rpi-open-firmware
threadx
rpi-open-firmware | threadx | |
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6 | 13 | |
1,117 | 2,431 | |
- | - | |
0.0 | 0.0 | |
about 2 years ago | 4 months ago | |
C | C | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
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Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
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
threadx
- Bill Lamie: Story of a man and his real-time operating systems
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Microsoft opens sources ThreadX RTOS used in Raspberry Pis
It is not open source. The source code is open but with an evaluation, i.e. proprietary license:
https://github.com/azure-rtos/threadx/blob/master/LICENSE.tx...
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Eclipse ThreadX
License looked alright, until I came across this: https://github.com/azure-rtos/threadx/blob/a8e5d0946c31385ff...
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PlatformIO and Zephyr is a bad idea
Portability, mainly. Zephyr runs on a wide variety of architectures and 450+ variations of popular boards are already supported upstream (adding more often being pretty easy). In your particular example, your own preferences with regards to building on top of open-source software may play a role too. For example, Azure RTOS is not open source, and its license will, among other things, prevent you to use it in production on other hardware than what's listed herehere. So easily moving from one hardware vendor / SoC to the other might be a problem, should this be a requirement (and it kind of becomes one for a lot of people in these times if silicon shortage)
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Linux vs. QNX/VxWorks for a climate control system - Education
Honestly as long as you use one of the supported MCU families ThreadX is probably a better choice these days given how much better NetX is over FreeRTOS’ TCP implementation.
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As a guess, what percentage of embedded projects actually need the R in RTOS?
Azure RTOS/ThreadX is only free on approved pre-licensed uCs, but with that said, there's a ton of devices covered by it so it's an option for a lot of projects.
- Using FreeRTOS Compatibility Kit with AZURE RTOS on STM32F7
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What are some cool modern libraries you enjoy using?
I'm interested in something equivalent to tx_byte_pool but for non-embedded usage where I want a custom allocator for defined pools. Do you know if mimalloc can do this? I see it has custom heaps, but I didn't see any functions to create one from raw memory.
- FreeRTos with SMP and the Zynq processor
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Thoughts? They look great though!
source is apparently available but no idea what licensing it uses
What are some alternatives?
tl - The compiler for Teal, a typed dialect of Lua
x-cube-azrtos-h7 - X-CUBE-AZRTOS-H7 (Azure RTOS Software Expansion for STM32Cube) provides a full integration of Microsoft Azure RTOS in the STM32Cube environment for the STM32H7 series of microcontrollers.
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]).
mtkernel_3 - micro T-Kernel 3.0
rpi-open-firmware - Open source VPU side bootloader for Raspberry Pi.
compile-time-regular-expressions - Compile Time Regular Expression in C++
videocoreiv - Tools and information for the Broadcom VideoCore IV (RaspberryPi)
platformio-docs - PlatformIO Documentation
quartz64_uefi - EDK2 UEFI for Rockchip RK3566 and RK3568 based SBCs.
dotfiles - My dotfiles
rpi-open-firmware - Open source VPU side bootloader for Raspberry Pi.
guix - Azure RTOS GUIX Studio provides a complete, embedded graphical user interface (GUI) library and design environment, facilitating the creation and maintenance of all graphical elements needed by your device.