PWM.rar_pwm中断_简单的pwm程序

#include"reg52.h" #define uint unsigned int #define uchar unsigned char void int1(); sbit pwm1=P2^0; sbit pwm2=P2^1; sbit pwm3=P2^2; sbit pwm4=P2^3; uint pwmk1=0,pwmk2=0,pwmk3=0,pwmk4=0; void int1() { pwm1=0; pwm2=0; pwm3=0; pwm4=0; TMOD=0x02; EA=1; ET0=1; TR0=1; TL0=(65535-200)%256; TH0=(65535-200)/256; } main() { int1(); while(1) { if(pwmk1==2500) { pwmk1=0; pwm1=~pwm1; } if(pwmk2==1000) { pwmk2=0; pwm2=~pwm2; } if(pwmk3==500) { pwmk3=0; pwm3=~pwm3; } if(pwmk4==100) { pwmk4=0; pwm4=~pwm4; } } } void t_0() interrupt 1 { TL0=(65535-200)%256; TH0=(65535-200)/256; pwmk1++; pwmk2++; pwmk3++; pwmk4++; }