Emuflight 1.0.0 master rust

[saidinesh5]

Here's a pull request for how to get started with Rust Integration in EmuFlight 1.0.0 . The code size is still slightly higher (~1kb) But overall, the integration was smooth. The idea is we move more and more functions to the rustemu crate (and delete them from the C codebase)

To test this out,

• Make sure you have Rust installed ( https://www.rust-lang.org/tools/install )

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

• Restart the terminal to make sure your PATH variable can use the rustup command and make sure to install the bare metal arm toolchain for rust installed:

rustup target add thumbv7em-none-eabihf

• Then you can build emuflight using the regular Makefile

make TARGET=STM32F411

Let me know if there are any issues, so I can fix them before this is merged.

[nerdCopter]

@saidinesh5 , does make EXTRA_FLAGS=-Werror test-all work for you locally? This may or may not be external to the rust mods.

[saidinesh5]

@nerdCopter this is weird error still. Makefile automatically deciding to compile the generated rustemu.h and failing..

$ make EXTRA_FLAGS=-Werror test-all
make: *** No rule to make target 'test-all'.  Stop.

[nerdCopter]

without rust installed locally, i do sill have the test-all rule; albeit failing obviously

## emuflight-1.0.0-master-rust
$ make EXTRA_FLAGS=-Werror test-all
cd src/test && make test-all
make[1]: Entering directory '/media/disk2/SYNC/nerdCopter-GIT/EmuFlight_nerdRepo/src/test'
Falling back to 'clang'.
CC version: Debian clang version 11.0.1-2 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin
CXX version: Debian clang version 11.0.1-2 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin
compiling ../main/sensors/boardalignment.c 
compiling ../main/common/sensor_alignment.c 
compiling ../main/common/maths.c 
cd ../../src/rustemu && cargo +nightly build --release
/bin/sh: 1: cargo: not found
make[1]: *** [Makefile:682: ../../src/rustemu/target/x86_64-unknown-linux-gnu/release/librustemu.a] Error 127
make[1]: Leaving directory '/media/disk2/SYNC/nerdCopter-GIT/EmuFlight_nerdRepo/src/test'
make: *** [Makefile:715: test-all] Error 2

[saidinesh5]

Yeah you need to install rust first. It is complaining about missing cargo command. For me locally the rust side builds just fine. the tests are another story though

[Quick-Flash]

@nerdCopter what would it take to get this merged? This I do believe would become a big point that would help separate us from other firmware.