定时器B的pwm例程

1万 · 2020-8-14 21:28

求一个定时器B的pwm例程

2万 · 2020-8-14 21:31

5529舵机的PWM信号控制的程序吗？

2万 · 2020-8-14 21:35

设定一个变量来选择初始占空比，然后通过Timer_B定时1s，每隔一秒

1万 · 2020-8-14 21:42

TB可以输出6路完整的PWM波形。

1万 · 2020-8-14 21:46

void main(void)
{

  WDTCTL = WDTPW + WDTHOLD; // Stop WDT

P1DIR |= 0x0C; // P1.2 and P1.3 output
P1SEL |= 0x0C; // P1.2 and P1.3 TA1/2 options

Init_TIMER_B();

TACTL = TASSEL_2 + TACLR; // SMCLK, up mode

CCR0 = 512-1; // PWM Period
CCTL1 = OUTMOD_7 ; // CCR1 reset/set
CCTL2 = OUTMOD_7 ; //CCR2 reset/set
if(v==5)
{
   CCR1 = 128; // CCR1 PWM duty cycle
   CCR2 = 384; // CCR2 PWM duty cycle
}
else if (v==12)
{
   CCR1 = 384; // CCR1 PWM duty cycle
   CCR2 = 128; // CCR2 PWM duty cycle
}
else
{
   CCR1 = 128; // CCR1 PWM duty cycle
   CCR2 = 384; // CCR2 PWM duty cycle
}

TACTL |= MC_1;    // Start Timer_A in up mode
TBCTL |= MC_1;    // Start Timer_B in up mode

_EINT();       //开全局中断
_BIS_SR(LPM0_bits); // Enter LPM0

}

void  Init_TIMER_B()
{
TBCTL |= TBSSEL0 +TBCLR; //ACLK
TBCCTL0 = CCIE;
TBCCR0 =32768;  //定时1s
}