28335ADC-TI中文支持网

以下示例是关于28335ADC的设置程序，程序中没有出现关于ADCTRL1寄存器设置的语句，它的默认状态是什么？程序是正常的可以采样的

#include "DSP28x_Project.h"
#include "ADC.h"
interrupt void adc_isr(void);
Uint16 LoopCount;
Uint16 ConversionCount;
void ADC()
{

   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;
   EALLOW;
   PieVectTable.ADCINT = &adc_isr;
   EDIS;
   InitAdc();
   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 = 0x08; // Setup ADCINA0 (是B0)as 1st SEQ1 conv.
   AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x09; // Setup ADCINA1(B1) 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;       // 4.Select SOC from from CPMA on upcount
   EPwm1Regs.ETPS.bit.SOCAPRD = 1;        // Generate pulse on 1st event
//  EPwm1Regs.CMPA.half.CMPA = 0x0080;     // Set compare A value
//   EPwm1Regs.TBPRD = 0xFFFF;              // Set period for ePWM1
//  EPwm1Regs.TBCTL.bit.CTRMODE = 0;       // count up and start

// Wait for ADC interrupt
/*  for(;;)
   {
      LoopCount++;
   }
*/

mangui zhang：

ADCTRL1的相关控制应该在函数 InitAdc(); 里面

以下示例是关于28335ADC的设置程序，程序中没有出现关于ADCTRL1寄存器设置的语句，它的默认状态是什么？程序是正常的可以采样的

#include "DSP28x_Project.h"
#include "ADC.h"
interrupt void adc_isr(void);
Uint16 LoopCount;
Uint16 ConversionCount;
void ADC()
{

// LoopCount = 0;
ConversionCount = 0;

// Wait for ADC interrupt
/*  for(;;)
   {
      LoopCount++;
   }
*/

user4737222：

回复 mangui zhang:

void InitAdc(void){ extern void DSP28x_usDelay(Uint32 Count); // *IMPORTANT* // The ADC_cal function, which copies the ADC calibration values from TI reserved // OTP into the ADCREFSEL and ADCOFFTRIM registers, occurs automatically in the // Boot ROM. If the boot ROM code is bypassed during the debug process, the // following function MUST be called for the ADC to function according // to specification. The clocks to the ADC MUST be enabled before calling this // function. // See the device data manual and/or the ADC Reference // Manual for more information. EALLOW; SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 1; ADC_cal(); EDIS; // To powerup the ADC the ADCENCLK bit should be set first to enable // clocks, followed by powering up the bandgap, reference circuitry, and ADC core. // Before the first conversion is performed a 5ms delay must be observed // after power up to give all analog circuits time to power up and settle // Please note that for the delay function below to operate correctly the // CPU_RATE define statement in the DSP2833x_Examples.h file must // contain the correct CPU clock period in nanoseconds. AdcRegs.ADCTRL3.all = 0x00E0; // Power up bandgap/reference/ADC circuits/somde=0顺序 DELAY_US(ADC_usDELAY); // Delay before converting ADC channels}

这就是那 InitAdc(void)子函数，没有设置
而且，这里面ADC_cal()子函数也是有定义，没有内容

以下示例是关于28335ADC的设置程序，程序中没有出现关于ADCTRL1寄存器设置的语句，它的默认状态是什么？程序是正常的可以采样的

#include "DSP28x_Project.h"
#include "ADC.h"
interrupt void adc_isr(void);
Uint16 LoopCount;
Uint16 ConversionCount;
void ADC()
{

// LoopCount = 0;
ConversionCount = 0;

// Wait for ADC interrupt
/*  for(;;)
   {
      LoopCount++;
   }
*/

user4737222：

回复 Brian Wang0:

感谢感谢

28335ADC

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