Topics created by Andreas Thölking

@Andreas-Thölking I'm not sure Omega2 is the best choice as it doesn't have a video controller, maybe a USB to HDMI/VGA would work.

Nice project idea. But why abandon the Linux OS and all the peripheral drivers and start everything writing from scratch? For the sake of a pure speed advantage or wanting to learn MIPS assembler? I feel like doing a UBoot bootloader + using baremetal C/C++ combination would have very similiar performance and be way more feasable to program. Still as soon as you want something like USB for Audio you probably don't want to re-implement the USB stack and USB peripheral driver from scratch. Or multitasking. (maybe use FreeRTOS on an Omega? ;)) How is data shared between the Omegas? You say you have a 'combined RAM' but the memory / data bus of the Omega isn't exposed? How are they going to have shared memory? As for the video output, I think the fastest way to output the framebuffer would actually be USB because of its highest available bitrate. That's why I started using USB display adapters (here), they have an ok performance for low resolutions (90FPS @ 160 × 144 @ 16bpp) but need substantial optimizations for higher resolutions. I did rendering to SPI displays here. Or: use the even higher-speed Ethernet peripheral and an FPGA to render to a SPI display an HDMI encoder chip write framebuffer into shared RAM or a dedicated RAM which a FPGA renders out The only problem I see with graphics / 3D performance is the missing GPU. Everything has to be done in software. Maybe you can at least accellerate a few 2D operations with DMA acellerated copying though. I was using software-rendered OpenGL here (MESA 3D). The whole thing sounds a like a modern Nintendo64 (64-bit MIPS CPU @ 93.75MHz for game logic, 64-bit Reality Coprocessor @ 62.5MHz as GPU, audio processor, I/O processor, loadable with custom Microcode for programming the rendering stages), just that we have two 580MHz 32-bit MIPS cores now (with a 64-bit DSP). links with it are very welcome Only datasheet of the MT7688 I know of is at https://labs.mediatek.com/en/chipset/MT7688 and https://docs.labs.mediatek.com/resource/linkit-smart-7688/en/documentation, I'd gather the rest of peripheral drivers from the linux source code and patches (https://github.com/OnionIoT/source) or other bare-metal implementation (e.g. GPIO) Anyways if you want to work together I'd be a happy about a mail.

OpenWRT 18.06 is the latest stable version. you can tweak it as you want and you will never be disappointed. My Omega is running quite well for 48 hours, make sure to enable Luci in make menuconfig. You can setup all wifi and network interfaces from there. Cheers.

Do you want to send whole framebuffers to the Pi via SPI? That would be a lot of data and FPS would suffer but its possible (and costly). Maybe use a USB GPU like I did? Or if the display doesn't have to be big just use it directly via SPI.