7 Segment Display has seven segments in it and each segment has one LED inside it to display the numbers by lighting up the corresponding segments. Like if you want the 7-segment to display the number "5" then you need to glow segment a,f,g,c, and d by making their corresponding pins high. There are two types of 7-segment displays: Common Cathode and Common Anode, here we are using Common Cathode seven segment display.

      Figure-02 Pin configuration for seven segment display  

#include <LPC214x.H>
unsigned char dig[]= {0x88,0xeb,0x4c,0x49,0x2b,0x19,0x18,0xcb,0x8,0x9,0xa,0x38,0x9c,0x68,0x1c,0x1e};

void delay(unsigned int count)
{
	int j=0,i=0;
	for(j=0;j<count;j++)
	{
		for(i=0;i<120;i++);
	}
}

int main(void)
{
	unsigned char count=0;
	unsigned int i=0;
	IO0DIR |= (1 << 11);
	IO0SET |= (1 << 11);
	IO0DIR |= 0x007F8000;
	while(1)
	{
		count++;
		if(count == 16)count=0;
		for(i=0;i<800;i++)
		{
			IO0CLR = 0x007f8000;
			IO0SET = (dig[count] << 15);
			delay(200);
		}
  }
}