7289.c

来自「AT89S52控制ZLG7289扩展键盘和数码管显示代码」· C语言 代码 · 共 93 行

#include<reg52.h>																			  5
#define uchar unsigned char
#define uint unsigned int

sbit CS=P1^0;
sbit CLK=P1^1;
sbit DATA=P1^2;

sbit ACC7=ACC^7;
void Delay()			 //延时50us
{
   
		TMOD = 0x02;
        TH0 = 0XCE;
        TL0 = 0XCE;
        TR0 = 1;
        while ( !TF0 );
        TF0 = 0;
        TR0 = 0;
 
}  
//------------------写--------------
void Write(uchar d) 
{
    uchar t;
   
	ACC=d;
   for(t=8;t>0;t--)
    {
        DATA= ACC7;
        ACC <<= 1;

        CLK = 1;
        Delay();
        CLK = 0;
        Delay();
    } 
}



//-----纯指令-------

void cmd(uchar c)
{
    CS = 0;
    Delay();
    Write(c);
    CS = 1;
    Delay();
}
void cmd2(uchar a,uchar b)	   //指令带数据
{
	CS=0;
	Delay();
	Write(a);
	Delay();
	Write(b);
	Delay();
	CS=1;
}

void main()
{  while(1)
{
	 uint i;
	 uchar j;
	 Delay();          
	 cmd2(0xc8,0x00);
	 	 Delay();
	  cmd2(0xc9,0x01);
	  	 Delay();
	  cmd2(0xca,0x02);
	  	 Delay();
	   cmd2(0xcb,0x03);
	   	 Delay();
	  cmd2(0xcc,0x04);
	  	 Delay();
      cmd2(0xcd,0x05);
	  	 Delay();
	  cmd2(0xce,0x06);
	  	 Delay();
	  cmd2(0xcf,0x07);
	  	 Delay();
		 while(1)
		 {
		cmd(0xa3);

		for(i=255;i>0;i++)	
			for(j=255;j>0;j++);		   
}								
}
}