stc8a8k--5510ceshi代码

#include <stc8a8k.h>
#include <math.h>
#include <stdlib.h>

sbit LED=P1^7;
sbit clk=P1^0;
sbit oe=P1^1;

void Delay300ms()   //@24.000MHz
{
  unsigned char i, j, k;


  i = 37;
  j = 135;
  k = 138;
  do
  {
    do
    {
      while (--k);
    } while (--j);
  } while (--i);
}
void delay5us()   //@24.000MHz
{
  unsigned char i;

  i = 38;
  while (--i);
}
void delay500us()   //@24.000MHz
{
  unsigned char i, j;

  i = 16;
  j = 147;
  do
  {
    while (--j);
  } while (--i);
}

unsigned char ReadAdc(void)
{ 
  unsigned char i,Voltage;

  oe=1;
    for(i=8; i>0; i--)
  {
    clk=1;
    delay5us();
    delay5us();
    clk=0;  
  delay5us();   
//    delay5us();
  }
  oe=0;  
  delay500us();    //??????????
  Voltage=P2;

  return(Voltage);
}

void Timer0Init(void)   //0.5??@24.000MHz
{
  AUXR |= 0x80;   //?????1T??
  TMOD &= 0xF0;   //???????
  TL0 = 0xE8;   //???????
  TH0 = 0xFF;   //???????
  TF0 = 0;    //??TF0??
  TR0 = 1;    //???0????
   ET0 = 1;                                    //???????
}

void portmode()
{
  P0M0=0x00;P0M1=0x00;
  P1M0=0x00;P1M1=0x00;
  P2M0=0x00;P2M1=0x00;
  P3M0=0x00;P3M1=0x00;
  P4M0=0x00;P4M1=0x00;
  P5M0=0x00;P5M1=0x00;
  P6M0=0x00;P6M1=0x00;
  P7M0=0x00;P7M1=0x00;
}

void UartInit(void)   //9600bps@24.000MHz
{
  SCON = 0x50;    //8???,?????
  AUXR |= 0x40;   //?????1T??
  AUXR &= 0xFE;   //??1?????1???????
  TMOD &= 0x0F;   //???????
  TL1 = 0x8F;   //???????
  TH1 = 0xFD;   //???????
  ET1 = 0;    //?????%d??
  TR1 = 1;    //???1????
}
void UartSend(char dat)
{
  
    SBUF = dat;  
  while (!TI);
    TI = 0;
}
void main()
{  
  unsigned char dat;
    portmode();
  
    LED=0;
    Delay300ms();
    LED=1;
    Delay300ms();
    
    LED=0;
    Delay300ms();
    LED=1;
    Delay300ms();
    LED=0;
    Delay300ms();
    LED=1;
    Delay300ms();
    
    LED=0;
    Delay300ms();
    LED=1;
    Delay300ms();
    LED=0;
    Delay300ms();
    LED=1;
    Delay300ms();
    
    oe=1;
    
    UartInit();
    Delay300ms();
    UartSend(0x85);
      UartSend(0x0d);
        UartSend(0x0a);
          UartSend('a');
            UartSend(0x0d);
        UartSend(0x0a);
          
   LED=0;
    Delay300ms();
    LED=1;
    Delay300ms();
    
//      Timer0Init();
//      ET0=1;
  //  EA=1;
  while(1)
  {
      dat = ReadAdc();
     // P2=dat;
    
      UartSend(dat);
      UartSend(0x0d);
        UartSend(0x0a);
    Delay300ms();
    Delay300ms();
    Delay300ms();
  }
  
}

void TM0_Isr() interrupt 1
{
  static unsigned int aaa=0;
    static unsigned int bbb=0;
  aaa++;
  if(aaa>65530)
  {
    aaa=0;
    bbb++;
    if(bbb>10)
    {
      bbb=0;
      LED=!LED;
    }
     
  }
  //  clk = !clk;                                 //????
}

基准电压是2.6V；

所以在2.6V–0xFF;

但是，后面电压，就不对，感觉误差有点大。

原因后面查找下。

视频电平2V。。不是基准电压2V.