diff options
Diffstat (limited to 'basys3/basys3.srcs/ppu_sprite_bg.vhd')
| -rw-r--r-- | basys3/basys3.srcs/ppu_sprite_bg.vhd | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/basys3/basys3.srcs/ppu_sprite_bg.vhd b/basys3/basys3.srcs/ppu_sprite_bg.vhd index a0c4ba8..59cba9f 100644 --- a/basys3/basys3.srcs/ppu_sprite_bg.vhd +++ b/basys3/basys3.srcs/ppu_sprite_bg.vhd @@ -1,6 +1,4 @@ library ieee; -library work; - use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; use ieee.numeric_std.all; @@ -38,6 +36,10 @@ architecture Behavioral of ppu_sprite_bg is XO : out unsigned(PPU_SPRITE_POS_H_WIDTH-1 downto 0); -- new pixel position relative to tile YO : out unsigned(PPU_SPRITE_POS_V_WIDTH-1 downto 0)); -- new pixel position relative to tile end component; + component ppu_two_lut port( -- PPU tilemap word offset LUT (divide 8-bit number by 5) + pidx : in integer range 0 to 255; -- dividend + two : out integer range 0 to 255); -- result + end component; -- BAM and TMM in/out temp + registers signal T_BAM_ADDR, R_BAM_ADDR : std_logic_vector(PPU_BAM_ADDR_WIDTH-1 downto 0) := (others => '0'); @@ -56,8 +58,8 @@ architecture Behavioral of ppu_sprite_bg is signal TILE_IDX_X, TILE_IDX_Y : integer := 0; -- background canvas tile grid xy signal TILE_PIDX_X, TRANS_TILE_PIDX_X : unsigned(PPU_SPRITE_POS_H_WIDTH-1 downto 0) := (others => '0'); -- x position of pixel within tile (local tile coords) signal TILE_PIDX_Y, TRANS_TILE_PIDX_Y : unsigned(PPU_SPRITE_POS_V_WIDTH-1 downto 0) := (others => '0'); -- y position of pixel within tile (local tile coords) - signal TRANS_TILE_PIDX : integer := 0; -- index of pixel within tile (reading order) - signal TILEMAP_WORD_OFFSET : integer := 0; -- word offset from tile start address in TMM + signal TRANS_TILE_PIDX : integer range 0 to 255 := 0; -- index of pixel within tile (reading order) + signal TILEMAP_WORD_OFFSET : integer range 0 to 255 := 0; -- word offset from tile start address in TMM signal PIXEL_BIT_OFFSET : integer := 0; -- pixel index within word of TMM signal TMM_DATA_PAL_IDX : std_logic_vector(PPU_PALETTE_COLOR_WIDTH-1 downto 0); -- color of palette signal T_CIDX : std_logic_vector(PPU_PALETTE_CIDX_WIDTH-1 downto 0) := (others => '0'); -- output color buffer/register @@ -92,7 +94,8 @@ begin -- TMM address calculations TRANS_TILE_PIDX <= integer(PPU_SPRITE_WIDTH) * to_integer(TRANS_TILE_PIDX_Y) + to_integer(TRANS_TILE_PIDX_X); -- pixel index of sprite - TILEMAP_WORD_OFFSET <= TRANS_TILE_PIDX / PPU_PIXELS_PER_TILE_WORD; -- word offset from starting word of sprite + div: component ppu_two_lut port map(pidx => TRANS_TILE_PIDX, two => TILEMAP_WORD_OFFSET); + -- TILEMAP_WORD_OFFSET <= TRANS_TILE_PIDX / PPU_PIXELS_PER_TILE_WORD; -- word offset from starting word of sprite PIXEL_BIT_OFFSET <= TRANS_TILE_PIDX mod PPU_PIXELS_PER_TILE_WORD; -- pixel bit offset T_TMM_ADDR <= std_logic_vector(to_unsigned(PPU_SPRITE_WORD_COUNT * to_integer(unsigned(BAM_DATA_TILE_IDX)) + TILEMAP_WORD_OFFSET, PPU_TMM_ADDR_WIDTH)); -- TMM address |