Move rtos-trace example to a separate project to simplify Cargo.toml

examples/nrf-rtos-trace/.cargo/config.toml

@@ -0,0 +1,9 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# replace nRF82840_xxAA with your chip as listed in `probe-run --list-chips`
+runner = "probe-run --chip nRF52840_xxAA"
+
+[build]
+target = "thumbv7em-none-eabi"
+
+[env]
+DEFMT_LOG = "trace"

examples/nrf-rtos-trace/Cargo.toml

@@ -0,0 +1,51 @@
+[package]
+edition = "2021"
+name = "embassy-nrf-examples"
+version = "0.1.0"
+
+[features]
+default = ["log", "nightly"]
+nightly = ["embassy-executor/nightly", "embassy-nrf/nightly", "embassy-nrf/unstable-traits", "embassy-usb", "embassy-usb-serial", "embassy-usb-hid", "embassy-usb-ncm", "embedded-io/async", "embassy-net"]
+log = [
+    "dep:log",
+    "embassy-util/log",
+    "embassy-executor/log",
+    "embassy-nrf/log",
+    "embassy-net/log",
+    "embassy-usb-ncm/log",
+    # Currently broken:
+    # "embassy-usb/log",
+    # "embassy-usb-serial/log",
+    # "embassy-usb-hid/log",
+]
+
+[dependencies]
+embassy-util = { version = "0.1.0", path = "../../embassy-util" }
+embassy-executor = { version = "0.1.0", path = "../../embassy-executor", features=["rtos-trace", "rtos-trace-interrupt"] }
+embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac"] }
+embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["tcp", "dhcpv4", "medium-ethernet", "pool-16"], optional = true }
+embassy-usb = { version = "0.1.0", path = "../../embassy-usb", optional = true }
+embassy-usb-serial = { version = "0.1.0", path = "../../embassy-usb-serial", optional = true }
+embassy-usb-hid = { version = "0.1.0", path = "../../embassy-usb-hid", optional = true }
+embassy-usb-ncm = { version = "0.1.0", path = "../../embassy-usb-ncm", optional = true }
+embedded-io = "0.3.0"
+
+cortex-m = "0.7.3"
+cortex-m-rt = "0.7.0"
+panic-probe = { version = "0.3" }
+futures = { version = "0.3.17", default-features = false, features = ["async-await"] }
+rand = { version = "0.8.4", default-features = false }
+embedded-storage = "0.3.0"
+usbd-hid = "0.5.2"
+serde = { version = "1.0.136", default-features = false }
+rtos-trace = "0.1.3"
+systemview-target = { version = "0.1.1", features = ["callbacks-app", "callbacks-os", "log", "cortex-m"] }
+log = { version = "0.4.17", optional = true }
+
+[[bin]]
+name = "rtos_trace"
+required-features = ["nightly"]
+
+[patch.crates-io]
+rtos-trace = { git = "https://gitlab.com/quentinmit/rtos-trace.git", branch = "build-fix" }
+systemview-target = { git = "https://gitlab.com/quentinmit/rtos-trace.git", branch = "build-fix" }

examples/nrf-rtos-trace/build.rs

@@ -0,0 +1,36 @@
+//! 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");
+
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    #[cfg(feature = "defmt")]
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+}

examples/nrf-rtos-trace/memory.x

@@ -0,0 +1,7 @@
+MEMORY
+{
+  /* NOTE 1 K = 1 KiBi = 1024 bytes */
+  /* These values correspond to the NRF52840 with Softdevices S140 7.0.1 */
+  FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
+  RAM : ORIGIN = 0x20000000, LENGTH = 256K
+}

examples/nrf-rtos-trace/src/bin/rtos_trace.rs

@@ -0,0 +1,69 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use core::task::Poll;
+
+use embassy_executor::executor::Spawner;
+use embassy_executor::time::{Duration, Instant, Timer};
+use embassy_nrf::Peripherals;
+#[cfg(feature = "log")]
+use log::*;
+use panic_probe as _;
+// N.B. systemview_target cannot be used at the same time as defmt_rtt.
+use rtos_trace;
+use systemview_target::SystemView;
+
+static LOGGER: systemview_target::SystemView = systemview_target::SystemView::new();
+rtos_trace::global_trace! {SystemView}
+
+struct TraceInfo();
+
+impl rtos_trace::RtosTraceApplicationCallbacks for TraceInfo {
+    fn system_description() {}
+    fn sysclock() -> u32 {
+        64000000
+    }
+}
+rtos_trace::global_application_callbacks! {TraceInfo}
+
+#[embassy_executor::task]
+async fn run1() {
+    loop {
+        #[cfg(feature = "log")]
+        info!("DING DONG");
+        #[cfg(not(feature = "log"))]
+        rtos_trace::trace::marker(13);
+        Timer::after(Duration::from_ticks(16000)).await;
+    }
+}
+
+#[embassy_executor::task]
+async fn run2() {
+    loop {
+        Timer::at(Instant::from_ticks(0)).await;
+    }
+}
+
+#[embassy_executor::task]
+async fn run3() {
+    futures::future::poll_fn(|cx| {
+        cx.waker().wake_by_ref();
+        Poll::<()>::Pending
+    })
+    .await;
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner, _p: Peripherals) {
+    LOGGER.init();
+    #[cfg(feature = "log")]
+    {
+        ::log::set_logger(&LOGGER).ok();
+        ::log::set_max_level(::log::LevelFilter::Trace);
+    }
+
+    spawner.spawn(run1()).unwrap();
+    spawner.spawn(run2()).unwrap();
+    spawner.spawn(run3()).unwrap();
+}