text1.c

51编写的AD7714的测试程序

#include <reg51.h>
#define uchar unsigned char
#define WL 1
#define h_filter 0xcf
#define l_filter 0xa0
#define mode 0x20

uchar data ad_data[3];
uchar data sample[16][3];
uchar bdata temp;
sbit  ad_cs   = P1^1;
sbit  ad_out  = P1^3;
sbit  ad_in   = P1^4;
sbit  ad_sclk = P1^0;
sbit  ad_dr   = P1^2;

sbit MSB = temp^7;
sbit LSB = temp^0;

void delay(unsigned int k)
{
      for(;k>0;k--){;}
}

void write_reg ( void )
{
    uchar i;
    ad_cs = 1;
    ad_sclk = 0;
    ad_cs = 0;
    for (i=0;i<8;i++)
    {
        ad_in = MSB;
        ad_sclk = 1;
        ad_sclk = 0;
        temp<<=1;
    }
    ad_cs = 1;
}
void read_reg ( void )
{
    uchar i,j;
    temp = 0;
    ad_cs = 1;
    ad_sclk = 0;
    ad_cs = 0;
    for (i=0;i<(2+WL);i++)
    {
        for( j=0;j<8;j++ )
        {
            temp<<=1;
            ad_sclk = 1;
            ad_sclk = 0;
            LSB = ad_out;
        }
        ad_data[i] = temp;
    }
}
void init_ad ( void )
{
    temp = 0x26;
    write_reg ();/*写通信寄存器,下次写滤波高*/
    temp = h_filter;
    write_reg ();/*写滤波高寄存器*/
    temp = 0x36;
    write_reg ();/*写通信寄存器,下次写滤波低*/
    temp = l_filter;
    write_reg ();/*写滤波低寄存器*/
    temp = 0x16;
    write_reg ();/*写通信寄存器,下次写模式*/
    temp = mode;
    write_reg ();/*写模式寄存器*/
}
void rst_ad ( void )
{
    uchar i;
    ad_cs = 1;
    ad_sclk = 0;
    ad_cs = 0;
    ad_in = 1;
    for ( i=0;i<40;i++ )
    {
        ad_sclk = 1;
        ad_sclk = 0;
    }
}


main()
{
    //uchar x;
	 unsigned char i,a[3]={'0','0','0'};
//	TMOD=0x20;
//	TL1=0xfd;TH1=0xfd;
//	SCON=0xd8;PCON=0x00;
//	TR1=1;
   // rst_ad ();
//bee:    init_ad ();
    //for ( x=0;x<10; x++ )
		   
	 rst_ad ();   

while(1)
{       
        
 
        init_ad ();
        temp = 0x5e;
        write_reg ();
		 while ( ad_dr );
        read_reg ();
//		for(i=0;i<3;i++)
	//	{
	//		SBUF=ad_data[i];
	  //      while(TI==0);
	  //      TI=0;
	//	}
delay(50000);
delay(50000);
//delay(50000);
        
    }
  //  goto bee;
}