#include "DSP281x_Device.h"
// DSP281x Headerfile Include File #include "DSP281x_Examples.h"
// DSP281x Examples Include File // Prototype statements for functions found within this file. interrupt void adc_isr(void); // Global variables used in this example: Uint16 LoopCount; Uint16 ConversionCount; Uint16 Voltage1[1024]; Uint16 Voltage2[1024]; main() { InitSysCtrl();
//初始化cpu
DINT;
//关中断
InitPieCtrl();
//初始化pie寄存器
IER = 0x0000;
//禁止所有的中断
IFR = 0x0000;
InitPieVectTable();//初始化pie中断向量表
// Interrupts that are used in this example are re-mapped to // ISR functions found within this file.
EALLOW;
// This is needed to write to EALLOW protected register PieVectTable.ADCINT = &adc_isr;
EDIS;
// This is needed to disable write to EALLOW protected registers
AdcRegs.ADCTRL1.bit.RESET = 1;
// Reset the ADC module
asm(" RPT #10 || NOP");
// Must wait 12-cycles (worst-case) for ADC reset to take effect
AdcRegs.ADCTRL3.all = 0x00C8;
// first power-up ref and bandgap circuits
AdcRegs.ADCTRL3.bit.ADCBGRFDN = 0x3;
// Power up bandgap/reference circuitry
AdcRegs.ADCTRL3.bit.ADCPWDN = 1;
// Power up rest of ADC // Enable ADCINT in PIE
PieCtrlRegs.PIEIER1.bit.INTx6 = 1;
IER |= M_INT1; // Enable CPU Interrupt 1
EINT;
// Enable Global interrupt INTM
ERTM;
// Enable Global realtime interrupt DBGM
LoopCount = 0;
ConversionCount = 0; // Configure ADC
AdcRegs.ADCMAXCONV.all = 0x0001;
// Setup 2 conv's on SEQ1
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; // Setup ADCINA3 as 1st SEQ1 conv.
AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x1; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCTRL2.bit.EVA_SOC_SEQ1 = 1;
// Enable EVASOC to start SEQ1
AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1;
// Enable SEQ1 interrupt (every EOS) // Configure EVA // Assumes EVA Clock is already enabled in InitSysCtrl();
EvaRegs.T1CMPR = 0x0080;
// Setup T1 compare value
EvaRegs.T1PR = 0x10;
// Setup period register
EvaRegs.GPTCONA.bit.T1TOADC = 1;
// Enable EVASOC in EVA
EvaRegs.T1CON.all = 0x1042;
// Enable timer 1 compare (upcount mode) // Wait for ADC interrupt
while(1)
{
LoopCount++;
} } interrupt void
adc_isr(void) {
Voltage1[ConversionCount] = AdcRegs.ADCRESULT0 >>4;
Voltage2[ConversionCount] = AdcRegs.ADCRESULT1 >>4;
// If 40 conversions have been logged, start over if(ConversionCount == 1023)
{
ConversionCount = 0;
}
else ConversionCount++;
// Reinitialize for next ADC sequence
AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1;
// Reset SEQ1
AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;
// Clear INT SEQ1 bit
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
// Acknowledge interrupt to PIE
return; }
| 
