51单片机数控直流电源代码

ID:324477 · 发表于 2018-5-13 11:03

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uint aa,b,bb;
sbit p1=P2^7;
sbit p2=P2^6;
sbit p3=P2^5;
sbit p4=P2^4;
sbit dp=P0^7;
sbit an1=P1^4;
sbit an2=P1^5;
sbit an3=P1^6;
sbit CLK=P1^2;/*??DAC????*/
sbit CS=P1^1;
sbit DIN=P1^3;
uchar code SegCode[12] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff,0xc1};
int moshi=0;
void DelayMs(uchar n)
{
      uchar j;
      while (n--)
      {
            for (j = 0; j < 113; j++);
      }
}

void keyscan1()       /*??*/
{
if(an1==0)
   {  aa=0;
            bb=0;

      }
while(an1==0);
}

void keyscan2()       /*??1???1*/
{
if(an2==0)
   {
                     if(aa<100)
                     {
                              aa=aa+1;
                  bb++;
                     }
      }
while(an2==0);
}

void keyscan3() /*??2???1*/
{
if(an3==0)
{
         if(aa>0)
               {
                     aa=aa-1;
         bb--;
               }
      }
  while(an3==0);
}

/*????*/
void display(void)
{  p1=0;p2=0;p3=0;p4=0;
      if(bb/100%10==0)
P0=SegCode[10];
else
      P0=SegCode[bb/100%10];
      p1=1;p2=0;p3=0;p4=0;
      DelayMs(3);

      p1=0;p2=0;p3=0;p4=0;
      P0=SegCode[bb/10%10];
      dp=0;
      p1=0;p2=1;p3=0;p4=0;
      DelayMs(3);

      p1=0;p2=0;p3=0;p4=0;
      P0=SegCode[bb%10];
      p1=0;p2=0;p3=1;p4=0;
      DelayMs(3);

      p1=0;p2=0;p3=0;p4=0;
      P0=SegCode[11];
      p1=0;p2=0;p3=0;p4=1;
      DelayMs(3);

      p1=0;p2=0;p3=0;p4=0;
}

void DA_Conver(unsigned int DAValue)
{
   unsigned char i;
   DAValue <<= 6;
   CS = 0;
   CLK = 0;

   for(i = 0; i < 12; i++)
   {
      DIN = (bit)(DAValue & 0x8000);
      CLK = 1;
      DAValue <<= 1;
      CLK = 0;
   }
   CS = 1;
   CLK = 0;
}

float zh (float k)
{
  float DA;
  DA=k*1024/500;       /*2.5v????!*/
  return DA;  }
void init_timer()
{
TMOD=0x01;
      TH0=(65536-3500)/256;
      TL0=(65536-3500)%256;
      EA=1;
      ET0=1;
      TR0=1;
            }

void main()
{long DAValue=0;
  aa=0;

         init_timer();

  while(1)
  {
DAValue=zh(aa);  /*????*/
      DA_Conver(DAValue);
         keyscan1();
      keyscan2();
      keyscan3();

      }
  }

void time0() interrupt 1
      {       TH0=(65536-3500)/256;
      TL0=(65536-3500)%256;
      b++       ;
      if(b==2)
      {b=0;
      display(); }
      }

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