ADC最大采样数设置问题

只看该作者 · 2014-10-10 21:09

AdcRegs.ADCMAXCONV.bit.MAX_CONV1 = 0x7; // convert and store in 8 results registers
AdcRegs.ADCMAXCONV.bit.MAX_CONV2 = 0x3;
本人新手，求高手解答为什么这样编写语句第二条语句会无效呢？？？

只看该作者 · 2014-10-10 21:10

自己顶顶

只看该作者 · 2014-10-10 21:10

只看该作者 · 2014-10-10 21:58

？？？？？？？

2万 · 2014-10-12 09:57

这属于两个寄存器两句分别赋值
无效是什么意思你看看别的地方有没有对AdcRegs.ADCMAXCONV.bit.MAX_CONV2
进行修改或对要实现的功能的限制

只看该作者 · 2014-10-13 17:44

的确是无效，第一条已经设置最大转换通道数为8了

只看该作者 · 2014-10-13 20:13

支持楼上的

只看该作者 · 2014-10-13 20:45

不太懂帮忙顶了

只看该作者 · 2014-10-13 22:09

zhangmangui 发表于 2014-10-12 09:57
这属于两个寄存器两句分别赋值
无效是什么意思你看看别的地方有没有对AdcRegs.ADCMAXCONV.bit.MAX_ ...

  谢谢回复，问题已解决。下面是程序设置

AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK;  // Sequential mode: Sample rate = 1/[(2+ACQ_PS)*ADC clock in ns]
                     //                   = 1/(3*40ns) =8.3MHz (for 150 MHz SYSCLKOUT)
      //                   = 1/(3*80ns) =4.17MHz (for 100 MHz SYSCLKOUT)
      // If Simultaneous mode enabled: Sample rate = 1/[(3+ACQ_PS)*ADC clock in ns]
AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS;
// AdcRegs.ADCTRL1.bit.SEQ_CASC = 1;       // 1  Cascaded mode
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0;
// AdcRegs.ADCTRL1.bit.CONT_RUN = 1;    // Setup continuous

// AdcRegs.ADCTRL1.bit.SEQ_OVRD = 1;    // Enable Sequencer override feature
AdcRegs.ADCCHSELSEQ1.all = 0x0;       // Initialize all ADC channel selects to A0
AdcRegs.ADCCHSELSEQ2.all = 0x0;
AdcRegs.ADCCHSELSEQ3.all = 0x0;
AdcRegs.ADCCHSELSEQ4.all = 0x0;
AdcRegs.ADCMAXCONV.bit.MAX_CONV1 = 0x3;
AdcRegs.ADCMAXCONV.bit.MAX_CONV2 = 0x3;

// Step 5. User specific code, enable interrupts:

// Clear SampleTable
for (i=0; i<BUF_SIZE; i++)
{
   SampleTable = 0;
}

// Start SEQ1
AdcRegs.ADCTRL2.all = 0x2000;//软件触发SOC
//    AdcRegs.ADCTRL2.all = 0x0020;
for(;;)
{  // Take ADC data and log them in SampleTable array

   // Initalize the array index.  This points to the current
   // location within the SampleTable
   array_index = 0;

   for (i=0; i<(BUF_SIZE/16); i++)
   {
   // Wait for int1
   while (AdcRegs.ADCST.bit.INT_SEQ1== 0){}
//    while (AdcRegs.ADCST.bit.INT_SEQ1== 1){}
   GpioDataRegs.GPBSET.bit.GPIO34 = 1;  // Set GPIO34 for monitoring  -optional

   AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;

#if INLINE_SHIFT
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT0)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT1)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT2)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT3)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT4)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT5)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT6)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT7)>>4);

#endif //-- INLINE_SHIFT

#if NO_SHIFT || POST_SHIFT

         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT0));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT1));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT2));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT3));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT4));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT5));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT6));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT7));

#endif //-- NO_SHIFT || POST_SHIFT
AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1;

   AdcRegs.ADCTRL2.all = 0x0020;//软件触发

   while (AdcRegs.ADCST.bit.INT_SEQ2== 0){}
//          while (AdcRegs.ADCST.bit.INT_SEQ1== 1){}
   GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1;  // Clear GPIO34 for monitoring  -optional
   AdcRegs.ADCST.bit.INT_SEQ2_CLR = 1;

#if INLINE_SHIFT

         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT8)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT9)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT10)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT11)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT12)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT13)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT14)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT15)>>4);

#endif //-- INLINE_SHIFT

#if NO_SHIFT || POST_SHIFT

         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT8));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT9));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT10));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT11));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT12));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT13));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT14));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT15));
#endif // -- NO_SHIFT || POST_SHIFT

}

#if POST_SHIFT
      // For post shifting, shift the ADC results
      // in the SampleTable buffer after the buffer is full.
      for (i=0; i<BUF_SIZE; i++)
      {
      SampleTable = ((SampleTable) >>4);
      }
#endif // -- POST_SHIFT
   AdcRegs.ADCTRL2.bit.RST_SEQ2 = 1;  ////////////////////////////////////////////////////////////////////
      GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1;  // Clear GPIO34 for monitoring  -optional
  }

只看该作者 · 2014-10-13 22:10

edishen 发表于 2014-10-13 20:45
不太懂帮忙顶了

谢谢

只看该作者 · 2014-10-13 22:10

小木欧尼发表于 2014-10-13 20:13
支持楼上的

这个可以有效，测试成功。
  谢谢回复，问题已解决。下面是程序设置

AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK;  // Sequential mode: Sample rate = 1/[(2+ACQ_PS)*ADC clock in ns]
                     //                   = 1/(3*40ns) =8.3MHz (for 150 MHz SYSCLKOUT)
      //                   = 1/(3*80ns) =4.17MHz (for 100 MHz SYSCLKOUT)
      // If Simultaneous mode enabled: Sample rate = 1/[(3+ACQ_PS)*ADC clock in ns]
AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS;
// AdcRegs.ADCTRL1.bit.SEQ_CASC = 1;       // 1  Cascaded mode
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0;
// AdcRegs.ADCTRL1.bit.CONT_RUN = 1;    // Setup continuous

// AdcRegs.ADCTRL1.bit.SEQ_OVRD = 1;    // Enable Sequencer override feature
AdcRegs.ADCCHSELSEQ1.all = 0x0;       // Initialize all ADC channel selects to A0
AdcRegs.ADCCHSELSEQ2.all = 0x0;
AdcRegs.ADCCHSELSEQ3.all = 0x0;
AdcRegs.ADCCHSELSEQ4.all = 0x0;
AdcRegs.ADCMAXCONV.bit.MAX_CONV1 = 0x3;
AdcRegs.ADCMAXCONV.bit.MAX_CONV2 = 0x3;

// Step 5. User specific code, enable interrupts:

// Clear SampleTable
for (i=0; i<BUF_SIZE; i++)
{
   SampleTable = 0;
}

// Start SEQ1
AdcRegs.ADCTRL2.all = 0x2000;//软件触发SOC
//    AdcRegs.ADCTRL2.all = 0x0020;
for(;;)
{  // Take ADC data and log them in SampleTable array

   // Initalize the array index.  This points to the current
   // location within the SampleTable
   array_index = 0;

   for (i=0; i<(BUF_SIZE/16); i++)
   {
   // Wait for int1
   while (AdcRegs.ADCST.bit.INT_SEQ1== 0){}
//    while (AdcRegs.ADCST.bit.INT_SEQ1== 1){}
   GpioDataRegs.GPBSET.bit.GPIO34 = 1;  // Set GPIO34 for monitoring  -optional

   AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;

#if INLINE_SHIFT
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT0)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT1)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT2)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT3)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT4)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT5)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT6)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT7)>>4);

#endif //-- INLINE_SHIFT

#if NO_SHIFT || POST_SHIFT

         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT0));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT1));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT2));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT3));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT4));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT5));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT6));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT7));

#endif //-- NO_SHIFT || POST_SHIFT
AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1;

   AdcRegs.ADCTRL2.all = 0x0020;//软件触发

   while (AdcRegs.ADCST.bit.INT_SEQ2== 0){}
//          while (AdcRegs.ADCST.bit.INT_SEQ1== 1){}
   GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1;  // Clear GPIO34 for monitoring  -optional
   AdcRegs.ADCST.bit.INT_SEQ2_CLR = 1;

#if INLINE_SHIFT

         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT8)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT9)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT10)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT11)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT12)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT13)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT14)>>4);
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT15)>>4);

#endif //-- INLINE_SHIFT

#if NO_SHIFT || POST_SHIFT

         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT8));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT9));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT10));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT11));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT12));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT13));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT14));
         SampleTable[array_index++]= ( (AdcRegs.ADCRESULT15));
#endif // -- NO_SHIFT || POST_SHIFT

}

#if POST_SHIFT
      // For post shifting, shift the ADC results
      // in the SampleTable buffer after the buffer is full.
      for (i=0; i<BUF_SIZE; i++)
      {
      SampleTable = ((SampleTable) >>4);
      }
#endif // -- POST_SHIFT
   AdcRegs.ADCTRL2.bit.RST_SEQ2 = 1;  ////////////////////////////////////////////////////////////////////
      GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1;  // Clear GPIO34 for monitoring  -optional
  }

只看该作者 · 2014-10-13 22:11

scottly 发表于 2014-10-13 17:44
的确是无效，第一条已经设置最大转换通道数为8了

高位可以忽略的，在非级联模式。

2万 · 2014-10-13 22:11

824653578 发表于 2014-10-13 22:09
谢谢回复，问题已解决。下面是程序设置

AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK; // Sequential mo ...

感谢你的反馈和代码分享

只看该作者 · 2014-10-23 18:51

824653578 发表于 2014-10-13 22:10
这个可以有效，测试成功。
谢谢回复，问题已解决。下面是程序设置

楼主真给力一起进步啦

ADC最大采样数设置问题

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