namniart - Rust on MSP430

Jun 13, 2018 - Rust on MSP430

This is mostly just my collected notes on getting Rust to build code for the MSP430.

I’m building on Ubuntu 14.04 which is quite old, so there are a probably a few quirks in my setup compared to newer Ubuntu or other Linux distributions.

Install MSP430 gcc toolchain: sudo apt-get install binutils-msp430 gcc-msp430 gdb-msp430 msp430-libc msp430mcu mspdebug
I already have rust installed, but I upgraded to nightly rust because the examples only build on nightly:
- rustup install nightly
- rustup default nightly
After googling for msp430 and rust I found msp43-quickstart
- There are some additional instructions in PR #3 that were quite useful. Most of these instructions are borrowed from there.
I installed rust-src: rustup component add rust-src
Installed xargo: cargo install xargo
- Installing xargo from inside the msp430-quickstart project fails. I’m not sure why or how, but it’s trying to pick up settings from that project.
- cd ~, cargo install xargo works.
Cloned msp430-quickstart: git clone https://github.com/japaric/msp430-quickstart.git
cd msp430-quickstart
Tried to build with xargo rustc --target msp430-none-elf --release -- -C link-arg=-Tlink.x -C link-arg=-mmcu=msp430g2553 -C link-arg=-nostartfiles -C linker=msp430-elf-gcc -Z linker-flavor=gcc; failed to find msp430-elf-gcc
- Build command from the msp430_rt crate
My compiler is named msp430-gcc so I created a shell script on my path named msp430-elf-gcc that does exec msp430-gcc "$@"

Retried build. Failed again with:

 note: "msp430-elf-gcc" "-mcpu=msp430" "-c" "-o" "/tmp/xargo.XqgEMtdDHVan/target/msp430-none-elf/release/deps/core-2ec70cc69e40cb54.core0.rcgu.o" "/tmp/xargo.XqgEMtdDHVan/target/msp430-none-elf/release/deps/core-2ec70cc69e40cb54.core0.rcgu.s"
    
 note: Assembler messages:
 Fatal error: unrecognized cpu type msp430

I am not able to find any results online for an error message that matches unrecognized cpu type msp430 but my best guess is that I need a newer version of msp430-gcc

No luck, but it’s time to call it a day. When I come back to this later I’ll probably either try to upgrade to a newer version of Ubuntu (14.04 is ANCIENT!) or look for a PPA that has built a newer version of msp430 gcc for 14.04

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