MSP430G2553产生PWM的问题

sky-Hawk where · TA的每日心情 慵懒 2012-10-30 14:40

#include<msp430g2553.h>
#include<math.h>
#define pi 3.141592653
unsigned char step=0;
unsigned char spwm[100];
/***************************Creat PWM tab***************************/
void Creat_PWM_tab(void)
{
  unsigned char i;
  float x,y;
  for(i=0;i<100;i++)
  {
x = 20000*sin(pi*i/100);
y = 20000*sin(pi*(i+1)/100);
spwm[i]=(unsigned char)(x+y)/2;          //面积法求SPWM
  }
}
/****************************delay*******************************/
void delay(unsigned char a)
{
  unsigned char x,y;
  for(x=a;x>0;x--)
for(y=110;y>0;y--);
}

/******************************spwm init*************************/
void spwm_init(void)
{
  P1SEL |= BIT2;                // Output SPWM1 From P1.2
  P1DIR |= BIT2;
  P1SEL |= BIT6;                // Output SPWM2 From P1.6
  P1DIR |= BIT6;

  TA0CTL |= MC_3+TASSEL_2+ID_0;    //Up/down mode,SMCLK
  TA0CCTL1 |= OUTMOD_6;          //model 6
  TA0CCTL2 |= OUTMOD_2;          //model 2
  TA0CCR0 = 23330;
  TA0CCR1 = 10000;
  TA0CCR2 = 10000;
}
/********************************main****************************/
void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;    //stop watch dog timer
  Creat_PWM_tab();

  BCSCTL1 |= CALBC1_8MHZ_;       //MCLK = 8MHZ
  DCOCTL |= CALDCO_8MHZ_;       //Inner DCO = 8MHZ
  BCSCTL2 |= DIVS_3;          //SCLK = 1MHz
  spwm_init();

  _EINT();
  TA0CTL |= TAIE;
  TA0CCTL0 |= CCIE;
//  TA0CCTL1 |= CCIE;
//  TA0CCTL2 |= CCIE;
// LPM1;
  while(1);
}
/********************interrupt set spwm *************************/
/*
#pragma vector = TIMER1_A0_VECTOR
__interrupt void Set_SPWM(void)
{
  TA0CCR1 = spwm[step];
// TA0CCR2 = spwm[step];
  if(step<99) step++;
  else step=0;
}*/

上面是我的产生PWM的程序，但是引脚没有产生波形，真心求助, 望各位大牛指点！！！