I should interface the my SoC with an HITACHI
SP14Q005 display, 320x240 pixel.

There is someone who could tell me what to do to write text on display?

Marco wrote:
> I should interface the my SoC with an HITACHI SP14Q005 display, 320x240 pixel.
> 
> There is someone who could tell me what to do to write text on display?


http://www.fpga4fun.com/GraphicLCDpanel3.html


rick

I read the article and it is very interesting,
but the code seems to be written in verilog, or pseudi verilog.

Where I can find a brief verilog manual?

To print text on display I need to have font on a
rom.

Could you explain how to create a file to copy into rom?

I'm also interseted in it

I'm writing an VGA display with incorporated ROM font , for test I just 
implemented part of font but in the future I will have to implemente all the 
font so knowing how to generate a file for the rom should be interesting.(I 
have already made a ROM for an altera component with dspbuilder but actually 
I doesn't know how to call a file in HDL and be recognized by xst as a rom)


"Marco" <m...@email.it> a écrit dans le message de news: 
e...@webx.sUN8CHnE...
> To print text on display I need to have font on a rom.
>
> Could you explain how to create a file to copy into rom? 

In what way have you implemented the ROM fonts?
(I'm using Xilinx EDK)

I use xilinx ise foundation

the rom is declared in vhdl
i declare an array that contains contains each symbol of the font
exactely each symbol is reprensated by 8 std_logic of 8 bit
 i adress the rom by the concatenation of the symbol & the 3 lsb of the 
adress of the vertical pointer then i peak the right bit with the 3 lsb of 
horizontal pointer
for example 'A' symbol look like

--A
"00000000", --<< for vertical separation
"00011000",
"00011000",
"00100100",
"00111100",
"01000010",
"01000010",
"00000000",--<< for vertical separation
 ^             ^ for horizontal separation

here is the code: http://kclo4.free.fr/fpga/memoire_alphabet.vhdl

I'm actually remodeling my VGA display when it will be finish i will share 
you the code if you want (in 2/3 days i think)

alexis

"Marco" <m...@email.it> a écrit dans le message de news: 
e...@webx.sUN8CHnE...
> In what way have you implemented the ROM fonts? (I'm using Xilinx EDK) 

I don't know if you are still looking for IP to
write text but I have finish
the pre-version of my VGA display , it takes input smbole code save it into
a rom that save all the caracter code to display on the screen and then
adress the rom with the font
the actual configuration is:
640*480 pixels screen
8*8 pixel caracter (so the screen could display 80*60symbols)
25MHz/pixel

actually not all the font is integrated (only A->Z)
http://kclo4.free.fr/FPGA/vga.zip
here is you could find the *.vhd files the top integrate the display
function called afficheur_vga and dummy for test (DCM for dividing frequency
and others stuff ) the constraint file is for spartan 3 digilent board
if you want to test the design just P&R and program your board
=>reset is the last slide switch
=>the 3 first slide switch are for color of screen
=>the push button are for the are respectevely a, b, c , enter (1sec refresh
frequency, could be change by changing the test value of cpt in top.vhd)

The design is not yet finish because I have to change some little thing as
complet the font, make generic all I can and make a documentation.

Regards

Alexis


"Marco" <m...@email.it> a écrit dans le message de news:
ee8bfb0.-1...@webx.sUN8CHnE...
>I should interface the my SoC with an HITACHI SP14Q005 display, 320x240
>pixel.
>
> There is someone who could tell me what to do to write text on display?