diff options
Diffstat (limited to 'basys3/basys3.srcs/ppu_pceg.vhd')
| -rw-r--r-- | basys3/basys3.srcs/ppu_pceg.vhd | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/basys3/basys3.srcs/ppu_pceg.vhd b/basys3/basys3.srcs/ppu_pceg.vhd index f87c60d..a491244 100644 --- a/basys3/basys3.srcs/ppu_pceg.vhd +++ b/basys3/basys3.srcs/ppu_pceg.vhd @@ -25,9 +25,16 @@ begin SPRITE_FG <= PL_FG_IDLE; DISPCTL_BWEN <= '0'; elsif falling_edge(CLK) then + -- increment clock counter + CLK_IDX := CLK_IDX + 1; + if CLK_IDX = PPU_PCEG_TOTAL_STAGES then + CLK_IDX := 0; + end if; + + CLK_IDX_T <= CLK_IDX; + case CLK_IDX is when 0 => - DISPCTL_BWEN <= '0'; SPRITE_BG <= PL_BG_IDLE; SPRITE_FG <= PL_FG_IDLE; SPRITE_FG_HIT <= PL_HIT_INACCURATE; @@ -38,27 +45,26 @@ begin SPRITE_BG <= PL_BG_BAM_DATA; SPRITE_FG <= PL_FG_TMM_DATA; when 3 => - SPRITE_BG <= PL_BG_TMM_ADDR; + SPRITE_BG <= PL_BG_IDLE; SPRITE_FG <= PL_FG_IDLE; SPRITE_FG_HIT <= PL_HIT_ACCURATE; - when 4 => + when 4 => null; + when 5 => null; + when 6 => + SPRITE_BG <= PL_BG_TMM_ADDR; + when 7 => SPRITE_BG <= PL_BG_TMM_DATA; - when 5 => + when 8 => SPRITE_BG <= PL_BG_IDLE; - when 6 => + when 9 => null; + when 10 => null; + when 11 => DISPCTL_BWEN <= '1'; - when 7 => + when 12 => null; + when 13 => DISPCTL_BWEN <= '0'; when others => null; end case; - - -- increment clock counter - CLK_IDX := CLK_IDX + 1; - if CLK_IDX = PPU_PCEG_TOTAL_STAGES then - CLK_IDX := 0; - end if; - - CLK_IDX_T <= CLK_IDX; end if; end process; end Behavioral; |