STC8單片機ad數模轉換速度電壓源程序

ID:460161 · 發表于 2019-1-2 15:54

include "STC8.h"
#include "intrins.h"

typedef unsigned char BYTE;
typedef unsigned int WORD;

#define FOSC          11059200UL
#define BRT          (65536 - FOSC / 9600 / 4)

bit busy;
char wptr;
char rptr;
char buffer[16];

void Delay(WORD n)
{
WORD x;

while (n--)
{
      x = 5000;
      while (x--);
}
}

void UartIsr() interrupt 4 using 1
{
if (TI)
{
      TI = 0;
      busy = 0;
}
if (RI)
{
      RI = 0;
      buffer[wptr++] = SBUF;
      wptr &= 0x0f;
}
}

void UartInit()
{
SCON = 0x50;
TMOD = 0x00;
TL1 = BRT;
TH1 = BRT >> 8;
TR1 = 1;
AUXR = 0x40;
wptr = 0x00;
rptr = 0x00;
busy = 0;
}

void UartSend(char dat)
{
while (busy);
busy = 1;
SBUF = dat;
}

void UartSendStr(char *p)
{
while (*p)
{
      UartSend(*p++);
}
}

void InitADC()
{
P1M0 = 0xff;
P1M1 = 0xff;
      P0M0 = 0xff;
P0M1 = 0xff;
      ADCCFG = 0x0f;                            //設置ADC時鐘為系統時鐘/2/16/16
ADC_CONTR = 0x80;                         //使能ADC模塊
}

BYTE GetADCResult(BYTE ch)
{
      ADC_CONTR |= (0x40+ch);
      _nop_();
_nop_();

      _nop_();
_nop_();
      _nop_();
_nop_();_nop_();
_nop_();_nop_();
_nop_();_nop_();
_nop_();_nop_();
_nop_();_nop_();

while (!(ADC_CONTR & 0x20));          //查詢ADC完成標志
      ADC_CONTR &= ~ADC_FLAG;       //Close ADC
ADC_CONTR &= ~0x20;                   //清完成標志
return ADC_RES;                         //讀取ADC結果
}

void ShowResult(BYTE ch)
{
//UartSend(ch);                //Show Channel NO.
UartSend(GetADCResult(ch));    //Show ADC high 8-bit result

//if you want show 10-bit result, uncomment next line
// SendData(ADC_LOW2);          //Show ADC low 2-bit result
}

void main()
{
BYTE i=0;
      UartInit();
ES = 1;
EA = 1;
//UartSendStr("Uart OK !\r\n");

      InitADC();                   //Init ADC sfr

while (1)
{
            InitADC();
            //UartSend(1);
            ShowResult(11);
            Delay(100);

            InitADC();
            UartSend(2);
            //ShowResult(12);
            Delay(100);

            InitADC();
            UartSend(3);
            //ShowResult(13);
            Delay(100);

            InitADC();
            UartSend(4);
            //ShowResult(14);
            Delay(100);

}
}

ID:838732 · 發表于 2024-5-15 17:36

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STC8單片機ad數模轉換速度電壓源程序