CC430F5137 PWM占空比调节问题

e_tang lin

Other Parts Discussed in Thread: CC430F5137

想通过CC430F5137自身的TA0定时器的CCR1、CCR2、CCR3进行输出3路占空比可调的PWM，同时将3路PWM信号通过IO口映射到P3.0、P3.1、P3.2的IO口具体代码如下：

uint8_t IintPWM(void)//PWM参数设置
{

WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
   PMAPPWD = 0x02D52;                        // Get write-access to port mapping regs
   //P3MAP0 = PM_TA0CCR0A;                       // Map CBOUT output to P1.6
   P3MAP0 = PM_TA0CCR1A;
   P3MAP1 = PM_TA0CCR2A;
   P3MAP2 = PM_TA0CCR3A;
// P3MAP3 = PM_NONE;
   P3MAP7 = PM_NONE;
   PMAPPWD = 0;

   // Setup Port Pins
   P3DIR |= BIT0+BIT1+BIT2;      // P2.0,2,4,6,7 output
   P3SEL |= BIT0+BIT1+BIT2;        // P2.0,2,4,6,7 Port Map functions
   // Setup TB0
   TA0CCTL0 = OUTMOD_4;                      // CCR1 toggle/set
   TA0CCR0 = 256;                            // PWM Period/2
   TA0CCTL1 = OUTMOD_6;                      // CCR1 toggle/set
   TA0CCR1 = 192;                            // CCR1 PWM duty cycle
   TA0CCTL2 = OUTMOD_6;                      // CCR2 toggle/set
   TA0CCR2 = 128;                            // CCR2 PWM duty cycle
   TA0CCTL3 = OUTMOD_6;                      // CCR3 toggle/set
   TA0CCR3 = 64;                             // CCR3 PWM duty cycle

    TA0CTL = TASSEL_2 + MC_3 + TACLR;         // SMCLK, up mode, clear TAR
   __bis_SR_register(LPM3_bits);         // Enter LPM3
   __no_operation();                         // For debugger
return 0;
}