ADC code for lpc 2148

hi friends ,
I am new to ARM ..I have developed a code for ADC , i am giving external DC voltage to ADC which it should convert into digital data and show in the system...



#include<LPC214x.h>
#include<stdio.h>

#include<string.h>
#include"LPCLCD.h"
#include"LPCCOM.h"


char buff[20];
unsigned int ADC1_Read(void);
unsigned int adc_out=0,loc=0;
char D_Buf[4];
int main()
{
VPBDIV=0x01;
Seril_Init(0,38400,9600);
Com0_Int_Enable();

lcd_init();
message(0x80,"Sampling");
PINSEL1|=0x15480000;
DACR=1<<16;

while(1)
{

adc_out=ADC1_Read();
sprintf(buff,"%d,",adc_out);

}
}
unsigned int ADC1_Read(void)
{
unsigned int i=0;
AD0CR = 0x00240602 ; // Init ADC (Pclk = 12MHz) and select channel 1,8bit digital data
AD0CR |= 0x01000000; // Start A/D Conversion
do
{
i = AD0DR1; // Read A/D Data Register
} while ((i & 0x80000000) == 0); // Wait for end of A/D Conversion
delay(9);
return (i >> 6) & 0x00FF; // bit 6:15 is 8 bit AD value

}


the code is executing ,but i am not able to receive the data in the system .......plz help me its urgent