pwm.rar_PWM software_单片机pwm

#include <STC12C5A60S2.h> #define uchar unsigned char #define uint unsigned int sbit wr=P3^6; void choose(bit gate,uchar which) { if(gate) wr=0; else wr=1; switch(which) { case 4:P2=0x80;break; case 5:P2=0xa0;break; case 6:P2=0xc0;break; case 7:P2=0xe0;break; default: break; } } void PWM_init() { CMOD=0X84; CCON=0X00; CCAP0H=0x00; CCAP0L=0x00; CCAPM0=0X42; CL=0;CH=0; PCA_PWM0=0X00; CCAP1H=0x80; CCAP1L=0x80; CCAPM1=0X42; } void main() { choose(1,5); //屏蔽蜂鸣器、继电器 P0=0x00; choose(0,5); choose(1,4); //屏蔽led P0=0xff; choose(0,4); choose(1,7); //屏蔽数码管 P0=0xff; choose(0,7); choose(1,6); P0=0x00; choose(0,6); PWM_init(); CR=1; while(1); }