用單片機定時器模擬PWM10KHZ的方波控制直流電機的程序編寫

#define?uchar?unsigned?char

uchar?pwm=50,num;

sbit?pluse=P1^0;

void?t0isr()?interrupt?1

{

num++;

num%=10;

if(num<pwm/10)pluse=1;

else?pluse=0;

}

main()

{

TMOD=0x02;

TH0=246;

TL0=246;

TR0=1;

ET0=1;

EA=1;

while(1);

}