volt.c

高精度数控毫伏电压源的程序,使用8051控制器,dac76

#include "reg52.h"
//#include "Port_define.h"
#include"DRIVER_1602.h"
#define uchar unsigned char
#define uint  unsigned int
#define KT 30 //按键消抖参数


sbit K1U=P0^5;   
sbit K1D=P0^4;
sbit K2U=P0^3;
sbit K2D=P0^2;
sbit K3U=P0^0;   
sbit K3D=P0^1;

sbit cs=P1^7;
sbit Data=P1^4;
sbit clk=P1^3;
sbit clr=P1^6;
sbit ld=P1^5;

uchar key1=0,key2=0,key3=0,temp=0;
uint volt;
/**************************DAC7611驱动*********************************************/
void DAC7611(uint x)
{ uchar i;
  cs=0;
  for(i=0;i<=11;i++)
   {clk=0;
    if((x&0x800)==0) Data=0;
      else Data=1;
    x<<=1;
    clk=1;}
  cs=1; }

void out(uint x)
{
 ld=0;
 clr=1;
 DAC7611(x);
}

/***********************************************************************/
/***********************************按键扫描**************************************/
void key(void)
{uint voltemp; 
 voltemp=volt;
 key1=(voltemp%10000)/1000;
 key2=(voltemp%1000)/100;
 key3=(voltemp%100)/10;
  if(K1U==0)
 {temp++;
	if(temp>KT)
	{temp=0; 
	key1++;}
 }

  if(K1D==0)
 {temp++;
	if(temp>KT)
	{temp=0;
	key1--;} 		   
 }

 
  if(K2U==0)
 {temp++;
	if(temp>KT)
	{temp=0; 
	key2++;}
 }

  if(K2D==0)
 {temp++;
	if(temp>KT)
	{temp=0;
	key2--;
	if(key2>9)key2=0;} 		   
 }
 
 
 
   if(K3U==0)
 {temp++;
	if(temp>KT)
	{temp=0; 
	key3++;}
 }

  if(K3D==0)
 {temp++;
	if(temp>KT)
	{temp=0;
	key3--;
	if(key3>9)key3=0;} 		   
 }		   

volt=key1*1000+key2*100+key3*10;
if(volt>=4095){volt=0;}
//if(volt>4095){volt=0;}
}

/*********************************************************************************/
/*****************************LCD应用层驱动*****************************************/
void disp(unsigned int x)		
 {
  LCD_set_xy(5,0);
  LCD_en_dat((x%10000)/1000+48);
  LCD_en_dat('.');
  LCD_en_dat((x%1000)/100+48);                                
  LCD_en_dat((x%100)/10+48);
  LCD_en_dat(x%10+48);
}

void disp1(uchar x)		
 {
  LCD_set_xy(0,1);
  LCD_en_dat((x%1000)/100+48);                                
  LCD_en_dat((x%100)/10+48);
  LCD_en_dat(x%10+48);
 }
void disp2(uchar x)		
 {
  LCD_set_xy(4,1);
  LCD_en_dat((x%1000)/100+48);                                
  LCD_en_dat((x%100)/10+48);
  LCD_en_dat(x%10+48);
  }

void disp3(uchar x)		
 {
  LCD_set_xy(9,1);
  LCD_en_dat((x%1000)/100+48);                                
  LCD_en_dat((x%100)/10+48);
  LCD_en_dat(x%10+48);
  }


/*********************************************************************************/
void main(void)
{ uint dvolt,voltreal;
  P0=0xFF;

  volt=0;
  LCD_init();
  ld=0;
 clr=1; 
  while(1)    
  {dvolt=voltreal;
   key();
    
/*	
	 LCD_cls();//清屏

    delay_nms(2); 
        LCD_write_string(0,0,"1602 test");
        LCD_write_string(5,1,"awakening");
    
        delay_nms(200);

        LCD_cls();
    delay_nms(2); 
        LCD_write_string(0,0,"test 1602");
        LCD_write_string(0,1,"1234567890");
		LCD_write_char(0,1,'a');
  
        delay_nms(200); 
		
*/
	    LCD_write_string(0,0,"Volt:");
       	LCD_write_string(11,0,"V");
		disp(volt);
		disp1(key1);
		disp2(key2);
		disp3(key3);
	//    LCD_write_string(0,1,1234);
/*****************精度校正************************/
  if((volt>0)&&(volt<=816))
  {voltreal=volt-1;}
  if((volt>816)&&(volt<=2000))
  {voltreal=volt-2;}
  if((volt>2000)&&(volt<=3200))
  {voltreal=volt-3;}
  if((volt>3200)&&(volt<=3900))
  {voltreal=volt-4;}
  if((volt>3900)&&(volt<=4095))
  {voltreal=volt-5;}
/************************************************/


   if(dvolt!=voltreal)
   {DAC7611(voltreal);
   dvolt=voltreal;
	}         
  }
}