diff options
| author | lonkaars <loek@pipeframe.xyz> | 2023-03-08 17:31:53 +0100 |
|---|---|---|
| committer | lonkaars <loek@pipeframe.xyz> | 2023-03-08 17:31:53 +0100 |
| commit | d35688314dbd531437edda6c78674c24ef2e1207 (patch) | |
| tree | 52babacec96c038e9df676e4f8988eefe52533ef /basys3/basys3.srcs/ppu_consts.vhd | |
| parent | 77090b9a6a9052848ccf233a8f8bee59418da0d8 (diff) | |
WIP dispctl
Diffstat (limited to 'basys3/basys3.srcs/ppu_consts.vhd')
| -rw-r--r-- | basys3/basys3.srcs/ppu_consts.vhd | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/basys3/basys3.srcs/ppu_consts.vhd b/basys3/basys3.srcs/ppu_consts.vhd index 48fab5a..c140b98 100644 --- a/basys3/basys3.srcs/ppu_consts.vhd +++ b/basys3/basys3.srcs/ppu_consts.vhd @@ -50,6 +50,25 @@ package ppu_consts is constant PPU_TMM_CACHE_FETCH_A_WIDTH : natural := ceil_log2(PPU_TMM_CACHE_FETCH_A_COUNT); constant PPU_ACCURATE_FG_SPRITE_COUNT : natural := 16; constant PPU_PL_TOTAL_STAGES : natural := 14; + -- VGA signal timings (https://tomverbeure.github.io/video_timings_calculator) + constant PPU_VGA_H_ACTIVE : natural := PPU_NATIVE_SCREEN_WIDTH; + constant PPU_VGA_H_PORCH_FRONT : natural := 16; + constant PPU_VGA_H_SYNC : natural := 64; + constant PPU_VGA_H_PORCH_BACK : natural := 80; + constant PPU_VGA_H_BLANK : natural := PPU_VGA_H_PORCH_FRONT + PPU_VGA_H_SYNC + PPU_VGA_H_PORCH_BACK; + constant PPU_VGA_H_TOTAL : natural := PPU_VGA_H_BLANK + PPU_VGA_H_ACTIVE; + constant PPU_VGA_V_ACTIVE : natural := PPU_NATIVE_SCREEN_HEIGHT; + constant PPU_VGA_V_PORCH_FRONT : natural := 3; + constant PPU_VGA_V_SYNC : natural := 4; + constant PPU_VGA_V_PORCH_BACK : natural := 13; + constant PPU_VGA_V_BLANK : natural := PPU_VGA_V_PORCH_FRONT + PPU_VGA_V_SYNC + PPU_VGA_V_PORCH_BACK; + constant PPU_VGA_V_TOTAL : natural := PPU_VGA_V_BLANK + PPU_VGA_V_ACTIVE; + constant PPU_VGA_SIGNAL_PIXEL_IDX_MAX : natural := PPU_VGA_V_TOTAL * PPU_VGA_H_TOTAL; -- horizontal and vertical pixel clock index + constant PPU_VGA_SIGNAL_PIXEL_WIDTH : natural := ceil_log2(PPU_VGA_SIGNAL_PIXEL_IDX_MAX); -- bit width to count total horizontal and vertical pixel clock index + constant PPU_SCREEN_T_POS_X_WIDTH : natural := ceil_log2(PPU_SCREEN_WIDTH); + constant PPU_SCREEN_T_POS_Y_WIDTH : natural := ceil_log2(PPU_SCREEN_HEIGHT); + constant PPU_SCREEN_N_POS_X_WIDTH : natural := ceil_log2(PPU_NATIVE_SCREEN_WIDTH); + constant PPU_SCREEN_N_POS_Y_WIDTH : natural := ceil_log2(PPU_NATIVE_SCREEN_HEIGHT); end package ppu_consts; package body ppu_consts is -- https://stackoverflow.com/questions/21783280/number-of-bits-to-represent-an-integer-in-vhdl |