From 8cf8b2406d4be014d466a9318303a65c5c7ff076 Mon Sep 17 00:00:00 2001
From: Haobo Gu <haobogu@outlook.com>
Date: Mon, 8 Dec 2025 17:21:27 +0800
Subject: feat: add nRF54LM20A support

Signed-off-by: Haobo Gu <haobogu@outlook.com>
---
 examples/nrf54lm20/.cargo/config.toml        | 10 ++++++
 examples/nrf54lm20/Cargo.toml                | 37 +++++++++++++++++++++
 examples/nrf54lm20/build.rs                  | 35 ++++++++++++++++++++
 examples/nrf54lm20/memory.x                  |  5 +++
 examples/nrf54lm20/run.sh                    | 15 +++++++++
 examples/nrf54lm20/src/bin/blinky.rs         | 23 +++++++++++++
 examples/nrf54lm20/src/bin/gpio.rs           | 23 +++++++++++++
 examples/nrf54lm20/src/bin/gpiote_channel.rs | 49 ++++++++++++++++++++++++++++
 examples/nrf54lm20/src/bin/gpiote_port.rs    | 33 +++++++++++++++++++
 examples/nrf54lm20/src/bin/timer.rs          | 30 +++++++++++++++++
 10 files changed, 260 insertions(+)
 create mode 100644 examples/nrf54lm20/.cargo/config.toml
 create mode 100644 examples/nrf54lm20/Cargo.toml
 create mode 100644 examples/nrf54lm20/build.rs
 create mode 100644 examples/nrf54lm20/memory.x
 create mode 100755 examples/nrf54lm20/run.sh
 create mode 100644 examples/nrf54lm20/src/bin/blinky.rs
 create mode 100644 examples/nrf54lm20/src/bin/gpio.rs
 create mode 100644 examples/nrf54lm20/src/bin/gpiote_channel.rs
 create mode 100644 examples/nrf54lm20/src/bin/gpiote_port.rs
 create mode 100644 examples/nrf54lm20/src/bin/timer.rs

(limited to 'examples')

diff --git a/examples/nrf54lm20/.cargo/config.toml b/examples/nrf54lm20/.cargo/config.toml
new file mode 100644
index 000000000..e26853bef
--- /dev/null
+++ b/examples/nrf54lm20/.cargo/config.toml
@@ -0,0 +1,10 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# runner = "probe-rs run --chip nrf54lm20"
+# probe-rs doesn't support nRF54LM20A right now, so jlink is needed
+runner = "./run.sh"
+
+[build]
+target = "thumbv8m.main-none-eabihf"
+
+[env]
+DEFMT_LOG = "trace"
diff --git a/examples/nrf54lm20/Cargo.toml b/examples/nrf54lm20/Cargo.toml
new file mode 100644
index 000000000..5482fc77a
--- /dev/null
+++ b/examples/nrf54lm20/Cargo.toml
@@ -0,0 +1,37 @@
+[package]
+edition = "2024"
+name = "embassy-nrf54lm20-examples"
+version = "0.1.0"
+license = "MIT OR Apache-2.0"
+publish = false
+
+[dependencies]
+embassy-futures = { version = "0.1.2", path = "../../embassy-futures" }
+embassy-executor = { version = "0.9.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "executor-interrupt", "defmt"] }
+embassy-time = { version = "0.5.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime"] }
+embassy-sync = { version = "0.7.2", path = "../../embassy-sync", features = ["defmt"] }
+embassy-nrf = { version = "0.8.0", path = "../../embassy-nrf", features = ["defmt", "nrf54lm20-app-s", "time-driver-grtc", "gpiote", "unstable-pac", "time"] }
+embedded-io = { version = "0.6.0", features = ["defmt-03"]  }
+embedded-io-async = { version = "0.6.1", features = ["defmt-03"] }
+
+rand = { version = "0.9.0", default-features = false }
+
+defmt = "1.0.1"
+defmt-rtt = "1.0.0"
+panic-probe = { version = "1.0.0", features = ["print-defmt"] }
+
+cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.0"
+
+embedded-storage = "0.3.1"
+portable-atomic = "1"
+
+static_cell = "2"
+
+[profile.release]
+debug = 2
+
+[package.metadata.embassy]
+build = [
+  { target = "thumbv8m.main-none-eabihf", artifact-dir = "out/examples/nrf54lm20" }
+]
diff --git a/examples/nrf54lm20/build.rs b/examples/nrf54lm20/build.rs
new file mode 100644
index 000000000..30691aa97
--- /dev/null
+++ b/examples/nrf54lm20/build.rs
@@ -0,0 +1,35 @@
+//! 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");
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+}
diff --git a/examples/nrf54lm20/memory.x b/examples/nrf54lm20/memory.x
new file mode 100644
index 000000000..564f488ac
--- /dev/null
+++ b/examples/nrf54lm20/memory.x
@@ -0,0 +1,5 @@
+MEMORY
+{
+  FLASH : ORIGIN = 0x00000000, LENGTH = 2036K
+  RAM : ORIGIN = 0x20000000, LENGTH = 512K
+}
diff --git a/examples/nrf54lm20/run.sh b/examples/nrf54lm20/run.sh
new file mode 100755
index 000000000..2386163a7
--- /dev/null
+++ b/examples/nrf54lm20/run.sh
@@ -0,0 +1,15 @@
+cp $1 $1.elf
+
+ELF_FILE="$1.elf"
+
+JLinkExe <<EOF
+Device nrf54lm20a_m33
+SelectInterface SWD
+Speed 4000
+LoadFile ${ELF_FILE}
+r
+g
+q
+EOF
+
+defmt-print -e $1 tcp
\ No newline at end of file
diff --git a/examples/nrf54lm20/src/bin/blinky.rs b/examples/nrf54lm20/src/bin/blinky.rs
new file mode 100644
index 000000000..962e9f5a6
--- /dev/null
+++ b/examples/nrf54lm20/src/bin/blinky.rs
@@ -0,0 +1,23 @@
+#![no_std]
+#![no_main]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_nrf::gpio::{Level, Output, OutputDrive};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    let mut led = Output::new(p.P1_22, Level::Low, OutputDrive::HighDrive);
+
+    loop {
+        info!("high!");
+        led.set_high();
+        Timer::after_millis(300).await;
+        info!("low!");
+        led.set_low();
+        Timer::after_millis(300).await;
+    }
+}
diff --git a/examples/nrf54lm20/src/bin/gpio.rs b/examples/nrf54lm20/src/bin/gpio.rs
new file mode 100644
index 000000000..4b6b4630d
--- /dev/null
+++ b/examples/nrf54lm20/src/bin/gpio.rs
@@ -0,0 +1,23 @@
+#![no_std]
+#![no_main]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_nrf::gpio::{Input, Pull};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    let btn = Input::new(p.P1_26, Pull::Up);
+
+    loop {
+        if btn.is_high() {
+            info!("high");
+        } else {
+            info!("low");
+        }
+        Timer::after_millis(100).await;
+    }
+}
diff --git a/examples/nrf54lm20/src/bin/gpiote_channel.rs b/examples/nrf54lm20/src/bin/gpiote_channel.rs
new file mode 100644
index 000000000..0f30f06c7
--- /dev/null
+++ b/examples/nrf54lm20/src/bin/gpiote_channel.rs
@@ -0,0 +1,49 @@
+#![no_std]
+#![no_main]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_nrf::gpio::Pull;
+use embassy_nrf::gpiote::{InputChannel, InputChannelPolarity};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    info!("Starting!");
+
+    let mut ch1 = InputChannel::new(p.GPIOTE20_CH0, p.P1_26, Pull::Up, InputChannelPolarity::HiToLo);
+    let mut ch2 = InputChannel::new(p.GPIOTE20_CH1, p.P1_09, Pull::Up, InputChannelPolarity::LoToHi);
+    let mut ch3 = InputChannel::new(p.GPIOTE20_CH2, p.P1_08, Pull::Up, InputChannelPolarity::Toggle);
+    let mut ch4 = InputChannel::new(p.GPIOTE30_CH0, p.P0_05, Pull::Up, InputChannelPolarity::Toggle);
+
+    let button1 = async {
+        loop {
+            ch1.wait().await;
+            info!("Button 1 pressed")
+        }
+    };
+
+    let button2 = async {
+        loop {
+            ch2.wait().await;
+            info!("Button 2 released")
+        }
+    };
+
+    let button3 = async {
+        loop {
+            ch3.wait().await;
+            info!("Button 3 toggled")
+        }
+    };
+
+    let button4 = async {
+        loop {
+            ch4.wait().await;
+            info!("Button 4 toggled")
+        }
+    };
+
+    embassy_futures::join::join4(button1, button2, button3, button4).await;
+}
diff --git a/examples/nrf54lm20/src/bin/gpiote_port.rs b/examples/nrf54lm20/src/bin/gpiote_port.rs
new file mode 100644
index 000000000..6dbd63d92
--- /dev/null
+++ b/examples/nrf54lm20/src/bin/gpiote_port.rs
@@ -0,0 +1,33 @@
+#![no_std]
+#![no_main]
+
+use defmt::{info, unwrap};
+use embassy_executor::Spawner;
+use embassy_nrf::gpio::{Input, Pull};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::task(pool_size = 4)]
+async fn button_task(n: usize, mut pin: Input<'static>) {
+    loop {
+        pin.wait_for_low().await;
+        info!("Button {:?} pressed!", n);
+        pin.wait_for_high().await;
+        info!("Button {:?} released!", n);
+    }
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    info!("Starting!");
+
+    let btn1 = Input::new(p.P1_26, Pull::Up);
+    let btn2 = Input::new(p.P1_09, Pull::Up);
+    let btn3 = Input::new(p.P1_08, Pull::Up);
+    let btn4 = Input::new(p.P0_05, Pull::Up);
+
+    spawner.spawn(unwrap!(button_task(1, btn1)));
+    spawner.spawn(unwrap!(button_task(2, btn2)));
+    spawner.spawn(unwrap!(button_task(3, btn3)));
+    spawner.spawn(unwrap!(button_task(4, btn4)));
+}
diff --git a/examples/nrf54lm20/src/bin/timer.rs b/examples/nrf54lm20/src/bin/timer.rs
new file mode 100644
index 000000000..68acc91c1
--- /dev/null
+++ b/examples/nrf54lm20/src/bin/timer.rs
@@ -0,0 +1,30 @@
+#![no_std]
+#![no_main]
+
+use defmt::{info, unwrap};
+use embassy_executor::Spawner;
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::task]
+async fn run1() {
+    loop {
+        info!("BIG INFREQUENT TICK");
+        Timer::after_secs(10).await;
+    }
+}
+
+#[embassy_executor::task]
+async fn run2() {
+    loop {
+        info!("tick");
+        Timer::after_secs(1).await;
+    }
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let _p = embassy_nrf::init(Default::default());
+    spawner.spawn(unwrap!(run1()));
+    spawner.spawn(unwrap!(run2()));
+}
-- 
cgit