how to access the external interface output from ads8568 into DSP TMS320F28835.

8420.ITSV1P7_ANALOG_ADC.pdf I want example code how to give lead,  active  and trail in XTIMCLK how to enable XRD to get data. please help me. here i am also sending schematic.

#include "DSP2833x_Device.h"
#include "stdio.h"

//extern void Delay(unsigned int Data);

#define ADC_CS GpioDataRegs.GPADAT.bit.GPIO19
#define ADC_CNV_A GpioDataRegs.GPADAT.bit.GPIO9
#define ADC_CNV_B GpioDataRegs.GPADAT.bit.GPIO10
#define ADC_CNV_C GpioDataRegs.GPADAT.bit.GPIO11
#define ADC_CNV_D GpioDataRegs.GPADAT.bit.GPIO12
#define ADC_OUT GpioDataRegs.GPCDAT.all
#define ADC_RST GpioDataRegs.GPADAT.bit.GPIO20
#define ADC_INT GpioDataRegs.GPADAT.bit.GPIO0
#define ADC_WR GpioDataRegs.GPBDAT.bit.GPIO38
void Delay(unsigned int Data);
void ADC_Read(void);
void ADC_Reset(void);
void ADC_Init(void);
unsigned int reverse(unsigned int x);

void ADC_Init(void) //initialisation to their default values
{
ADC_INT = 1;
ADC_CS = 1;
ADC_WR = 1;
ADC_CNV_A = 0;
ADC_CNV_B = 0;
ADC_CNV_C = 0;
ADC_CNV_D = 0;
ADC_RST = 0;
}

void ADC_Reset(void) // ADC Reset
{
ADC_RST = 1;
Delay(0xFF);
ADC_RST = 0;
}

void ADC_Config(void) // ADC Config
{
GpioCtrlRegs.GPCDIR.all = 0xFFFFFFFF;
ADC_CS = 0;
ADC_WR = 0;
ADC_OUT = 0xC800;
Delay(0x05);
ADC_WR = 1;
Delay(0x02);
ADC_WR = 0;
ADC_OUT = 0x03FF;
Delay(0x05);
ADC_WR = 1;
ADC_CS = 1;
GpioCtrlRegs.GPCDIR.all = 0x00000000;
}

void ADC_Read(void)
{
unsigned int ADC_Data[8] = {0x0000};

ADC_CS = 0; // parallel interface enable
ADC_CNV_A = 1;
Delay(0x05);
while(!ADC_INT);
ADC_CNV_A = 0;
ADC_CS = 0; // parallel interface enable
ADC_Data[0] = ADC_OUT & 0xFFFF; //channel A0
ADC_Data[0] = reverse(ADC_Data[0]);
Delay(0x05);
ADC_Data[1] = ADC_OUT & 0xFFFF; //channel A1
ADC_Data[1] = reverse(ADC_Data[1]);

ADC_CNV_B = 1;
Delay(0x05);
ADC_CNV_B = 0;
Delay(0x05);
while(!ADC_INT);
ADC_Data[2] = ADC_OUT & 0xFFFF;
ADC_Data[2] = reverse(ADC_Data[2]); //channel B0
Delay(0x05);
ADC_Data[3] = ADC_OUT & 0xFFFF; //channel B1
ADC_Data[3] = reverse(ADC_Data[3]);

ADC_CNV_C = 1;
Delay(0x05);
ADC_CNV_C = 0;
Delay(0x05);
while(!ADC_INT);
ADC_Data[4] = ADC_OUT & 0xFFFF; //channel C0
ADC_Data[4] = reverse(ADC_Data[4]);
Delay(0x05);
ADC_Data[5] = ADC_OUT & 0xFFFF; //channel C1
ADC_Data[5] = reverse(ADC_Data[5]);

ADC_CNV_D = 1;
Delay(0x05);
ADC_CNV_D = 0;
Delay(0x05);
while(!ADC_INT);
ADC_Data[6] = ADC_OUT & 0xFFFF; //channel D0
ADC_Data[6] = reverse(ADC_Data[6]);
Delay(0x05);
ADC_Data[7] = ADC_OUT & 0xFFFF; //channel D1
ADC_Data[7] = reverse(ADC_Data[7]);

ADC_WR = 0; // Parallel data input in disabled
ADC_CS = 0; // parallel interface disable

}

unsigned int reverse(unsigned int x)
{
x = (((x & 0xaaaa) >> 1) | ((x & 0x5555) << 1));
x = (((x & 0xcccc) >> 2) | ((x & 0x3333) << 2));
x = (((x & 0xf0f0 ) >> 4) | ((x & 0x0f0f ) << 4));
x = (((x & 0xff00 ) >> 8) | ((x & 0x00ff ) << 8));
return((x >> 8) | (x << 8));

}

void Delay(unsigned int Data)
{
while(Data--);
}