新唐PWM问题请教

只看该作者 · 2014-8-12 11:32

初用新唐，写了一个PWM程序输出不成功，请高手指教

#include <W79E2051_4051.H>
#define uchar unsigned char
#define uint  unsigned int
void sysinit(void);
void PWM(void);

uint PWM_Period=100;
uint pwm_duty;
uint counter ;

void main(void)
{
      sysinit();
      P35=1;
      while(1)
      {
               P34=1;
               P16=0;
               PWM();
      }

}

void sysinit(void)
{
      P1M1=0x03;                                     //P1.0 P1.1

      P1=0xF3;
      P3=0xa1;

      PWMCON3=0x10;                                                             //
      PWMCON1=0xD1;
      EA=1;

}
void PWM(void)
{
      PWMPL=PWM_Period;
      PWMPH=PWM_Period>>8;
      pwm_duty=50;
      PWM0L=pwm_duty;
      PWM0H=pwm_duty>>8;
}