picodvi
gplgpu
picodvi | gplgpu | |
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30 | 5 | |
195 | 630 | |
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0.0 | 0.0 | |
over 3 years ago | over 9 years ago | |
C | VHDL | |
BSD 3-clause "New" or "Revised" License | GNU General Public License v3.0 only |
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picodvi
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FuryGpu – Custom PCIe FPGA GPU
The RP2040 is a great MCU for playing with graphics as it can bit bang VGA and DVI/HDMI. There's some info on the DVI here: https://github.com/Wren6991/PicoDVI
I wrote a couple of articles on how to do bit banged VGA on the RP2040 from scratch: https://gregchadwick.co.uk/blog/playing-with-the-pico-pt5/ and https://gregchadwick.co.uk/blog/playing-with-the-pico-pt6/ plus an intro to PIO https://gregchadwick.co.uk/blog/playing-with-the-pico-pt4/
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Video Game Module for Flipper Zero
A few years back someone was bit banging DVI and 720p 30fps video straight off the RP2040 GPIO pins with just inline resistors between not and the HDMI cable.
https://github.com/Wren6991/PicoDVI
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VGA driver using PIO and DMA on the RP2040
I have the Adafruit DVI board and have been hacking on it some. It's more fun than should be allowed.
There's a project to get this running using Rust[1]. Currently it outputs the blue channel with sync, but has trouble with the other two channels. I don't have a hardware lab with scope, logic analyzer, etc., so it's not easy for me to debug.
In the meantime, I've been doing some experiments in the C codebase as well[2], mostly in the direction of proportionally spaced bitmap text, using the fonts in the X11 distribution.
[1]: https://github.com/DusterTheFirst/pico-dvi-rs
[2]: https://github.com/Wren6991/PicoDVI/pull/48
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Recommend MCU with dual USB - one host and one device IF?
There is even bit-banged DVI library for pico.
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Show HN: PicoVGA Library – VGA/TV Display on Raspberry Pi Pico
Apparently, there is a digital video output project for the RP2040 already out there [0]! As for why digital video is more rare, it is because the common digital video formats are higher bandwidth and require higher signal integrity.
[0] https://github.com/Wren6991/PicoDVI
- Fast algorithm to scale a image
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Least resourceful 18 year old air defense ukrainian soldier with basic coding abilities
I've seen people implement DVI with PIO, and I'm sure basic missile commands wouldn't be as bandwidth-intensive as that.
- Is a Raspberry Pi Pico able to play video on a spi-tft screen?
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Help understanding current-mode and TMDS logic in DIV/HDMI.
For example this guy (https://github.com/Wren6991/PicoDVI) essentially 'bit bangs' CML. Sure its not a completely compliant implementation, but it's pretty close... In his case using a push pull with 3.3V/0V. I don't know how he's getting a 0.8V swing.
- Bitbanged DVI on the RP2040 Microcontroller
gplgpu
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FuryGpu – Custom PCIe FPGA GPU
> There's no open hardware GPU to speak of. Depending on license (can't find information?), this could be the first, and a starting point for more.
There's this which is about the same kind of GPU
https://github.com/asicguy/gplgpu
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Why is it bad to do floating point operations on FPGA?
If you learn better by looking at code, you can look at some Floating point work in my GPLGPU: https://github.com/asicguy/gplgpu/tree/master/hdl/math It's in verilog and has examples of adds, multiplies and reciprocals. Note that it's not fully 100% IEEE compliant. It doesn't handle NAN, +/- infinity. Happy to answer questions, but it'll be intermittent as I'm heading to Vietnam and China for vacation.
- Exploring FPGA Graphics
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FPGA for graphics processing?
If you want to see how GPUs were designed in the late 90's check out my github repo: https://github.com/asicguy/gplgpu It's a VGA/ 2D/ 3D chip (pre shaders) from about 1998 ported to an FPGA.
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Homebrew ray tracing GPU
Impressive work. PM me if you'd like any help on your project as it looks pretty cool. I've got 30 years experience in high speed FPGA/ ASIC design as well as some early graphics work: https://github.com/asicguy/gplgpu
What are some alternatives?
pico-examples
FPGA_DisplayPort - An implementation of DisplayPort protocol for FPGAs
pico-sdk
projf-explore - Project F brings FPGAs to life with exciting open-source designs you can build on.
Gert-VGA-666 - Resources for Gert VGA 666
verilog-pcie - Verilog PCI express components
showmewebcam - Raspberry Pi + High Quality Camera = High-quality USB Webcam!
Arduino_STM32 - Arduino STM32. Hardware files to support STM32 boards, on Arduino IDE 1.8.x including LeafLabs Maple and other generic STM32F103 and STM32F407 boards.
pico-zxspectrum - ZX Spectrum for Raspberry Pico Pi RP2040
Arduino_STM32 - Arduino STM32. Hardware files to support STM32 boards, on Arduino IDE 1.8.x including LeafLabs Maple and other generic STM32F103 boards
vga-rpi - VGA interface using Raspberry Pi as a PCXT graphics card emulator
esp-idf - Espressif IoT Development Framework. Official development framework for Espressif SoCs.