求大神帮助，不同电压转换成不同频率pwm问题

[复制链接]

1118|0

手机看帖

扫描二维码
随时随地手机跟帖

电梯直达

楼主

sunpenglie08| 实习生

楼主 | 2014-7-28 11:18 | 只看该作者回帖奖励

|倒序浏览 |阅读模式

频率PWM, 电压转换, dc, AD, ADC1

模拟量输入 p1.0/a0
输出pwm  p2.0/ta1.0
参考电压  p1.4
写的一段程序  但是检测不到pwm输出  求大神指点
#include "MSP430G2553.h"

const unsigned int table[1024]={电压值对应不同的周期
};
int main( void )
{
  // Stop watchdog timer to prevent time out reset
  WDTCTL = WDTPW + WDTHOLD;
  ADC10CTL1 = CONSEQ_2+ADC10SSEL_2; // TA0 trigger
  ADC10CTL0 = ADC10SHT_2 + MSC + ADC10ON + ADC10IE + SREF_2 ;
  ADC10DTC1 = 0x01;

  ADC10AE0 |= 0x01;
  ADC10CTL0 |=ENC+ADC10SC;
  while(1)
  {
  ADC10CTL0 &= ~ENC;
while (ADC10CTL1 & BUSY);             // Wait if ADC10 core is active
ADC10SA = 0x200;

  TACTL |= TASSEL1+TACLR;
  TACCR0=table[ *(int *)0x200];
  TACCTL1=OUTMOD_7;
  TACCR1= table[ *(int *)0x200]/2;
  P2DIR |= 0x01;
  P2SEL |= 0x01;
  TACTL |=MC_1;

ADC10CTL0 |= ENC;                      // Sampling and conversion ready
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3, enable interrupts
                           // Toggle P1.0 using exclusive-OR
  }

}

// ADC10 interrupt service routine
#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR(void)
{
  __bic_SR_register_on_exit(LPM3_bits);    // Clear LPM3 bits from 0(SR)
}

使用特权