szz.c

各种基本的小程序,用到了实验板中的各个功能,很有用哦!

#include<AT89x51.H>
unsigned char code dispcode[]={
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
0x38,0x39};
unsigned int t;
unsigned int i,j;
unsigned char a,b,c,d,e,f,n;
sbit RS=P0^2;
sbit RW=P0^3;
sbit E=P0^4;
void delay(t)
{  
 for(i=0;i<t;i++)
 for(j=0;j<10;j++);
}
void fbusy(void)
{ 
   RS=0;
   RW=1;
   E=1;
   while(P2&0x80);
   E=0;
   delay(25);
}
void wc51r(unsigned char c)
{
  fbusy();
   RS=0;
   RW=0;
   P2=c;
   E=1;
   E=0;
   delay(25);
}
void wc51ddr(unsigned char d)
{  fbusy();
   RS=1;
   RW=0;
   P2=d;
   E=1;
   E=0;
   delay(25);
  }
void init(void)
{
wc51r(0x01);
wc51r(0x38);
wc51r(0x0c);
wc51r(0x06);
}
main()
{
while(1)
{
n++;
if(n==100)
{
a++;
if(a==10)
{
a=0;
b++;
if(b==6)
{
b=0;
c++;
if(c==10)
{
c=0;
d++;
if(d==6)
{
d=0;
e++;
if(e==10)
{
e=0;
f++;
if(f==3)
f=0;
}
}
}
}
}
}
wc51r(0x80);
wc51ddr(dispcode[f]);
wc51ddr(dispcode[e]);
wc51ddr(0x3a);
wc51ddr(dispcode[d]);
wc51ddr(dispcode[c]);
wc51ddr(0x3a);
wc51ddr(dispcode[b]);
wc51ddr(dispcode[a]);
n++;
}
}