PWM调速和光电传感器测速

SpeedTest.c

#include<reg52.h>
#include<stdio.h>

#define uchar unsigned char
#define uint unsigned int


#define KongNums 20	//码盘上孔的数量
#define HighTime 500	//高电平持续时间
#define LowTime 500	//低电平持续时间

sbit Kong = P0^0;	//是否有孔
sbit led1 = P1^0;	//LED指示灯
sbit LeftInc = P2^0;
sbit LeftInd = P2^1;
sbit LeftEn = P2^2;
sbit RightIna = P2^3;
sbit RightInb = P2^4;
sbit RightEn = P2^5;


uint num = 0;	//计数器
uint testnums = 0;//检测到的经过的孔的数量
uint speed = 0;//速度


//左右电机的控制
void drive(void){
	//LeftInc = 1;
	//LeftInd = 0;											 
	//LeftEn = 1;
	RightIna = 0;
	RightInb = 1;
	RightEn = 1;
}


void delayms(uint xms){
	uint i,j;
	for (i = xms; i > 0; i--){
		for (j = 110; j > 0; j--);
	}
}


//初始化串口（52单片机，9600波特率，12MHz晶振）			 
void init_UART(void){
	RCAP2L = 0xD9;
	RCAP2H = 0xFF;
	T2CON = 0x34;
	SCON = 0x50;
}

//初始化
void init(void){
	TH0 = (65536-50000)/256;
	TL0 = (65536-50000)%256;
	TH1 = (65536-HighTime)/256;
	TL1 = (65536-HighTime)%256;
	EA = 1;
	TMOD = 0x11;
	ET0 = 1;
	TR0 = 1;
	ET1 = 1;
	TR1 = 1;
	init_UART();
}

//发送1字节到串口
void UART_send_byte(uint dat){
	SBUF = dat;
	while (TI == 0);
	TI = 0;
}

//处理数据并发送到串口
void send_data_UART(uint temp){
	//UART_send_byte(temp/10 + '0');
	//UART_send_byte(0 + '0');
	UART_send_byte(temp/KongNums + '0');
	UART_send_byte('.');
	UART_send_byte(((temp%KongNums)*10)/KongNums  + '0');
	UART_send_byte((((temp%KongNums)*10)%KongNums)/2  + '0');
	UART_send_byte('r');
	UART_send_byte('\\');
	UART_send_byte('s');
	UART_send_byte('\r');
	UART_send_byte('\n');
}

void main(){
	init();
	drive();
	while (1) {
		if ( Kong == 1 ){
			testnums++;
			while ( Kong == 1 );
		}	
		
	}
}

//每隔一段时间向串口发送信息
void T0_time() interrupt 1{
	TH0 = (65536-50000)/256;
	TL0 = (65536-50000)%256;
	num++; 
	if ( num == 20 ){
		num = 0;
		led1=~led1;
		//speed = testnums/KongNums;
		send_data_UART(testnums);
		testnums = 0;

	}

}

//发射高低脉冲
void T1_time() interrupt 3{
	if ( RightEn == 0 ){
		TH1 = (65536 - HighTime)/256;
		TL1 = (65536 - HighTime)%256;
		RightEn = 1;
	}else{
		TH1 = (65536 - LowTime)/256;
		TL1 = (65536 - LowTime)%256;
		RightEn = 0;
	}
}