实验十六 基于单片机的风扇控制器模拟(综合实验).doc

实验十六 风扇控制器模拟(综合实验)一、实验目的1. 掌握PROTEUS ISIS软件仿真单片机原理的方法2. 温度传感器DS18B20、PWM实验方法等的综合运用，控制电机转速二、实验内容基于单片机的温控风扇系统，采用单片机作为控制器，利用温度传感器DS18B20作为温度采集元件，并根据采集到的温度，通过一个达林顿反向驱动器ULN2803驱动风扇电机。根据检测到的温度与系统设定的温度的比较实现风扇电机的自动启动和停止，并能根温度的变化自动改变风扇电机的转速，同时用LED八段数码管显示检测到的温度与设定的温度。三、实验电路图16.1 电路原理图打开Proteus ISIS编辑环境，按表16.1所列元件清单添加元件。表16.1元件清单元件清单所属类所属子类AT89C52Microprocessor ICs8051 FamilyULN2803AnalogMiscellaneousDS18B20Data ConvertersTemperature SensorsMOTOR-DCElectromechanical7SEG-MPX6-CCOptoelectronics7-Segment DisplaysCAPCapacitorsGenericCAP.ELECCapacitorsGenericCRYSTALMiscellaneous.RESResistorsGenericBUTTONSwitches&RelaysSwitchesRESPACK-8ResistorsResistor Packs元件全部添加完后，在Proteus ISIS编辑环境中按图16.1所示连接硬件原理图。四、实验程序#include #define uchar unsigned char#define uint unsigned intsbit DQ=P17;sbit key1=P13;sbit key2=P14;sbit dianji=P31;float ff;uint y3;uchar shi,ge,xiaoshu,sheding=20,gaonum,dinum;uchar code dispcode= /段码0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71;uchar code table= /带小数点的段码0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef;uchar dispbitcode= /位选0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f;uchar dispbuf8=0,0,0,0,0,0,0,0;void Delay (uint num)/ 延时函数 while (-num);void digitalshow(uchar a4,uchar a3,uchar a2,uchar a1,uchar a0) dispbuf0=a0;dispbuf1=a1;dispbuf2=a2;dispbuf3=a3;dispbuf4=a4;P2=0xff;P0=dispcodedispbuf0;P2=dispbitcode5;Delay(1);P2=0xff;P0=dispcodedispbuf1;P2=dispbitcode4;Delay(1); P2=0xff;P0=dispcodedispbuf2;P2=dispbitcode2;Delay(1);P2=0xff;P0=tabledispbuf3;P2=dispbitcode1;Delay(1);P2=0xff;P0=dispcodedispbuf4;P2=dispbitcode0;Delay(1);void dmsec(uint count) uint i; /1ms延时while(count-) for(i=0;i125;i+)void tmreset(void) DQ=0; Delay(90); /精确延时 大于480us DQ=1; Delay(4); /90,4 可以小范围变化void tmpre(void) while(DQ);while(DQ);Delay(4);bit tmrbit(void) uint i;bit dat;DQ=0;i+; /i+；大概1usDQ=1;i+;i+;dat=DQ;Delay(8);return(dat);uchar tmrbyte(void) /读一个比特 uchar i,j,dat;dat=0;for(i=1;i=8;i+) j=tmrbit();dat=(j1);return(dat);void tmwbyte(uchar dat) /写一个比特 uint i;uchar j;bit testb;for(j=1;j1; /从低位开始if(testb) /Write 1 DQ=0; /先拉低i+;i+; /1usDQ=1;Delay(4);else /Write 0 DQ=0;Delay(4);DQ=1;i+;i+; /再拉高void tmstart(void) /DS18B20开始转换 dmsec(1);tmreset();tmpre();dmsec(1);tmwbyte(0xcc); /skip romtmwbyte(0x44); /转换uchar tmrtemp(void) /读取温度 uchar a,b;tmreset();tmpre();dmsec(1);tmwbyte(0xcc); /skip romtmwbyte(0xbe); /转换a=tmrbyte(); /MSB高8位b=tmrbyte();y3=b;y3=y3|a;ff=y3*0.0625;y3=ff*10+0.5;return(y3);void keyscan(void) if(key1=0) dmsec(5);if(key1=0) sheding+;if(sheding=100)sheding=20;while(!key1);else if(key2=0) dmsec(5);if(key2=0) sheding-;if(sheding=0) sheding=20;while(!key2);void deal(uint tmp) /温度处理 if(tmpsheding)&(tmp(sheding+5)&(tmp(sheding+10)&(tmp=(sheding+15) gaonum=3;dinum=1;else gaonum=4; dinum=0;void dianjik() /电机控制 uchar q,i;for(q=0;q0;i-) digitalshow(shi,ge,xiaoshu,sheding/10,sheding%10);for(q=0;q0;i-) digitalshow(shi,ge,xiaoshu,sheding/10,sheding%10); void main(void) uint last;dianji=0;tmstart();dmsec(450); /初始化DS18B20while(1) tmstart();/DS18B20开始转换dmsec(2);last=tmrtemp()+