ADC.rar_ADC程序

//编译前确保CPU时钟频率在DSP281x_Examples.h 中正确定义 #include "DSP281x_Device.h" #include "DSP281x_Examples.h" interrupt void adc_isr(void); //全局变量定义 Uint16 LoopCount; Uint16 ConversionCount; Uint16 Voltage1[3]; Uint16 Voltage2[3]; main() { InitSysCtrl(); //高速外围时钟定标寄存器,配置：系统时钟/6=25Mhz (系统时钟150Mhz) EALLOW; SysCtrlRegs.HISPCP.all = 0x3; //外围高速时钟HSPCLK = 系统时钟/(2*HISPCP) EDIS; DINT; InitPieCtrl(); IER = 0x0000; IFR = 0x0000; InitPieVectTable(); EALLOW; PieVectTable.ADCINT = &adc_isr; EDIS; InitAdc(); //初始化ADC //在PIE中使能ADCINT PieCtrlRegs.PIEIER1.bit.INTx6 = 1; IER |= M_INT1; //使能CPU中断1 EINT; //使能全局中断INTM ERTM; //使能全局实时中断 DBGM LoopCount = 0; ConversionCount = 0; //配置ADC AdcRegs.ADCMAXCONV.all = 0x0008; //最大转换通道寄存器 AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; //输入通道选择排序寄存器 // AdcRegs.ADCCHSELSEQ1.all = 0x1110; //输入通道选择排序寄存器 // AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x2; //输入通道选择排序寄存器 AdcRegs.ADCTRL2.bit.EVA_SOC_SEQ1 = 1; //使能 EVASOC 启动 SEQ1 //AdcRegs.ADCTRL2.bit.SOC_SEQ1 = 1; //软件启动 SEQ1 AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1; //使能 SEQ1 中断 AdcRegs.ADCTRL1.bit.SEQ_CASC = 1; //级联排序器操作，双(0)单(1) //配置EVA EvaRegs.T1CMPR = 0x0f00; //Timer1比较寄存器(当前的比较值) EvaRegs.T1PR = 0xFFFF; //Timer1周期寄存器(当前的周期值) EvaRegs.GPTCONA.bit.T1TOADC = 1; //使能 EVASOC in EVA EvaRegs.T1CON.all = 0x1042; //Timer1控制寄存器;TMODE 连续增;Timer 使能;Timer 比较使能 //等待ADC中断 while(1) { LoopCount++; } } interrupt void adc_isr(void) { Voltage1[ConversionCount] = AdcRegs.ADCRESULT0 >>4; Voltage2[ConversionCount] = AdcRegs.ADCRESULT1 >>4; if(ConversionCount == 2) { ConversionCount = 0; } else ConversionCount++; //重新初始化，等待下一个 ADC 结果 AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1; //重启 SEQ1 AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1; //清除 INT SEQ1 位 PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; //允许 PIE 中断 return; }