- 1 year ago
Cross-compiling baremetal Rust for Raspberry Pi 3 B from Windows
Cross-compiling baremetal Rust for Raspberry Pi 3 B from Windows requires setting up a suitable development environment, configuring the Rust toolchain for cross-compilation, and writing the appropriate linker script. Here's a step-by-step guide to help you get started:
Install the Required Tools:
Install the ARM toolchain: Download the ARM GNU Embedded Toolchain for Windows from the ARM website (https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads). Extract the archive to a directory, and add the
bin
folder to your system PATH.Install Rust: Install Rust on your Windows machine by downloading and running the official installer from https://www.rust-lang.org/tools/install.
Create a New Rust Project:
- Create a new Rust project using the Cargo tool:sql
cargo new your_project_name --bin
cd your_project_name
- Create a new Rust project using the Cargo tool:
Configure the Cargo.toml File:
- In the
Cargo.toml
file, specify the target triple for Raspberry Pi 3 B:css[target.arm-unknown-none]
rustflags = ["-C", "link-arg=-Tlinker.ld"]
- In the
Create a Linker Script:
- Create a file named
linker.ld
in your project's root directory and define the memory layout for Raspberry Pi 3 B. You can find sample linker scripts online or customize one according to your needs. Here's a simple example:cssMEMORY
{
FLASH : ORIGIN = 0x80000, LENGTH = 0x100000
RAM : ORIGIN = 0x100000, LENGTH = 0x40000
}
ENTRY(main);
SECTIONS
{
.text : { *(.text .text.*) } > FLASH
.rodata : { *(.rodata .rodata.*) } > FLASH
.data : { *(.data .data.*) } > RAM
.bss : { *(.bss .bss.*) } > RAM
}
- Create a file named
Set the Rust Environment Variables:
- Open a Command Prompt and set the following environment variables:bash
set RUST_TARGET_PATH=path/to/your_project_name
set CARGO_INCREMENTAL=0
- Open a Command Prompt and set the following environment variables:
Build the Project:
- Build your Rust project for the target:css
cargo build --target=arm-unknown-none
- Build your Rust project for the target:
Deploy to Raspberry Pi:
- Copy the compiled binary (found in the
target/arm-unknown-none/debug
directory) to your Raspberry Pi using any preferred method (e.g., SCP, SFTP).
- Copy the compiled binary (found in the
Please note that cross-compiling for baremetal targets can be more involved than standard cross-compilation for an OS. You may need to handle low-level hardware initialization, such as setting up the stack, initializing peripherals, etc. Also, the example linker script provided above is simplistic, and you may need to adjust it based on your specific requirements.
For a more complete baremetal example for Raspberry Pi, you can check out the "cortex-m-quickstart" repository (https://github.com/rust-embedded/cortex-m-quickstart) and adapt it for Raspberry Pi 3 B.