STC12C5A60S2的PWM测试程序

#include <REG51.H> #include <stc_pwm.H> sbit key_u=P3^2; sbit key_d=P3^3; bit f_u=1,f_d=1; void pwm_init() { CMOD=2; CCAP0H =(CCAP0L = 0x7f); CCAPM0=0x42; CCAP1H =(CCAP1L = 0x7f); CCAPM1=0x42; CCON=0x40; } void delay(void); main() { pwm_init(); while(1){ if(key_u!=f_u) { if(key_u){CCAP1L=CCAP1L+10;CCAP1H =CCAP1L;} f_u=key_u; } if(key_d!=f_d) { if(key_d){CCAP1L=CCAP1L-10;CCAP1H =CCAP1L;} f_d=key_d; } delay(); } } void delay(void) //100ms { unsigned char a,b,c; for(c=65;c>0;c--) for(b=104;b>0;b--) for(a=176;a>0;a--); }