diff options
Diffstat (limited to 'basys3/basys3.srcs/ppu_sprite_bg.vhd')
| -rw-r--r-- | basys3/basys3.srcs/ppu_sprite_bg.vhd | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/basys3/basys3.srcs/ppu_sprite_bg.vhd b/basys3/basys3.srcs/ppu_sprite_bg.vhd index dba5b8e..417210c 100644 --- a/basys3/basys3.srcs/ppu_sprite_bg.vhd +++ b/basys3/basys3.srcs/ppu_sprite_bg.vhd @@ -11,6 +11,7 @@ entity ppu_sprite_bg is port( -- inputs CLK : in std_logic; -- pipeline clock RESET : in std_logic; -- reset clock counter + PL_RESET : in std_logic; -- reset pipeline clock counters 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 @@ -67,8 +68,8 @@ architecture Behavioral of ppu_sprite_bg is begin -- output drivers CIDX <= T_CIDX when OE = '1' else (others => 'Z'); - BAM_ADDR <= R_BAM_ADDR; - TMM_ADDR <= R_TMM_ADDR; + BAM_ADDR <= R_BAM_ADDR when state = PL_BAM_ADDR else (others => 'Z'); + TMM_ADDR <= R_TMM_ADDR when state = PL_TMM_ADDR else (others => 'Z'); T_BAM_DATA <= BAM_DATA; T_TMM_DATA <= TMM_DATA; -- CIDX combination @@ -108,16 +109,18 @@ begin (others => '0') when others; -- state machine (pipeline stage counter) + sync r/w - process(CLK, RESET) + process(CLK, RESET, PL_RESET) begin - if RESET = '1' then + if RESET = '1' or PL_RESET = '1' then -- reset state state <= PL_BAM_ADDR; - -- reset internal pipeline registers - R_BAM_ADDR <= (others => '0'); - R_BAM_DATA <= (others => '0'); - R_TMM_ADDR <= (others => '0'); - R_TMM_DATA <= (others => '0'); + if RESET = '1' then + -- reset internal pipeline registers + R_BAM_ADDR <= (others => '0'); + R_BAM_DATA <= (others => '0'); + R_TMM_ADDR <= (others => '0'); + R_TMM_DATA <= (others => '0'); + end if; elsif rising_edge(CLK) then case state is when PL_BAM_ADDR => |