分享msp430g2553呼吸灯程序编程实例

Jacktang · 发表于2015-11-29 22:04

分享msp430g2553呼吸灯程序编程实例 [复制链接]

#include
void BreathLED()
{

      P1SEL =BIT6;
      P1DIR = BIT6;
      P1OUT=0;
      TACTL = TASSEL_1 + MC_1  ;
      TACCTL1 =  OUTMOD_3 ;
      TACCTL0 = CCIE;
      CCR0 =12000;
      CCR1 =327;       //0% pwm

      TACTL |=TACLR;
      _EINT();
}

int main( void )
{
  // Stop watchdog timer to prevent time out reset
  WDTCTL = WDTPW + WDTHOLD;
  BCSCTL3 |= LFXT1S_2; // Set LFXT1为vol时钟即12kHZ
  BreathLED();
  LPM0;
  return 0;
}
#pragma vector=TIMER0_A0_VECTOR
__interrupt void CountTimes()
{
      static int Times;
      Times++;
      switch(Times)
      {
      case 20:
            CCR1=294;
            break;
      case 30:
            CCR1=277;
            break;
      case 40:
            CCR1=262; //20% PWM
            break;
      case 50:
            CCR1=245; //20% PWM
            break;
      case 60:
            CCR1=228; //40% PWM
            break;
      case 80:
            CCR1=196; //40% PWM
            break;
      case 100:
            CCR1=163;
            break;
      case 120:
            CCR1=131; //60% PWM
            break;
      case 140:
            CCR1=98; //60% PWM
            break;
      case 160:
            CCR1=65; //80% PWM
            break;
      case 180:
            CCR1=32; //80% PWM
            break;
      case 200:
            CCR1=1;    //100% PWM
            break;
      case 220:
            CCR1=32; //80% PWM
            break;
      case 240:
            CCR1=65;
            break;
      case 260:
            CCR1=98; //60% PWM
            break;
      case 280:
            CCR1=131;
            break;
      case 300:
            CCR1=163;
            break;
      case 320:
            CCR1=196;
            break;
      case 340:
            CCR1=228; //40% PWM
            break;
      case 350:
            CCR1=245; //40% PWM
            break;
      case 360:
            CCR1=262;
            break;
      case 370:
            CCR1=277;
            break;
      case 380:
            CCR1=294;
            break;
      case 390:
            CCR1=310;
            break;
      case 400:
            {
            CCR1=327;
            Times=0;
            }
            break;
      default:
            break;
      }
}