Control directiion of DC motor

Hi Folks,

I have interfaced a DC motor and a keyboard with LPC2138, so that I can use the switches to control the direction of DC Motor. Here is the code which I used to perform the desired operation, but somehow this code is not responding. Can anyone please help me on this.

Here's the code :

#include<lpc21XX.h>

/*void Delay (int a)
{ int i; for (i=0;i<a*100;i++);
}*/
int MotorDirection()
{

int w;
IO0SET = 0X000E0000;
IO0CLR = 0X00010000; // Row 1 used
w = IO1PIN & 0X00F00000; // Read the columns
switch(w)
{

case 0X00E00000 : IO1SET = 0X00050000; // Clk rotation of Motor return IO1SET;

case 0X00D00000 : IO1SET = 0X00060000; // AntiClk rotation of Motor return IO1SET;

case 0X00B00000 : IO1SET = 0X00050000; // Clkwise return IO1SET;

case 0X00700000 : IO1SET = 0X00060000; // AntiClkwise return IO1SET; }
}

int main()
{

IO1DIR = 0X00070000; // IN1=1.16,IN2=1.17,EN=1.18 - Output to L293D
IO0DIR = 0X000F00000; // 0.16,0.17,0.18,0.19 as Rows & 0.20 - 0.23 as Columns

while(1)

{

MotorDirection();

}

}