// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();
EALLOW;
PieVectTable.ADCINT = &adc_isr;
EDIS;
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;
AdcRegs.ADCMAXCONV.all = 0x0000; // Setup 1 conv's on SEQ1
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x7; // Setup ADCINA0 as 1st 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)
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group ADC转换序列A启动使能位 1使能
EPwm1Regs.ETSEL.bit.SOCASEL = 4; // Select SOC from from CPMA on upcount EPWMxSOCA脉冲生成选择位
//100:计数器增加时,TBCTR=CMPA
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event 该位决定发生多少个事件后产生EPWMxSOCA
EPwm1Regs.TBPRD = 0xFFFF; // Set period for ePWM1 确定定时器的周期,设置PWM的频率
//2^16=65536
//PWM的周期也就是采样周期为[1/(75*1000000)]*65536
EPwm1Regs.TBCTR=0X0000; //清除TB计数器
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // count up and start定时器计数模式 00:连续增模式
// Wait for ADC interrupt
for(;;)
{
LoopCount++;
}
// 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
#include "DSP2833x_Examples.h" // DSP2833x Examples Include File
interrupt void adc_isr(void);
Uint16 LoopCount;
Uint16 ConversionCount;
Uint16 Voltage1[10];
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;
DINT;
InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();
EALLOW;
PieVectTable.ADCINT = &adc_isr;
EDIS;
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;
AdcRegs.ADCMAXCONV.all = 0x0000; // Setup 1 conv's on SEQ1
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x7; // Setup ADCINA0 as 1st 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)
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group ADC转换序列A启动使能位 1使能
EPwm1Regs.ETSEL.bit.SOCASEL = 4; // Select SOC from from CPMA on upcount EPWMxSOCA脉冲生成选择位
//100:计数器增加时,TBCTR=CMPA
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event 该位决定发生多少个事件后产生EPWMxSOCA
EPwm1Regs.TBPRD = 0xFFFF; // Set period for ePWM1 确定定时器的周期,设置PWM的频率
//2^16=65536
//PWM的周期也就是采样周期为[1/(75*1000000)]*65536
EPwm1Regs.TBCTR=0X0000; //清除TB计数器
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // count up and start定时器计数模式 00:连续增模式
// Wait for ADC interrupt
for(;;)
{
LoopCount++;
}
}
interrupt void adc_isr(void)
{
Voltage1[ConversionCount] = AdcRegs.ADCRESULT0 >>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;
}
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