littlefs
MicroPython
littlefs | MicroPython | |
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29 | 197 | |
4,769 | 18,387 | |
1.4% | 1.0% | |
8.2 | 9.8 | |
4 days ago | 1 day ago | |
C | C | |
BSD 3-clause "New" or "Revised" License | MIT |
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littlefs
- LittleFS Design (CObW) – Combining advantages of COW and log-structures
- LittleFS Design
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Littlefs – a little fail-safe filesystem designed for microcontrollers
Pointers correctly round-trip through unrelated pointer types, provided the alignment for both types is compatible.
At least one bit does look a bit questionable: lfs_mlist is treated as the common initial sequence of lfs_dir and lfs_file, even though it isn't, and common initial sequences only apply to union fields anyway. Example cast of struct dir * to struct lfs_mlist * (probably valid of itself, assuming the alignment is compatible): https://github.com/littlefs-project/littlefs/blob/c733d9ec57... then use struct dir as if it were actually a struct lfs_mlist: https://github.com/littlefs-project/littlefs/blob/c733d9ec57...
(There's other occurrences of the same kind of thing.)
Strictly speaking, I think this might be unfixable without a bunch of work, but so much stuff does this kind of operation that any compiler that doesn't do what you expect will have been fixed by now. (Assuming you're not one of those people who is going to pop up and tell us with a straight face that what we should expect is for the compiler to do absolutely anything - except, perhaps, for having it generate correct code, which would be defective behaviour that should be eliminated.) Maybe improve the odds by using lfs_mlist as the common initial sequence of both structs, and fingers crossed that the compiler considers the union rules to apply to this case too. Or compile with -fno-strict-aliasing.
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I made a tachometer/hour meter for my outboard engine using the PIO
Also, it looks like you're writing to the flash every second the engine is running. Do you have an idea of what the endurance of that might be? I'm not too familiar with this but supposedly the flash on the Pico is good for at least 100K program/erase cycles and Micropython uses LittleFS on RP2040 which does wear leveling. I looked for more official info and the rp2 port code backs that up with a note: "the flash requires the programming size to be aligned to 256 bytes". And the littlefs readme does say it does wear leveling and other good stuff.
- GitHub - littlefs-project/littlefs: A little fail-safe filesystem designed for microcontrollers
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nRF Connect SDK file writes gives -22 error after many files
Maybe first go and localize which assumption has been voided, i.e. what of the many places in littlefs that raise this error actually raise it? And... erm... what littlefs are you talking about? https://github.com/littlefs-project/littlefs doesn't seem to have a fs_close() function...
- SPI Flash file system vs writing my own fifo?
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Small MicroSD module for project
Rather easy to add LittleFS for file storage onto the NOR flash. https://github.com/littlefs-project/littlefs
- CircuitPython – The easiest way to program microcontrollers
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
[6] https://github.com/micropython/micropython/issues/8197
- MicroPython v1.22.0
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MicroPython VS PikaPython - a user suggested alternative
2 projects | 25 Dec 2023
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about microprocessor
If you really want to engage in the travesty that is shoehorning a high level scripting language into an environment that has 512 bytes of RAM and less clock cycles than an electric toothbrush, there is micropython.
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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:
- WebUSB Support for RP2040
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Ask HN: Embedded Scripting Options for Microcontrollers
Needed for hobby project, maintained by very small team. Haven't decided on specific microcontroller. Needed for general bit-banging, speed and code size are not priorities.
So far have considered MicroPython [0] [1] and Lua [2] [3], but open for suggestions for others.
What are experiences?
[0] https://micropython.org/
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Arduino or python
Python is also a general-purpose programming language. It's typically used on desktop / laptop computers. But Micropython is a variant that can be used to program embedded devices.
What are some alternatives?
spiffs - Wear-leveled SPI flash file system for embedded devices
circuitpython - CircuitPython - a Python implementation for teaching coding with microcontrollers
lvgl - Embedded graphics library to create beautiful UIs for any MCU, MPU and display type.
TinyGo - Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.
zephyr - Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.
PlatformIO - Your Gateway to Embedded Software Development Excellence :alien:
lwext4 - ext2/ext3/ext4 filesystem library for microcontrollers
esp-idf - Espressif IoT Development Framework. Official development framework for Espressif SoCs.
uf2 - UF2 file format specification
Espruino - The Espruino JavaScript interpreter - Official Repo
STORfs - Open source file system for small embedded systems
jerryscript - Ultra-lightweight JavaScript engine for the Internet of Things.