CCS/TMS320F28335: TMS320F28335

Please understand that I have no special knowledge of using an ADC or an LCD display.  But I have a good knowledge of the C programming language.

Neeraj Deshmukh said:

I am trying to take the output of ADC value from result data ADCRESULT0.

Please show the source code which does that.  The solution may be as simple as changing the type of a variable from float to int.

Thanks and regards,

-George

Please show the requested source code.  

Thanks and regards,

-George

I am extremely sorry for delay in responding due to some reasons, 

please find the source code below.

// Included Files

#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File

 // Defines for ADC start parameters

#if (CPU_FRQ_150MHZ)     // Default - 150 MHz SYSCLKOUT

 // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 150/(2*3)   = 25.0 MHz

#define ADC_MODCLK 0x3

#endif

#if (CPU_FRQ_100MHZ)

// HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 100/(2*2)   = 25.0 MHz

   #define ADC_MODCLK 0x2

#endif

// ADC module clock = HSPCLK/2*ADC_CKPS   = 25.0MHz/(1*2) = 12.5MHz

#define ADC_CKPS   0x1

 #define ADC_SHCLK 0xf   // S/H width in ADC module periods = 16 ADC clocks

#define AVG       1000 // Average sample limit

#define ZOFFSET   0x00 // Average Zero offset

#define BUF_SIZE   2048 // Sample buffer size

// Globals

Uint16 SampleTable[BUF_SIZE], V1raw ;

float V1;

// Main

void main(void)

{

   Uint16 i;

    // Step 1. Initialize System Control:

   // PLL, WatchDog, enable Peripheral Clocks

   // This example function is found in the DSP2833x_SysCtrl.c file.

   InitSysCtrl();

    // Specific clock setting for this example

   EALLOW;

   SysCtrlRegs.HISPCP.all = ADC_MODCLK;   // HSPCLK = SYSCLKOUT/ADC_MODCLK

   EDIS;

    // Step 2. Initialize GPIO:

   // This example function is found in the DSP2833x_Gpio.c file and

   // illustrates how to set the GPIO to it's default state.

  // InitGpio(); // Skipped for this example

  // Step 3. Clear all interrupts and initialize PIE vector table:

   // Disable CPU interrupts

    DINT;

   // Initialize the PIE control registers to their default state.

   // The default state is all PIE interrupts disabled and flags

   // are cleared.

   // This function is found in the DSP2833x_PieCtrl.c file.

   InitPieCtrl();

    // Disable CPU interrupts and clear all CPU interrupt flags

   IER = 0x0000;

   IFR = 0x0000;

    // Initialize the PIE vector table with pointers to the shell Interrupt

   // Service Routines (ISR).

   // This will populate the entire table, even if the interrupt

   // is not used in this example. This is useful for debug purposes.

   // The shell ISR routines are found in DSP2833x_DefaultIsr.c.

   // This function is found in DSP2833x_PieVect.c.

    InitPieVectTable();

    // Step 4. Initialize all the Device Peripherals:

   // This function is found in DSP2833x_InitPeripherals.c

   // InitPeripherals(); // Not required for this example

   InitAdc(); // For this example, init the ADC

   // Specific ADC setup for this example:

     AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK;

   AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS;

   AdcRegs.ADCTRL1.bit.SEQ_CASC = 1;       // 1 Cascaded mode

   AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0;

   AdcRegs.ADCTRL1.bit.CONT_RUN = 1;       // Setup continuous run

  // Step 5. User specific code, enable interrupts:

  // Clear SampleTable

    for (i=0; i<BUF_SIZE; i++)

   {

       SampleTable[i] = 0;

   }

  // Start SEQ1

  AdcRegs.ADCTRL2.all = 0x2000;

   // Take ADC data and log the in SampleTable array

   for(;;)

   {

       for (i=0; i<AVG; i++)

       {

           //

           // Wait for interrupt

           //

           while (AdcRegs.ADCST.bit.INT_SEQ1== 0)

           {

           }

           AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;

           SampleTable[i] =((AdcRegs.ADCRESULT0>>4) );

           V1raw = ((AdcRegs.ADCRESULT0>>4) );

           V1 = V1raw*0.000732;

       }

   }

}

// End of File

In this code I want to display value of SampleTable[i] or V1raw on 16*2 LCD display as ADC="value of sample Table[i]". Please give me the code to do so.

I lack the expertise on C28x that is needed here.  I'll notify the C28x experts about this thread.

Thanks and regards,

-George

Thank you for your interest.