Index: /firmware/FTM/ftm_definitions.vhd
===================================================================
--- /firmware/FTM/ftm_definitions.vhd	(revision 10248)
+++ /firmware/FTM/ftm_definitions.vhd	(revision 10249)
@@ -36,5 +36,5 @@
 use IEEE.STD_LOGIC_ARITH.ALL;
 use IEEE.STD_LOGIC_UNSIGNED.ALL;
--- use IEEE.NUMERIC_STD.ALL;
+use IEEE.NUMERIC_STD.ALL;
 
 package ftm_array_types is
@@ -322,6 +322,6 @@
 -- Timing counter
   constant tc_width : integer := 48;    -- width (number of bits) of timing counter
- -- constant zero : unsigned (tc_width - 1 downto 0) := 0;  
- -- constant zero : unsigned  := 0;  
+constant zero : unsigned (tc_width - 1 downto 0) := (others => '0');  
+