256+lo));
   
if(time1>4)t=time/10+1;
else t=time/10;
hextodec((int)t);
  led_no++;if(led_no>3)led_no=0;
  if(led_no==2)shift(ledk[disp[led_no]]|0x80);
          else shift(ledk[disp[led_no]]);
  mask=_crol_(mask,1);if(mask==0xef)mask=0xfe;
   P2=mask;}  
    
void main(void)
{TMOD=0x11;TH1=hi;TL1=lo;TH0=hi1;TL0=lo1;ET0=1;ET1=1;EX0=1;IT0=1;EA=1;TR0=1,int_flag=0;
 while(1)
  {out();delay(2);if(time>99999){tf0=0;TH1=hi;TL1=lo;}}  }