FPGA-based GPU and sprite engine with burst optimized design, implemented across several FPGA platforms and memory systems.
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I'm building a GPU to learn about FPGAs, high speed memories, bus access arbitration, PCI express, etc. Basically all the hard things that surround "okay it does some math."
I find it easier to flesh out HaD project pages when the projects are finished. So for now, this project page serves as a sort of progress log.
Update: still learning, still making, uploaded a bunch of progress photos.
I've been making progress, I figured I'd dump some photos here for now. Not ready for a writeup yet. Converted design to a sprite engine which supports rasterization.
Messed around with bus priority on the SRAM and SDRAM, tweaked the JTAG command batch and sleep time.
Need to stick some FIFOs on the memory ports.
I figured if I had the GPU use the SDRAM, and let the display scan out of SRAM, I could avoid bottlenecks for display scanout. But there's still contention to copy from SDRAM to SRAM when the framebuffer is dirty, and if I let the LCD scanout have bus priority it takes a good 5 seconds per frame update..
Going to try inserting a FIFO into the display scanner that charges from SRAM,, with the display running at a fraction of the speed of the memory bus.
Update: With a scanline buffer it's significantly faster but still has a bit of a boxcar effect.
update: fixed the tearing a bit:
Porting the GPU over to the DE2-115 so I can have a 32 bit SDRAM bus. New display, 24BPP, but it's not self-scan. Will need to add a scanline fifo that is filled often enough for the display to be scanned out while the GPU masters the bus.
more device bitmap testing, fixed some batch issues, learned how to use signaltap, fixed some synchronization bugs, added a fifo for the gpu for less sleep() guesswork on the client side.
Software gradients being assisted by hardware color fills.
Tonight I improved software batch performance over JTAG and wrote some eye candy. Tested the hardware color fill and BLT paths, device bitmaps, etc.
Truly but I am beginner and so I need it once again in form of points. Please do needful
Can you send me the component list for this project on this email id shrivardhan2011@hotmail.com
I can, but given that I list everything on the page...
Ian Hanschen
Truly but I am beginner and so I need it once again in form of points. Please do needful