kopia lustrzana https://github.com/hoglet67/RGBtoHDMI
CPLD: Align quad timing back to cycle 0 as before
Change-Id: I0dd0504670f8e79f8139bc5f38bd7f8af52b8950pull/56/head
rodzic
a58cd27837
commit
55e5d8f683
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@ -281,15 +281,18 @@ begin
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end if;
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-- Pipeline when to update the quad
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if counter(counter'left) = '0' and (
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(rate = "00" and counter(4 downto 0) = 0) or -- normal
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(rate = "01" and counter(3 downto 0) = 0) or -- double
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(rate = "10" and counter(5 downto 0) = 0) or -- subsample even
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(rate = "11" and counter(5 downto 0) = 32)) then -- subsample odd
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-- toggle is asserted in cycle 1
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toggle <= '1';
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else
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toggle <= '0';
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toggle <= '0';
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if counter(counter'left) = '0' then
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-- toggle changes at the start of cycle 0
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if (mode7 = '0' and counter(2 downto 0) = 5) or (mode7 = '1' and counter(2 downto 0) = 7) then
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if rate = "00" and counter(4 downto 3) = "11" then
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toggle <= '1'; -- normal
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elsif rate = "01" and counter(3) = '1' then
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toggle <= '1'; -- double
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elsif counter(5) /= rate(0) and counter(4 downto 3) = "11" then
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toggle <= '1'; -- subsample
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end if;
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end if;
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end if;
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-- Output quad register
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@ -298,7 +301,7 @@ begin
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elsif counter(counter'left) = '1' then
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quad <= (others => '0');
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elsif toggle = '1' then
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-- quad changes at the start of cycle 2
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-- quad changes at the start of cycle 1
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quad(11) <= shift_B(3);
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quad(10) <= shift_G(3);
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quad(9) <= shift_R(3);
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@ -316,7 +319,7 @@ begin
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-- Output a skewed version of psync
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if version = '0' or counter(counter'left) = '1' then
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psync <= '0';
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elsif counter(3 downto 0) = 3 then -- comparing with N gives N-1 cycles of skew
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elsif counter(3 downto 0) = 2 then -- compare with N gives a skew of N
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if rate = "00" then
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psync <= counter(5); -- normal
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elsif rate = "01" then
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@ -488,3 +488,14 @@ FB3 18/18* 28/54 64/90 9/ 9*
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FB4 18/18* 33/54 81/90 5/ 7
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----- ----- ----- -----
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71/72 118/216 232/360 29/34
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44. Align quad timing back to cycle 0 as before
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Function Mcells FB Inps Pterms IO
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Block Used/Tot Used/Tot Used/Tot Used/Tot
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FB1 18/18* 38/54 54/90 7/ 9
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FB2 18/18* 23/54 36/90 8/ 9
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FB3 18/18* 28/54 64/90 9/ 9*
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FB4 17/18 33/54 82/90 5/ 7
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----- ----- ----- -----
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71/72 122/216 236/360 29/34
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