74ls164 made of C51 program-EEWORLD

Collect

c51 74hc164--165--595c51

The 51 single-chip microcomputer drives the 74ls164 marquee. The advantage is that only two ports are used to achieve it. The circuit is shown in the figure below:

#include
#include 
#define uint unsigned int
#define uchar unsigned char
sbit dat=P2^6;
sbit clk=P2^7;
uchar ii;
uchar code seg7code[]=

{0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x00,0xff}; //0-9,-, all destroyed
void sendbyte(uchar seg)
{
 uchar num,c;
 num=seg7code[seg];
 for(c=0;c<8;c++)
 {
 dat=num&0x80;
 num=_crol_(num,1);
 clk=0;
 clk=1;
 }
}
void delayms(int ms)
{
 uchar mi,mj;
 for(;ms>0;ms--)
  for(mi=6;mi>0;mi--)
   for(mj=82;mj>0;mj--);
}
void main()
{
 for(ii=0;ii<10;ii++)
 {
 sendbyte(ii);
 delayms(200);
 }
}

Keywords：74ls164 Reference address：74ls164 made of C51 program

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