A => .cargo-ok +0 -0
A => .cargo/config +40 -0
@@ 1,40 @@
+[target.thumbv7m-none-eabi]
+# uncomment this to make `cargo run` execute programs on QEMU
+# runner = "qemu-system-arm -cpu cortex-m3 -machine lm3s6965evb -nographic -semihosting-config enable=on,target=native -kernel"
+
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# uncomment ONE of these three option to make `cargo run` start a GDB session
+# which option to pick depends on your system
+# runner = "arm-none-eabi-gdb -q -x openocd.gdb"
+# runner = "gdb-multiarch -q -x openocd.gdb"
+# runner = "gdb -q -x openocd.gdb"
+
+rustflags = [
+ # This is needed if your flash or ram addresses are not aligned to 0x10000 in memory.x
+ # See https://github.com/rust-embedded/cortex-m-quickstart/pull/95
+ "-C", "link-arg=--nmagic",
+
+ # LLD (shipped with the Rust toolchain) is used as the default linker
+ "-C", "link-arg=-Tlink.x",
+
+ # if you run into problems with LLD switch to the GNU linker by commenting out
+ # this line
+ # "-C", "linker=arm-none-eabi-ld",
+
+ # if you need to link to pre-compiled C libraries provided by a C toolchain
+ # use GCC as the linker by commenting out both lines above and then
+ # uncommenting the three lines below
+ # "-C", "linker=arm-none-eabi-gcc",
+ # "-C", "link-arg=-Wl,-Tlink.x",
+ # "-C", "link-arg=-nostartfiles",
+]
+
+[build]
+# Pick ONE of these compilation targets
+# target = "thumbv6m-none-eabi" # Cortex-M0 and Cortex-M0+
+target = "thumbv7m-none-eabi" # Cortex-M3
+# target = "thumbv7em-none-eabi" # Cortex-M4 and Cortex-M7 (no FPU)
+# target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
+# target = "thumbv8m.base-none-eabi" # Cortex-M23
+# target = "thumbv8m.main-none-eabi" # Cortex-M33 (no FPU)
+# target = "thumbv8m.main-none-eabihf" # Cortex-M33 (with FPU)
A => .gitignore +13 -0
@@ 1,13 @@
+**/*.rs.bk
+.#*
+.gdb_history
+Cargo.lock
+target/
+
+# editor files
+.vscode/*
+!.vscode/*.md
+!.vscode/*.svd
+!.vscode/launch.json
+!.vscode/tasks.json
+!.vscode/extensions.json
A => Cargo.toml +36 -0
@@ 1,36 @@
+[package]
+authors = ["Andrew Thorp <andrew.thorp.dev@gmail.com>"]
+edition = "2018"
+readme = "README.md"
+name = "app"
+version = "0.1.0"
+
+[dependencies]
+cortex-m = "0.6.0"
+cortex-m-rt = "0.6.10"
+cortex-m-semihosting = "0.3.3"
+panic-halt = "0.2.0"
+
+# Uncomment for the panic example.
+# panic-itm = "0.4.1"
+
+# Uncomment for the allocator example.
+# alloc-cortex-m = "0.4.0"
+
+# Uncomment for the device example.
+# Update `memory.x`, set target to `thumbv7em-none-eabihf` in `.cargo/config`,
+# and then use `cargo build --examples device` to build it.
+# [dependencies.stm32f3]
+# features = ["stm32f303", "rt"]
+# version = "0.7.1"
+
+# this lets you use `cargo fix`!
+[[bin]]
+name = "app"
+test = false
+bench = false
+
+[profile.release]
+codegen-units = 1 # better optimizations
+debug = true # symbols are nice and they don't increase the size on Flash
+lto = true # better optimizations
A => README.md +135 -0
@@ 1,135 @@
+# `cortex-m-quickstart`
+
+> A template for building applications for ARM Cortex-M microcontrollers
+
+This project is developed and maintained by the [Cortex-M team][team].
+
+## Dependencies
+
+To build embedded programs using this template you'll need:
+
+- Rust 1.31, 1.30-beta, nightly-2018-09-13 or a newer toolchain. e.g. `rustup
+ default beta`
+
+- The `cargo generate` subcommand. [Installation
+ instructions](https://github.com/ashleygwilliams/cargo-generate#installation).
+
+- `rust-std` components (pre-compiled `core` crate) for the ARM Cortex-M
+ targets. Run:
+
+``` console
+$ rustup target add thumbv6m-none-eabi thumbv7m-none-eabi thumbv7em-none-eabi thumbv7em-none-eabihf
+```
+
+## Using this template
+
+**NOTE**: This is the very short version that only covers building programs. For
+the long version, which additionally covers flashing, running and debugging
+programs, check [the embedded Rust book][book].
+
+[book]: https://rust-embedded.github.io/book
+
+0. Before we begin you need to identify some characteristics of the target
+ device as these will be used to configure the project:
+
+- The ARM core. e.g. Cortex-M3.
+
+- Does the ARM core include an FPU? Cortex-M4**F** and Cortex-M7**F** cores do.
+
+- How much Flash memory and RAM does the target device has? e.g. 256 KiB of
+ Flash and 32 KiB of RAM.
+
+- Where are Flash memory and RAM mapped in the address space? e.g. RAM is
+ commonly located at address `0x2000_0000`.
+
+You can find this information in the data sheet or the reference manual of your
+device.
+
+In this example we'll be using the STM32F3DISCOVERY. This board contains an
+STM32F303VCT6 microcontroller. This microcontroller has:
+
+- A Cortex-M4F core that includes a single precision FPU
+
+- 256 KiB of Flash located at address 0x0800_0000.
+
+- 40 KiB of RAM located at address 0x2000_0000. (There's another RAM region but
+ for simplicity we'll ignore it).
+
+1. Instantiate the template.
+
+``` console
+$ cargo generate --git https://github.com/rust-embedded/cortex-m-quickstart
+ Project Name: app
+ Creating project called `app`...
+ Done! New project created /tmp/app
+
+$ cd app
+```
+
+2. Set a default compilation target. There are four options as mentioned at the
+ bottom of `.cargo/config`. For the STM32F303VCT6, which has a Cortex-M4F
+ core, we'll pick the `thumbv7em-none-eabihf` target.
+
+``` console
+$ tail -n6 .cargo/config
+```
+
+``` toml
+[build]
+# Pick ONE of these compilation targets
+# target = "thumbv6m-none-eabi" # Cortex-M0 and Cortex-M0+
+# target = "thumbv7m-none-eabi" # Cortex-M3
+# target = "thumbv7em-none-eabi" # Cortex-M4 and Cortex-M7 (no FPU)
+target = "thumbv7em-none-eabihf" # Cortex-M4F and Cortex-M7F (with FPU)
+```
+
+3. Enter the memory region information into the `memory.x` file.
+
+``` console
+$ cat memory.x
+/* Linker script for the STM32F303VCT6 */
+MEMORY
+{
+ /* NOTE 1 K = 1 KiBi = 1024 bytes */
+ FLASH : ORIGIN = 0x08000000, LENGTH = 256K
+ RAM : ORIGIN = 0x20000000, LENGTH = 40K
+}
+```
+
+4. Build the template application or one of the examples.
+
+``` console
+$ cargo build
+```
+
+## VS Code
+
+This template includes launch configurations for debugging CortexM programs with Visual Studio Code located in the `.vscode/` directory.
+See [.vscode/README.md](./.vscode/README.md) for more information.
+If you're not using VS Code, you can safely delete the directory from the generated project.
+
+# License
+
+This template is licensed under either of
+
+- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+ http://www.apache.org/licenses/LICENSE-2.0)
+
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+
+at your option.
+
+## Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
+
+## Code of Conduct
+
+Contribution to this crate is organized under the terms of the [Rust Code of
+Conduct][CoC], the maintainer of this crate, the [Cortex-M team][team], promises
+to intervene to uphold that code of conduct.
+
+[CoC]: https://www.rust-lang.org/policies/code-of-conduct
+[team]: https://github.com/rust-embedded/wg#the-cortex-m-team
A => build.rs +31 -0
@@ 1,31 @@
+//! This build script copies the `memory.x` file from the crate root into
+//! a directory where the linker can always find it at build time.
+//! For many projects this is optional, as the linker always searches the
+//! project root directory -- wherever `Cargo.toml` is. However, if you
+//! are using a workspace or have a more complicated build setup, this
+//! build script becomes required. Additionally, by requesting that
+//! Cargo re-run the build script whenever `memory.x` is changed,
+//! updating `memory.x` ensures a rebuild of the application with the
+//! new memory settings.
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+ // Put `memory.x` in our output directory and ensure it's
+ // on the linker search path.
+ let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+ File::create(out.join("memory.x"))
+ .unwrap()
+ .write_all(include_bytes!("memory.x"))
+ .unwrap();
+ println!("cargo:rustc-link-search={}", out.display());
+
+ // By default, Cargo will re-run a build script whenever
+ // any file in the project changes. By specifying `memory.x`
+ // here, we ensure the build script is only re-run when
+ // `memory.x` is changed.
+ println!("cargo:rerun-if-changed=memory.x");
+}
A => examples/allocator.rs +56 -0
@@ 1,56 @@
+//! How to use the heap and a dynamic memory allocator
+//!
+//! This example depends on the alloc-cortex-m crate so you'll have to add it to your Cargo.toml:
+//!
+//! ``` text
+//! # or edit the Cargo.toml file manually
+//! $ cargo add alloc-cortex-m
+//! ```
+//!
+//! ---
+
+#![feature(alloc_error_handler)]
+#![no_main]
+#![no_std]
+
+extern crate alloc;
+use panic_halt as _;
+
+use self::alloc::vec;
+use core::alloc::Layout;
+
+use alloc_cortex_m::CortexMHeap;
+use cortex_m::asm;
+use cortex_m_rt::entry;
+use cortex_m_semihosting::{hprintln, debug};
+
+// this is the allocator the application will use
+#[global_allocator]
+static ALLOCATOR: CortexMHeap = CortexMHeap::empty();
+
+const HEAP_SIZE: usize = 1024; // in bytes
+
+#[entry]
+fn main() -> ! {
+ // Initialize the allocator BEFORE you use it
+ unsafe { ALLOCATOR.init(cortex_m_rt::heap_start() as usize, HEAP_SIZE) }
+
+ // Growable array allocated on the heap
+ let xs = vec![0, 1, 2];
+
+ hprintln!("{:?}", xs).unwrap();
+
+ // exit QEMU
+ // NOTE do not run this on hardware; it can corrupt OpenOCD state
+ debug::exit(debug::EXIT_SUCCESS);
+
+ loop {}
+}
+
+// define what happens in an Out Of Memory (OOM) condition
+#[alloc_error_handler]
+fn alloc_error(_layout: Layout) -> ! {
+ asm::bkpt();
+
+ loop {}
+}
A => examples/crash.rs +96 -0
@@ 1,96 @@
+//! Debugging a crash (exception)
+//!
+//! Most crash conditions trigger a hard fault exception, whose handler is defined via
+//! `exception!(HardFault, ..)`. The `HardFault` handler has access to the exception frame, a
+//! snapshot of the CPU registers at the moment of the exception.
+//!
+//! This program crashes and the `HardFault` handler prints to the console the contents of the
+//! `ExceptionFrame` and then triggers a breakpoint. From that breakpoint one can see the backtrace
+//! that led to the exception.
+//!
+//! ``` text
+//! (gdb) continue
+//! Program received signal SIGTRAP, Trace/breakpoint trap.
+//! __bkpt () at asm/bkpt.s:3
+//! 3 bkpt
+//!
+//! (gdb) backtrace
+//! #0 __bkpt () at asm/bkpt.s:3
+//! #1 0x080030b4 in cortex_m::asm::bkpt () at $$/cortex-m-0.5.0/src/asm.rs:19
+//! #2 rust_begin_unwind (args=..., file=..., line=99, col=5) at $$/panic-semihosting-0.2.0/src/lib.rs:87
+//! #3 0x08001d06 in core::panicking::panic_fmt () at libcore/panicking.rs:71
+//! #4 0x080004a6 in crash::hard_fault (ef=0x20004fa0) at examples/crash.rs:99
+//! #5 0x08000548 in UserHardFault (ef=0x20004fa0) at <exception macros>:10
+//! #6 0x0800093a in HardFault () at asm.s:5
+//! Backtrace stopped: previous frame identical to this frame (corrupt stack?)
+//! ```
+//!
+//! In the console output one will find the state of the Program Counter (PC) register at the time
+//! of the exception.
+//!
+//! ``` text
+//! panicked at 'HardFault at ExceptionFrame {
+//! r0: 0x2fffffff,
+//! r1: 0x2fffffff,
+//! r2: 0x080051d4,
+//! r3: 0x080051d4,
+//! r12: 0x20000000,
+//! lr: 0x08000435,
+//! pc: 0x08000ab6,
+//! xpsr: 0x61000000
+//! }', examples/crash.rs:106:5
+//! ```
+//!
+//! This register contains the address of the instruction that caused the exception. In GDB one can
+//! disassemble the program around this address to observe the instruction that caused the
+//! exception.
+//!
+//! ``` text
+//! (gdb) disassemble/m 0x08000ab6
+//! Dump of assembler code for function core::ptr::read_volatile:
+//! 451 pub unsafe fn read_volatile<T>(src: *const T) -> T {
+//! 0x08000aae <+0>: sub sp, #16
+//! 0x08000ab0 <+2>: mov r1, r0
+//! 0x08000ab2 <+4>: str r0, [sp, #8]
+//!
+//! 452 intrinsics::volatile_load(src)
+//! 0x08000ab4 <+6>: ldr r0, [sp, #8]
+//! -> 0x08000ab6 <+8>: ldr r0, [r0, #0]
+//! 0x08000ab8 <+10>: str r0, [sp, #12]
+//! 0x08000aba <+12>: ldr r0, [sp, #12]
+//! 0x08000abc <+14>: str r1, [sp, #4]
+//! 0x08000abe <+16>: str r0, [sp, #0]
+//! 0x08000ac0 <+18>: b.n 0x8000ac2 <core::ptr::read_volatile+20>
+//!
+//! 453 }
+//! 0x08000ac2 <+20>: ldr r0, [sp, #0]
+//! 0x08000ac4 <+22>: add sp, #16
+//! 0x08000ac6 <+24>: bx lr
+//!
+//! End of assembler dump.
+//! ```
+//!
+//! `ldr r0, [r0, #0]` caused the exception. This instruction tried to load (read) a 32-bit word
+//! from the address stored in the register `r0`. Looking again at the contents of `ExceptionFrame`
+//! we see that the `r0` contained the address `0x2FFF_FFFF` when this instruction was executed.
+//!
+//! ---
+
+#![no_main]
+#![no_std]
+
+use panic_halt as _;
+
+use core::ptr;
+
+use cortex_m_rt::entry;
+
+#[entry]
+fn main() -> ! {
+ unsafe {
+ // read an address outside of the RAM region; this causes a HardFault exception
+ ptr::read_volatile(0x2FFF_FFFF as *const u32);
+ }
+
+ loop {}
+}
A => examples/device.rs +62 -0
@@ 1,62 @@
+//! Using a device crate
+//!
+//! Crates generated using [`svd2rust`] are referred to as device crates. These crates provide an
+//! API to access the peripherals of a device.
+//!
+//! [`svd2rust`]: https://crates.io/crates/svd2rust
+//!
+//! This example depends on the [`stm32f3`] crate so you'll have to
+//! uncomment it in your Cargo.toml.
+//!
+//! [`stm32f3`]: https://crates.io/crates/stm32f3
+//!
+//! ```
+//! $ edit Cargo.toml && tail $_
+//! [dependencies.stm32f3]
+//! features = ["stm32f303", "rt"]
+//! version = "0.7.1"
+//! ```
+//!
+//! You also need to set the build target to thumbv7em-none-eabihf,
+//! typically by editing `.cargo/config` and uncommenting the relevant target line.
+//!
+//! ---
+
+#![no_main]
+#![no_std]
+
+#[allow(unused_extern_crates)]
+use panic_halt as _;
+
+use cortex_m::peripheral::syst::SystClkSource;
+use cortex_m_rt::entry;
+use cortex_m_semihosting::hprint;
+use stm32f3::stm32f303::{interrupt, Interrupt, NVIC};
+
+#[entry]
+fn main() -> ! {
+ let p = cortex_m::Peripherals::take().unwrap();
+
+ let mut syst = p.SYST;
+ let mut nvic = p.NVIC;
+
+ nvic.enable(Interrupt::EXTI0);
+
+ // 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();
+}
A => examples/exception.rs +37 -0
@@ 1,37 @@
+//! 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();
+}
A => examples/hello.rs +20 -0
@@ 1,20 @@
+//! 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 {}
+}
A => examples/itm.rs +33 -0
@@ 1,33 @@
+//! 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 {}
+}
A => examples/panic.rs +28 -0
@@ 1,28 @@
+//! 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")
+}
A => examples/test_on_host.rs +57 -0
@@ 1,57 @@
+//! 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));
+ }
+}
A => memory.x +34 -0
@@ 1,34 @@
+MEMORY
+{
+ /* NOTE 1 K = 1 KiBi = 1024 bytes */
+ /* TODO Adjust these memory regions to match your device memory layout */
+ /* These values correspond to the LM3S6965, one of the few devices QEMU can emulate */
+ FLASH : ORIGIN = 0x00000000, LENGTH = 256K
+ RAM : ORIGIN = 0x20000000, LENGTH = 64K
+}
+
+/* This is where the call stack will be allocated. */
+/* The stack is of the full descending type. */
+/* You may want to use this variable to locate the call stack and static
+ variables in different memory regions. Below is shown the default value */
+/* _stack_start = ORIGIN(RAM) + LENGTH(RAM); */
+
+/* You can use this symbol to customize the location of the .text section */
+/* If omitted the .text section will be placed right after the .vector_table
+ section */
+/* This is required only on microcontrollers that store some configuration right
+ after the vector table */
+/* _stext = ORIGIN(FLASH) + 0x400; */
+
+/* Example of putting non-initialized variables into custom RAM locations. */
+/* This assumes you have defined a region RAM2 above, and in the Rust
+ sources added the attribute `#[link_section = ".ram2bss"]` to the data
+ you want to place there. */
+/* Note that the section will not be zero-initialized by the runtime! */
+/* SECTIONS {
+ .ram2bss (NOLOAD) : ALIGN(4) {
+ *(.ram2bss);
+ . = ALIGN(4);
+ } > RAM2
+ } INSERT AFTER .bss;
+*/
A => openocd.cfg +12 -0
@@ 1,12 @@
+# Sample OpenOCD configuration for the STM32F3DISCOVERY development board
+
+# Depending on the hardware revision you got you'll have to pick ONE of these
+# interfaces. At any time only one interface should be commented out.
+
+# Revision C (newer revision)
+source [find interface/stlink-v2-1.cfg]
+
+# Revision A and B (older revisions)
+# source [find interface/stlink-v2.cfg]
+
+source [find target/stm32f3x.cfg]
A => openocd.gdb +40 -0
@@ 1,40 @@
+target extended-remote :3333
+
+# print demangled symbols
+set print asm-demangle on
+
+# set backtrace limit to not have infinite backtrace loops
+set backtrace limit 32
+
+# detect unhandled exceptions, hard faults and panics
+break DefaultHandler
+break HardFault
+break rust_begin_unwind
+# # run the next few lines so the panic message is printed immediately
+# # the number needs to be adjusted for your panic handler
+# commands $bpnum
+# next 4
+# end
+
+# *try* to stop at the user entry point (it might be gone due to inlining)
+break main
+
+monitor arm semihosting enable
+
+# # send captured ITM to the file itm.fifo
+# # (the microcontroller SWO pin must be connected to the programmer SWO pin)
+# # 8000000 must match the core clock frequency
+# monitor tpiu config internal itm.txt uart off 8000000
+
+# # OR: make the microcontroller SWO pin output compatible with UART (8N1)
+# # 8000000 must match the core clock frequency
+# # 2000000 is the frequency of the SWO pin
+# monitor tpiu config external uart off 8000000 2000000
+
+# # enable ITM port 0
+# monitor itm port 0 on
+
+load
+
+# start the process but immediately halt the processor
+stepi
A => src/main.rs +20 -0
@@ 1,20 @@
+#![no_std]
+#![no_main]
+
+// pick a panicking behavior
+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;
+
+#[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
+ }
+}