QEMU
MicroPython
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QEMU | MicroPython | |
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189 | 197 | |
9,220 | 18,277 | |
2.2% | 1.3% | |
10.0 | 9.8 | |
5 days ago | 5 days ago | |
C | C | |
GNU General Public License v3.0 or later | MIT |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
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.
QEMU
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Autoconf makes me think we stopped evolving too soon
A better solution is just to write a plain ass shell script that tests if various C snippets compile.
https://github.com/oilshell/oil/blob/master/configure
https://github.com/oilshell/oil/blob/master/build/detect-pwe...
Not an unholy mix of m4, shell, and C, all in the same file.
---
These are the same style as a the configure scripts that Fabrice Bellard wrote for tcc and QEMU.
They are plain ass shell scripts, because he actually understands the code he writes.
https://github.com/qemu/qemu/blob/master/configure
https://github.com/TinyCC/tinycc/blob/mob/configure
OCaml’s configure script is also “normal”.
You don’t have to copy and paste thousands of lines of GNU stuff that you don’t understand.
(copy of lobste.rs comment)
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WASM Instructions
Related:
A fast Pascal (Delphi) WebAssembly interpreter:
https://github.com/marat1961/wasm
WASM-4:
https://github.com/aduros/wasm4
Curated list of awesome things regarding WebAssembly (wasm) ecosystem:
https://github.com/mbasso/awesome-wasm
Also, it would be nice if there was a WASM (soft) CPU for QEMU, which (if it existed!) would go here:
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Revng translates (i386, x86-64, MIPS, ARM, AArch64, s390x) binaries to LLVM IR
> architectural registers are always updated
In tiny code, the guest registers (global TCG variables) are stored in the host's registers until you either call an helper which can access the CPU state or you return (`git grep la_global_sync`). This is the reason why QEMU is not so terribly slow.
But after a check, this also happens when you access the guest memory address space! https://github.com/qemu/qemu/blob/master/include/tcg/tcg-opc... (TCG_OPF_SIDE_EFFECTS is what matters)
But still, in the end, it's the same problem. What QEMU does, can be done in LLVM too. You could probably be more efficient in LLVM by using the exception handling mechanism (invoke and friends) to only serialize back to memory when there's an actual exception, at the cost of higher register pressure. More or less what we do here: https://rev.ng/downloads/bar-2019-paper.pdf
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Multipass: Ubuntu Virtual Machines Made Easy
Some of these tools include Oracle VM VirtualBox (that I've used since before the acquisition of Sun Microsystems by Oracle), VMWare Workstation Player, and QEMU, but last year, I found out about Multipass.
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Libsodium: A modern, portable, easy to use crypto library
For C/C++ projects that use meson as the build system, there is an excellent way to manage dependencies:
https://mesonbuild.com/Wrapdb-projects.html
https://mesonbuild.com/Wrap-dependency-system-manual.html
meson will download and build the libraries automatically and give you a variable which you pass as a regular dependency into the built target:
https://github.com/qemu/qemu/tree/005ad32358f12fe9313a4a0191...
https://github.com/harfbuzz/harfbuzz/tree/main/subprojects
https://github.com/harfbuzz/harfbuzz/blob/37457412b3212463c5...
Or, if you're using proper operating systems, they're managed by the usual package manager, just like everything else.
- Show HN: I'm 17 and wrote this guide on how CPUs run programs
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UTM for Developers
In this tutorial, we set up macOS and Windows virtual machines on UTM, a macOS application that provides a GUI wrapper for QEMU, a powerful open-source emulator and virtualizer. UTM allows you to easily manage and run virtual machines without memorizing complex commands. It also has special handling for macOS, making it simpler to install compared to other virtual machine software.
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Replace Docker Desktop with Podman in OSX
On Mac, each Podman machine is backed by a QEMU based virtual machine. Once installed, the podman command can be run directly from the Unix shell in Terminal, where it remotely communicates with the podman service running in the Machine VM.
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VGA & RISCV: How do initialize vga in qemu-system-riscv64 ?
QEMU's "VGA" device is a typical PCI VGA adapter with Bochs SVGA extensions. First enumerate PCI so you can figure out how to talk to the device's I/O, then follow the Bochs SVGA specifications to write a driver. There's also some information on the wiki, although it seems to make a few x86-specific assumptions.
The links I gave you explain how to interact with it. This page explains how the Bochs SVGA registers are mapped in PCI devices. This page explains what the Bochs SVGA registers do. This page gives examples for how to use a Bochs SVGA device.
MicroPython
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RustPython
Just putting my hand up to say that MicroPython is awesome (and runs on the RP2040). https://micropython.org
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Lilygo T-Deck: 2.8-inch IPS LCD display, mini keyboard, and ESP32 processor
Gah, I just ordered one on impulse [1]. I've wanted to build out a WiFi PDA for quite some time now and I like this hardware.
I'm quite liking the idea of running tulip MicroPython [2] on it, or going back to pure MicroPython [3] and writing some drivers. Apparently something like ampy can be used to upload/download Python files [4].
Threads could be quite exciting for running multiple programs at once [5], although I have no idea what it means for two programs to fight over GPIO! It does seem as though MicroPython can only utilise a single core [6].
[1] https://www.lilygo.cc/products/t-deck?variant=43087936487605
[2] https://github.com/bwhitman/tulipcc/tree/main/tulip/tdeck
[3] https://docs.micropython.org/en/latest/esp32/tutorial/intro....
[4] https://www.digikey.co.uk/en/maker/projects/micropython-basi...
[5] https://docs.micropython.org/en/latest/library/_thread.html
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MicroPython VS PikaPython - a user suggested alternative
2 projects | 25 Dec 2023
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CAN Bus with MicroPython
There is some work to implement a common CAN interface in micropython but it's some way off yet: https://github.com/micropython/micropython/pull/13149
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Show HN: MicroLua – Lua for the RP2040 Microcontroller
https://github.com/raspberrypi/pico-sdk/ links to a PDF about connecting to the interwebs with a pi pico.
micropython/micropython//ports/rp2/boards/RPI_PICO_W: https://github.com/micropython/micropython/tree/master/ports...
raspberrypi/pico-sdk /lib: btstack, cyw43-driver, lwip, mbedtls, tinyusb https://github.com/raspberrypi/pico-sdk/tree/master/lib
raspberrypi/pico-examples//pico_w/wifi/access_point/picow_access_point.c:
https://github.com/raspberrypi/pico-examples/blob/master/pic...
There's an iperf opkg pkg, or is it just netperf (which works with fluent)?
raspberrypi/pico-examples//pico_w/wifi/iperf/picow_iperf.c:
I favor micropython[0]. Besides being Python, which I prefer, it actually runs on m68k and RISC-V.
- WebUSB Support for RP2040
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New Functionality: Bluetooth for Raspberry Pi Pico W
This is the PR where the work is being merged into ‘upstream’ micropython for those who are interested. I have been following this side February. Very interesting to see https://github.com/micropython/micropython/pull/10739
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Makefile vs Cmake - Objective comparison ?
On a larger project like this, it generally feels like new build features that take any of us a couple of hours to get working in make, might take a couple of days to replicate on cmake. One recent example of this is build variants: https://github.com/micropython/micropython/pull/9056
- Question about programming arduino
What are some alternatives?
UTM - Virtual machines for iOS and macOS
circuitpython - CircuitPython - a Python implementation for teaching coding with microcontrollers
TinyGo - Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.
PlatformIO - Your Gateway to Embedded Software Development Excellence :alien:
esp-idf - Espressif IoT Development Framework. Official development framework for Espressif SoCs.
TermuxArch - Experience the pleasure of the Linux command prompt in Android, Chromebook, Fire OS and Windows on smartphone, smartTV, tablet and wearable https://termuxarch.github.io/TermuxArch/
Unicorn Engine - Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc, PowerPC, RiscV, S390x, TriCore, X86)
Espruino - The Espruino JavaScript interpreter - Official Repo
jerryscript - Ultra-lightweight JavaScript engine for the Internet of Things.
IronPython - Implementation of Python 3.x for .NET Framework that is built on top of the Dynamic Language Runtime.
awesome-embedded-rust - Curated list of resources for Embedded and Low-level development in the Rust programming language
Vagrant - Vagrant is a tool for building and distributing development environments.