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"time-driver-tim2", "stm32l476rg", "nightly"] } +embassy-time = { version = "0.1.3", features = ["defmt", "nightly"] } +panic-probe = { version = "0.3", features = ["print-defmt"] } diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..6226e9f --- /dev/null +++ b/LICENSE @@ -0,0 +1,14 @@ +BSD Zero Clause License + +Copyright (c) 2022 Dominic Meiser + +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH +REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY +AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, +INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM +LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR +OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR +PERFORMANCE OF THIS SOFTWARE. diff --git a/build.rs b/build.rs new file mode 100644 index 0000000..035ede0 --- /dev/null +++ b/build.rs @@ -0,0 +1,32 @@ +//! 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, fs::File, io::Write, 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"); + + println!("cargo:rustc-link-arg-bins=--nmagic"); + println!("cargo:rustc-link-arg-bins=-Tlink.x"); + println!("cargo:rustc-link-arg-bins=-Tdefmt.x"); +} diff --git a/memory.x b/memory.x new file mode 100644 index 0000000..2b982db --- /dev/null +++ b/memory.x @@ -0,0 +1,7 @@ +/* STM32L476RG */ +MEMORY +{ + FLASH : ORIGIN = 0x08000000, LENGTH = 1024K + RAM : ORIGIN = 0x20000000, LENGTH = 96K + /* RAM2 : ORIGIN = 0x10000000, LENGTH = 32K */ +} diff --git a/rust-toolchain b/rust-toolchain new file mode 100644 index 0000000..bf867e0 --- /dev/null +++ b/rust-toolchain @@ -0,0 +1 @@ +nightly diff --git a/rustfmt.toml b/rustfmt.toml new file mode 100644 index 0000000..62f400e --- /dev/null +++ b/rustfmt.toml @@ -0,0 +1,38 @@ +edition = "2021" +max_width = 90 +newline_style = "Unix" +unstable_features = true + +# skip generated files +format_generated_files = false + +# always use tabs. +hard_tabs = true +tab_spaces = 4 + +# commas inbetween but not after +match_block_trailing_comma = true +trailing_comma = "Never" + +# fix my imports for me +imports_granularity = "Crate" +#group_imports = "One" + +# format everything +format_code_in_doc_comments = true +format_macro_matchers = true + +# don't keep outdated syntax +use_field_init_shorthand = true +use_try_shorthand = true + +# condense Struct { _, _ } to Struct { .. } +condense_wildcard_suffixes = true + +# prefer foo(Bar { \n }) over foo(\nBar { \n }\n) +overflow_delimited_expr = true + +# I wish there was a way to allow 0..n but not a + 1..b + 2 +# However, the later looks so terible that I use spaces everywhere +# https://github.com/rust-lang/rustfmt/issues/3367 +spaces_around_ranges = true diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..783a23d --- /dev/null +++ b/src/main.rs @@ -0,0 +1,31 @@ +#![no_std] +#![no_main] +#![feature(type_alias_impl_trait)] + +use defmt::*; +use defmt_rtt as _; +use embassy_executor::Spawner; +use embassy_stm32::{ + gpio::{Level, Output, Speed}, + peripherals::PA5 +}; +use embassy_time::{Duration, Timer}; +use panic_probe as _; // global logger + +#[embassy_executor::task] +async fn blinker(mut led: Output<'static, PA5>, interval: Duration) { + loop { + led.set_high(); + Timer::after(interval).await; + led.set_low(); + Timer::after(interval).await; + } +} + +#[embassy_executor::main] +async fn main(spawner: Spawner) { + let p = embassy_stm32::init(Default::default()); + + let led = Output::new(p.PA5, Level::Low, Speed::Low); + unwrap!(spawner.spawn(blinker(led, Duration::from_millis(500)))); +}