基于51单片机的电机转速监测

#include<reg51.h> #include"lcd.h" #include"ds1302.h" #include"i2c.h" #include <intrins.h> #define uint unsigned int #define uchar unsigned char sbit DHT11_DATA=P3^7; sbit KEY0=P1^0; sbit KEY1=P1^7; sbit KEY2=P1^2; sbit BEEP=P2^2; uchar Overtime_counter; //判断等待是否超时的计数器。利用uchar型的数值范围进行自动延时控制（时长由初值决定），并判断是否超时 uchar bit_value; //从DATA总线上读到的位值 uchar T_data_H,T_data_L,RH_data_H,RH_data_L,checkdata;//校验过的温度高8位,温度低8位,湿度高8位,湿度低8位,校验和8位 uchar T_data_H_temp,T_data_L_temp,RH_data_H_temp,RH_data_L_temp,checkdata_temp;//未经校验的数据 uchar comdata; //从DHT11读取的一个字节的数据 void LcdDisplay(); uint num=0; uint t=0; uint count=0; uint set_quan=20; uint licheng=0; //--定义全局变量--// unsigned int num0 = 66,num1 = 23,n; //--声明全局函数--// void At24c02Write(unsigned char ,unsigned char ); unsigned char At24c02Read(unsigned char ); void Delay10ms(unsigned int c); //误差 0us void init() { TMOD=1; TH0=(65535-50000)/256; TH1=(65535-50000)%256; IT0=1; EX0=1; TR0=1; ET0=1; EA=1; } void Delay_10us(void); void Delay_100us(uint i); void Delay_100ms(uint i); /*****************从DHT11读取一个字节函数******************/ void Read_Byte(void); /*****************DHT11读取五个字节函数******************/ void Read_DHT11(void); void main() { LcdInit(); //Ds1302Init(); init(); KEY0=1; KEY1=1; KEY2=1; BEEP=0; // At24c02Write(2,12);//将路程写入存储 // Delay_100ms(1); // At24c02Write(1,23);//将路程写入存储 set_quan = At24c02Read(2); licheng=At24c02Read(0)*256+At24c02Read(1); while(1) { set_quan = At24c02Read(2); licheng=At24c02Read(0)*256+At24c02Read(1); if(KEY0==0) { // BEEP=!BEEP; set_quan++; At24c02Write(2,set_quan);//将设置的最大速度写入存储 } if(KEY1==0) { set_quan--; At24c02Write(2,set_quan);//将设置的最大速度写入存储 } if(KEY2==0) { licheng=0; At24c02Write(0,0);//将路程写入存储 Delay_100ms(1); At24c02Write(1,0);//将路程写入存储 } Read_DHT11();/////////调用温湿度读取子程序 Ds1302ReadTime(); LcdDisplay(); } } void Delay10ms(unsigned int c) //误差 0us { unsigned char a, b; //--c已经在传递过来的时候已经赋值了，所以在for语句第一句就不用赋值了--// for (;c>0;c--) { for (b=38;b>0;b--) { for (a=130;a>0;a--); } } } /******************************************************************************* * 函 数 名 : void At24c02Write(unsigned char addr,unsigned char dat) * 函数功能 : 往24c02的一个地址写入一个数据 * 输 入 : 无 * 输 出 : 无 *******************************************************************************/ void At24c02Write(unsigned char addr,unsigned char dat) { I2C_Start(); I2C_SendByte(0xa0, 1);//发送写器件地址 I2C_SendByte(addr, 1);//发送要写入内存地址 I2C_SendByte(dat, 0); //发送数据 I2C_Stop(); } /******************************************************************************* * 函 数 名 : unsigned char At24c02Read(unsigned char addr) * 函数功能 : 读取24c02的一个地址的一个数据 * 输 入 : 无 * 输 出 : 无 *******************************************************************************/ unsigned char At24c02Read(unsigned char addr) { unsigned char num; I2C_Start(); I2C_SendByte(0xa0, 1); //发送写器件地址 I2C_SendByte(addr, 1); //发送要读取的地址 I2C_Start(); I2C_SendByte(0xa1, 1); //发送读器件地址 num=I2C_ReadByte(); //读取数据 I2C_Stop(); return num; } void inter() interrupt 0 { count ++; } void timer() interrupt 1 { t++; if(t>=20) { t=0; num=count; if(count>=set_quan)BEEP=0; else BEEP=1; licheng=licheng+count; count=0; At24c02Write(0,licheng/256);//将路程写入存储 Delay_100ms(1); At24c02Write(1,licheng%256);//将路程写入存储 } TH0=(65535-50000)/256; TH1=(65535-50000)%256; } void LcdDisplay() { LcdWriteCom(0x80+0X40); LcdWriteData('0'+TIME[2]/16); //时 LcdWriteData('0'+(TIME[2]&0x0f)); LcdWriteData('-'); LcdWriteData('0'+TIME[1]/16); //分 LcdWriteData('0'+(TIME[1]&0x0f)); LcdWriteData('-'); LcdWriteData('0'+TIME[0]/16); //秒 LcdWriteData('0'+(TIME[0]&0x0f)); LcdWriteData(' '); // licheng=12345; LcdWriteData('0'+licheng/10000); LcdWriteData('0'+licheng%10000/1000); LcdWriteData('0'+licheng%1000/100); LcdWriteData('0'+licheng%100/10); LcdWriteData('0'+licheng%10); // LcdWriteData('0'+At24c02Read(0)/100); // LcdWriteData('0'+At24c02Read(0)%100/10); // LcdWriteData('0'+At24c02Read(0)%10); // LcdWriteData(' '); // LcdWriteData('0'+At24c02Read(1)/100); // LcdWriteData('0'+At24c02Read(1)%100/10); // LcdWriteData('0'+At24c02Read(1)%10); LcdWriteCom(0x80); // LcdWriteData('0'+TIME[4]/16); //月 LcdWriteData('0'+(TIME[4]&0x0f)); LcdWriteData('-'); LcdWriteData('0'+TIME[3]/16); //日 LcdWriteData('0'+(TIME[3]&0x0f)); LcdWriteData(' '); // LcdWriteData('0'+set_quan/1000);//显示设置的圈数上限 LcdWriteData('0'+set_quan%1000/100); LcdWriteData('0'+set_quan%100/10); LcdWriteData('0'+set_quan%10); LcdWriteCom(0x89); // LcdWriteData('0'+num/1000); LcdWriteData('0'+num%1000/100); LcdWriteData('0'+num%100/10); LcdWriteData('0'+num%10); LcdWriteData(' '); LcdWriteData('0'+T_data_H/10); LcdWriteData('0'+T_data_H%10); //显示温度 num1 // LcdWriteData('0'+num1/10); // LcdWriteData('0'+num1%10); //显示温度 num1 LcdWriteData('C'); } void Delay_10us(void) { uchar i; i--; i--; i--; i--; i--; i--; } void Delay_100us(uint i) { uchar j; for(;i>0;i--) { for(j=0;j<10;j++) Delay_10us(); } } void Delay_100ms(uint i) { uint j; for(;i>0;i--) { for(j=0;j<10000;j++) Delay_10us(); } } /*****************从DHT11读取一个字节函数******************/ void Read_Byte(void) { uchar i; for(i=0;i<8;i++) //循环8次，读取8bit的数据 { Overtime_counter=2; while((!DHT11_DATA)&&Overtime_counter++); Delay_10us(); //26-28us的低电平判断门限 Delay_10us(); bit_value=0; //跳过门限后判断总线是高还是低，高为1，低为0 if(DHT11_DATA) bit_value=1; Overtime_counter=2; while((DHT11_DATA)&&Overtime_counter++); if(Overtime_counter==1) break; //超时则跳出for循环 comdata<<=1; //左移1位，LSB补0 comdata|=bit_value; //LSB赋值 } } /*****************DHT11读取五个字节函数******************/ void Read_DHT11(void) { uchar checksum; DHT11_DATA=0; //主机拉低18ms Delay_100us(180); DHT11_DATA=1; //总线由上拉电阻拉高 主机延时20us-40us Delay_10us(); Delay_10us(); Delay_10us(); Delay_10us(); DHT11_DATA=1; //主机转为输入或者输出高电平，DATA线由上拉电阻拉高，准备判断DHT11的响应信号 if(!DHT11_DATA) //判断从机是否有低电平响应信号 如不响应则跳出，响应则向下运行 { Overtime_counter=2; //判断DHT11发出的80us的低电平响应信号是否结束 while((!DHT11_DATA)&&Overtime_counter++); Overtime_counter=2; //判断DHT11是否发出80us的高电平，如发出则进入数据接收状态 while((DHT11_DATA)&&Overtime_counter++); Read_Byte(); //读取湿度值整数部分的高8bit RH_data_H_temp=comdata; Read_Byte(); //读取湿度值小数部分的低8bit RH_data_L_temp=comdata; Read_Byte(); //读取温度值整数部分的高8bit T_data_H_temp=comdata; Read_Byte(); //读取温度值小数部分的低8bit T_data_L_temp=comdata; Read_Byte(); //读取校验和的8bit checkdata_temp=comdata; DHT11_DATA=1;//读完数据将总线拉高 checksum=(T_data_H_temp + T_data_L_temp + RH_data_H_temp + RH_data_L_temp);//进行数据校验 if(checksum==checkdata_temp) { RH_data_H = RH_data_H_temp; RH_data_L = RH_data_L_temp; T_data_H = T_da