In reply to @miless:matrix.org
Is drone compatible with board-support crates like onebitsy or metro_m4?

I'm trying to build for STM32f469, but I get an error...

error[E0425]: cannot find function `fpu_init` in module `processor`
  --> src/bin/hello-world_stm.rs:34:25
   |
34 |     unsafe { processor::fpu_init(true) };
   |                         ^^^^^^^^ not found in `processor`

For more information about this error, try `rustc --explain E0425`.
error: could not compile `hello-world_stm` due to previous error
error: Recipe `build` failed on line 26 with exit code 101

project is an unchanged version that's generated using

drone new --probe openocd --device stm32f469 --flash-size 2M --ram-size 324K hello-world_stm

In reply to @valff:matrix.org
Absolutely, Cortex-M0+ support is currently in progress. Also there will be support for symmetrical multi-core.

In reply to @mglolenstine:matrix.org

I'm trying to build for STM32f469, but I get an error...

error[E0425]: cannot find function `fpu_init` in module `processor`
  --> src/bin/hello-world_stm.rs:34:25
   |
34 |     unsafe { processor::fpu_init(true) };
   |                         ^^^^^^^^ not found in `processor`

For more information about this error, try `rustc --explain E0425`.
error: could not compile `hello-world_stm` due to previous error
error: Recipe `build` failed on line 26 with exit code 101

project is an unchanged version that's generated using

drone new --probe openocd --device stm32f469 --flash-size 2M --ram-size 324K hello-world_stm

In reply to @grawp:matrix.org
If I remember correctly M0+ does not have atomic instructions required for lockless structures used in Drone? How is it going to work? Thx.

In reply to @mglolenstine:matrix.org
Was there something wrong in the init command?

In reply to @valff:matrix.org
We will have to use critical sections. And for RP2040 I plan to use its custom hardware spinlocks and FIFOs where possible.

error: invalid register `r9`: r9 is used internally by LLVM and cannot be used as an operand for inline asm
   --> /home/void/drone_embedded/drone-cortexm/src/thr/init.rs:176:17
    |
176 |                 out("r9") _,
    |                 ^^^^^^^^^^^

In reply to @mglolenstine:matrix.org
A random, probably stupid question...
Would Atmega328p CPUs be supported?
They're running 8bit RISC CPU architecture...

AVR is kinda supported by Rust (https://www.avr-rust.com/) but supporting AVR MCUs does not make sense IMHO:

• They are not debuggable with any of standard tools both on HW and SW side.
• Most of them (my personal opinion is all) are legacy MCUs which are usually several times more expensive than nearest M0(+) counterparts which are still an order of magnitude more capable.
• And finding them in stock is going to be harder and harder.

MGlolenstine:
Btw. don't be fooled by the name Arduino. It means many thing. There are
"many" Arduino boards with CortexM3/4 based micrcontroller
e.g. https://store.arduino.cc/products/arduino-nano-33-ble

There are many non-Arduino-HW boards which can run the Arduino libraries and be used with Arudino text editor (it's not really an IDE) which are also based on various architectures like AVR, ARM, and I think also RISC-V based architectures.

In reply to @mglolenstine:matrix.org
https://paste.centos.org/view/4ca9293a
I'm having slight feelings of deprecation in drone-os.
I'm wondering what I can do about it.
Is the best way just pulling the repos and adding
use alloc::boxed::Box; to every file?