Custom Firmware for the Xteink X4.

• Rust & cargo
• riscv32 toolchain https://docs.espressif.com/projects/rust/book/getting-started/toolchain.html
• espflash

Since I want to keep the original partition layout but still use the espflash utils, there is run.sh which builds and runs a firmware image.

Can be ran on desktop with cargo run --bin trusty-desktop

Try to put everything in Core, so you can run it on a desktop.

• https://github.com/esp-rs/esp-hal
• https://github.com/sunwoods/Xteink-X4/
• https://github.com/CidVonHighwind/microreader/
• https://www.youtube.com/watch?v=0OMlUCyA_Ys
• https://github.com/HookedBehemoth/microreader/tree/research