[Urgent] ADC code of LPC1768

#include<lpc17xx.h>

void ADC_initail()
{
	LPC_PINCON->PINSEL3=0xc0000000;
	LPC_ADC->ADCR=0x00200120;
	
}

void GPIO_config()
{
	LPC_PINCON->PINSEL0=0x00000000;
	LPC_PINCON->PINSEL1=0x00000000;
	LPC_PINCON->PINSEL2=0x00000000;
	LPC_PINCON->PINSEL3=0x00000000;
	LPC_PINCON->PINSEL4=0x00000000;
	LPC_PINCON->PINSEL5=0x00000000;
	LPC_PINCON->PINSEL6=0x00000000;
	LPC_PINCON->PINSEL7=0x00000000;
	LPC_PINCON->PINSEL8=0x00000000;
	LPC_PINCON->PINSEL9=0x00000000;
	LPC_PINCON->PINSEL10=0x00000000;
}

void delay(unsigned int m)
{
unsigned int i,j;
	for(i=0;i<m;i++)
	for(j=0;j<12000;j++);
}


void command(unsigned char da)
{
unsigned int val;
	
	LPC_GPIO2->FIODIR=0X000038ff;
	LPC_GPIO2->FIOCLR=0X000038ff;
	
	delay(4);

	val=da;
	LPC_GPIO2->FIOSET=val;
	
	LPC_GPIO2->FIOSET=0X00002000;
	LPC_GPIO2->FIOCLR=0X00002000;
	
}

void dataa(unsigned char da)
{
unsigned int val;
	
	LPC_GPIO2->FIODIR=0X000038FF;
	LPC_GPIO2->FIOCLR=0X000038FF;
	
	delay(3);
	
	val=da;
	LPC_GPIO2->FIOSET=val;
	LPC_GPIO2->FIOSET=0X000002800;
	LPC_GPIO2->FIOCLR=0X000002000;

}

void lcd_initail()
{
	command(0x38);
	command(0x0e);
	command(0x06);
	command(0x01);

}

int main()
{
	unsigned int adc_val;

	unsigned char a[4]={0};
	
	GPIO_config();
	ADC_initail();
	lcd_initail();
			
	while(1)
	{
		LPC_ADC->ADCR=(LPC_ADC->ADCR | 0x01000000);
		while((LPC_ADC->ADGDR & 0x80000000)==0x00000000);
		adc_val=(LPC_ADC->ADGDR & 0x0000fff0);
                adc_val=adc_val>>4;
		a[0]=adc_val%10;
		adc_val=adc_val/10;
		a[1]=adc_val%10;
		adc_val=adc_val/10;
		a[2]=adc_val%10;
		adc_val=adc_val/10;
		a[3]=adc_val%10;
		command(0xc0);
		dataa(a[3]);
		dataa(a[2]);
		dataa(a[1]);
		dataa(a[0]);
		
	}
}