rpi-open-firmware
clocky
rpi-open-firmware | clocky | |
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6 | 2 | |
1,117 | 0 | |
- | - | |
0.0 | 10.0 | |
about 2 years ago | over 1 year ago | |
C | Go | |
GNU General Public License v3.0 or later | - |
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rpi-open-firmware
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Considerations for a long-running Raspberry Pi
Comment by the developer who attempted to create open firmware, https://github.com/christinaa/rpi-open-firmware/issues/37
> a lot of corners were cut to save time leading to what I believe is poor ARMv7+ Cortex IP integration (GIC, TrustZone, etc). So I stopped working on it. If those things were not the case (GIC working, "TZPCs" working, security working as intended, instead of NS forced to high on bridge, at least in my understanding) I would still work on it ...
ARM isn't a second class citizen on this platform, it's a third class citizen since BCM2709 (again this is an opinion) ... the features I wanted to tinker with the most are absent by design (cutting corners) and I'm not willing to resort to SW emulation of them through clever uses of the VPU.
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Microsoft opens sources ThreadX RTOS used in Raspberry Pis
Sure, and it's been done: https://github.com/christinaa/rpi-open-firmware - but that doesn't involve ThreadX source, just some standard reverse engineering work. ThreadX is really the least interesting part of this whole operation in terms of the Raspberry Pi.
It's very cool that ThreadX has been open sourced as it offers an additional battle tested and mature alternative to FreeRTOS for new projects, but in terms of reverse engineering or open sourcing the Raspberry Pi VideoCore blob, it's pretty much a non-event IMO.
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LibreRPi – open source replacements for RPi firmware
I guess you are thinking of this issue:
https://github.com/christinaa/rpi-open-firmware/issues/37
Since then the project moved to a new maintainer (not me), who worked on it slowly but surely. They need new contributors though.
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Using my homemade linux laptop my 70's terminals are able to connect to the interwebs!
They have (https://github.com/christinaa/rpi-open-firmware). The problem is that almost nothing works (no video or even USB). The sequel to "f you, NVIDIA": f you, Broadcom.
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SoftBank's Sale of Arm to Nvidia Collapses, Arm to IPO
> no clue if there's a project to reimplement that
There was! And it even booted Linux in some capacity: https://github.com/christinaa/rpi-open-firmware
> every chip is very different from one another
Eh, the usual embedded SoCs are not that different from each other — ARM GIC, ARM timer, lots of Synopsys Designware crap for SDMMC/XHCI/PCIe/etc.
For many SoCs it's totally feasible to make standards-compliant firmware, e.g. for the Rockchip RK3566 there is https://github.com/jaredmcneill/quartz64_uefi
And SoCs from the networking world (Marvell, NXP) are typically supported by upstream EDK2.
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rpi-open-firmware: open-source VPU side bootloader for Raspberry Pi
from 2018: Is this project dead? KB - No not dead but on hold, see my response · Issue #37
https://github.com/christinaa/rpi-open-firmware/issues/37
clocky
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Considerations for a long-running Raspberry Pi
Just want to shout out to tinygo, for this old Go programmer, it makes working with ESP and friends loads of fun.
Admittedly, reverse engineering a single digit 7-segment LED display wasn’t the best use of my time, but by crikey it was fun.
https://github.com/doctor-eval/clocky
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Taking over a Dead IoT Company
A Raspberry Pi Pico W is a microcontroller (no operating system) that incorporates Wifi. The way it works is you write a program that runs in a loop and talks to the GPIO ports or whatever. It's incredibly simple and it all runs from flash, so no operating system or anything else needed.
I like using TinyGo with these kind of boards so I get concurrency as well, although sadly the Pico W doesn't have Tinygo support yet. With the W versions, once you're connected to WiFi you can poll APIs and do anything else you do on the internet. No OS required!
As an example of a whole, stand-alone program, I wrote a digital clock in TinyGo. https://github.com/doctor-eval/clocky - sadly it can't (yet) connect to the internet so it's running on a pre-W Pico.
What are some alternatives?
tl - The compiler for Teal, a typed dialect of Lua
ESP32-HUB75-MatrixPanel-DMA - An Adafruit GFX Compatible Library for the ESP32, ESP32-S2, ESP32-S3 to drive HUB75 LED matrix panels using DMA for high refresh rates. Supports panel chaining.
aws-graviton-getting-started - Helping developers to use AWS Graviton2 and Graviton3 processors which power the 6th and 7th generation of Amazon EC2 instances (C6g[d], M6g[d], R6g[d], T4g, X2gd, C6gn, I4g, Im4gn, Is4gen, G5g, C7g[d][n], M7g[d], R7g[d]).
vbz-fahrgastinformation
rpi-open-firmware - Open source VPU side bootloader for Raspberry Pi.
go-formatter - A curated list of awesome Go frameworks, libraries and software
videocoreiv - Tools and information for the Broadcom VideoCore IV (RaspberryPi)
Caddy - Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS
quartz64_uefi - EDK2 UEFI for Rockchip RK3566 and RK3568 based SBCs.
cihat - 🥧 View the status of repo checks from an RPi sense hat LED matrix
rpi-open-firmware - Open source VPU side bootloader for Raspberry Pi.
clash - A rule-based tunnel in Go.