ADC转化问题

只看该作者 · 2015-6-11 08:58

本帖最后由小雪88 于 2015-6-11 09:05 编辑

DSP菜鸟上路，求各位大神指点。我用的芯片是28069.在DSP芯片中所有的初始化都是一样的吗？在一个工程里面，所有的时钟是不是都应该和系统时钟保持一致？
ADC转化时如果用软件的方式触发，是直接将AdcRegs.ADCSOCFRC1.all对应的位置一就可以开始转化了吗？
附上我的AD采样代码，请各位大神指点。
//ADC初始化
InitAdc();
      EALLOW;
      AdcRegs.ADCCTL2.bit.ADCNONOVERLAP = 1;       //Enable non-overlap mode
      AdcRegs.ADCCTL1.bit.TEMPCONV  = 0;                //Connect channel A5 internally to the temperature sensor
AdcRegs.ADCSOC0CTL.bit.CHSEL  = 8;                //Set SOC0 channel select to ADCINA5
      AdcRegs.ADCSOC0CTL.bit.ACQPS  = 6;                //Set SOC0 acquisition period to 26 ADCCLK
      AdcRegs.ADCSOC0CTL.bit.TRIGSEL       = 0;
      AdcRegs.INTSEL1N2.bit.INT1SEL = 0;                //Connect ADCINT1 to EOC0
      AdcRegs.INTSEL1N2.bit.INT1E  =  1;                //Enable ADCINT1
      AdcRegs.INTSEL1N2.bit.INT1CONT = 1;
      AdcRegs.ADCINTSOCSEL1.bit.SOC0  = 1;
         // Set the flash OTP wait-states to minimum. This is important
         // for the performance of the compensation function.
      FlashRegs.FOTPWAIT.bit.OTPWAIT = 1;

void InitAdc(void)
{
extern void DSP28x_usDelay(Uint32 Count);
      EALLOW;
      SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 0;
      (*Device_cal)();
      EDIS;
EALLOW;
AdcRegs.ADCCTL1.bit.ADCBGPWD  = 1;    // Power ADC BG
AdcRegs.ADCCTL1.bit.ADCREFPWD = 1;    // Power reference
AdcRegs.ADCCTL1.bit.ADCPWDN = 1;    // Power ADC
AdcRegs.ADCCTL1.bit.ADCENABLE = 1;    // Enable ADC
AdcRegs.ADCCTL1.bit.ADCREFSEL = 0;    // Select interal BG
EDIS;

DELAY_US(ADC_usDELAY);       // Delay before converting ADC channels

EALLOW;
AdcRegs.ADCCTL2.bit.CLKDIV2EN = 0;
EDIS;

DELAY_US(ADC_usDELAY);       // Delay before converting ADC channels
}

for(;;)
{
         AdcRegs.ADCSOCFRC1.all = 0x01;
         while(AdcRegs.ADCINT标志寄存器.bit.ADCINT1 == 0){}  //Wait for ADCINT1
         AdcRegs.ADCINT标志寄存器CLR.bit.ADCINT1 = 1;       //Clear ADCINT1
         //Get temp sensor sample result from SOC1
         CH1 = (AdcResult.ADCRESULT0>>4);
         SciaRegs.SCIRXBUF.all=CH1;
   //  msg = "\r\nEnter a character: \0";
   // scia_msg(msg);
   // Wait for inc character
   while(SciaRegs.SCIFFRX.bit.RXFFST !=1) { } // wait for XRDY =1 for empty state
   // Get character
   ReceivedChar = SciaRegs.SCIRXBUF.all;

   // Echo character back
   //  msg = "  You sent: \0";
  //    scia_msg(msg);
   scia_xmit(ReceivedChar);

}

只看该作者 · 2015-6-11 20:46

// Wait for inc character
   while(SciaRegs.SCIFFRX.bit.RXFFST !=1) { } // wait for XRDY =1 for empty state
   // Get character
   ReceivedChar = SciaRegs.SCIRXBUF.all;