采用51单片机为主控电路,传感器用光电管,电路设计含转速采样电路。数码管采用4位一体共阴数码管。下载地址:
单片机转速测量程序与仿真.rar
(153.78 KB, 下载次数: 76)
部分源程序:(完整程序请自己下载)
#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; //光电传感器信号接在T1上
#define TIME_CYLC 200 //12M晶振,定时器5ms 中断一次 我们1秒计算一次转速 // 1000ms/5ms = 200
#define PLUS_PER 1 //码盘的齿数 ,这里假定码盘上有10个齿,即传感器检测到10个脉冲,认为1圈
#define K 100.0 //校准系数
unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar data Disbuf[4]; // 显示缓冲区
uint Tcounter = 0,speed,PlusCounter; //时间计数器
bit Flag_Fresh = 0; // 刷新标志
bit Flag_clac = 0; //计算转速标志
bit Flag_Err = 0; //超量程标志 //在数码管上显示一个四位数
void DisplayFresh(); //计算转速,并把结果放入数码管缓冲区
void ClacSpeed(); //初始化定时器T0
void init_timer0(); //初始化定时器T1
void init_timer1(); //延时函数
void Delay(uint ms);
void it_timer0() interrupt 1
{
TF0 = 0; //d定时器 T0用于数码管的动态刷新
TH0 = 0xEC;
TL0 = 0xA8; //78
Tcounter++;
if(Tcounter>TIME_CYLC)
{
PlusCounter = TH1*256 + TL1;
TH1=TL1 = 0x00;//脉冲计数清零
Tcounter = 0;//周期定时 清零
speed =60*PlusCounter/PLUS_PER;//
Flag_clac = 1; //周期到,该重新计算转速了
}
Flag_Fresh = 1;
}
void main(void)
{
Disbuf[0] = 0; //开机时,初始化为0000
Disbuf[1] = 0;
Disbuf[2] = 0;
Disbuf[3] = 0;
init_timer0();
init_timer1();
while(1)
{
if(Flag_Fresh)
{
Flag_Fresh = 0;
DisplayFresh(); // 定时刷新数码管显示
}
if(Flag_clac)
{
Flag_clac = 0;
ClacSpeed(); //计算转速,并把结果放入数码管缓冲区
}
if(speed>9999) //超量程处理//数码管显示字母'EEEE'
{
Disbuf[0] = 0x9e; //开机时,初始化为0000
Disbuf[1] = 0x9e;
Disbuf[2] = 0x9e;
Disbuf[3] = 0x9e;
}
}
}
//在数码管上显示一个四位数
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);
}
//计算转速,并把结果放入数码管缓冲区
void ClacSpeed()
{
Disbuf[0] = (speed/1000)%10;
Disbuf[1] = (speed/100)%10;
Disbuf[2] = (speed/10)%10;
Disbuf[3] = speed%10;
}
//初始化定时器T0
void init_timer0()
{
TMOD &= 0xf0; //定时10毫秒
TMOD |= 0x01;
TH0 = 0xC0;
TL0 = 0x00;
ET0=1;
EA=1;
TR0=1;
}
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