vhdl_YUV: Fix sync dection bug when sync out of range (v8.1)

Change-Id: I98fbbb32ced4fdded40c14ef8f741de6f0a415bd

vhdl_YUV_6bit/RGBtoHDMI.vhdl

@@ -49,7 +49,7 @@ architecture Behavorial of RGBtoHDMI is
 
     -- Version number: Design_Major_Minor
     -- Design: 0 = Normal CPLD, 1 = Alternative CPLD, 2=Atom CPLD, 3=YUV6847 CPLD
-    constant VERSION_NUM  : std_logic_vector(11 downto 0) := x"380";
+    constant VERSION_NUM  : std_logic_vector(11 downto 0) := x"381";
 
     -- NOTE: the difference between the leading and trailing offsets is
     -- 256 clks = 32 pixel clocks.
@@ -236,7 +236,7 @@ begin
             if HS3 = '0' and HS2 = '1' then
                 -- Stop sampling on the trailing edge of HSYNC
                 sampling <= '0';
-            elsif HS2 = '1' and counter = "1111111" then
+            elsif counter = "1111111" then
                 -- Start sampling when the counter expires
                 sampling <= '1';
             end if;
@@ -379,8 +379,9 @@ begin
                 inv_R <= '1';
             end if;
 
-            -- generate the csync output
-            csync <= HS2;
+            -- generate the csync output from the most delayed version of HS
+            -- (csync adds an extra register, could save this in future)
+            csync <= HS5;
 
         end if;
     end process;

vhdl_YUV_6bit/fitting.notes

@@ -129,3 +129,14 @@ FB3          17/18       34/54       90/90*      9/ 9*
 FB4          17/18       39/54       84/90       6/ 7
              -----       -----       -----      -----
              70/72      136/216     264/360     29/34
+
+Fix sync dection bug when sync out of range (v8.1)
+
+Function    Mcells      FB Inps     Pterms      IO
+Block       Used/Tot    Used/Tot    Used/Tot    Used/Tot
+FB1          18/18*      39/54       55/90       6/ 9
+FB2          18/18*      23/54       36/90       8/ 9
+FB3          17/18       34/54       90/90*      9/ 9*
+FB4          18/18*      41/54       86/90       6/ 7
+             -----       -----       -----      -----
+             71/72      137/216     267/360     29/34