ADC (anlog to digital)

                          ANLOG TO DIGITAL 




PINSEL1 :  where it is used to change the pin state either input are output state 

ADCR : Adddres control register used to enable state of adc block 

ADDR: Addres data register



program code

#include<lpc21xx.h>

int main()
{
 int result;
 PINSEL1 |=(1<<24);   //pin configuration
 PINSEL1 &= ~(1<<25);
 ADCR=(1<<1) | (3<<8)| (1<<16) | (1<<21);              //adc configuration
 while(1)
 {
  while(!(ADDR & (1<<31))); //if addr bit 1 then
  result=ADDR & (0x3ff<<6); //read the result
  result=result>>6;   //then shift back
  lcd_num(result/3.3);  //if we divid result with 3.3 then we will get duty cycle
  delay(1000);
   }
}




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