start gpio

06-07-08-09-SystemOnChip/AhbLiteComponents/hdl/ahbGpio_studentVersion.vhd

@@ -17,17 +17,46 @@
 -- Read registers
 -- 00, data register provides the values detected on the lines.
 --
+signal addresses is unsigned(32 downto 0);
+signal bRead is std_ulogic;
+signal bWrite is std_ulogic;
+
 ARCHITECTURE studentVersion OF ahbGpio IS
 BEGIN
 
+  process(hReset_n, hClk) begin
+    if hReset_n = '1' then
+      -- AHB-Lite
+      hRData  <=  (OTHERS => '0');
+      hReady  <=  '0';  
+      hResp   <=  '0';  
+
+      -- Out
+      ioOut <= (OTHERS => '0');
+      ioEn  <= (OTHERS => '0');
+
+      addresses  <=  (OTHERS => '0');
+      bRead <= '0';
+      bWrite <= '1';
+    elsif rising_edge(hClk) then
+      if hSel = '1' then
+        CASE hAddr is
+          WHEN 00 =>
+          WHEN 01 =>
+          WHEN OTHERS
+        end CASE;
+      end if;
+    end if;
+  end process;
+
   -- AHB-Lite
-  hRData  <=	(OTHERS => '0');
-  hReady  <=	'0';	
-  hResp	  <=	'0';	
+--  hRData  <=	(OTHERS => '0');
+--  hReady  <=	'0';	
+--  hResp	  <=	'0';	
 
   -- Out
-  ioOut <= (OTHERS => '0');
-  ioEn  <= (OTHERS => '0');
+--  ioOut <= (OTHERS => '0');
+--  ioEn  <= (OTHERS => '0');
 
 END ARCHITECTURE studentVersion;