2407的程序,用定时器怎么不出来PWM呢?让PWM9有PWM.大家来看看吧

只看该作者 · 2007-8-21 13:38

void T3init()
{ *EVBIMRA=*EVBIMRA|0X0080;//init
  *EVBIFRA=*EVBIFRA&0X0080;
  *T3CON = 0x1040;  // 定时器3为连续增计数模式
  *T3PER = 0x0820;//设置定时器3的周期寄存器，并设置CMPR4~CMPR6，
  *CMPR5 = 0x00C0; //*CMPR5 = 0x0010;//pwm9,10  1:1
  *CMPR6 = 0x00C0; //*CMPR6 = 0x0010;//pwm11,12 1:1
  *T3CNT=0X00;//计数器清0


*GPTCONB=0XF04A;
//*T3CMPR=1000;

  *ACTRB=0x0000;
  *DBTCONB=0;           //不使能死区控制
  *COMCONB = 0x8200;
}

void interrupt T3INT()
{
*EVBIFRA=*EVBIFRA&0X0080;

flag=*EVBIFRA&0X0080;

*T3CNT=0X00;//计数器清0
*EVBIFRA=*EVBIFRA&0X0080;
asm (" clrc INTM");
return;
}

..........
void do()
{        *CMPR5 = 0x00C0;
            while (flag!=0X0080){ }
           *T3CON=0x1000;
           *T3PER = 0x820;
           *ACTRB=0x0010;//  9di

           *T3CON=0x1040;
             *T3CNT=0X00;//计数器清0
             *EVBIFRA=*EVBIFRA&0X0080;
    }