已经会写pwm波的程序,就是如何将这个pwm波给到直流电机上,从而控制它的转速呢?(在单片机开发板上)。程序上还要怎么写才能控制呢?
#include<reg52.h>
unsigned int a, b; //------------------------------------------
void main()
{ TMOD = 0x01; //T0定时方式1
TH0 = (65536-50000) / 256; //50ms@12MHz TL0 = (65536-50000) % 256;
TR0 = 1; ET0 = 1; EX0 = 1; EX1 = 1;
IT0 = 1; IT1 = 1; EA = 1; a = 0; b = 10;
while(1); } //------------------------------------------
void time0() interrupt 1 {
TL0 = (65536-50000) % 256;
TH0 = (65536-50000) / 256; //50ms@12MHz a++;
if(a == 20) a = 0; //在这里调整周期.
if(a < b) P2 = 0xff; //在这里调整占空比.
else P2 = 0x00;
P0 = ((b / 10) << 4) + b % 10; //显示占空比等级 } //------------------------------------------
void X0_INT() interrupt 0 { b++; if(b > 19) b = 19; //占空比等级最大为19 } //------------------------------------------ void X1_INT() interrupt 2 { b--; if(b < 1) b = 1; //占空比等级最小为1. } |