Function writing notes - blink led

// ****************************************************************************
// Program - Blinky
// Description - Blink LED
// Author - TL Fong
// Version - 0.39
// Date - 2013jul11hkt1310
// License - Free
// Hardware - Somy ARM Cortex M0 LPC1114/301 Learning Board
// Software - Keil uVision 4.71.2.0 ARM compiler toolchain
// Method - Incremental testing
// Hardware configuration notes
//   1. LED1 is connected to PIO1-8
// ****************************************************************************

#include <stdio.h>
#include "LPC11xx.h"
#include "timer.h"

void setPortPinDirection(int portNumber, int pinNumber)
  {
switch( portNumber )
{
    case 1:
      LPC_GPIO1->DIR |= (1 << pinNumber);
break;
    case 2:
LPC_GPIO2->DIR |= (1 << pinNumber);
 break;  
default:
 break;
}
}

void setPortPinValue(int portNumber, int pinNumber, int pinValue)
{
switch( portNumber )
{
case 1:
 if (pinValue == 1)
 LPC_GPIO1->DATA &= ~(1 << pinNumber);      
else
 LPC_GPIO1->DATA |= (1 << pinNumber);
break;
    case 2:
      ;
 break;  
default:
 break;
}
}

void blinkLed(int ledNumber, int onTime, int offTime, int blinkCount)
{
int count;

switch( ledNumber )
{
case 1:
setPortPinDirection(1, 8);
 
 for (count = 0; count < blinkCount; count--)
 {
 setPortPinValue(1, 8, 0);
        delayTenthSecond(onTime);    
   setPortPinValue(1, 8, 1);
        delayTenthSecond(offTime);
 }
      break;
    case 2:
      ;
 break;    
default:
 break;
}
}

int main()
  {
setPortPinDirection(1, 8);
blinkLed(1, 5, 10, 20);

  }

// ****************************************************************************
// End of Program
// ****************************************************************************