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@@ -18,20 +18,6 @@ defmt = "0.3.8"
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defmt-rtt = "0.4.1"
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defmt-rtt = "0.4.1"
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embedded-hal = "1.0.0"
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embedded-hal = "1.0.0"
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# Uncomment for the panic example.
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# panic-itm = "0.4.1"
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# Uncomment for the allocator example.
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# alloc-cortex-m = "0.4.0"
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# Uncomment for the device example.
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# Update `memory.x`, set target to `thumbv7em-none-eabihf` in `.cargo/config`,
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# and then use `cargo build --example device` to build it.
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# [dependencies.stm32f3]
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# features = ["stm32f303", "rt"]
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# version = "0.7.1"
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# this lets you use `cargo fix`!
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[[bin]]
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[[bin]]
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name = "test-cargo"
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name = "test-cargo"
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test = false
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test = false
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@@ -1,138 +0,0 @@
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# `cortex-m-quickstart`
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> A template for building applications for ARM Cortex-M microcontrollers
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This project is developed and maintained by the [Cortex-M team][team].
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## Dependencies
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To build embedded programs using this template you'll need:
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- Rust 1.31, 1.30-beta, nightly-2018-09-13 or a newer toolchain. e.g. `rustup
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default beta`
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- The `cargo generate` subcommand. [Installation
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instructions](https://github.com/ashleygwilliams/cargo-generate#installation).
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- `rust-std` components (pre-compiled `core` crate) for the ARM Cortex-M
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targets. Run:
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``` console
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$ rustup target add thumbv6m-none-eabi thumbv7m-none-eabi thumbv7em-none-eabi thumbv7em-none-eabihf
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```
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## Using this template
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**NOTE**: This is the very short version that only covers building programs. For
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the long version, which additionally covers flashing, running and debugging
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programs, check [the embedded Rust book][book].
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[book]: https://rust-embedded.github.io/book
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0. Before we begin you need to identify some characteristics of the target
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device as these will be used to configure the project:
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- The ARM core. e.g. Cortex-M3.
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- Does the ARM core include an FPU? Cortex-M4**F** and Cortex-M7**F** cores do.
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- How much Flash memory and RAM does the target device has? e.g. 256 KiB of
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Flash and 32 KiB of RAM.
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- Where are Flash memory and RAM mapped in the address space? e.g. RAM is
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commonly located at address `0x2000_0000`.
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You can find this information in the data sheet or the reference manual of your
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device.
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In this example we'll be using the STM32F3DISCOVERY. This board contains an
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STM32F303VCT6 microcontroller. This microcontroller has:
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- A Cortex-M4F core that includes a single precision FPU
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- 256 KiB of Flash located at address 0x0800_0000.
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- 40 KiB of RAM located at address 0x2000_0000. (There's another RAM region but
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for simplicity we'll ignore it).
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1. Instantiate the template.
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``` console
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$ cargo generate --git https://github.com/rust-embedded/cortex-m-quickstart
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Project Name: app
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Creating project called `app`...
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Done! New project created /tmp/app
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$ cd app
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```
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2. Set a default compilation target. There are four options as mentioned at the
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bottom of `.cargo/config`. For the STM32F303VCT6, which has a Cortex-M4F
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core, we'll pick the `thumbv7em-none-eabihf` target.
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``` console
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$ tail -n9 .cargo/config.toml
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```
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``` toml
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[build]
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# Pick ONE of these compilation targets
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# target = "thumbv6m-none-eabi" # Cortex-M0 and Cortex-M0+
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# target = "thumbv7m-none-eabi" # Cortex-M3
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# target = "thumbv7em-none-eabi" # Cortex-M4 and Cortex-M7 (no FPU)
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target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
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# target = "thumbv8m.base-none-eabi" # Cortex-M23
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# target = "thumbv8m.main-none-eabi" # Cortex-M33 (no FPU)
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# target = "thumbv8m.main-none-eabihf" # Cortex-M33 (with FPU)
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```
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3. Enter the memory region information into the `memory.x` file.
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``` console
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$ cat memory.x
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/* Linker script for the STM32F303VCT6 */
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MEMORY
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{
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/* NOTE 1 K = 1 KiBi = 1024 bytes */
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FLASH : ORIGIN = 0x08000000, LENGTH = 256K
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RAM : ORIGIN = 0x20000000, LENGTH = 40K
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}
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```
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4. Build the template application or one of the examples.
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``` console
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$ cargo build
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```
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## VS Code
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This template includes launch configurations for debugging CortexM programs with Visual Studio Code located in the `.vscode/` directory.
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See [.vscode/README.md](./.vscode/README.md) for more information.
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If you're not using VS Code, you can safely delete the directory from the generated project.
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# License
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This template is licensed under either of
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- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
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http://www.apache.org/licenses/LICENSE-2.0)
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- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
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at your option.
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## Contribution
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Unless you explicitly state otherwise, any contribution intentionally submitted
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for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
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dual licensed as above, without any additional terms or conditions.
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## Code of Conduct
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Contribution to this crate is organized under the terms of the [Rust Code of
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Conduct][CoC], the maintainer of this crate, the [Cortex-M team][team], promises
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to intervene to uphold that code of conduct.
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[CoC]: https://www.rust-lang.org/policies/code-of-conduct
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[team]: https://github.com/rust-embedded/wg#the-cortex-m-team
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@@ -1,56 +0,0 @@
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//! How to use the heap and a dynamic memory allocator
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//!
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//! This example depends on the alloc-cortex-m crate so you'll have to add it to your Cargo.toml:
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//!
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//! ``` text
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//! # or edit the Cargo.toml file manually
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//! $ cargo add alloc-cortex-m
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//! ```
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//!
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//! ---
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#![feature(alloc_error_handler)]
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#![no_main]
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#![no_std]
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extern crate alloc;
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use panic_halt as _;
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use self::alloc::vec;
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use core::alloc::Layout;
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use alloc_cortex_m::CortexMHeap;
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use cortex_m::asm;
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use cortex_m_rt::entry;
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use cortex_m_semihosting::{debug, hprintln};
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// this is the allocator the application will use
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#[global_allocator]
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static ALLOCATOR: CortexMHeap = CortexMHeap::empty();
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const HEAP_SIZE: usize = 1024; // in bytes
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#[entry]
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fn main() -> ! {
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// Initialize the allocator BEFORE you use it
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unsafe { ALLOCATOR.init(cortex_m_rt::heap_start() as usize, HEAP_SIZE) }
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// Growable array allocated on the heap
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let xs = vec![0, 1, 2];
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hprintln!("{:?}", xs).unwrap();
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// exit QEMU
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// NOTE do not run this on hardware; it can corrupt OpenOCD state
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debug::exit(debug::EXIT_SUCCESS);
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loop {}
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}
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// define what happens in an Out Of Memory (OOM) condition
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#[alloc_error_handler]
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fn alloc_error(_layout: Layout) -> ! {
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asm::bkpt();
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loop {}
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}
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@@ -1,107 +0,0 @@
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//! Debugging a crash (exception)
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//!
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//! Most crash conditions trigger a hard fault exception, whose handler is defined via
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//! `exception!(HardFault, ..)`. The `HardFault` handler has access to the exception frame, a
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//! snapshot of the CPU registers at the moment of the exception.
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//!
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//! This program crashes and the `HardFault` handler prints to the console the contents of the
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//! `ExceptionFrame` and then triggers a breakpoint. From that breakpoint one can see the backtrace
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//! that led to the exception.
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//!
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//! ``` text
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//! (gdb) continue
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//! Program received signal SIGTRAP, Trace/breakpoint trap.
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//! __bkpt () at asm/bkpt.s:3
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//! 3 bkpt
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//!
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//! (gdb) backtrace
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//! #0 __bkpt () at asm/bkpt.s:3
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//! #1 0x080030b4 in cortex_m::asm::bkpt () at $$/cortex-m-0.5.0/src/asm.rs:19
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//! #2 rust_begin_unwind (args=..., file=..., line=99, col=5) at $$/panic-semihosting-0.2.0/src/lib.rs:87
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//! #3 0x08001d06 in core::panicking::panic_fmt () at libcore/panicking.rs:71
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//! #4 0x080004a6 in crash::hard_fault (ef=0x20004fa0) at examples/crash.rs:99
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//! #5 0x08000548 in UserHardFault (ef=0x20004fa0) at <exception macros>:10
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//! #6 0x0800093a in HardFault () at asm.s:5
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//! Backtrace stopped: previous frame identical to this frame (corrupt stack?)
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//! ```
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//!
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//! In the console output one will find the state of the Program Counter (PC) register at the time
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//! of the exception.
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//!
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//! ``` text
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//! panicked at 'HardFault at ExceptionFrame {
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//! r0: 0x2fffffff,
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//! r1: 0x2fffffff,
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//! r2: 0x080051d4,
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//! r3: 0x080051d4,
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//! r12: 0x20000000,
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//! lr: 0x08000435,
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//! pc: 0x08000ab6,
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//! xpsr: 0x61000000
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//! }', examples/crash.rs:106:5
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//! ```
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//!
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//! This register contains the address of the instruction that caused the exception. In GDB one can
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//! disassemble the program around this address to observe the instruction that caused the
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//! exception.
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//!
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//! ``` text
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//! (gdb) disassemble/m 0x08000ab6
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//! Dump of assembler code for function core::ptr::read_volatile:
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//! 451 pub unsafe fn read_volatile<T>(src: *const T) -> T {
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//! 0x08000aae <+0>: sub sp, #16
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//! 0x08000ab0 <+2>: mov r1, r0
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//! 0x08000ab2 <+4>: str r0, [sp, #8]
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//!
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//! 452 intrinsics::volatile_load(src)
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//! 0x08000ab4 <+6>: ldr r0, [sp, #8]
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//! -> 0x08000ab6 <+8>: ldr r0, [r0, #0]
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//! 0x08000ab8 <+10>: str r0, [sp, #12]
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//! 0x08000aba <+12>: ldr r0, [sp, #12]
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//! 0x08000abc <+14>: str r1, [sp, #4]
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//! 0x08000abe <+16>: str r0, [sp, #0]
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//! 0x08000ac0 <+18>: b.n 0x8000ac2 <core::ptr::read_volatile+20>
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//!
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//! 453 }
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//! 0x08000ac2 <+20>: ldr r0, [sp, #0]
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//! 0x08000ac4 <+22>: add sp, #16
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//! 0x08000ac6 <+24>: bx lr
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//!
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//! End of assembler dump.
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//! ```
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//!
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//! `ldr r0, [r0, #0]` caused the exception. This instruction tried to load (read) a 32-bit word
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//! from the address stored in the register `r0`. Looking again at the contents of `ExceptionFrame`
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//! we see that the `r0` contained the address `0x2FFF_FFFF` when this instruction was executed.
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//!
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//! ---
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#![no_main]
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#![no_std]
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use panic_halt as _;
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use core::fmt::Write;
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use core::ptr;
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use cortex_m_rt::{entry, exception, ExceptionFrame};
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use cortex_m_semihosting::hio;
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#[entry]
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fn main() -> ! {
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unsafe {
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// read an address outside of the RAM region; this causes a HardFault exception
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ptr::read_volatile(0x2FFF_FFFF as *const u32);
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}
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loop {}
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}
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#[exception]
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fn HardFault(ef: &ExceptionFrame) -> ! {
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if let Ok(mut hstdout) = hio::hstdout() {
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writeln!(hstdout, "{:#?}", ef).ok();
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}
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loop {}
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}
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@@ -1,62 +0,0 @@
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//! Using a device crate
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//!
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//! Crates generated using [`svd2rust`] are referred to as device crates. These crates provide an
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//! API to access the peripherals of a device.
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//!
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//! [`svd2rust`]: https://crates.io/crates/svd2rust
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//!
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//! This example depends on the [`stm32f3`] crate so you'll have to
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//! uncomment it in your Cargo.toml.
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//!
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//! [`stm32f3`]: https://crates.io/crates/stm32f3
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//!
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//! ```
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//! $ edit Cargo.toml && tail $_
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//! [dependencies.stm32f3]
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//! features = ["stm32f303", "rt"]
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//! version = "0.7.1"
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//! ```
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//!
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//! You also need to set the build target to thumbv7em-none-eabihf,
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//! typically by editing `.cargo/config` and uncommenting the relevant target line.
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//!
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//! ---
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#![no_main]
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#![no_std]
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#[allow(unused_extern_crates)]
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use panic_halt as _;
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use cortex_m::peripheral::syst::SystClkSource;
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use cortex_m_rt::entry;
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use cortex_m_semihosting::hprint;
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use stm32f3::stm32f303::{interrupt, Interrupt, NVIC};
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#[entry]
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fn main() -> ! {
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let p = cortex_m::Peripherals::take().unwrap();
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let mut syst = p.SYST;
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let mut nvic = p.NVIC;
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nvic.enable(Interrupt::EXTI0);
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|
||||||
// configure the system timer to wrap around every second
|
|
||||||
syst.set_clock_source(SystClkSource::Core);
|
|
||||||
syst.set_reload(8_000_000); // 1s
|
|
||||||
syst.enable_counter();
|
|
||||||
|
|
||||||
loop {
|
|
||||||
// busy wait until the timer wraps around
|
|
||||||
while !syst.has_wrapped() {}
|
|
||||||
|
|
||||||
// trigger the `EXTI0` interrupt
|
|
||||||
NVIC::pend(Interrupt::EXTI0);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
#[interrupt]
|
|
||||||
fn EXTI0() {
|
|
||||||
hprint!(".").unwrap();
|
|
||||||
}
|
|
||||||
@@ -1,37 +0,0 @@
|
|||||||
//! Overriding an exception handler
|
|
||||||
//!
|
|
||||||
//! You can override an exception handler using the [`#[exception]`][1] attribute.
|
|
||||||
//!
|
|
||||||
//! [1]: https://rust-embedded.github.io/cortex-m-rt/0.6.1/cortex_m_rt_macros/fn.exception.html
|
|
||||||
//!
|
|
||||||
//! ---
|
|
||||||
|
|
||||||
#![deny(unsafe_code)]
|
|
||||||
#![no_main]
|
|
||||||
#![no_std]
|
|
||||||
|
|
||||||
use panic_halt as _;
|
|
||||||
|
|
||||||
use cortex_m::peripheral::syst::SystClkSource;
|
|
||||||
use cortex_m::Peripherals;
|
|
||||||
use cortex_m_rt::{entry, exception};
|
|
||||||
use cortex_m_semihosting::hprint;
|
|
||||||
|
|
||||||
#[entry]
|
|
||||||
fn main() -> ! {
|
|
||||||
let p = Peripherals::take().unwrap();
|
|
||||||
let mut syst = p.SYST;
|
|
||||||
|
|
||||||
// configures the system timer to trigger a SysTick exception every second
|
|
||||||
syst.set_clock_source(SystClkSource::Core);
|
|
||||||
syst.set_reload(8_000_000); // period = 1s
|
|
||||||
syst.enable_counter();
|
|
||||||
syst.enable_interrupt();
|
|
||||||
|
|
||||||
loop {}
|
|
||||||
}
|
|
||||||
|
|
||||||
#[exception]
|
|
||||||
fn SysTick() {
|
|
||||||
hprint!(".").unwrap();
|
|
||||||
}
|
|
||||||
@@ -1,20 +0,0 @@
|
|||||||
//! Prints "Hello, world!" on the host console using semihosting
|
|
||||||
|
|
||||||
#![no_main]
|
|
||||||
#![no_std]
|
|
||||||
|
|
||||||
use panic_halt as _;
|
|
||||||
|
|
||||||
use cortex_m_rt::entry;
|
|
||||||
use cortex_m_semihosting::{debug, hprintln};
|
|
||||||
|
|
||||||
#[entry]
|
|
||||||
fn main() -> ! {
|
|
||||||
hprintln!("Hello, world!").unwrap();
|
|
||||||
|
|
||||||
// exit QEMU
|
|
||||||
// NOTE do not run this on hardware; it can corrupt OpenOCD state
|
|
||||||
debug::exit(debug::EXIT_SUCCESS);
|
|
||||||
|
|
||||||
loop {}
|
|
||||||
}
|
|
||||||
@@ -1,33 +0,0 @@
|
|||||||
//! Sends "Hello, world!" through the ITM port 0
|
|
||||||
//!
|
|
||||||
//! ITM is much faster than semihosting. Like 4 orders of magnitude or so.
|
|
||||||
//!
|
|
||||||
//! **NOTE** Cortex-M0 chips don't support ITM.
|
|
||||||
//!
|
|
||||||
//! You'll have to connect the microcontroller's SWO pin to the SWD interface. Note that some
|
|
||||||
//! development boards don't provide this option.
|
|
||||||
//!
|
|
||||||
//! You'll need [`itmdump`] to receive the message on the host plus you'll need to uncomment two
|
|
||||||
//! `monitor` commands in the `.gdbinit` file.
|
|
||||||
//!
|
|
||||||
//! [`itmdump`]: https://docs.rs/itm/0.2.1/itm/
|
|
||||||
//!
|
|
||||||
//! ---
|
|
||||||
|
|
||||||
#![no_main]
|
|
||||||
#![no_std]
|
|
||||||
|
|
||||||
use panic_halt as _;
|
|
||||||
|
|
||||||
use cortex_m::{iprintln, Peripherals};
|
|
||||||
use cortex_m_rt::entry;
|
|
||||||
|
|
||||||
#[entry]
|
|
||||||
fn main() -> ! {
|
|
||||||
let mut p = Peripherals::take().unwrap();
|
|
||||||
let stim = &mut p.ITM.stim[0];
|
|
||||||
|
|
||||||
iprintln!(stim, "Hello, world!");
|
|
||||||
|
|
||||||
loop {}
|
|
||||||
}
|
|
||||||
@@ -1,28 +0,0 @@
|
|||||||
//! Changing the panicking behavior
|
|
||||||
//!
|
|
||||||
//! The easiest way to change the panicking behavior is to use a different [panic handler crate][0].
|
|
||||||
//!
|
|
||||||
//! [0]: https://crates.io/keywords/panic-impl
|
|
||||||
|
|
||||||
#![no_main]
|
|
||||||
#![no_std]
|
|
||||||
|
|
||||||
// Pick one of these panic handlers:
|
|
||||||
|
|
||||||
// `panic!` halts execution; the panic message is ignored
|
|
||||||
use panic_halt as _;
|
|
||||||
|
|
||||||
// Reports panic messages to the host stderr using semihosting
|
|
||||||
// NOTE to use this you need to uncomment the `panic-semihosting` dependency in Cargo.toml
|
|
||||||
// use panic_semihosting as _;
|
|
||||||
|
|
||||||
// Logs panic messages using the ITM (Instrumentation Trace Macrocell)
|
|
||||||
// NOTE to use this you need to uncomment the `panic-itm` dependency in Cargo.toml
|
|
||||||
// use panic_itm as _;
|
|
||||||
|
|
||||||
use cortex_m_rt::entry;
|
|
||||||
|
|
||||||
#[entry]
|
|
||||||
fn main() -> ! {
|
|
||||||
panic!("Oops")
|
|
||||||
}
|
|
||||||
@@ -1,56 +0,0 @@
|
|||||||
//! Conditionally compiling tests with std and our executable with no_std.
|
|
||||||
//!
|
|
||||||
//! Rust's built in unit testing framework requires the standard library,
|
|
||||||
//! but we need to build our final executable with no_std.
|
|
||||||
//! The testing framework also generates a `main` method, so we need to only use the `#[entry]`
|
|
||||||
//! annotation when building our final image.
|
|
||||||
//! For more information on why this example works, see this excellent blog post.
|
|
||||||
//! https://os.phil-opp.com/unit-testing/
|
|
||||||
//!
|
|
||||||
//! Running this example:
|
|
||||||
//!
|
|
||||||
//! Ensure there are no targets specified under `[build]` in `.cargo/config`
|
|
||||||
//! In order to make this work, we lose the convenience of having a default target that isn't the
|
|
||||||
//! host.
|
|
||||||
//!
|
|
||||||
//! cargo build --example test_on_host --target thumbv7m-none-eabi
|
|
||||||
//! cargo test --example test_on_host
|
|
||||||
|
|
||||||
#![cfg_attr(test, allow(unused_imports))]
|
|
||||||
#![cfg_attr(not(test), no_std)]
|
|
||||||
#![cfg_attr(not(test), no_main)]
|
|
||||||
|
|
||||||
// pick a panicking behavior
|
|
||||||
#[cfg(not(test))]
|
|
||||||
use panic_halt as _; // you can put a breakpoint on `rust_begin_unwind` to catch panics
|
|
||||||
// use panic_abort as _; // requires nightly
|
|
||||||
// use panic_itm as _; // logs messages over ITM; requires ITM support
|
|
||||||
// use panic_semihosting as _; // logs messages to the host stderr; requires a debugger
|
|
||||||
|
|
||||||
use cortex_m::asm;
|
|
||||||
use cortex_m_rt::entry;
|
|
||||||
|
|
||||||
#[cfg(not(test))]
|
|
||||||
#[entry]
|
|
||||||
fn main() -> ! {
|
|
||||||
asm::nop(); // To not have main optimize to abort in release mode, remove when you add code
|
|
||||||
|
|
||||||
loop {
|
|
||||||
// your code goes here
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
fn add(a: i32, b: i32) -> i32 {
|
|
||||||
a + b
|
|
||||||
}
|
|
||||||
|
|
||||||
#[cfg(test)]
|
|
||||||
mod test {
|
|
||||||
use super::*;
|
|
||||||
|
|
||||||
#[test]
|
|
||||||
fn foo() {
|
|
||||||
println!("tests work!");
|
|
||||||
assert!(2 == add(1, 1));
|
|
||||||
}
|
|
||||||
}
|
|
||||||
Reference in new issue
Block a user