电子设计与单片机应用实训教程代码第十二章.pdf

1:简单的单向电动机控制(单片机):

#includereg52.h//头文件

sbitIN1=P2^3;//电动机控制口为P2^3

intnum=0;

voidInit();

intmain()

{

Init();

while(1)

}

voidInit()//定时器初始化函数

{

TMOD=0x01;//定时器0以模式1工作

THO=(65536-100)/256;

TLO=(65536-100)%6;

EA=1;

ETO=1;

TRO=1;

}

voidTimer_0(void)interrupt1

THO=(65536-100)/256;

TLO=(65536-100)%6;

num++;

if(num=10)//占空比的设定，此处为50%

IN1=1;

else

IN1=0;

if(num20)//周期

num=0;

}

2:控制电动机的正/反转(单片机):

#includereg52.h

#defineucharunsignedchar

#defineuintunsignedint

sbitA1=P2^4;

sbitA2=P2^5;

sbitB1=P2^6;

sbitB2=P2^7;

uintus_1X=0,PWM_jsa=0,PWM_jsb=0;

voidTO_time()interrupt1

{

THO=(65536-1)/256;//1us加一次

TLO=(65536-1)%6;//2KHz

us_1X++;

if(us_1X500)//定时器清空，重新开始

us_1X=0;

}

ucharcodetable1[]=//数码管显示

0x3f,//0

0x06,0x5b,Ox4f,0x66,0x6d,//1-5

0x7d,0x07,0x7f,0x6f//6-9

};

voiddelay(ucharx)

{

uchari,j;

for(i=x;i0;i--)

for(j=110;j0;j-)

}

voidPWM_xs()

{

if(sd==0)

[

PWMbai=jsa/100

PWM_shi=jsa/10;

PWMge=jsa

}

if(sd==1)

{

PWM_bai=jsb/100;

PWM_shi=jsb/10;

PWMge=jsb

}

P1=0xfb;//数码管显示

PO=table1[PWM_bai];

delay(1);

P1=0xfd;

PO=table1[PWM_shi];

delay(1);

P1=0xfe;

PO=table1[PWM_ge];

delay(1);

}

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