diff options
Diffstat (limited to 'basys3/basys3.srcs/ppu.vhd')
| -rw-r--r-- | basys3/basys3.srcs/ppu.vhd | 76 |
1 files changed, 46 insertions, 30 deletions
diff --git a/basys3/basys3.srcs/ppu.vhd b/basys3/basys3.srcs/ppu.vhd index be4c404..0825259 100644 --- a/basys3/basys3.srcs/ppu.vhd +++ b/basys3/basys3.srcs/ppu.vhd @@ -16,7 +16,7 @@ entity ppu is end ppu; architecture Behavioral of ppu is - constant PPU_FG_SPRITE_COUNT: natural := 1; -- amount of foreground sprites + constant PPU_FG_SPRITE_COUNT: natural := 128; -- amount of foreground sprites constant PPU_COLOR_OUTPUT_DEPTH: natural := 4; -- VGA output channel depth constant PPU_PALETTE_IDX_WIDTH: natural := 3; -- palette index width (within sprite) constant PPU_PALETTE_WIDTH: natural := 3; -- palette index width (palette table) @@ -47,12 +47,6 @@ architecture Behavioral of ppu is FAM_WEN, PAL_WEN, AUX_WEN: out std_logic; -- write enable MUX - TMM_DI: out std_logic_vector(PPU_TMM_DATA_WIDTH-1 downto 0); -- TMM write DATA MUX - BAM_DI: out std_logic_vector(PPU_BAM_DATA_WIDTH-1 downto 0); -- BAM write DATA MUX - FAM_DI: out std_logic_vector(PPU_FAM_DATA_WIDTH-1 downto 0); -- FAM write DATA MUX - PAL_DI: out std_logic_vector(PPU_PAL_DATA_WIDTH-1 downto 0); -- PAL write DATA MUX - AUX_DI: out std_logic_vector(PPU_AUX_DATA_WIDTH-1 downto 0); -- AUX write DATA MUX - EN: in std_logic; -- EXT *ADDR enable (switch *AO to ADDR instead of *AI) ADDR: in std_logic_vector(15 downto 0); -- address in TMM_AI: in std_logic_vector(PPU_TMM_ADDR_WIDTH-1 downto 0); @@ -84,17 +78,30 @@ architecture Behavioral of ppu is douta: out std_logic_vector(PPU_TMM_DATA_WIDTH-1 downto 0); rsta_busy: out std_logic); end component; - component ppu_sprite_bg port( -- background sprite - -- inputs + component ppu_aux port( CLK: in std_logic; -- system clock - OE: in std_logic; -- output enable (of CIDX) - X: in std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); -- current screen pixel x - Y: in std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); -- current screen pixel y + RESET: in std_logic; -- reset memory -- internal memory block (AUX) AUX_WEN: in std_logic; -- VRAM AUX write enable AUX_ADDR: in std_logic_vector(PPU_AUX_ADDR_WIDTH-1 downto 0); -- VRAM AUX address AUX_DATA: in std_logic_vector(PPU_AUX_DATA_WIDTH-1 downto 0); -- VRAM AUX data + + -- aux outputs + BG_SHIFT_X: out std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); + BG_SHIFT_Y: out std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); + FG_FETCH: out std_logic); + end component; + component ppu_sprite_bg port( -- background sprite + -- inputs + CLK: in std_logic; -- system clock + OE: in std_logic; -- output enable (of CIDX) + X: in std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); -- current screen pixel x + Y: in std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); -- current screen pixel y + + -- aux inputs + BG_SHIFT_X: in std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); + BG_SHIFT_Y: in std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); -- used memory blocks BAM_ADDR: out std_logic_vector(PPU_BAM_ADDR_WIDTH-1 downto 0); @@ -108,6 +115,7 @@ architecture Behavioral of ppu is component ppu_sprite_fg port( -- foreground sprite -- inputs CLK: in std_logic; -- system clock + RESET: in std_logic; -- reset internal memory OE: in std_logic; -- output enable (of CIDX) X: in std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); -- current screen pixel x Y: in std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); -- current screen pixel y @@ -176,11 +184,11 @@ architecture Behavioral of ppu is signal FAM_AI, FAM_AO: std_logic_vector(PPU_FAM_ADDR_WIDTH-1 downto 0); signal PAL_AI, PAL_AO: std_logic_vector(PPU_PAL_ADDR_WIDTH-1 downto 0); signal AUX_AI, AUX_AO: std_logic_vector(PPU_AUX_ADDR_WIDTH-1 downto 0); - signal TMM_DI, TMM_DO: std_logic_vector(PPU_TMM_DATA_WIDTH-1 downto 0); - signal BAM_DI, BAM_DO: std_logic_vector(PPU_BAM_DATA_WIDTH-1 downto 0); - signal FAM_DI, FAM_DO: std_logic_vector(PPU_FAM_DATA_WIDTH-1 downto 0); - signal PAL_DI, PAL_DO: std_logic_vector(PPU_PAL_DATA_WIDTH-1 downto 0); - signal AUX_DI, AUX_DO: std_logic_vector(PPU_AUX_DATA_WIDTH-1 downto 0); + signal TMM_DO: std_logic_vector(PPU_TMM_DATA_WIDTH-1 downto 0); + signal BAM_DO: std_logic_vector(PPU_BAM_DATA_WIDTH-1 downto 0); + signal FAM_DO: std_logic_vector(PPU_FAM_DATA_WIDTH-1 downto 0); + signal PAL_DO: std_logic_vector(PPU_PAL_DATA_WIDTH-1 downto 0); + signal AUX_DO: std_logic_vector(PPU_AUX_DATA_WIDTH-1 downto 0); signal CIDX: std_logic_vector(PPU_PALETTE_CIDX_WIDTH-1 downto 0); signal BG_EN: std_logic; signal FG_EN, FG_HIT: std_logic_vector(PPU_FG_SPRITE_COUNT-1 downto 0); @@ -188,6 +196,9 @@ architecture Behavioral of ppu is signal Y: std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); -- current screen pixel y signal TR,TG,TB: std_logic_vector(PPU_COLOR_OUTPUT_DEPTH-1 downto 0); -- tiny RGB out (to be buffered) signal PREADY: std_logic; -- current pixel color stable + signal BG_SHIFT_X: std_logic_vector(PPU_POS_H_WIDTH-1 downto 0); + signal BG_SHIFT_Y: std_logic_vector(PPU_POS_V_WIDTH-1 downto 0); + signal FG_FETCH: std_logic; begin SYSCLK <= CLK100; SYSRST <= RESET; @@ -201,11 +212,6 @@ begin EN => EN, WEN => WEN, ADDR => ADDR, - TMM_DI => TMM_DI, - BAM_DI => BAM_DI, - FAM_DI => FAM_DI, - PAL_DI => PAL_DI, - AUX_DI => AUX_DI, TMM_AI => TMM_AI, BAM_AI => BAM_AI, FAM_AI => FAM_AI, @@ -227,7 +233,7 @@ begin rsta => SYSRST, wea => (others => BAM_WEN), addra => BAM_AO, - dina => BAM_DI, + dina => DATA(PPU_BAM_DATA_WIDTH-1 downto 0), douta => BAM_DO, rsta_busy => open); tilemap_memory: component ppu_tmm port map( @@ -235,18 +241,27 @@ begin rsta => SYSRST, wea => (others => TMM_WEN), addra => TMM_AO, - dina => TMM_DI, + dina => DATA(PPU_TMM_DATA_WIDTH-1 downto 0), douta => TMM_DO, rsta_busy => open); + aux: component ppu_aux port map( + CLK => SYSCLK, + RESET => SYSRST, + AUX_WEN => AUX_WEN, + AUX_ADDR => AUX_AO, + AUX_DATA => DATA(PPU_AUX_DATA_WIDTH-1 downto 0), + BG_SHIFT_X => BG_SHIFT_X, + BG_SHIFT_Y => BG_SHIFT_Y, + FG_FETCH => FG_FETCH); + background_sprite: component ppu_sprite_bg port map( CLK => SYSCLK, OE => BG_EN, X => X, Y => Y, - AUX_WEN => AUX_WEN, - AUX_ADDR => AUX_AO, - AUX_DATA => AUX_DI, + BG_SHIFT_X => BG_SHIFT_X, + BG_SHIFT_Y => BG_SHIFT_Y, BAM_ADDR => BAM_AI, BAM_DATA => BAM_DO, TMM_ADDR => TMM_AI, @@ -256,13 +271,14 @@ begin foreground_sprites: for FG_IDX in 0 to PPU_FG_SPRITE_COUNT-1 generate foreground_sprite: component ppu_sprite_fg port map( CLK => SYSCLK, + RESET => SYSRST, OE => FG_EN(FG_IDX), X => X, Y => Y, - FETCH => '0', + FETCH => FG_FETCH, FAM_WEN => FAM_WEN, FAM_ADDR => FAM_AO, - FAM_DATA => FAM_DI, + FAM_DATA => DATA(PPU_FAM_DATA_WIDTH-1 downto 0), TMM_ADDR => TMM_AI, TMM_DATA => TMM_DO, CIDX => CIDX, @@ -280,7 +296,7 @@ begin RESET => SYSRST, PAL_WEN => PAL_WEN, PAL_ADDR => PAL_AO, - PAL_DATA => PAL_DI, + PAL_DATA => DATA(PPU_PAL_DATA_WIDTH-1 downto 0), R => TR, G => TG, B => TB); 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