av.c

这是一个模拟输出电压源程序

#include <REG51.H>
#include <absacc.h>

#define uchar   unsigned  char
#define unit    unsigned  int
#define  PORTA   XBYTE[0x07fff]
#define  PORTB   XBYTE[0x0bfff]
#define  PORTC   XBYTE[0x0dfff]
#define  PORTD   XBYTE[0x0ffff]

sbit P1_0=P1^0;
sbit P1_1=P1^1;
sbit P1_2=P1^2;
sbit P1_3=P1^3;
sbit P1_5=P1^5;
sbit P1_4=P1^4;
sbit P1_6=P1^6;
//uchar code sina[34]={0,76,88,100,109,117,123,127,128,127,123,117,109,100,88,76,64,
 //                    52,40,28,19,11,5,1,0,1,5,11,19,28,40,52,64};
uchar code sina[34]={0,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,
					   0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,
					   0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,					
                       0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa,0x0aa};

uchar code sinb[34]={0,3,1,0,2,7,13,22,32,43,56,68,81,92,103,112,119,
                     125,127,128,126,121,115,106,96,85,72,60,47,36,25,16,9};

uchar code sinc[34]={112,103,92,81,68,56,43,32,22,13,7,2,0,1,3,9,
                     16,25,36,47,60,72,85,96,106,115,121,126,128,127,125,119};

//0,147,144,139,135,130,125,120,115,111,108,105,103,102,103,104,106,
//          109,112,117,121,126,131,136,141,145,148,151,153,154,153,152,150};


void main(void)
 {
     uchar  i,j=0;
     P1=0x0ff;
	 TMOD=0;
	 SCON=0;
     EA=0;
      while(1)
        {
 	     for(i=1;i<33;i++)
            {

              P1=0x0fe;  
	          j=sina[i];
//		      P0=j;
	          PORTA=j;


              P1=0x0fd;
	          j=sina[i];
	          PORTB=j;

              P1=0x0fb;
	          j=sina[i];
	          PORTC=j;

              P1=0x0ff;
	          j=0x0ff;
		      PORTD=j;
            }
	}
 }