單片機轉速測量程序與仿真

ID:34643 · 發表于 2018-12-30 07:58

采用51單片機為主控電路，傳感器用光電管，電路設計含轉速采樣電路。數碼管采用4位一體共陰數碼管。下載地址：

單片機轉速測量程序與仿真.rar (153.78 KB, 下載次數: 78)

部分源程序：（完整程序請自己下載）
#include <REG52.H>
#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long
#define LED_DAT P0
sbit LED_SEG0 = P2^7;
sbit LED_SEG1 = P2^6;
sbit LED_SEG2 = P2^5;
sbit LED_SEG3 = P2^4;
sbit pin_SpeedSenser = P3^5;       //光電傳感器信號接在T1上
#define TIME_CYLC 200                      //12M晶振，定時器5ms 中斷一次我們1秒計算一次轉速 // 1000ms/5ms = 200
#define PLUS_PER 1                      //碼盤的齒數，這里假定碼盤上有10個齒，即傳感器檢測到10個脈沖，認為1圈
#define K       100.0                //校準系數
unsigned char code  table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar data Disbuf[4];                      // 顯示緩沖區
uint Tcounter = 0,speed,PlusCounter;                         //時間計數器
bit Flag_Fresh = 0;                      // 刷新標志
bit Flag_clac = 0;                               //計算轉速標志
bit Flag_Err = 0;                               //超量程標志 //在數碼管上顯示一個四位數
void DisplayFresh();                         //計算轉速，并把結果放入數碼管緩沖區
void ClacSpeed();                                  //初始化定時器T0
void init_timer0();                                  //初始化定時器T1
void init_timer1();                                  //延時函數
void Delay(uint ms);
void it_timer0() interrupt 1
{
      TF0 = 0;                                     //d定時器 T0用于數碼管的動態刷新
      TH0 = 0xEC;
      TL0 = 0xA8;                         //78
      Tcounter++;
      if(Tcounter>TIME_CYLC)
      {
            PlusCounter = TH1*256 + TL1;
         TH1=TL1 = 0x00;//脈沖計數清零
         Tcounter = 0;//周期定時清零
            speed =60*PlusCounter/PLUS_PER;//
               Flag_clac = 1;                      //周期到，該重新計算轉速了
      }
      Flag_Fresh = 1;
}

void main(void)
{
      Disbuf[0] = 0; //開機時，初始化為0000
      Disbuf[1] = 0;
      Disbuf[2] = 0;
      Disbuf[3] = 0;
         init_timer0();
      init_timer1();
      while(1)
      {
            if(Flag_Fresh)
               {
                     Flag_Fresh = 0;
                  DisplayFresh(); // 定時刷新數碼管顯示
               }
               if(Flag_clac)
               {
                     Flag_clac = 0;
                  ClacSpeed(); //計算轉速，并把結果放入數碼管緩沖區
               }
               if(speed>9999)       //超量程處理//數碼管顯示字母'EEEE'
               {
                  Disbuf[0] = 0x9e; //開機時，初始化為0000
                  Disbuf[1] = 0x9e;
                  Disbuf[2] = 0x9e;
                  Disbuf[3] = 0x9e;
               }
      }
}

//在數碼管上顯示一個四位數
void DisplayFresh()
{
      LED_DAT =~table[Disbuf[0]];
      LED_SEG3 = 1;
      Delay(10);
      LED_SEG3 = 0;
      Delay(3);
      LED_DAT =~table[Disbuf[1]];
      LED_SEG2 = 1;
      Delay(10);
      LED_SEG2 = 0;
      Delay(3);
      LED_DAT =~table[Disbuf[2]];
      LED_SEG1 = 1;
      Delay(10);
      LED_SEG1 = 0;
      Delay(3);
      LED_DAT =~table[Disbuf[3]];
      LED_SEG0 = 1;
      Delay(10);
      LED_SEG0 = 0;
      Delay(3);
}
//計算轉速，并把結果放入數碼管緩沖區
void ClacSpeed()
{
      Disbuf[0] = (speed/1000)%10;
      Disbuf[1] = (speed/100)%10;
      Disbuf[2] = (speed/10)%10;
      Disbuf[3] = speed%10;
}
//初始化定時器T0
void init_timer0()
{
      TMOD &= 0xf0; //定時10毫秒
      TMOD |= 0x01;
      TH0 = 0xC0;
      TL0 = 0x00;
      ET0=1;
      EA=1;
      TR0=1;
}