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Merge #651
651: Use `critical_section` for `Peripherals::take`. r=therealprof a=reitermarkus - `cortex_m` rust-embedded/cortex-m#447 - `msp430` rust-embedded/msp430#13 - `riscv` rust-embedded/riscv#110 - `xtensa_lx` esp-rs/xtensa-lx#20, esp-rs/esp-hal#151 - `mips_mcu` kiffie/pic32-rs#5 Co-authored-by: Markus Reiter <me@reitermark.us>
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‎CHANGELOG.md‎

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@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
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## [Unreleased]
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- Use `critical_section::with` instead of `interrupt::free` for `Peripherals::take`.
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## [v0.25.1] - 2022-08-22
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- Fixed parentheses in RegisterBlock field accessors

‎ci/svd2rust-regress/src/svd_test.rs‎

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@@ -5,11 +5,11 @@ use std::io::prelude::*;
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use std::path::PathBuf;
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use std::process::{Command, Output};
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const CRATES_ALL: &[&str] = &["bare-metal = \"0.2.0\"", "vcell = \"0.1.2\""];
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const CRATES_ALL: &[&str] = &["critical-section = \"1.0\"", "vcell = \"0.1.2\""];
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const CRATES_MSP430: &[&str] = &["msp430 = \"0.2.2\"", "msp430-rt = \"0.2.0\""];
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const CRATES_MSP430_NIGHTLY: &[&str] = &["msp430-atomic = \"0.1.2\""];
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const CRATES_CORTEX_M: &[&str] = &["cortex-m = \"0.7.0\"", "cortex-m-rt = \"0.6.13\""];
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const CRATES_RISCV: &[&str] = &["riscv = \"0.5.0\"", "riscv-rt = \"0.6.0\""];
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const CRATES_CORTEX_M: &[&str] = &["cortex-m = \"0.7.6\"", "cortex-m-rt = \"0.6.13\""];
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const CRATES_RISCV: &[&str] = &["riscv = \"0.9.0\"", "riscv-rt = \"0.9.0\""];
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const CRATES_XTENSALX: &[&str] = &["xtensa-lx-rt = \"0.9.0\"", "xtensa-lx = \"0.6.0\""];
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const CRATES_MIPS: &[&str] = &["mips-mcu = \"0.1.0\""];
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const PROFILE_ALL: &[&str] = &["[profile.dev]", "incremental = false"];

‎src/generate/device.rs‎

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@@ -300,48 +300,42 @@ pub fn render(d: &Device, config: &Config, device_x: &mut String) -> Result<Toke
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}
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}
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let span = Span::call_site();
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let take = match config.target {
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Target::CortexM => Some(Ident::new("cortex_m", span)),
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Target::Msp430 => Some(Ident::new("msp430", span)),
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Target::RISCV => Some(Ident::new("riscv", span)),
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Target::XtensaLX => Some(Ident::new("xtensa_lx", span)),
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Target::Mips => Some(Ident::new("mips_mcu", span)),
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Target::None => None,
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}
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.map(|krate| {
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quote! {
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///Returns all the peripherals *once*
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#[inline]
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pub fn take() -> Option<Self> {
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#krate::interrupt::free(|_| {
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if unsafe { DEVICE_PERIPHERALS } {
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None
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} else {
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Some(unsafe { Peripherals::steal() })
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}
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})
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}
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}
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});
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out.extend(quote! {
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// NOTE `no_mangle` is used here to prevent linking different minor versions of the device
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// crate as that would let you `take` the device peripherals more than once (one per minor
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// version)
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#[no_mangle]
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static mut DEVICE_PERIPHERALS: bool = false;
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///All the peripherals
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/// All the peripherals.
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#[allow(non_snake_case)]
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pub struct Peripherals {
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#fields
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}
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impl Peripherals {
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#take
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/// Returns all the peripherals *once*.
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#[cfg(feature = "critical-section")]
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#[inline]
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pub fn take() -> Option<Self> {
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critical_section::with(|_| {
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// SAFETY: We are in a critical section, so we have exclusive access
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// to `DEVICE_PERIPHERALS`.
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if unsafe { DEVICE_PERIPHERALS } {
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return None
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}
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// SAFETY: `DEVICE_PERIPHERALS` is set to `true` by `Peripherals::steal`,
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// ensuring the peripherals can only be returned once.
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Some(unsafe { Peripherals::steal() })
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})
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}
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///Unchecked version of `Peripherals::take`
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/// Unchecked version of `Peripherals::take`.
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///
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/// # Safety
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///
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/// Each of the returned peripherals must be used at most once.
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#[inline]
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pub unsafe fn steal() -> Self {
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DEVICE_PERIPHERALS = true;

‎src/lib.rs‎

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//!
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//! [CMSIS-SVD]: http://www.keil.com/pack/doc/CMSIS/SVD/html/index.html
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//!
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//! A SVD file is an XML file that describes the hardware features of a
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//! An SVD file is an XML file that describes the hardware features of a
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//! microcontroller. In particular, it lists all the peripherals available to the
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//! device, where the registers associated to each device are located in memory,
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//! and what's the function of each register.
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//! $ cargo fmt
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//! ```
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//!
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//! The resulting crate must provide an opt-in "rt" feature and depend on these crates:
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//! `cortex-m` v0.7, `cortex-m-rt` >=v0.6.13 and `vcell` >=v0.1.2. Furthermore
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//! the "device" feature of `cortex-m-rt` must be enabled when the "rt" feature is enabled. The
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//! `Cargo.toml` of the device crate will look like this:
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//! The resulting crate must provide an opt-in `rt` feature and depend on these crates:
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//!
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//! - [`critical-section`](https://crates.io/crates/critical-section) v1.x
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//! - [`cortex-m`](https://crates.io/crates/cortex-m) >=v0.7.6
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//! - [`cortex-m-rt`](https://crates.io/crates/cortex-m-rt) >=v0.6.13
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//! - [`vcell`](https://crates.io/crates/vcell) >=v0.1.2
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//!
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//! Furthermore, the "device" feature of `cortex-m-rt` must be enabled when the `rt` feature
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//! is enabled. The `Cargo.toml` of the device crate will look like this:
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//!
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//! ``` toml
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//! [dependencies]
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//! cortex-m = "0.7"
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//! critical-section = { version = "1.0", optional = true }
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//! cortex-m = "0.7.6"
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//! cortex-m-rt = { version = "0.6.13", optional = true }
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//! vcell = "0.1.2"
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//!
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//! [dependencies.cortex-m-rt]
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//! optional = true
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//! version = "0.6.13"
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//!
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//! [features]
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//! rt = ["cortex-m-rt/device"]
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//! ```
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//! $ cargo fmt
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//! ```
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//!
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//! The resulting crate must provide opt-in "rt" feature and depend on these crates: `msp430`
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//! v0.3.x, `msp430-rt` v0.3.x, and `vcell` v0.1.x. If the `--nightly` flag is provided to
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//! `svd2rust`, then `msp430-atomic` v0.1.4 is also needed. Furthermore the "device" feature of
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//! `msp430-rt` must be enabled when the "rt" feature is enabled. The `Cargo.toml` of the device
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//! crate will look like this:
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//! The resulting crate must provide opt-in `rt` feature and depend on these crates:
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//!
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//! - [`critical-section`](https://crates.io/crates/critical-section) v1.x
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//! - [`msp430`](https://crates.io/crates/msp430) v0.3.x
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//! - [`msp430-rt`](https://crates.io/crates/msp430-rt) v0.3.x
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//! - [`vcell`](https://crates.io/crates/vcell) v0.1.x
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//!
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//! If the `--nightly` flag is provided to `svd2rust`, then `msp430-atomic` v0.1.4 is also needed.
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//! Furthermore the "device" feature of `msp430-rt` must be enabled when the `rt` feature is
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//! enabled. The `Cargo.toml` of the device crate will look like this:
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//!
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//! ``` toml
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//! [dependencies]
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//! critical-section = { version = "1.0", optional = true }
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//! msp430 = "0.3.0"
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//! vcell = "0.1.0"
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//! msp430-atomic = "0.1.4" # Only when using the --nightly flag
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//!
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//! [dependencies.msp430-rt]
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//! optional = true
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//! version = "0.3.0"
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//! msp430-rt = { version = "0.3.0", optional = true }
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//! vcell = "0.1.0"
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//!
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//! [features]
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//! rt = ["msp430-rt/device"]
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//! ## Other targets
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//!
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//! When the target is riscv or none `svd2rust` will emit only the `lib.rs` file. Like in
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//! the cortex-m case we recommend you use `form` and `rustfmt` on the output.
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//! the `cortex-m` case, we recommend you use `form` and `rustfmt` on the output.
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//!
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//! The resulting crate must provide an opt-in "rt" feature and depend on these crates:
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//! The resulting crate must provide an opt-in `rt` feature and depend on these crates:
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//!
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//! - [`bare-metal`](https://crates.io/crates/bare-metal) v0.2.x
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//! - [`critical-section`](https://crates.io/crates/critical-section) v1.x
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//! - [`riscv`](https://crates.io/crates/riscv) v0.9.x (if target is RISC-V)
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//! - [`riscv-rt`](https://crates.io/crates/riscv-rt) v0.9.x (if target is RISC-V)
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//! - [`vcell`](https://crates.io/crates/vcell) v0.1.x
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//! - [`riscv`](https://crates.io/crates/riscv) v0.4.x if target = riscv.
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//! - [`riscv-rt`](https://crates.io/crates/riscv-rt) v0.4.x if target = riscv.
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//!
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//! The `*-rt` dependencies must be optional only enabled when the "rt" feature is enabled. The
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//! `Cargo.toml` of the device crate will look like this for a riscv target:
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//! The `*-rt` dependencies must be optional only enabled when the `rt` feature is enabled. The
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//! `Cargo.toml` of the device crate will look like this for a RISC-V target:
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//!
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//! ``` toml
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//! [dependencies]
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//! bare-metal = "0.2.0"
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//! riscv = "0.4.0"
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//! critical-section = { version = "1.0", optional = true }
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//! riscv = "0.9.0"
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//! riscv-rt = { version = "0.9.0", optional = true }
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//! vcell = "0.1.0"
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//!
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//! [dependencies.riscv-rt]
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//! optional = true
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//! version = "0.4.0"
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//!
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//! [features]
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//! rt = ["riscv-rt"]
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//! ```
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//! used with the `cortex-m` crate `NVIC` API.
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//!
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//! ```ignore
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//! use cortex_m::interrupt;
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//! use cortex_m::peripheral::Peripherals;
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//! use stm32f30x::Interrupt;
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//!
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//! nvic.enable(Interrupt::TIM3);
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//! ```
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//!
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//! ## the "rt" feature
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//! ## the `rt` feature
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//!
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//! If the "rt" Cargo feature of the svd2rust generated crate is enabled, the crate will populate the
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//! If the `rt` Cargo feature of the svd2rust generated crate is enabled, the crate will populate the
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//! part of the vector table that contains the interrupt vectors and provide an
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//! [`interrupt!`](macro.interrupt.html) macro (non Cortex-M/MSP430 targets) or [`interrupt`] attribute
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//! (Cortex-M or [MSP430](https://docs.rs/msp430-rt-macros/0.1/msp430_rt_macros/attr.interrupt.html))

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