diff options
Diffstat (limited to 'basys3/basys3.srcs/ppu_sprite_bg_tb.vhd')
| -rw-r--r-- | basys3/basys3.srcs/ppu_sprite_bg_tb.vhd | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/basys3/basys3.srcs/ppu_sprite_bg_tb.vhd b/basys3/basys3.srcs/ppu_sprite_bg_tb.vhd index 2dee2fe..65da15c 100644 --- a/basys3/basys3.srcs/ppu_sprite_bg_tb.vhd +++ b/basys3/basys3.srcs/ppu_sprite_bg_tb.vhd @@ -59,13 +59,34 @@ begin TMM_DATA => TMM_DATA, CIDX => CIDX); - BAM_DATA <= std_logic_vector(to_unsigned(16#4814#, PPU_BAM_DATA_WIDTH)); -- hex((1 << 14) | (0 << 13) | (2 << 10) | (20 << 0)) - TMM_DATA <= std_logic_vector(to_unsigned(16#ffff#, PPU_TMM_DATA_WIDTH)); + -- inputs + -- BAM_DATA -> FLIP_H + palette index 2 + tilemap index 10 + -- TMM_DATA -> all pixels color 7 + -- X -> 25 + -- Y -> 60 + -- BG_SHIFT_X -> 3 + -- BG_SHIFT_Y -> 3 + BAM_DATA <= 15x"4814"; -- hex((1 << 14) | (0 << 13) | (2 << 10) | (20 << 0)) + TMM_DATA <= 15x"7e3f"; -- hex(0x7fff & ~(0b111 << 6)) X <= std_logic_vector(to_unsigned(25, PPU_POS_H_WIDTH)); Y <= std_logic_vector(to_unsigned(60, PPU_POS_V_WIDTH)); BG_SHIFT_X <= std_logic_vector(to_unsigned(3, PPU_POS_H_WIDTH)); BG_SHIFT_Y <= std_logic_vector(to_unsigned(3, PPU_POS_V_WIDTH)); + -- expected outputs: + -- absolute pixel coordinates -> (28, 63) + -- absolute background canvas tile index coordinates -> (1, 3) + -- tile index -> 3 * 40 + 1 = 121 + -- BAM_ADDR => 121 (OK) + -- sprite local coordinates -> (12, 15) + -- transformed local coordinates -> (12, 0) (apply FLIP_H) + -- pixel index -> 0 * 16 + 12 = 12 + -- pixel word address -> 52 * 20 + 12//5 -> 1042 + -- TMM_ADDR => 1042 (OK) + -- pixel bits -> [pixel n+] = 12 % 5 = 2 -> 8 downto 6 + -- cidx should be -- (2 << 3) | (0 << 0) = 16 + -- CIDX => 16 (OK) + tb : process begin for i in 0 to 32 loop |