help regarding error in dct

[kakarala]

hii i am writing a code for 8x8 dct and wrote following code. i am getting the following errors


RROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 45. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 45. parse error, unexpected IDENTIFIER, expecting COMMA or CLOSEPAR
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 45. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 45. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 45. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 46. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 46. parse error, unexpected INTEGER_LITERAL, expecting SEMICOLON
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 46. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 47. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 47. parse error, unexpected IDENTIFIER, expecting COMMA or CLOSEPAR
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 47. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 47. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 47. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 47. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 47. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 47. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 48. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 48. parse error, unexpected INTEGER_LITERAL, expecting SEMICOLON
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 48. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 49. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 49. parse error, unexpected IDENTIFIER, expecting COMMA or CLOSEPAR
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 49. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 49. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 49. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 49. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 50. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 50. parse error, unexpected INTEGER_LITERAL, expecting SEMICOLON
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 50. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 51. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 51. parse error, unexpected IDENTIFIER, expecting COMMA or CLOSEPAR
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 51. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 51. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 51. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 51. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 51. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 56. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 56. parse error, unexpected IDENTIFIER, expecting COMMA or CLOSEPAR
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 56. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 56. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 56. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 57. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 57. parse error, unexpected INTEGER_LITERAL, expecting SEMICOLON
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 57. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 58. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 58. parse error, unexpected IDENTIFIER, expecting COMMA or CLOSEPAR
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 58. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 58. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 58. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 58. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 58. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 58. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 59. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 59. parse error, unexpected INTEGER_LITERAL, expecting SEMICOLON
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 59. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 60. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 60. parse error, unexpected IDENTIFIER, expecting COMMA or CLOSEPAR
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 60. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 60. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 60. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 60. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 61. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 61. parse error, unexpected INTEGER_LITERAL, expecting SEMICOLON
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 61. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 62. Unexpected symbol read: .
ERROR:HDLParsers:164 - "C:/Downloads/Motionestimation/dct.vhd" Line 62. parse error, unexpected IDENTIFIER, expecting COMMA or CLOSEPAR
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 62. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 62. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 62. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 62. Unexpected symbol read: .
ERROR:HDLParsers:163 - "C:/Downloads/Motionestimation/dct.vhd" Line 62. Unexpected symbol read: .


library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
use work.sad.all;

---- Uncomment the following library declaration if instantiating
---- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity dct is
port(
x : in img_array_t(0 to 7,0 to 7);
y : out img_array_t(0 to 7,0 to 7));

end dct;

architecture Behavioral of dct is
signal z :img_array_t(0 to 7,0 to 7);
begin
dct : process
begin
for k in 1 to 7 loop
Z(k,0) <= 23170*(x(k,0)+x(k,1)+x(k,2)+x(k,3)+x(k,4)+x(k,5)+x(k,6)+x(k,7));
Z(k,1) <= 32138*(x(k,0)– x(k,7)) + 27246*(x(k,1) – x(k,6)) + 18205*(x(k,2) – x(k,5)) + 6393*(x(k,3) – x(k,4));
Z(k,2) <= 30274*(x(k,0) + x(k,7)) + 12540*(x(k,1) + x(k,6)) – 12540*(x(k,2) + x(k,5)) – 30274*(x(k,3) + x(k,4));
Z(k,3) <= 27246*(x(k,0) – x(k,7)) – 6393*(x(k,1) – x(k,6)) – 32138*(x(k,2) – x(k,5)) – 18205*(x(k,3) – x(k,4));
Z(k,4) <= 23170*(x(k,0) + x(k,7)) – 2317*(x(k,1) + x(k,6)) – 23170*(x(k,2) + x(k,5)) + 23170*(x(k,3) + x(k,4));
Z(k,5) <= 18205*(x(k,0) – x(k,7)) – 32138*(x(k,1) – x(k,6)) + 6393*(x(k,2) – x(k,5)) + 27246*(x(k,3) – x(k,4));
Z(k,6) <= 12540*(x(k,0) + x(k,7)) – 30274*(x(k,1) + x(k,6)) + 30274*(x(k,2) + x(k,5)) – 12540*(x(k,3) + x(k,4));
Z(k,7) <= 6393*(x(k,0) – x(k,7)) – 18205*(x(k,1) – x(k,6)) + 27246*(x(k,2) – x(k,5)) – 32138*(x(k,3) – x(k,4));

end loop;
for k in 1 to 7 loop
Y(k,0) <= 23170*(z(k,0)+z(k,1)+z(k,2)+z(k,3)+z(k,4)+z(k,5)+z(k,6)+z(k,7));
Y(k,1) <= 32138*(z(k,0) – z(k,7)) + 27246*(z(k,1) – z(k,6)) + 18205*(z(k,2) – z(k,5)) + 6393*(z(k,3) – z(k,4));
Y(k,2) <= 30274*(z(k,0) + z(k,7)) + 12540*(z(k,1) + z(k,6)) – 12540*(z(k,2) + z(k,5)) – 30274*(z(k,3) + z(k,4));
Y(k,3) <= 27246*(z(k,0) – z(k,7)) – 6393*(z(k,1) – z(k,6)) – 32138*(z(k,2) – z(k,5)) – 18205*(z(k,3) – z(k,4));
Y(k,4) <= 23170*(z(k,0) + z(k,7)) – 2317*(z(k,1) + z(k,6)) – 23170*(z(k,2) + z(k,5)) + 23170*(z(k,3) + z(k,4));
y(k,5) <= 18205*(z(k,0) – z(k,7)) – 32138*(z(k,1) – z(k,6)) + 6393*(z(k,2) – z(k,5)) + 27246*(z(k,3) – z(k,4));
y(k,6) <= 12540*(z(k,0) + z(k,7)) – 30274*(z(k,1) + z(k,6)) + 30274*(z(k,2) + z(k,5)) – 12540*(z(k,3) + z(k,4));
y(k,7) <= 6393*(z(k,0) – z(k,7)) – 18205*(z(k,1) – z(k,6)) + 27246*(z(k,2) – z(k,5)) – 32138*(z(k,3) – z(k,4));

end loop;
end process;
end Behavioral;

 

[vipinlal]

Are you sure that you can access the array using the x(k,0) statement. Make sure that it works. If it doesnt work you can use x(k)(0), I think. But right now I am not sure.

Also you can remove the process statement which doesnt have any sensitivity list.

--vipin
https://vhdlguru.blogspot.com/

 

[TrickyDicky]

Are you sure that you can access the array using the x(k,0) statement. Make sure that it works. If it doesnt work you can use x(k)(0), I think. But right now I am not sure.

x(a,b) is the correct syntax for a 2d array type, as is posted in the code. x(a)(b) is the syntax to index into an array of arrays.

As for your other problems:

1. Dont put so much on one line.
2. Get rid of the process. Simulation will loop forever with no results.
2. Go and learn about digital circuits - ie. use a clock. You have no chance of doing what you are trying to do.

 

[Maxwell077]

TrickDick is right, because mentality is different in FPGA.. This is not the way what you want to do..