pong game

Altera_Forum · ‎05-23-2011

i tried to run pong game in fpga prototyping with vhdl examples book chapter 13 but i couldn't run that can you help me

Altera_Forum · ‎05-23-2011

not without knowing whats wrong.

Altera_Forum · ‎05-24-2011

i used codes in the book i want to write in the vga pau logo but i couldn't that

Altera_Forum · ‎05-25-2011

Please post the code you're trying to get working, and tell us the errors.

Altera_Forum · ‎05-25-2011

these are codes

library ieee;

use ieee. std_logic_1164. all ;

use ieee. numeric_std. all ;

entity pong_graph_animate is

port (

clk, reset : std_logic ;

btn: std_logic_vector (1 downto 0 ) ;

video_on: in std_logic;

pixel_x , pixel_y : in std_logic_vector ( 9 downto 0) ;

graph_rgb : out std_logic_vector (2 downto 0);

hit:out std_logic;

gra_still: in std_logic;

miss: in std_logic;

graph_on : in std_logic

) ;

end pong_graph_animate ;

architecture arch of pong_graph_animate is

signal refr_tick : std_logic;

--x , y c o o r d i n a t e s (0,0) to ( 639 , 479 )

signal pix_x,pix_y : unsigned ( 9 downto 0) ;

constant MAX_X: integer :=640;

constant MAX_Y: integer:=480;

-- w a l l l e f t , r i g h t b o u n d a r y

constant WALL_X_L : integer :=32 ;

constant WALL_X_R: integer :=35;

-- b a r l e f t , r i g h t b o u n d a r y

constant BAR_X_L: integer :=600;

constant BAR_X_R: integer :=603;

--b a r t o p , b o t t o m b o u n d a r y

signal bar_y_t , bar_y_b : unsigned ( 9 downto 0) ;

constant BAR_Y_SIZE: integer :=72;

-- reg t o t r a c k t o p b o u n d a r y ( x p o s i t i o n is f i x e d )

signal bar_y_reg , bar_y_next : unsigned ( 9 downto 0) ;

-- b a r moving v e l o c i t y when a b u t t o n i s p r e s s e d

constant BAR_V: integer:=4;

-- s q u a r e b a l l

constant BALL_SIZE: integer:=8; -- 8

-- b a l l l e f t , r i g h t b o u n d a r y

signal ball_x_l, ball_x_r : unsigned ( 9 downto 0) ;

-- b a l l t o p , b o t t o m b o u n d a r y

signal ball_y_t , ball_y_b : unsigned (9 downto 0) ;

-- reg t o t r a c k l e f t , t o p b o u n d a r y

signal ball_x_reg , ball_x_next ,ball_vx_reg : unsigned ( 9 downto 0) ;

signal ball_y_reg , ball_y_next ,ball_vy_reg : unsigned ( 9 downto 0) ;

--reg t o t r a c k b a l l s p e e d

signal x_delta_reg , x_delta_next : unsigned ( 9 downto 0 ) ;

signal y_delta_reg , y_delta_next : unsigned ( 9 downto 0 ) ;

-- b a l l v e l o c i t y c a n be p o s o r neg

constant BALL_V_P : unsigned ( 9 downto 0 )

:= to_unsigned ( 2,10) ;

constant BALL_V_N: unsigned ( 9 downto 0)

:= unsigned ( to_signed (-2,10));

-- r o u n d b a l l i m a g e ROM

type rom_type is array (0 to 7 )

of std_logic_vector ( 0 to 7 ) ;

-- ROM d e f i n i t i o n

constant BALL_ROM: rom_type :=

(

"00111100" , -- * * * *

"01111110", -- * * * * * *

"11111111", -- * * * * * * * *

"01111110", -- * * * * * *

"00111100" --* * * *

) ;

signal rom_addr , rom_col : unsigned ( 2 downto 0 ) ;

signal rom_data : std_logic_vector ( 7 downto 0) ;

signal rom_bit : std_logic ;

-- o b j e c t o u t p u t s i g n a l s

signal wall_on ,bar_on , sq_ball_on , rd_ball_on : std_logic ;

signal wall_rgb,bar_rgb , ball_rgb :

std_logic_vector ( 2 downto 0) ;

begin

-- r e g i s t e r s

process ( clk , reset)

begin

if reset = '1' then

bar_y_reg <= ( others => '0' ) ;

ball_x_reg <= ( others => '0' ) ;

ball_y_reg <= ( others => '0' ) ;

x_delta_reg <= ( "0000000100" ) ;

y_delta_reg <= ( "0000000100") ;

elsif( clk'event and clk = '1' ) then

bar_y_reg <= bar_y_next ;

ball_x_reg <= ball_x_next ;

ball_y_reg <= ball_y_next ;

x_delta_reg <= x_delta_next ;

y_delta_reg <= y_delta_next ;

end if ;

end process;

pix_x <= unsigned ( pixel_x ) ;

pix_y <= unsigned ( pixel_y ) ;

refr_tick <= '1' when ( pix_y = 481 ) and (pix_x=0) else

'0';

wall_on <='1' when (WALL_X_L <= pix_x ) and (pix_x<=WALL_X_R) else

'0';

wall_rgb <= "001"; -- b l u e

-- b o u n d a r y

bar_y_t <= bar_y_reg ;

bar_y_b <= bar_y_t + BAR_Y_SIZE - 1;

-- p i x e l w i t h i n b a r

bar_on <=

'1' when (BAR_X_L<=pix_x) and (pix_x<=BAR_X_R) and

(bar_y_t <= pix_y ) and ( pix_y <= bar_y_b ) else

'0' ;

-- b a r r g b o u t p u t

bar_rgb <= "001" ; --green

-- new b a r y - p o s i t i o n

process ( bar_y_reg , bar_y_b , bar_y_t , refr_tick , btn)

begin

bar_y_next <= bar_y_reg ; -- no move

if refr_tick = '1' then

if btn (1) = '1' and bar_y_b<(MAX_Y-1-BAR_V) then

bar_y_next <= bar_y_reg + BAR_V; -- move down

elsif btn ( 0 ) = '1'and bar_y_t > BAR_V then

bar_y_next <= bar_y_reg - BAR_V ; -- move up

end if;

end process;

-- s q u a r e b a l l

-- b o u n d a r y

ball_x_l <= ball_x_reg ;

ball_y_t <= ball_y_reg ;

ball_x_r <= ball_x_l + BALL_SIZE - 1;

ball_y_b <= ball_y_t + BALL_SIZE - 1;

-- p i x e l w i t h i n b a l l

sq_ball_on <=

'1' when ( ball_x_l <= pix_x ) and ( pix_x <= ball_x_r ) and

( ball_y_t <= pix_y ) and ( pix_y <= ball_y_b ) else

'0' ;

-- map c u r r e n t p i x e l l o c a t i o n t o ROM a d d r / c o l

rom_addr <= pix_y(2 downto 0) - ball_y_t(2 downto 0 ) ;

rom_col <= pix_x(2 downto 0 ) - ball_x_l(2 downto 0 ) ;

rom_data <= BALL_ROM(to_integer(rom_addr));

rom_bit <= rom_data(to_integer(rom_col));

-- p i x e l w i t h i n b a l l

rd_ball_on<='1'when (sq_ball_on='1') and (rom_bit='1') else

'0' ;

ball_rgb <= "100" ; -- red

ball_x_next <=

to_unsigned((MAX_X)/2,10) when gra_still='1' else

ball_x_reg + ball_vx_reg when refr_tick='1' else

ball_x_reg ;

ball_y_next <=

to_unsigned((MAX_Y)/2,10) when gra_still='1' else

ball_y_reg + ball_vy_reg when refr_tick='1' else

ball_y_reg ;

process ( ball_vx_reg , ball_vy_reg , ball_y_t,ball_x_l, ball_x_r ,

ball_y_t,ball_y_b,bar_y_t,bar_y_b,gra_still,hit,miss)

begin

hit <= '0' ;

miss <= '0' ;

ball_vx_next <= ball_vx_reg;

ball_vy_next <= ball_vy_reg;

if gra_still= '1' then -- i n i t i a 1 v e 1 o c i t y

ball_vx_next <= BALL_V_N;

ball_vy_next <= BALL_V_P;

elsif ball_y_t < 1 then

ball_vy_next <= BALL_V_P;

elsif ball_y_b > (MAX_Y-1) then -- r e a c h b o t t o m

ball_vy_next <= BALL_V_N;

elsif ball_x_1 <= WALL_X_R then -- r e a c h w a l l

ball_vx_next <= BALL_V_P; -- b o u n c e b a c k

elsif (BAR-X-L <=ball-x-r) and (ball-x-r <=BAR-X-R) and

(bar_y_t<=ball_y_b) and (ball_y_t<=bar_y_b) then

-- r e a c h x of r i g h t b a r , a h i t

ball_vx_next <= BALL_V_N; -- b o u n c e b a c k

hit <= '1';

elsif (ball_x_r>MAX_X) then --r e a c h r i g h t b o r d e r

miss <= '1' ; -- a mi s s

end if ;

end process ;

graph_on <= wall_on or bar_on or rd_ball_on;

process(video_on,wall_on,bar_on,rd_ball_on,

wall_rgb, bar_rgb, ball_rgb)

begin

if video_on='0' then

graph_rgb <= "000" ; --blank

else

if wall_on = '1' then

graph_rgb <= wall_rgb;

elsif bar_on = '1' then

graph_rgb<= bar_rgb ;

elsif rd_ball_on = '1' then

graph_rgb <= ball_rgb;

else

graph_rgb <= "110"; -- y e l l o w background

end if ;

end process ;

end arch;

errors

can't write to interface object ''miss'' of mode IN

interface object ''hit''of mode out cannot be read.change object mode to buffer

i added the hit:out std_logic, gra_still: in std_logic, miss: in std_logic, graph_on : in std_logic

error can be from this

Altera_Forum · ‎05-25-2011

I think your error is self explanitory.

You cannot write to an input port. You need to make it an output.

Also, outputs cannot be read internally. Either make it a buffer (like it suggests) or use an internal signal.

Altera_Forum · ‎01-07-2013

--- Quote Start ---

I think your error is self explanitory.

You cannot write to an input port. You need to make it an output.

Also, outputs cannot be read internally. Either make it a buffer (like it suggests) or use an internal signal.

--- Quote End ---

" I have tried to run the above code but and they are executing successfully , the problem that is not that how do I assign the pins, auto assigning the pin gives a wrong output and when using the DE1 pin assignment how do i change the name as there is discrepancy in naming system "

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