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`main() { InitSysCtrl() EALLOW; #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 EDIS; EALLOW; SysCtrlRegs.HISPCP.all = ADC_MODCLK; EDIS; DINT; InitPieCtrl(); // Disable CPU interrupts and clear all CPU interrupt flags: IER = 0x0000; IFR = 0x0000; InitPieVectTable(); 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 InitAdc(); // For this example, init the ADC // Step 5. User specific code, enable interrupts: // 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.ADCTRL1.bit.CPS=1; //二分频 AdcRegs.ADCTRL3.bit.ADCCLKPS=1; //分频 ADCCLK=6MHz AdcRegs.ADCTRL1.bit.ACQ_PS=4; //采样时间宽度为5个ADCCLK AdcRegs.ADCTRL1.bit.SEQ_CASC=1; //级联模式 AdcRegs.ADCMAXCONV.all = 0x0001; // Setup 2 conv's on SEQ1 AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x2; // Setup ADCINA3 as 1st SEQ1 conv. AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x3; // Setup ADCINA2 as 2nd SEQ1 conv. AdcRegs.ADCTRL2.bit.EPWM_SOCA_SEQ1 = 1;// Enable SOCA from ePWM to start SEQ1 AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1; // Enable SEQ1 interrupt (every EOS) // Assumes ePWM1 clock is already enabled in InitSysCtrl(); EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group EPwm1Regs.ETSEL.bit.SOCASEL = 4; // Select SOC from from CPMA on upcount EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event EPwm1Regs.TBCTL.bit.HSPCLKDIV=1; EPwm1Regs.TBCTL.bit.CLKDIV=0; EPwm1Regs.CMPA.half.CMPA = EPwm1Regs.TBPRD /2; // Set compare A value EPwm1Regs.TBPRD = 49999; // Set period for ePWM1 EPwm1Regs.TBCTL.bit.CTRMODE = 0; // count up and start // Wait for ADC interrupt for(;;) { 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 == 9) { 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; } 参照ADC_soc实例程序改的。我可以正常进入中断程序,但是ADCRESULT0和ADCRESULT1的值总是没有变化。 求大神帮帮忙看看。困扰我1个星期了! ` |
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