draw lines, circles, squares on FPGA by mouse and display on VGA ( not use NIOS)

hi !
im from vietnam . my english is not good , i hope you can understand
what i say . thanks !
i have project to graduate university .
my project is draw circle , line , triagle in FPGA , display on VGA
( only use verilog , don't use C) . i have many problems , and time is
running out . if you have data , code about it , please help me.
....
thanks you so much !

lexuancong <lexuancong252@gmail.com> wrote:

> im from vietnam . my english is not good , i hope you 
> can understand what i say . thanks !

> i have project to graduate university .
> my project is draw circle , line , triagle in FPGA , display on VGA
> ( only use verilog , don't use C) . i have many problems , and time is
> running out . if you have data , code about it , please help me.
> ....

I don't have any code, but the usual VGA display logic takes a
block of memory and writes that out repeatedly.  If you don't need
color, write the same to all three outputs.

Then you have to figure out how to get the shapes drawn into memory.

As it doesn't change, easiest is to load it in a a constant (ROM)
that you have to somehow generate.  You can write a ROM initialization
table in any language, then translate that to verilog.

But first you need the display logic.  You need a high speed
clock, a row counter, and column counter.  You need to generate
the syncronization pulses of the appropriate width and length.

That is as close as I can give now.

-- glen

lexuancong wrote:
> i have project to graduate university .
> my project is draw circle , line , triagle in FPGA , display on VGA
> ( only use verilog , don't use C) . i have many problems , and time is

The "video controller" section of Opencores has some VGA controllers 
source code.
http://opencores.org/projects

There is a line drawing implementation in VHDL.
http://opencores.org/project,graphicsaccelerator

(I've never tried these projects, so I don't know how useful they are.)

Hope this helps,
  Jean-Marc
-- 
http://www.cod5.org

On Wed, 02 Nov 2011 00:25:33 -0700, lexuancong wrote:

> hi !
> im from vietnam . my english is not good , i hope you can understand
> what i say . thanks !
> i have project to graduate university . my project is draw circle , line
> , triagle in FPGA , display on VGA ( only use verilog , don't use C) . i
> have many problems , and time is running out . if you have data , code
> about it , please help me. ....
> thanks you so much !

First get your FPGA so that it generates valid VGA sync signals (and a 
pixel clock, if VGA needs that).  Once you've done that, then do some bog-
simple thing with your pixel generator, like putting out eight white 
pixels followed by eight black ones -- that should give you vertical 
stripes on the screen, to show progress.  Then figure out how to read 
pixels out of memory.  Finally, stuff the memory with your circles, lines 
and squares.

Do you have any friends in the class who are similarly bogged down?  
Helping one another isn't a bad idea.

I don't know how your prof is planning on grading things, but if this 
were a US university, getting partial functionality is going to be better 
than nothing -- a C isn't as good as an A, but it's a lot better than a D 
or an F!

-- 
www.wescottdesign.com

lexuancong wrote:

> my project is draw circle , line , triagle in FPGA , display on VGA
> ( only use verilog , don't use C) . i have many problems , and time is
> running out . if you have data , code about it , please help me.

I have implemented a VGA signal generator, line drawing and bit-blitting
in VHDL:

http://www.frank-buss.de/yagraphcon/index.html

You could take a look at it, try to understand how it works (with
ModelSim you can even single-step the VHDL code and watching how the
registers changes) and then try to implement it yourself in Verilog. For
circles there is a modified Bresenham algorithm. Triangles are trivial,
if you don't need to fill it. If you need filled polygons, it gets a bit
more interesting.

-- 
Frank Buss, http://www.frank-buss.de
piano and more: http://www.youtube.com/user/frankbuss

On Wednesday, 2 November 2011 17:25:33 UTC+10, lexuancong  wrote:
> hi !
> 
> im from vietnam . my english is not good , i hope you can understand
> 
> what i say . thanks !
> 
> i have project to graduate university .
> 
> my project is draw circle , line , triagle in FPGA , display on VGA
> 
> ( only use verilog , don't use C) . i have many problems , and time is
> 
> running out . if you have data , code about it , please help me.
> 
> ....
> 
> thanks you so much !

Hi I am in the same situation with the same project. can u please help me

On 16.10.2013 09:39, ajbhavana89@gmail.com wrote:

>> i have project to graduate university .
>> my project is draw circle , line , triagle in FPGA , display on VGA
>> ( only use verilog , don't use C) . i have many problems , and time is
>> running out . if you have data , code about it , please help me.

> Hi I am in the same situation with the same project. can u please help me

Implement a simple CPU on the FPGA and do the drawing
in software.

W dniu 2013-10-16 13:10, Herbert Kleebauer pisze:
> On 16.10.2013 09:39, ajbhavana89@gmail.com wrote:
>
>>> i have project to graduate university .
>>> my project is draw circle , line , triagle in FPGA , display on VGA
>>> ( only use verilog , don't use C) . i have many problems , and time is
>>> running out . if you have data , code about it , please help me.
>
>> Hi I am in the same situation with the same project. can u please help me
>
> Implement a simple CPU on the FPGA and do the drawing
> in software.
>
>
>

Have fun.

Adam

ajbhavana89@gmail.com wrote:
> On Wednesday, 2 November 2011 17:25:33 UTC+10, lexuancong  wrote:

(snip)
 
>> i have project to graduate university .
>> my project is draw circle , line , triagle in FPGA , display on VGA
>> ( only use verilog , don't use C) . i have many problems , and time is
>> running out . if you have data , code about it , please help me.

The usual way to run a VGA display is in raster mode reading from
a display RAM. First write the code for that.

Then write code to load the appropriate shapes into memory.
(First clear it to background color.)

That should be a relatively simple state machine, though the easier
way is probably to build a simple processor and execute compiled
C code. (Or some other language.)

-- glen

On Wednesday, November 2, 2011 2:25:33 AM UTC-5, lexuancong wrote:
> hi !
> 
> im from vietnam . my english is not good , i hope you can understand
> 
> what i say . thanks !
> 
> i have project to graduate university .
> 
> my project is draw circle , line , triagle in FPGA , display on VGA
> 
> ( only use verilog , don't use C) . i have many problems , and time is
> 
> running out . if you have data , code about it , please help me.
> 
> ....
> 
> thanks you so much !


I think you need to turn in code, diagram, all in paper right?

If so you can do searchig on net, some folks here are really good help

On the basic, you need a cpu, a video frame buffer (sram, sdram, ...) that can hold let say 640 x 480 pixels vga...
And your FPGA is the center of this project, you use the fpga to glue all together and to make them to work

The cpu somehow needs to take the mouse input to generate pixel data and write it to the buffer  

On the other hand, the FPGA has to read the data out from the buffer in raster manner and display it on screen

anyway, this sounds a big project if you do it all by yourself, unless you already had some support

your professor must be the first one to ask...what have he taught you, what hints he can suggest, what evaluation board available etc...