[讨论] 28035 ADC采样不准

357982292 2016-6-21 15:03 楼主

28035 ADC软件触发采样不准是什么问题，采0V---ADC也有0~0.1V的变化。？？？？？？？？

InitAdc(); //
EALLOW;
// AdcRegs.ADCCTL1.bit.TEMPCONV = 1;
AdcRegs.ADCCTL1.bit.INTPULSEPOS = 1; // //当转换结果存入结果寄存器时再开启ADC中断
//ADCSOCxCTL x可设置0--15，CHSEL 选择AD输入通道
AdcRegs.ADCSOC0CTL.bit.CHSEL    = 0; //set SOC0 channel select to ADCINA0       选择AD通道
AdcRegs.ADCSOC0CTL.bit.TRIGSEL = 1; //set SOC0 start trigger on software only 选择AD触发方式
AdcRegs.ADCSOC0CTL.bit.ACQPS    = 6; //set SOC0 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)  配置转换时间

AdcRegs.ADCSOC1CTL.bit.CHSEL    = 0; //set SOC0 channel select to ADCINA0       选择AD通道
AdcRegs.ADCSOC1CTL.bit.TRIGSEL = 1; //set SOC0 start trigger on software only 选择AD触发方式
AdcRegs.ADCSOC1CTL.bit.ACQPS    = 6; //set SOC0 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)

AdcRegs.INTSEL1N2.bit.INT1SEL = 1; //setup EOC0 to trigger ADCINT1 to fire；
AdcRegs.INTSEL1N2.bit.INT1E    = 1; //Enabled ADCINT1;使能中断；
AdcRegs.INTSEL1N2.bit.INT1CONT  = 0; //禁止中断连续模式；

AdcRegs.ADCINTSOCSEL1.bit.SOC0  = 1; //ADCINT1 will trigger SOC0. TRIGSEL field is ignored.
AdcRegs.ADCINTSOCSEL1.bit.SOC1  = 1; //ADCINT1 will trigger SOC0. TRIGSEL field is ignored.

    EDIS;

   for(;;) //
{
     AdcRegs.ADCSOCFRC1.all = 0x0F;
      while (AdcRegs.ADCINTFLG.bit.ADCINT1== 0) ;
      AdcRegs.ADCSOCFRC1.all = 0x00;
      AdcRegs.ADCINTFLGCLR.bit.ADCINT1 = 1;

      SampleTable[0] =AdcResult.ADCRESULT1 ;

   USART_Transmit(SampleTable[0]>>8);
   USART_Transmit(SampleTable[0]&0xff);

      Delay_nMS(100);
      GpioDataRegs.GPBTOGGLE.bit.GPIO43 = 1; // GPIO40端口电平翻转一次

}