More flexible linker support & running from flash

esp-rs / esp32-hal

A hardware abstraction layer for the esp32 written in Rust.

Apache License 2.0

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More flexible linker support & running from flash #16

Closed arjanmels closed 4 years ago

arjanmels commented 4 years ago

Added ability to use flash/read-only code and data. (This requires usage of a 2nd stage bootloader)
Updated flash script to be able to use bootloader
Added support for RTC memories (and prepared support for external memory)
Added #[ram] attribute to force placement of data in certain type of memory
Added example to showcase #[ram] attribute

This builds on #11, which should be merged first. It also relies on a pull request of the xtensa-lx6-rt crate: https://github.com/esp-rs/xtensa-lx6-rt/pull/10

arjanmels commented 4 years ago

This one is now based on #15. It also relies on a pull request of the xtensa-lx6-rt crate: esp-rs/xtensa-lx6-rt#10. (It could be that the commit hash in Cargo.toml needs to be updated once the xtensa-lx6-rt is merged.)

arjanmels commented 4 years ago

Rebased again after small fixes: This one is now based on #15. It also relies on a pull request of the xtensa-lx6-rt crate: esp-rs/xtensa-lx6-rt#10. (It could be that the commit hash in Cargo.toml needs to be updated once the xtensa-lx6-rt is merged.)

arjanmels commented 4 years ago

Uses custom bootloader by default, which initialized External RAM: https://github.com/arjanmels/esp32_bootloader_init_extram
Some minor fixes and improvements

arjanmels commented 4 years ago

Sneaking in some further improvements, while the pull is pending ;-)

arjanmels commented 4 years ago

Rebased on latest master. First the following pull of the xtensa-lx6-rt crate should be done: esp-rs/xtensa-lx6-rt#10.

arjanmels commented 4 years ago

Slipped in one minor improvement in flash script.