lpc2148 + gnu arm

I am new to lpc2148. I have installed gnuarm on my Debian machine.I have 
read the the user manual for lpc2148. and have written ledblinking.c.But 
i dont know which header file to include compiler option.
Also i need information about adc and pwm using lpc2148.
Kindly help.

void delay()
{
  unsigned int i;
  for(i=0;i<100000;i++);
}
main()
{
  IO0DIR=0x00000080;
  while(1)
  {
    IO0CLR=0x00000080;
    delay();
    IO0SET=0x00000080;
    delay();
  }
}