[ARM] ADC prblem in LPC2148 showing constant values

[msreenu92]

any one can help me

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Code C - [expand]
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void ADC_init()
{   
    VPBDIV=0x00;
    PINSEL1|=(1<<24)|(1<<26);   // CONFIGURE THE PIN FUNCTION FOR ADC
    AD0CR|=(1<<1)|(1<<2);    
    AD0CR |=0x00210F00;
}
 
unsigned int temp()
{
 unsigned char i=0;
 AD0CR |= 0x01000000;        
 do
      {
        i = AD0GDR; // Read A/D Data Register
      } while ((i & 0x80000000) == 0); // Wait for end of A/D Conversion
        AD0CR &= ~0x01000000;
       return (i >> 6) & 0x03FF; 
}
 
unsigned int light()
 {
   unsigned char data;
 AD0CR |= 0x01000000;        
 do
      {
        data = AD0GDR; // Read A/D Data Register
      } while ((data & 0x80000000) == 0); // Wait for end of A/D Conversion
        AD0CR &= ~0x01000000;
       return (data >> 6) & 0x03FF; 
}

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