测试.c

74HC595芯片的单片机驱动

	 #include <reg51.h>
	 sbit LATCH=P1^3;													  //  led公共端口595
	 sbit SRCLK=P1^4;													//	 led公共端口595
	 sbit SER=P1^5;													   //	 led公共端口595
	 sbit LATCH2=P1^0;
	 sbit SRCLK2=P1^1;
	 sbit SER2=P1^2;
	#define uchar unsigned char
	#define uint unsigned int
	uchar i,j,d=0;
	void delay(uchar a)
	{		 int x=7000;
	     for (a;a>0;a--)
		      for(x;x>0;x--);
	}
	void sendbyte(uchar b)
	 
	{	
		  for(i=0;i<8;i++)
          	{
	          SRCLK=0;
			  SER=d;
			   d=~d;
			  SRCLK=1;
			  }
	       LATCH=0;
		   delay(1);  
		   LATCH=1;    
	}
	void send2byte(uchar c)
	{	   d=0;
	     for(j=0;j<15;j++)
		 {
		       SRCLK2=0;
			   SER2=d;
			   d=~d;
			   SRCLK2=1;
		  }
		  LATCH2=0;
		  delay(1);
	      LATCH2=1;
	}
	main()
	{
	    sendbyte(1);
		send2byte(1);
		while(1);
	}