VGA Contoller

[Sander Odekerken]

Hi everybody,

I'm a student and for a project at school we have to make a VGA controller.
Does anyone have a good customizable example or does anyone know where to
download one? What do I have to do if I want to make one of my own.

The input datawidth = 16 bit & the target device is a Xilinx Spartan IIE
FPGA.

Thanks in advance,

Sander Odekerken

 

[Symon]

Hi Sander,
Your teacher's picked a good project! Try Googling for vga.pdf from
xess.com. (Search for 'vga.pdf', it's the first Google result.)
That helps you wire it up.

Then this might help you with frequencies...

TABLE 1 VGA CORE VIDEO MODES
IBM Standard Modes
Mode Type Display Alpha. Res. Colors Vert. Horz.
Pix Clk
0, 1 A/N 40 x 25 8 x 8 320 x 200 16 70 Hz 31.778 kHz
25.175 MHz
2, 3 A/N 80 x 25 8 x 8 640 x 200 16 70 Hz 31.778 kHz
25.175 MHz
0*, 1* A/N 40 x 25 8 x 14 320 x 350 16 70 Hz 31.778 kHz
25.175 MHz
2*, 3* A/N 80 x 25 8 x 14 640 x 350 16 70 Hz 31.778 kHz
25.175 MHz
0+, 1+ A/N 40 x 25 9 x 16 360 x 400 16 70 Hz 31.778 kHz
28.322 MHz
2+, 3+ A/N 80 x 25 9 x 16 720 x 400 16 70 Hz 31.778 kHz
28.322 MHz
4, 5 APA - - 320 x 200 4 70 Hz 31.778 kHz
25.175 MHz
6 APA - - 640 x 200 2 70 Hz 31.778 kHz
25.175 MHz
7 A/N 80 x 25 9 x 14 720 x 350 Mono 70 Hz 31.778 kHz
28.322 MHz
7+ A/N 80 x 25 9 x 16 720 x 400 Mono 70 Hz 31.778 kHz
28.322 MHz
D APA - - 320 x 200 16 70 Hz 31.778 kHz
25.175 MHz
E APA - - 640 x 200 16 70 Hz 31.778 kHz
25.175 MHz
F APA - - 640 x 350 Mono 70 Hz 31.778 kHz
25.175 MHz
10 APA - - 640 x 350 16 70 Hz 31.778 kHz
25.175 MHz
11 APA - - 640 x 480 2 60Hz 31.778 kHz
25.175 MHz
12 APA - - 640 x 480 16 60Hz 31.778 kHz
25.175 MHz
13 APA - - 320 x 200 256 70 Hz 31.778 kHz
25.175 MHz
Enhanced Modes
18 A/N 132 x 44 8 x 8 1056 x 352 Mono 70 Hz 30.5 kHz
40.00 MHz
19 A/N 132 x 25 8 x 14 1056 x 350 Mono 70 Hz 30.5 kHz
40.00 MHz
1A A/N 132 x 28 8 x 13 1056 x 364 Mono 70 Hz 30.5 kHz
40.00 MHz
22 A/N 132 x 44 8 x 8 1056 x 352 16 70 Hz 30.5 kHz
40.00 MHz
23 A/N 132 x 25 8 x 14 1056 x 350 16 70 Hz 30.5 kHz
40.00 MHz
24 A/N 132 x 28 8 x 13 1056 x 364 16 70 Hz 30.5 kHz
40.00 MHz
25 APA - - 640 x 480 16 72 Hz 38.7 kHz
32.512 MHz
26 A/N 80 x 60 8 x 8 640 x 480 16 60 Hz 31.5 kHz
28.322 MHz
29 APA - - 800 x 600 16 60 Hz 38.0 kHz
40.00 MHz
2A A/N 100 x 40 8 x 15 800 x 600 16 60 Hz 38.0 kHz
40.00 MHz
2D APA - - 640 x 350 256 70 Hz 31.5 kHz
25.175 MHz
2E APA - - 640 x 480 256 60 Hz 31.5 kHz
25.175 MHz
30 APA - - 800 x 600 256 60 Hz 38.0 kHz
40.00 MHz
37 APA - - 1024 x 768 16 60 Hz 49.9 kHz
65.00 MHz
NTSC Modes - CCIR 601 Data Rates
3# A/N 80 x 25 9 x 16 640 x 480 16 60 Hz 15.73 kHz
27 MHz
12# APA - - 640 x 480 16 60Hz 15.73 kHz
27 MHz
PAL Modes - CCIR 601 Data Rates
3@ A/N 80 x 25 9 x 16 640 x 480 16 50 Hz 15.62 kHz
27 MHz
12@ APA - - 640 x 480 16 50Hz 15.62 kHz
27 MHz

good luck with it, Syms.


"Sander Odekerken" <sander.odekerken@lycos.nl> wrote in message
news:c4v3h8$93g$1@news2.tilbu1.nb.home.nl...

Hi everybody,

I'm a student and for a project at school we have to make a VGA
controller.
Does anyone have a good customizable example or does anyone know where to
download one? What do I have to do if I want to make one of my own.

The input datawidth = 16 bit & the target device is a Xilinx Spartan IIE
FPGA.

Thanks in advance,

Sander Odekerken

 

[Hendra Gunawan]

"Sander Odekerken" <sander.odekerken@lycos.nl> wrote in message
news:c4v3h8$93g$1@news2.tilbu1.nb.home.nl...

I'm a student and for a project at school we have to make a VGA
controller.
Does anyone have a good customizable example or does anyone know where to
download one?

www.engr.sjsu.edu/crabill
Click on Lab 4 files. One of the verilog files is a video timing controller
(VTC).

More details on that at http://www.engr.sjsu.edu/crabill/projects/vtc/

What do I have to do if I want to make one of my own.

I think his codes are self explanatory. You can customize his code by
changing the resolution, refresh rate etc.

The input datawidth = 16 bit & the target device is a Xilinx Spartan IIE
FPGA.

Incidentaly, the input datawidth for the VTC is 16 bits and I have used this
VTC for Xilinx Spartan IIE and it worked.

Hendra

 

[Hendra Gunawan]

"Sander Odekerken" <sander.odekerken@lycos.nl> wrote in message
news:c4v3h8$93g$1@news2.tilbu1.nb.home.nl...

I'm a student and for a project at school we have to make a VGA
controller.
Does anyone have a good customizable example or does anyone know where to
download one?

www.engr.sjsu.edu/crabill
Click on Lab 4 files. One of the verilog files is a video timing controller
(VTC).

More details on that at http://www.engr.sjsu.edu/crabill/projects/vtc/

What do I have to do if I want to make one of my own.

I think his codes are self explanatory. You can customize his code by
changing the resolution, refresh rate etc.

The input datawidth = 16 bit & the target device is a Xilinx Spartan IIE
FPGA.

Incidentaly, the input datawidth for the VTC is 16 bits and I have used this
VTC for Xilinx Spartan IIE and it worked.

Hendra