28335用ADC的时候进不了中断是为什么？

只看该作者 · 2017-2-21 20:08

在while(1)循环里面进行采样可以，为什么到了中断里面就不行了，没有用EPWM.

程序#######

#include "DSP2833x_Device.h"    // DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h" // DSP2833x Examples Include File

// Determine when the shift to right justify the data takes place
// Only one of these should be defined as 1.
// The other two should be defined as 0.
#define POST_SHIFT 0  // Shift results after the entire sample table is full
#define INLINE_SHIFT 1  // Shift results as the data is taken from the results regsiter
#define NO_SHIFT    0  // Do not shift the results

// ADC start parameters
#if (CPU_FRQ_150MHZ)    // Default - 150 MHz SYSCLKOUT
  #define ADC_MODCLK 0x3 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 150/(2*3) = 25.0 MHz
#endif
#if (CPU_FRQ_100MHZ)
  #define ADC_MODCLK 0x2 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 100/(2*2) = 25.0 MHz
#endif
#define ADC_CKPS 0x0 // ADC module clock = HSPCLK/1    = 25.5MHz/(1) = 25.0 MHz
#define ADC_SHCLK  0x1 // S/H width in ADC module periods                = 2 ADC cycle
#define AVG       1000  // Average sample limit
#define ZOFFSET 0x00  // Average Zero offset
#define BUF_SIZE 512  // Sample buffer size

// Global variable for this example
double SampleTable[BUF_SIZE];
Uint16 voltage=0xff;
Uint16  array_index=0;
interrupt void ADCcaiyang(void);
void indexover();

main()
{
Uint16 i;
  // Uint16 voltage;

InitSysCtrl();

EALLOW;
SysCtrlRegs.HISPCP.all = ADC_MODCLK; // HSPCLK = SYSCLKOUT/ADC_MODCLK
EDIS;

/*
EALLOW;
GpioCtrlRegs.GPBMUX1.bit.GPIO34 = 0; // GPIO pin
GpioCtrlRegs.GPBDIR.bit.GPIO34 = 1;    // Output pin
EDIS;
*/

DINT;

InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;

InitPieVectTable();

InitAdc();       // For this example, init the ADC

EALLOW;             //定时器0的中断入口地址为中断向量表的INT0
    PieVectTable.ADCINT = & ADCcaiyang;
//PieVectTable.TINT0 = &ISRTimer0;
EDIS;

   IER |= M_INT1;
   PieCtrlRegs.PIEIER1.bit.INTx6 = 1;             //开启ADC中断通道

   EINT; // Enable Global interrupt INTM
   ERTM; // Enable Global realtime interrupt DBGM\

// Specific ADC setup for this example:
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 = 0x1; //select ADCINA1
AdcRegs.ADCTRL1.bit.CONT_RUN = 1;    // Setup continuous run

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 = 0x1;  // convert and store in 8 results registers
AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1; //enable interrupt
AdcRegs.ADCTRL2.bit.INT_MOD_SEQ1 = 0; //interrupt mode 0
AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1;

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

}

// Start SEQ1
AdcRegs.ADCTRL2.all = 0x2000;

while(1)
{
//array_index = 0;
//while(AdcRegs.ADCST.bit.INT_SEQ1 == 0);  //=0 no interrupt event happenes
//GpioDataRegs.GPBSET.bit.GPIO34 = 1;  // Set GPIO34 for monitoring  -optional
// AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;

//voltage = ((AdcRegs.ADCRESULT0)>>4);
//SampleTable[array_index++]= voltage*3.3/4095;
//if(array_index>(BUF_SIZE-1)) array_index=0;
indexover();
DELAY_US(100);
}
}

void indexover()
{
  if(array_index>(BUF_SIZE-1))
  {
array_index=0;
  }
}

interrupt void ADCcaiyang(void)
{
voltage = ((AdcRegs.ADCRESULT0)>>4);
SampleTable[array_index++]= voltage*3/4095;
AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1;
AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

28335用ADC的时候进不了中断是为什么？

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