VHDL/Verilog program - Mini2440 ARM9 1bit LED on/off and blinking

Our Pluto I board has Altera ACEX1K Family and Chip is EP1K10TC100-3. Pin Connections-

CLK-71
INT-70
ADDR-26
data-6
wr-23
rd-28
wait-50
INT3-70

 module ledmmio(clk, LED,ADDR,wr,rd,data,rdwait,intt);

 input clk;

 output LED;

 input ADDR;

 input wr;

 input rd;

 inout data;

 inout rdwait;

 inout intt;

 reg [0:0]rdwait1;

 reg [0:0]data1;

 reg [0:0]data2 = 0;

 reg [0:0]LEDval = 0;

 reg [0:0]intt1 = 1;

 reg [4:0]timer = 0;

 always @(posedge clk)

   begin

     if(ADDR == 0 && rd == 0) /*Read*/

       begin

         data1 = data2;

         LEDval <= data2;

         rdwait1 <= 1'b0;

         intt1 <= 1'bz;

         timer = 1;

      end

   else if(ADDR == 0 && wr == 0) /*Write*/

     begin

       data1 = (data);

       LEDval <=data1;

       data2 = data1;

       rdwait1 <=1'b0;

       intt1 <= 1'bz;

       timer = 1;

     end

   else /*Not in Read/Write*/

     begin 

       if(timer > 0) /*Int gen after some clk cylc*/

         begin

           if(timer > 28 && timer <= 31) intt1 <= 1'b0;

           timer = (timer == 5'b11111) ? 0 : timer + 1'b1;

         end

       data1 = 1'bz;

       rdwait1 <= 1'bz;

       if(timer == 0)intt1 <= 1'bz;

     end

   end

 assign data = data1;

 assign LED = LEDval;

 assign rdwait = rdwait1;

 assign intt = intt1;

 endmodule

Please note - wr, rd, wait, INT and ADDR (Chip Select) are all negative logic signals. Zero means they have been activated.

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