Dylan McKay

Look into finding a way to not require target specification files

4

Currently, all binaries that use avr-rust need to create a target specification file to instruction Rust to compile for a specific microcontroller. The specification itself is always identical across devices,...

without_interrupts(): Restore previous interrupt state rather than always re-enabling interrupts

3

The `without_interrupts()` in PR #4 always enables interrupts when the closure finishes executing. This could be problematic in libraries; a library using this function assumes that the program it is...

Unified interrupt handler interface

4

CC #9 Our interrupt handler story isn't super great; we require users to write their own interrupt vector table (IVT) in assembly, and then they define a set of `pub...

Currently, the build script has a special case when not targeting AVR; default to atmega328 so that [docs.rs](https://docs.rs/ruduino/0.1.2/ruduino/cores/index.html) can build it. We should build all cores when generating documentation, so...

Come up with some way to instruct LLVM that all PORT/DDR registers are zeroed at startup

3

At the top of `main`, we should be able to assume that all `PORT`/`DDR` registers are zeroed. This should let LLVM optimise RMW OR/AND/NOT instructions into a simple assignment.

Use proper halting sequence for the panic handler

4

Currently the current panic handler simply is `loop { }`. In release builds, this will likely optimize out and it also has problems because interrupts will still execute. We should...

From memory, I think we don't set the status register in all cases we should be doing. I think a bunch of the basic ones work with addition and stuff,...

Update to upstreamed avr rust

2

I get this error locally ``` error: linking with `avr-gcc` failed: exit code: 1 | = note: "avr-gcc" "-Os" "-mmcu=atmega328p" "-T" "lookup-text.ld" "-L" "/home/dylan/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/avr-atmega328p/lib" "/home/dylan/repos/rust-avr-chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-3101ca07c6937603.chip8_avr.122g828f-cgu.0.rcgu.o" "/home/dylan/repos/rust-avr-chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-3101ca07c6937603.chip8_avr.122g828f-cgu.1.rcgu.o" "/home/dylan/repos/rust-avr-chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-3101ca07c6937603.chip8_avr.122g828f-cgu.10.rcgu.o" "/home/dylan/repos/rust-avr-chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-3101ca07c6937603.chip8_avr.122g828f-cgu.11.rcgu.o" "/home/dylan/repos/rust-avr-chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-3101ca07c6937603.chip8_avr.122g828f-cgu.2.rcgu.o" "/home/dylan/repos/rust-avr-chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-3101ca07c6937603.chip8_avr.122g828f-cgu.3.rcgu.o"...

Test AVR against all no_std crates in a Crater run

10

The AVR fork can now fully compile libcore to machine code in all the programs we've tested. It is unclear if there are other, yet unexercised parts of `libcore` that...