diff options
Diffstat (limited to 'basys3/basys3.srcs/ppu_dispctl.vhd')
| -rw-r--r-- | basys3/basys3.srcs/ppu_dispctl.vhd | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/basys3/basys3.srcs/ppu_dispctl.vhd b/basys3/basys3.srcs/ppu_dispctl.vhd index 1465a58..ce53557 100644 --- a/basys3/basys3.srcs/ppu_dispctl.vhd +++ b/basys3/basys3.srcs/ppu_dispctl.vhd @@ -15,7 +15,7 @@ entity ppu_dispctl is port( RO,GO,BO : out std_logic_vector(PPU_COLOR_OUTPUT_DEPTH-1 downto 0); -- VGA color out NVSYNC, NHSYNC : out std_logic; -- VGA sync out - THBLANK, TVBLANK : out std_logic; -- tiny sync signals + THBLANK, TVBLANK : out std_logic := '0'; -- tiny sync signals ACTIVE : out std_logic); -- screen currently active (currently same for tiny/native, TODO: offset tiny for first scanline) end ppu_dispctl; @@ -73,7 +73,6 @@ begin -- tiny VCOUNT and HCOUNT process(TPIXCLK, NPIXCLK, RESET) variable TMP_T_POS_X : unsigned(PPU_SCREEN_T_POS_X_WIDTH-1 downto 0) := (others => '0'); - variable TMP_THBLANK, TMP_TVBLANK : std_logic := '0'; variable TMP_NHCOUNT, TMP_NVCOUNT : unsigned(PPU_VGA_SIGNAL_PIXEL_WIDTH-1 downto 0) := (others => '0'); variable TMP_NHACTIVE, TMP_NVACTIVE : std_logic := '0'; variable TMP_NHSYNC, TMP_NVSYNC : std_logic := '0'; @@ -84,8 +83,6 @@ begin TMP_NVCOUNT := (others => '0'); TMP_NHACTIVE := '0'; TMP_NVACTIVE := '0'; - TMP_THBLANK := '0'; -- TODO - TMP_TVBLANK := '0'; -- TODO TMP_NVSYNC := '0'; TMP_NHSYNC := '0'; end if; @@ -135,9 +132,6 @@ begin if falling_edge(TPIXCLK) then -- NOTE: falling edge used because of clock offset of 90 (should be 270) T_POS_X <= TMP_T_POS_X; - THBLANK <= TMP_THBLANK; - TVBLANK <= TMP_TVBLANK; - if TMP_NACTIVE = '1' then TMP_T_POS_X := TMP_T_POS_X + 1; if TMP_T_POS_X >= PPU_SCREEN_WIDTH then @@ -165,4 +159,9 @@ begin reset => RESET, npxclk => NPIXCLK, tpxclk => TPIXCLK); + + THBLANK <= (not NHACTIVE) and NVACTIVE and nor(T_POS_X); + TVBLANK <= not NVACTIVE; + --THBLANK <= '0'; + --TVBLANK <= '0'; end Behavioral; |