Which VGA controller is it? Do you have datasheet? Schema of this Spartan 3E board?
The reason you just got 8 colors is becouse VGA signal is analog. Probably your board is making use some resistors to "convert" the digital output of the FPGA to something that can be used on VGA. But this leaves you with just 2 options per color becouse you just can make it high or low. So you got 3 basic colors and 2 options for each: 2^3 = 8 colors. If you want more colors you got find some way to creat an analog signal, or some other step between max and min.
Cya
Why only 2 bits are assigned for blue whereas red and green has 3 bits?
Hi
I have a Spartan 3E board and I am working on a graphics project with the VGA controller. The userguide only mentions that 8 colors are possible. Is there any way I can generate more colors? Please let me know.
Thanks
... If you connect the above schematic to a VGA monitor you destroy it. ...
"Check first" I'd say with anything disparaging about anyone's posts, it's not great if its not accurate, you know... No stress, but you know, nothing beats "doing it" yourselfIf you connect the above schematic to a VGA monitor you destroy it.
There's a method, when clk freq is much higher that usually used on 8 color VGA
what about, ?????
1) Using the RGB on 3 Parralell port peripheral pins and use interupts to send "lists" of 8 pulses per "pixel" to the lines as quick as possible? So the PWM list could be a pallette even to the GDI consumer, or a pallette of 24bit?
The PIC32 I've just looked at will do 80Mhz (I hope on veroboard even)... I must admit I thought some HDL would come in somewhere for a "proper one" but thats something I have no experience of yet at all...
I'm just a bit "put off" by the chip-package, I'll have to get a PicTail too, and I'm only a veroboard engineer at home, no tools for "special" stuff, but we'll have a go eh....
Why not put the effort in?Not much use to put more effort into such a lowtech solution. If you want
Personally I would maybe go to 5 resistors per color, but that's it.
show me yours done and I'll admire it
Why not put the effort in?
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