Content in ROM

[Altera_Forum]

Hi guys. 

 I am having problem with my assignment. In my assignment I have ROM. I have used lpm rom in megawizard and load the .mif file. I want to check the content in my ROM exactly same with my expect. I am not sure either this waveform is show the correct same as content in my ROM. The content in my ROM have value 0 and 128. For address 0=> 128. Address 1=> 128. Could somebody help me either my waveform is same as mif file or not? And I want to display on VGA monitor with defining if the value is 128, the color display is white. While if the value is 0, the color is black. How can I do that?

[Altera_Forum]

It would help if you showed some code 

Is the .mif file correct and formatted correctly? Have you got a VGA controller?

[Altera_Forum]

Thanks Tricky for your respond.  

 Yes. I already did the .mif file. The .mif file contained decimal number 128 and 0. I already got the VGA controller. Here is my coding. The problem is the FPGA seems not read in this part "IF (Q = "10000000")". It only display black color which is in when Q=0. I define when Q =128 (decimal) the RGB will set as white color and when Q = 0, the RGB will set as black color.    LIBRARY ieee; USE ieee.std_logic_1164.all;   ENTITY hw_image_generator IS  GENERIC(  pixels_y : INTEGER := 478; --row that first color will persist until  pixels_x : INTEGER := 478); --column that first color will persist until   PORT(  disp_ena : IN STD_LOGIC; --display enable ('1' = display time, '0' = blanking time)  row : IN INTEGER; --row pixel coordinate  column : IN INTEGER; --column pixel coordinate  red : OUT STD_LOGIC_VECTOR(7 DOWNTO 0) := (OTHERS => '0'); --red magnitude output to DAC  green : OUT STD_LOGIC_VECTOR(7 DOWNTO 0) := (OTHERS => '0'); --green magnitude output to DAC  blue : OUT STD_LOGIC_VECTOR(7 DOWNTO 0) := (OTHERS => '0'); --blue magnitude output to DAC    Q : in std_logic_vector (7 downto 0)); END hw_image_generator;  ARCHITECTURE behavior OF hw_image_generator IS   begin PROCESS(disp_ena, row, column, Q)  BEGIN   IF(disp_ena = '1') THEN --display time  IF(row < pixels_y AND column < pixels_x) THEN  IF (Q = "10000000") THEN  red <= (OTHERS => '1');----white  green <= (OTHERS => '1') ;---white  blue <= (OTHERS => '1');---white  ELSE  red <= (OTHERS => '0');  green <= (OTHERS => '0') ;  blue <= (OTHERS => '0');  END IF;  ELSE  red <= (OTHERS => '0');  green <= (OTHERS => '1');  blue <= (OTHERS => '0');  END IF;  ELSE --blanking time  red <= (OTHERS => '0');  green <= (OTHERS => '1');  blue <= (OTHERS => '0');  END IF;    END PROCESS; END behavior;

[Altera_Forum]

have you got a testbench for your design? 

Have you simulated it?

[Altera_Forum]

No I am still not have testbench. Should I have it? Sorry if the question seems stupid. Thanks for your respond.

[Altera_Forum]

If you had a testbench, debugging would be much simpler and quicker.