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I worked on an ESP32 operating system for the past year (feddit.nl)

submitted 2 days ago* (last edited 2 days ago) by ByteWelder@feddit.nl to c/opensource@lemmy.ml

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The project is called "Tactility" and its website is https://tactility.one/

You can run ELF binary apps directly from an SD card without restarting or flashing the ROM. There's an SDK for building these apps, but I haven't made an official release yet.

I wrote a blog post with some background information: https://bytewelder.com/posts/2025/01/06/tactility-one-year-later.html

Source code and project files: https://github.com/ByteWelder/Tactility

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[-] RobotToaster@mander.xyz 8 points 1 day ago

Is there a reason you didn't use the ESP-S3's MMU? https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/system/mm.html

[-] ByteWelder@feddit.nl 10 points 1 day ago

I didn't know this exists! I'm currently using a dependency to load ELF files: https://components.espressif.com/components/espressif/elf_loader I guess it would make more sense to have the memory mapping done inside elf_loader, so that S3 devices can load to PSRAM and non-S3 devices can load into IRAM. Thanks for the tip!