dsp28335芯片 adc中断方式采样代码

以下是基于DSP28335芯片的ADC中断方式采样代码示例：

#include "DSP2833x_Device.h"
#include "DSP2833x_Examples.h"
#include "DSP2833x_GlobalPrototypes.h"

Uint16 AdcBuf[8];
volatile Uint16 SampleFlag;

interrupt void AdcIsr(void)
{
    AdcBuf[0] = AdcResult.ADCRESULT0;
    AdcBuf[1] = AdcResult.ADCRESULT1;
    AdcBuf[2] = AdcResult.ADCRESULT2;
    AdcBuf[3] = AdcResult.ADCRESULT3;
    AdcBuf[4] = AdcResult.ADCRESULT4;
    AdcBuf[5] = AdcResult.ADCRESULT5;
    AdcBuf[6] = AdcResult.ADCRESULT6;
    AdcBuf[7] = AdcResult.ADCRESULT7;
    SampleFlag = 1;
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

void AdcInit(void)
{
    EALLOW;
    SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 1;
    AdcRegs.ADCTRL1.bit.RESET = 1;
    AdcRegs.ADCTRL1.bit.SUSMOD = 3;
    AdcRegs.ADCTRL1.bit.ACQ_PS = 9;
    AdcRegs.ADCTRL1.bit.CPS = 1;
    AdcRegs.ADCTRL3.bit.ADCBGRFDN = 0;
    AdcRegs.ADCTRL3.bit.ADCPWDN = 1;
    AdcRegs.ADCTRL3.bit.ADCCLKPS = 7;
    AdcRegs.ADCTRL3.bit.SMODE_SEL = 1;
    AdcRegs.ADCMAXCONV.bit.MAX_CONV1 = 7;
    AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0;
    AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 1;
    AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 2;
    AdcRegs.ADCCHSELSEQ1.bit.CONV03 = 3;
    AdcRegs.ADCCHSELSEQ2.bit.CONV04 = 4;
    AdcRegs.ADCCHSELSEQ2.bit.CONV05 = 5;
    AdcRegs.ADCCHSELSEQ2.bit.CONV06 = 6;
    AdcRegs.ADCCHSELSEQ2.bit.CONV07 = 7;
    AdcRegs.ADCTRL1.bit.INTPULSEPOS = 1;
    PieVectTable.ADCINT1 = &AdcIsr;
    IER |= M_INT1;
    PieCtrlRegs.PIEIER1.bit.INTx1 = 1;
    AdcRegs.ADCTRL1.bit.ADCENABLE = 1;
    EDIS;
}

void main(void)
{
    InitSysCtrl();
    EINT;
    InitPieCtrl();
    InitPieVectTable();
    AdcInit();
    for (;;) {
        while (SampleFlag == 0)
            ;
        SampleFlag = 0;
        // 此处可进行数据处理
    }
}

在这个例子中，我们使用了ADC中断来采样8个通道的数据，并将其存储在AdcBuf数组中。每次ADC中断被触发，SampleFlag标志会被设置为1，然后在主循环中进行数据处理。注意，在AdcInit函数中需要配置ADC的各项参数，使其符合实际需求。