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authorlonkaars <loek@pipeframe.xyz>2023-02-20 11:23:30 +0100
committerlonkaars <loek@pipeframe.xyz>2023-02-20 11:23:30 +0100
commitd2eb1cf5055a19f3e276ce737428b06332de63b3 (patch)
treef70c6fc4e29660efa5c4c6ad02c1730c08f0fd19 /basys3/basys3.srcs/ppu_pceg.vhdl
parent9b84c25a53b7269228743e398b13c19af505226b (diff)
rename .vhdl to .vhd
Diffstat (limited to 'basys3/basys3.srcs/ppu_pceg.vhdl')
-rw-r--r--basys3/basys3.srcs/ppu_pceg.vhdl46
1 files changed, 0 insertions, 46 deletions
diff --git a/basys3/basys3.srcs/ppu_pceg.vhdl b/basys3/basys3.srcs/ppu_pceg.vhdl
deleted file mode 100644
index 9675e5b..0000000
--- a/basys3/basys3.srcs/ppu_pceg.vhdl
+++ /dev/null
@@ -1,46 +0,0 @@
-library ieee;
-use ieee.std_logic_1164.all;
---use ieee.numeric_std.all;
-
-entity ppu_pceg is port(
- CLK: in std_logic; -- system clock
- RESET: in std_logic; -- async reset
- SPRITE: out std_logic; -- sprite info fetch + sprite pixel fetch
- COMP_PAL: out std_logic; -- compositor + palette lookup
- DONE: out std_logic); -- last pipeline stage done
-end ppu_pceg;
-
-architecture Behavioral of ppu_pceg is
- constant PPU_PL_TOTAL_STAGES: natural := 14;
-
- type states is (PL_SPRITE, PL_COMP_PAL, PL_DONE);
- signal state: states := PL_SPRITE;
-begin
- -- output drivers
- SPRITE <= CLK when RESET = '0' and state = PL_SPRITE else '0';
- COMP_PAL <= CLK when RESET = '0' and state = PL_COMP_PAL else '0';
- DONE <= '1' when RESET = '0' and state = PL_DONE else '0';
-
- process(CLK, RESET)
- variable CLK_IDX: natural range 0 to PPU_PL_TOTAL_STAGES+1 := 0;
- begin
- if RESET = '1' then
- state <= PL_SPRITE;
- elsif rising_edge(CLK) then
- -- clock counter ranges
- if CLK_IDX < 4 then
- state <= PL_SPRITE;
- elsif CLK_IDX < 5 then
- state <= PL_COMP_PAL;
- else
- state <= PL_DONE;
- end if;
-
- -- increment clock counter
- CLK_IDX := CLK_IDX + 1;
- if CLK_IDX = PPU_PL_TOTAL_STAGES then
- CLK_IDX := 0;
- end if;
- end if;
- end process;
-end Behavioral;