feat: embassy-lpc55 hal with gpio and pint driver

ci.sh

@@ -171,6 +171,7 @@ cargo batch \
     --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32u031r8,defmt,exti,time-driver-any,time \
     --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32u073mb,defmt,exti,time-driver-any,time \
     --- build --release --manifest-path embassy-stm32/Cargo.toml --target thumbv6m-none-eabi --features stm32u083rc,defmt,exti,time-driver-any,time \
+    --- build --release --manifest-path embassy-nxp/Cargo.toml --target thumbv8m.main-none-eabihf \
     --- build --release --manifest-path cyw43/Cargo.toml --target thumbv6m-none-eabi --features ''\
     --- build --release --manifest-path cyw43/Cargo.toml --target thumbv6m-none-eabi --features 'log' \
     --- build --release --manifest-path cyw43/Cargo.toml --target thumbv6m-none-eabi --features 'defmt' \
@@ -227,6 +228,7 @@ cargo batch \
     --- build --release --manifest-path examples/stm32wb/Cargo.toml --target thumbv7em-none-eabi --out-dir out/examples/stm32wb \
     --- build --release --manifest-path examples/stm32wba/Cargo.toml --target thumbv8m.main-none-eabihf --out-dir out/examples/stm32wba \
     --- build --release --manifest-path examples/stm32wl/Cargo.toml --target thumbv7em-none-eabi --out-dir out/examples/stm32wl \
+    --- build --release --manifest-path examples/lpc55s69/Cargo.toml --target thumbv8m.main-none-eabihf --out-dir out/examples/lpc55s69 \
     --- build --release --manifest-path examples/boot/application/nrf/Cargo.toml --target thumbv7em-none-eabi --features embassy-nrf/nrf52840,skip-include --out-dir out/examples/boot/nrf52840 \
     --- build --release --manifest-path examples/boot/application/nrf/Cargo.toml --target thumbv8m.main-none-eabihf --features embassy-nrf/nrf9160-ns,skip-include --out-dir out/examples/boot/nrf9160 \
     --- build --release --manifest-path examples/boot/application/nrf/Cargo.toml --target thumbv8m.main-none-eabihf --features embassy-nrf/nrf9120-ns,skip-include --out-dir out/examples/boot/nrf9120 \

embassy-nxp/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "embassy-nxp"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+cortex-m = "0.7.7"
+cortex-m-rt = "0.7.0"
+critical-section = "1.1.2"
+embassy-hal-internal = {version = "0.2.0", path = "../embassy-hal-internal", features = ["cortex-m", "prio-bits-2"] }
+embassy-sync = { version = "0.6.0", path = "../embassy-sync" }
+lpc55-pac = "0.5.0"
+defmt = "0.3.8"
+
+[features]
+default = ["rt"]
+rt = ["lpc55-pac/rt"]

embassy-nxp/src/gpio.rs

@@ -0,0 +1,361 @@
+use embassy_hal_internal::impl_peripheral;
+
+use crate::pac_utils::*;
+use crate::{peripherals, Peripheral, PeripheralRef};
+
+pub(crate) fn init() {
+    // Enable clocks for GPIO, PINT, and IOCON
+    syscon_reg()
+        .ahbclkctrl0
+        .modify(|_, w| w.gpio0().enable().gpio1().enable().mux().enable().iocon().enable());
+}
+
+/// The GPIO pin level for pins set on "Digital" mode.
+#[derive(Debug, Eq, PartialEq, Clone, Copy)]
+pub enum Level {
+    /// Logical low. Corresponds to 0V.
+    Low,
+    /// Logical high. Corresponds to VDD.
+    High,
+}
+
+/// Pull setting for a GPIO input set on "Digital" mode.
+#[derive(Debug, Clone, Copy, Eq, PartialEq)]
+pub enum Pull {
+    /// No pull.
+    None,
+    /// Internal pull-up resistor.
+    Up,
+    /// Internal pull-down resistor.
+    Down,
+}
+
+/// The LPC55 boards have two GPIO banks, each with 32 pins. This enum represents the two banks.
+#[derive(Debug, Eq, PartialEq, Clone, Copy)]
+pub enum Bank {
+    Bank0 = 0,
+    Bank1 = 1,
+}
+
+/// GPIO output driver. Internally, this is a specialized [Flex] pin.
+pub struct Output<'d> {
+    pub(crate) pin: Flex<'d>,
+}
+
+impl<'d> Output<'d> {
+    /// Create GPIO output driver for a [Pin] with the provided [initial output](Level).
+    #[inline]
+    pub fn new(pin: impl Peripheral<P = impl Pin> + 'd, initial_output: Level) -> Self {
+        let mut pin = Flex::new(pin);
+        pin.set_as_output();
+        let mut result = Self { pin };
+
+        match initial_output {
+            Level::High => result.set_high(),
+            Level::Low => result.set_low(),
+        };
+
+        result
+    }
+
+    pub fn set_high(&mut self) {
+        gpio_reg().set[self.pin.pin_bank() as usize].write(|w| unsafe { w.bits(self.pin.bit()) })
+    }
+
+    pub fn set_low(&mut self) {
+        gpio_reg().clr[self.pin.pin_bank() as usize].write(|w| unsafe { w.bits(self.pin.bit()) })
+    }
+
+    pub fn toggle(&mut self) {
+        gpio_reg().not[self.pin.pin_bank() as usize].write(|w| unsafe { w.bits(self.pin.bit()) })
+    }
+
+    /// Get the current output level of the pin. Note that the value returned by this function is
+    /// the voltage level reported by the pin, not the value set by the output driver.
+    pub fn level(&self) -> Level {
+        let bits = gpio_reg().pin[self.pin.pin_bank() as usize].read().bits();
+        if bits & self.pin.bit() != 0 {
+            Level::High
+        } else {
+            Level::Low
+        }
+    }
+}
+
+/// GPIO input driver. Internally, this is a specialized [Flex] pin.
+pub struct Input<'d> {
+    pub(crate) pin: Flex<'d>,
+}
+
+impl<'d> Input<'d> {
+    /// Create GPIO output driver for a [Pin] with the provided [Pull].
+    #[inline]
+    pub fn new(pin: impl Peripheral<P = impl Pin> + 'd, pull: Pull) -> Self {
+        let mut pin = Flex::new(pin);
+        pin.set_as_input();
+        let mut result = Self { pin };
+        result.set_pull(pull);
+
+        result
+    }
+
+    /// Set the pull configuration for the pin. To disable the pull, use [Pull::None].
+    pub fn set_pull(&mut self, pull: Pull) {
+        match_iocon!(register, iocon_reg(), self.pin.pin_bank(), self.pin.pin_number(), {
+            register.modify(|_, w| match pull {
+                Pull::None => w.mode().inactive(),
+                Pull::Up => w.mode().pull_up(),
+                Pull::Down => w.mode().pull_down(),
+            });
+        });
+    }
+
+    /// Get the current input level of the pin.
+    pub fn read(&self) -> Level {
+        let bits = gpio_reg().pin[self.pin.pin_bank() as usize].read().bits();
+        if bits & self.pin.bit() != 0 {
+            Level::High
+        } else {
+            Level::Low
+        }
+    }
+}
+
+/// A flexible GPIO (digital mode) pin whose mode is not yet determined. Under the hood, this is a
+/// reference to a type-erased pin called ["AnyPin"](AnyPin).
+pub struct Flex<'d> {
+    pub(crate) pin: PeripheralRef<'d, AnyPin>,
+}
+
+impl<'d> Flex<'d> {
+    /// Wrap the pin in a `Flex`.
+    ///
+    /// Note: you cannot assume that the pin will be in Digital mode after this call.
+    #[inline]
+    pub fn new(pin: impl Peripheral<P = impl Pin> + 'd) -> Self {
+        Self {
+            pin: pin.into_ref().map_into(),
+        }
+    }
+
+    /// Get the bank of this pin. See also [Bank].
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use embassy_nxp::gpio::{Bank, Flex};
+    ///
+    /// let p = embassy_nxp::init(Default::default());
+    /// let pin = Flex::new(p.PIO1_15);
+    ///
+    /// assert_eq!(pin.pin_bank(), Bank::Bank1);
+    /// ```
+    pub fn pin_bank(&self) -> Bank {
+        self.pin.pin_bank()
+    }
+
+    /// Get the number of this pin within its bank. See also [Bank].
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use embassy_nxp::gpio::Flex;
+    ///
+    /// let p = embassy_nxp::init(Default::default());
+    /// let pin = Flex::new(p.PIO1_15);
+    ///
+    /// assert_eq!(pin.pin_number(), 15 as u8);
+    /// ```
+    pub fn pin_number(&self) -> u8 {
+        self.pin.pin_number()
+    }
+
+    /// Get the bit mask for this pin. Useful for setting or clearing bits in a register. Note:
+    /// PIOx_0 is bit 0, PIOx_1 is bit 1, etc.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use embassy_nxp::gpio::Flex;
+    ///
+    /// let p = embassy_nxp::init(Default::default());
+    /// let pin = Flex::new(p.PIO1_3);
+    ///
+    /// assert_eq!(pin.bit(), 0b0000_1000);
+    /// ```
+    pub fn bit(&self) -> u32 {
+        1 << self.pin.pin_number()
+    }
+
+    /// Set the pin to digital mode. This is required for using a pin as a GPIO pin. The default
+    /// setting for pins is (usually) non-digital.
+    fn set_as_digital(&mut self) {
+        match_iocon!(register, iocon_reg(), self.pin_bank(), self.pin_number(), {
+            register.modify(|_, w| w.digimode().digital());
+        });
+    }
+
+    /// Set the pin in output mode. This implies setting the pin to digital mode, which this
+    /// function handles itself.
+    pub fn set_as_output(&mut self) {
+        self.set_as_digital();
+        gpio_reg().dirset[self.pin.pin_bank() as usize].write(|w| unsafe { w.dirsetp().bits(self.bit()) })
+    }
+
+    pub fn set_as_input(&mut self) {
+        self.set_as_digital();
+        gpio_reg().dirclr[self.pin.pin_bank() as usize].write(|w| unsafe { w.dirclrp().bits(self.bit()) })
+    }
+}
+
+/// Sealed trait for pins. This trait is sealed and cannot be implemented outside of this crate.
+pub(crate) trait SealedPin: Sized {
+    fn pin_bank(&self) -> Bank;
+    fn pin_number(&self) -> u8;
+}
+
+/// Interface for a Pin that can be configured by an [Input] or [Output] driver, or converted to an
+/// [AnyPin]. By default, this trait is sealed and cannot be implemented outside of the
+/// `embassy-nxp` crate due to the [SealedPin] trait.
+#[allow(private_bounds)]
+pub trait Pin: Peripheral<P = Self> + Into<AnyPin> + SealedPin + Sized + 'static {
+    /// Degrade to a generic pin struct
+    fn degrade(self) -> AnyPin {
+        AnyPin {
+            pin_bank: self.pin_bank(),
+            pin_number: self.pin_number(),
+        }
+    }
+
+    /// Returns the pin number within a bank
+    #[inline]
+    fn pin(&self) -> u8 {
+        self.pin_number()
+    }
+
+    /// Returns the bank of this pin
+    #[inline]
+    fn bank(&self) -> Bank {
+        self.pin_bank()
+    }
+}
+
+/// Type-erased GPIO pin.
+pub struct AnyPin {
+    pin_bank: Bank,
+    pin_number: u8,
+}
+
+impl AnyPin {
+    /// Unsafely create a new type-erased pin.
+    ///
+    /// # Safety
+    ///
+    /// You must ensure that you’re only using one instance of this type at a time.
+    pub unsafe fn steal(pin_bank: Bank, pin_number: u8) -> Self {
+        Self { pin_bank, pin_number }
+    }
+}
+
+impl_peripheral!(AnyPin);
+
+impl Pin for AnyPin {}
+impl SealedPin for AnyPin {
+    #[inline]
+    fn pin_bank(&self) -> Bank {
+        self.pin_bank
+    }
+
+    #[inline]
+    fn pin_number(&self) -> u8 {
+        self.pin_number
+    }
+}
+
+macro_rules! impl_pin {
+    ($name:ident, $bank:expr, $pin_num:expr) => {
+        impl Pin for peripherals::$name {}
+        impl SealedPin for peripherals::$name {
+            #[inline]
+            fn pin_bank(&self) -> Bank {
+                $bank
+            }
+
+            #[inline]
+            fn pin_number(&self) -> u8 {
+                $pin_num
+            }
+        }
+
+        impl From<peripherals::$name> for crate::gpio::AnyPin {
+            fn from(val: peripherals::$name) -> Self {
+                crate::gpio::Pin::degrade(val)
+            }
+        }
+    };
+}
+
+impl_pin!(PIO0_0, Bank::Bank0, 0);
+impl_pin!(PIO0_1, Bank::Bank0, 1);
+impl_pin!(PIO0_2, Bank::Bank0, 2);
+impl_pin!(PIO0_3, Bank::Bank0, 3);
+impl_pin!(PIO0_4, Bank::Bank0, 4);
+impl_pin!(PIO0_5, Bank::Bank0, 5);
+impl_pin!(PIO0_6, Bank::Bank0, 6);
+impl_pin!(PIO0_7, Bank::Bank0, 7);
+impl_pin!(PIO0_8, Bank::Bank0, 8);
+impl_pin!(PIO0_9, Bank::Bank0, 9);
+impl_pin!(PIO0_10, Bank::Bank0, 10);
+impl_pin!(PIO0_11, Bank::Bank0, 11);
+impl_pin!(PIO0_12, Bank::Bank0, 12);
+impl_pin!(PIO0_13, Bank::Bank0, 13);
+impl_pin!(PIO0_14, Bank::Bank0, 14);
+impl_pin!(PIO0_15, Bank::Bank0, 15);
+impl_pin!(PIO0_16, Bank::Bank0, 16);
+impl_pin!(PIO0_17, Bank::Bank0, 17);
+impl_pin!(PIO0_18, Bank::Bank0, 18);
+impl_pin!(PIO0_19, Bank::Bank0, 19);
+impl_pin!(PIO0_20, Bank::Bank0, 20);
+impl_pin!(PIO0_21, Bank::Bank0, 21);
+impl_pin!(PIO0_22, Bank::Bank0, 22);
+impl_pin!(PIO0_23, Bank::Bank0, 23);
+impl_pin!(PIO0_24, Bank::Bank0, 24);
+impl_pin!(PIO0_25, Bank::Bank0, 25);
+impl_pin!(PIO0_26, Bank::Bank0, 26);
+impl_pin!(PIO0_27, Bank::Bank0, 27);
+impl_pin!(PIO0_28, Bank::Bank0, 28);
+impl_pin!(PIO0_29, Bank::Bank0, 29);
+impl_pin!(PIO0_30, Bank::Bank0, 30);
+impl_pin!(PIO0_31, Bank::Bank0, 31);
+impl_pin!(PIO1_0, Bank::Bank1, 0);
+impl_pin!(PIO1_1, Bank::Bank1, 1);
+impl_pin!(PIO1_2, Bank::Bank1, 2);
+impl_pin!(PIO1_3, Bank::Bank1, 3);
+impl_pin!(PIO1_4, Bank::Bank1, 4);
+impl_pin!(PIO1_5, Bank::Bank1, 5);
+impl_pin!(PIO1_6, Bank::Bank1, 6);
+impl_pin!(PIO1_7, Bank::Bank1, 7);
+impl_pin!(PIO1_8, Bank::Bank1, 8);
+impl_pin!(PIO1_9, Bank::Bank1, 9);
+impl_pin!(PIO1_10, Bank::Bank1, 10);
+impl_pin!(PIO1_11, Bank::Bank1, 11);
+impl_pin!(PIO1_12, Bank::Bank1, 12);
+impl_pin!(PIO1_13, Bank::Bank1, 13);
+impl_pin!(PIO1_14, Bank::Bank1, 14);
+impl_pin!(PIO1_15, Bank::Bank1, 15);
+impl_pin!(PIO1_16, Bank::Bank1, 16);
+impl_pin!(PIO1_17, Bank::Bank1, 17);
+impl_pin!(PIO1_18, Bank::Bank1, 18);
+impl_pin!(PIO1_19, Bank::Bank1, 19);
+impl_pin!(PIO1_20, Bank::Bank1, 20);
+impl_pin!(PIO1_21, Bank::Bank1, 21);
+impl_pin!(PIO1_22, Bank::Bank1, 22);
+impl_pin!(PIO1_23, Bank::Bank1, 23);
+impl_pin!(PIO1_24, Bank::Bank1, 24);
+impl_pin!(PIO1_25, Bank::Bank1, 25);
+impl_pin!(PIO1_26, Bank::Bank1, 26);
+impl_pin!(PIO1_27, Bank::Bank1, 27);
+impl_pin!(PIO1_28, Bank::Bank1, 28);
+impl_pin!(PIO1_29, Bank::Bank1, 29);
+impl_pin!(PIO1_30, Bank::Bank1, 30);
+impl_pin!(PIO1_31, Bank::Bank1, 31);

embassy-nxp/src/lib.rs

@@ -0,0 +1,95 @@
+#![no_std]
+
+pub mod gpio;
+mod pac_utils;
+pub mod pint;
+
+pub use embassy_hal_internal::{into_ref, Peripheral, PeripheralRef};
+pub use lpc55_pac as pac;
+
+/// Initialize the `embassy-nxp` HAL with the provided configuration.
+///
+/// This returns the peripheral singletons that can be used for creating drivers.
+///
+/// This should only be called once and at startup, otherwise it panics.
+pub fn init(_config: config::Config) -> Peripherals {
+    gpio::init();
+    pint::init();
+
+    crate::Peripherals::take()
+}
+
+embassy_hal_internal::peripherals! {
+    // External pins. These are not only GPIOs, they are multi-purpose pins and can be used by other
+    // peripheral types (e.g. I2C).
+    PIO0_0,
+    PIO0_1,
+    PIO0_2,
+    PIO0_3,
+    PIO0_4,
+    PIO0_5,
+    PIO0_6,
+    PIO0_7,
+    PIO0_8,
+    PIO0_9,
+    PIO0_10,
+    PIO0_11,
+    PIO0_12,
+    PIO0_13,
+    PIO0_14,
+    PIO0_15,
+    PIO0_16,
+    PIO0_17,
+    PIO0_18,
+    PIO0_19,
+    PIO0_20,
+    PIO0_21,
+    PIO0_22,
+    PIO0_23,
+    PIO0_24,
+    PIO0_25,
+    PIO0_26,
+    PIO0_27,
+    PIO0_28,
+    PIO0_29,
+    PIO0_30,
+    PIO0_31,
+    PIO1_0,
+    PIO1_1,
+    PIO1_2,
+    PIO1_3,
+    PIO1_4,
+    PIO1_5,
+    PIO1_6,
+    PIO1_7,
+    PIO1_8,
+    PIO1_9,
+    PIO1_10,
+    PIO1_11,
+    PIO1_12,
+    PIO1_13,
+    PIO1_14,
+    PIO1_15,
+    PIO1_16,
+    PIO1_17,
+    PIO1_18,
+    PIO1_19,
+    PIO1_20,
+    PIO1_21,
+    PIO1_22,
+    PIO1_23,
+    PIO1_24,
+    PIO1_25,
+    PIO1_26,
+    PIO1_27,
+    PIO1_28,
+    PIO1_29,
+    PIO1_30,
+    PIO1_31,
+}
+
+/// HAL configuration for the NXP board.
+pub mod config {
+    #[derive(Default)]
+    pub struct Config {}
+}

embassy-nxp/src/pac_utils.rs

@@ -0,0 +1,323 @@
+/// Get the GPIO register block. This is used to configure all GPIO pins.
+///
+/// # Safety
+/// Due to the type system of peripherals, access to the settings of a single pin is possible only
+/// by a single thread at a time. Read/Write operations on a single registers are NOT atomic. You
+/// must ensure that the GPIO registers are not accessed concurrently by multiple threads.
+pub(crate) fn gpio_reg() -> &'static lpc55_pac::gpio::RegisterBlock {
+    unsafe { &*lpc55_pac::GPIO::ptr() }
+}
+
+/// Get the IOCON register block.
+///
+/// # Safety
+/// Read/Write operations on a single registers are NOT atomic. You must ensure that the GPIO
+/// registers are not accessed concurrently by multiple threads.
+pub(crate) fn iocon_reg() -> &'static lpc55_pac::iocon::RegisterBlock {
+    unsafe { &*lpc55_pac::IOCON::ptr() }
+}
+
+/// Get the INPUTMUX register block.
+///
+/// # Safety
+/// Read/Write operations on a single registers are NOT atomic. You must ensure that the GPIO
+/// registers are not accessed concurrently by multiple threads.
+pub(crate) fn inputmux_reg() -> &'static lpc55_pac::inputmux::RegisterBlock {
+    unsafe { &*lpc55_pac::INPUTMUX::ptr() }
+}
+
+/// Get the SYSCON register block.
+///
+/// # Safety
+/// Read/Write operations on a single registers are NOT atomic. You must ensure that the GPIO
+/// registers are not accessed concurrently by multiple threads.
+pub(crate) fn syscon_reg() -> &'static lpc55_pac::syscon::RegisterBlock {
+    unsafe { &*lpc55_pac::SYSCON::ptr() }
+}
+
+/// Get the PINT register block.
+///
+/// # Safety
+/// Read/Write operations on a single registers are NOT atomic. You must ensure that the GPIO
+/// registers are not accessed concurrently by multiple threads.
+pub(crate) fn pint_reg() -> &'static lpc55_pac::pint::RegisterBlock {
+    unsafe { &*lpc55_pac::PINT::ptr() }
+}
+
+/// Match the pin bank and number of a pin to the corresponding IOCON register.
+///
+/// # Example
+/// ```
+/// use embassy_nxp::gpio::Bank;
+/// use embassy_nxp::pac_utils::{iocon_reg, match_iocon};
+///
+/// // Make pin PIO1_6 digital and set it to pull-down mode.
+/// match_iocon!(register, iocon_reg(), Bank::Bank1, 6, {
+///     register.modify(|_, w| w.mode().pull_down().digimode().digital());
+/// });
+/// ```
+macro_rules! match_iocon {
+    ($register:ident, $iocon_register:expr, $pin_bank:expr, $pin_number:expr, $action:expr) => {
+        match ($pin_bank, $pin_number) {
+            (Bank::Bank0, 0) => {
+                let $register = &($iocon_register).pio0_0;
+                $action;
+            }
+            (Bank::Bank0, 1) => {
+                let $register = &($iocon_register).pio0_1;
+                $action;
+            }
+            (Bank::Bank0, 2) => {
+                let $register = &($iocon_register).pio0_2;
+                $action;
+            }
+            (Bank::Bank0, 3) => {
+                let $register = &($iocon_register).pio0_3;
+                $action;
+            }
+            (Bank::Bank0, 4) => {
+                let $register = &($iocon_register).pio0_4;
+                $action;
+            }
+            (Bank::Bank0, 5) => {
+                let $register = &($iocon_register).pio0_5;
+                $action;
+            }
+            (Bank::Bank0, 6) => {
+                let $register = &($iocon_register).pio0_6;
+                $action;
+            }
+            (Bank::Bank0, 7) => {
+                let $register = &($iocon_register).pio0_7;
+                $action;
+            }
+            (Bank::Bank0, 8) => {
+                let $register = &($iocon_register).pio0_8;
+                $action;
+            }
+            (Bank::Bank0, 9) => {
+                let $register = &($iocon_register).pio0_9;
+                $action;
+            }
+            (Bank::Bank0, 10) => {
+                let $register = &($iocon_register).pio0_10;
+                $action;
+            }
+            (Bank::Bank0, 11) => {
+                let $register = &($iocon_register).pio0_11;
+                $action;
+            }
+            (Bank::Bank0, 12) => {
+                let $register = &($iocon_register).pio0_12;
+                $action;
+            }
+            (Bank::Bank0, 13) => {
+                let $register = &($iocon_register).pio0_13;
+                $action;
+            }
+            (Bank::Bank0, 14) => {
+                let $register = &($iocon_register).pio0_14;
+                $action;
+            }
+            (Bank::Bank0, 15) => {
+                let $register = &($iocon_register).pio0_15;
+                $action;
+            }
+            (Bank::Bank0, 16) => {
+                let $register = &($iocon_register).pio0_16;
+                $action;
+            }
+            (Bank::Bank0, 17) => {
+                let $register = &($iocon_register).pio0_17;
+                $action;
+            }
+            (Bank::Bank0, 18) => {
+                let $register = &($iocon_register).pio0_18;
+                $action;
+            }
+            (Bank::Bank0, 19) => {
+                let $register = &($iocon_register).pio0_19;
+                $action;
+            }
+            (Bank::Bank0, 20) => {
+                let $register = &($iocon_register).pio0_20;
+                $action;
+            }
+            (Bank::Bank0, 21) => {
+                let $register = &($iocon_register).pio0_21;
+                $action;
+            }
+            (Bank::Bank0, 22) => {
+                let $register = &($iocon_register).pio0_22;
+                $action;
+            }
+            (Bank::Bank0, 23) => {
+                let $register = &($iocon_register).pio0_23;
+                $action;
+            }
+            (Bank::Bank0, 24) => {
+                let $register = &($iocon_register).pio0_24;
+                $action;
+            }
+            (Bank::Bank0, 25) => {
+                let $register = &($iocon_register).pio0_25;
+                $action;
+            }
+            (Bank::Bank0, 26) => {
+                let $register = &($iocon_register).pio0_26;
+                $action;
+            }
+            (Bank::Bank0, 27) => {
+                let $register = &($iocon_register).pio0_27;
+                $action;
+            }
+            (Bank::Bank0, 28) => {
+                let $register = &($iocon_register).pio0_28;
+                $action;
+            }
+            (Bank::Bank0, 29) => {
+                let $register = &($iocon_register).pio0_29;
+                $action;
+            }
+            (Bank::Bank0, 30) => {
+                let $register = &($iocon_register).pio0_30;
+                $action;
+            }
+            (Bank::Bank0, 31) => {
+                let $register = &($iocon_register).pio0_31;
+                $action;
+            }
+            (Bank::Bank1, 0) => {
+                let $register = &($iocon_register).pio1_0;
+                $action;
+            }
+            (Bank::Bank1, 1) => {
+                let $register = &($iocon_register).pio1_1;
+                $action;
+            }
+            (Bank::Bank1, 2) => {
+                let $register = &($iocon_register).pio1_2;
+                $action;
+            }
+            (Bank::Bank1, 3) => {
+                let $register = &($iocon_register).pio1_3;
+                $action;
+            }
+            (Bank::Bank1, 4) => {
+                let $register = &($iocon_register).pio1_4;
+                $action;
+            }
+            (Bank::Bank1, 5) => {
+                let $register = &($iocon_register).pio1_5;
+                $action;
+            }
+            (Bank::Bank1, 6) => {
+                let $register = &($iocon_register).pio1_6;
+                $action;
+            }
+            (Bank::Bank1, 7) => {
+                let $register = &($iocon_register).pio1_7;
+                $action;
+            }
+            (Bank::Bank1, 8) => {
+                let $register = &($iocon_register).pio1_8;
+                $action;
+            }
+            (Bank::Bank1, 9) => {
+                let $register = &($iocon_register).pio1_9;
+                $action;
+            }
+            (Bank::Bank1, 10) => {
+                let $register = &($iocon_register).pio1_10;
+                $action;
+            }
+            (Bank::Bank1, 11) => {
+                let $register = &($iocon_register).pio1_11;
+                $action;
+            }
+            (Bank::Bank1, 12) => {
+                let $register = &($iocon_register).pio1_12;
+                $action;
+            }
+            (Bank::Bank1, 13) => {
+                let $register = &($iocon_register).pio1_13;
+                $action;
+            }
+            (Bank::Bank1, 14) => {
+                let $register = &($iocon_register).pio1_14;
+                $action;
+            }
+            (Bank::Bank1, 15) => {
+                let $register = &($iocon_register).pio1_15;
+                $action;
+            }
+            (Bank::Bank1, 16) => {
+                let $register = &($iocon_register).pio1_16;
+                $action;
+            }
+            (Bank::Bank1, 17) => {
+                let $register = &($iocon_register).pio1_17;
+                $action;
+            }
+            (Bank::Bank1, 18) => {
+                let $register = &($iocon_register).pio1_18;
+                $action;
+            }
+            (Bank::Bank1, 19) => {
+                let $register = &($iocon_register).pio1_19;
+                $action;
+            }
+            (Bank::Bank1, 20) => {
+                let $register = &($iocon_register).pio1_20;
+                $action;
+            }
+            (Bank::Bank1, 21) => {
+                let $register = &($iocon_register).pio1_21;
+                $action;
+            }
+            (Bank::Bank1, 22) => {
+                let $register = &($iocon_register).pio1_22;
+                $action;
+            }
+            (Bank::Bank1, 23) => {
+                let $register = &($iocon_register).pio1_23;
+                $action;
+            }
+            (Bank::Bank1, 24) => {
+                let $register = &($iocon_register).pio1_24;
+                $action;
+            }
+            (Bank::Bank1, 25) => {
+                let $register = &($iocon_register).pio1_25;
+                $action;
+            }
+            (Bank::Bank1, 26) => {
+                let $register = &($iocon_register).pio1_26;
+                $action;
+            }
+            (Bank::Bank1, 27) => {
+                let $register = &($iocon_register).pio1_27;
+                $action;
+            }
+            (Bank::Bank1, 28) => {
+                let $register = &($iocon_register).pio1_28;
+                $action;
+            }
+            (Bank::Bank1, 29) => {
+                let $register = &($iocon_register).pio1_29;
+                $action;
+            }
+            (Bank::Bank1, 30) => {
+                let $register = &($iocon_register).pio1_30;
+                $action;
+            }
+            (Bank::Bank1, 31) => {
+                let $register = &($iocon_register).pio1_31;
+                $action;
+            }
+            _ => unreachable!(),
+        }
+    };
+}
+
+pub(crate) use match_iocon;

embassy-nxp/src/pint.rs

@@ -0,0 +1,440 @@
+//! Pin Interrupt module.
+use core::cell::RefCell;
+use core::future::Future;
+use core::pin::Pin as FuturePin;
+use core::task::{Context, Poll};
+
+use critical_section::Mutex;
+use embassy_hal_internal::{Peripheral, PeripheralRef};
+use embassy_sync::waitqueue::AtomicWaker;
+
+use crate::gpio::{self, AnyPin, Level, SealedPin};
+use crate::pac::interrupt;
+use crate::pac_utils::*;
+
+struct PinInterrupt {
+    assigned: bool,
+    waker: AtomicWaker,
+    /// If true, the interrupt was triggered due to this PinInterrupt. This is used to determine if
+    /// an [InputFuture] should return Poll::Ready.
+    at_fault: bool,
+}
+
+impl PinInterrupt {
+    pub fn interrupt_active(&self) -> bool {
+        self.assigned
+    }
+
+    /// Mark the interrupt as assigned to a pin.
+    pub fn enable(&mut self) {
+        self.assigned = true;
+        self.at_fault = false;
+    }
+
+    /// Mark the interrupt as available.
+    pub fn disable(&mut self) {
+        self.assigned = false;
+        self.at_fault = false;
+    }
+
+    /// Returns true if the interrupt was triggered due to this PinInterrupt.
+    ///
+    /// If this function returns true, it will also reset the at_fault flag.
+    pub fn at_fault(&mut self) -> bool {
+        let val = self.at_fault;
+        self.at_fault = false;
+        val
+    }
+
+    /// Set the at_fault flag to true.
+    pub fn fault(&mut self) {
+        self.at_fault = true;
+    }
+}
+
+const NEW_PIN_INTERRUPT: PinInterrupt = PinInterrupt {
+    assigned: false,
+    waker: AtomicWaker::new(),
+    at_fault: false,
+};
+const INTERUPT_COUNT: usize = 8;
+static PIN_INTERRUPTS: Mutex<RefCell<[PinInterrupt; INTERUPT_COUNT]>> =
+    Mutex::new(RefCell::new([NEW_PIN_INTERRUPT; INTERUPT_COUNT]));
+
+fn next_available_interrupt() -> Option<usize> {
+    critical_section::with(|cs| {
+        for (i, pin_interrupt) in PIN_INTERRUPTS.borrow(cs).borrow().iter().enumerate() {
+            if !pin_interrupt.interrupt_active() {
+                return Some(i);
+            }
+        }
+
+        None
+    })
+}
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+enum Edge {
+    Rising,
+    Falling,
+    Both,
+}
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+enum InterruptOn {
+    Level(Level),
+    Edge(Edge),
+}
+
+pub(crate) fn init() {
+    syscon_reg().ahbclkctrl0.modify(|_, w| w.pint().enable());
+
+    // Enable interrupts
+    unsafe {
+        crate::pac::NVIC::unmask(crate::pac::Interrupt::PIN_INT0);
+        crate::pac::NVIC::unmask(crate::pac::Interrupt::PIN_INT1);
+        crate::pac::NVIC::unmask(crate::pac::Interrupt::PIN_INT2);
+        crate::pac::NVIC::unmask(crate::pac::Interrupt::PIN_INT3);
+        crate::pac::NVIC::unmask(crate::pac::Interrupt::PIN_INT4);
+        crate::pac::NVIC::unmask(crate::pac::Interrupt::PIN_INT5);
+        crate::pac::NVIC::unmask(crate::pac::Interrupt::PIN_INT6);
+        crate::pac::NVIC::unmask(crate::pac::Interrupt::PIN_INT7);
+    };
+}
+
+#[must_use = "futures do nothing unless you `.await` or poll them"]
+struct InputFuture<'d> {
+    #[allow(dead_code)]
+    pin: PeripheralRef<'d, AnyPin>,
+    interrupt_number: usize,
+}
+
+impl<'d> InputFuture<'d> {
+    /// Create a new input future. Returns None if all interrupts are in use.
+    fn new(pin: impl Peripheral<P = impl gpio::Pin> + 'd, interrupt_on: InterruptOn) -> Option<Self> {
+        let pin = pin.into_ref().map_into();
+        let interrupt_number = next_available_interrupt()?;
+
+        // Clear interrupt, just in case
+        pint_reg()
+            .rise
+            .write(|w| unsafe { w.rdet().bits(1 << interrupt_number) });
+        pint_reg()
+            .fall
+            .write(|w| unsafe { w.fdet().bits(1 << interrupt_number) });
+
+        // Enable input multiplexing on pin interrupt register 0 for pin (32*bank + pin_number)
+        inputmux_reg().pintsel[interrupt_number]
+            .write(|w| unsafe { w.intpin().bits(32 * pin.pin_bank() as u8 + pin.pin_number()) });
+
+        match interrupt_on {
+            InterruptOn::Level(level) => {
+                // Set pin interrupt register to edge sensitive or level sensitive
+                // 0 = edge sensitive, 1 = level sensitive
+                pint_reg()
+                    .isel
+                    .modify(|r, w| unsafe { w.bits(r.bits() | (1 << interrupt_number)) });
+
+                // Enable level interrupt.
+                //
+                // Note: Level sensitive interrupts are enabled by the same register as rising edge
+                // is activated.
+
+                // 0 = no-op, 1 = enable
+                pint_reg()
+                    .sienr
+                    .write(|w| unsafe { w.setenrl().bits(1 << interrupt_number) });
+
+                // Set active level
+                match level {
+                    Level::Low => {
+                        // 0 = no-op, 1 = select LOW
+                        pint_reg()
+                            .cienf
+                            .write(|w| unsafe { w.cenaf().bits(1 << interrupt_number) });
+                    }
+                    Level::High => {
+                        // 0 = no-op, 1 = select HIGH
+                        pint_reg()
+                            .sienf
+                            .write(|w| unsafe { w.setenaf().bits(1 << interrupt_number) });
+                    }
+                }
+            }
+            InterruptOn::Edge(edge) => {
+                // Set pin interrupt register to edge sensitive or level sensitive
+                // 0 = edge sensitive, 1 = level sensitive
+                pint_reg()
+                    .isel
+                    .modify(|r, w| unsafe { w.bits(r.bits() & !(1 << interrupt_number)) });
+
+                // Enable rising/falling edge detection
+                match edge {
+                    Edge::Rising => {
+                        // 0 = no-op, 1 = enable rising edge
+                        pint_reg()
+                            .sienr
+                            .write(|w| unsafe { w.setenrl().bits(1 << interrupt_number) });
+                        // 0 = no-op, 1 = disable falling edge
+                        pint_reg()
+                            .cienf
+                            .write(|w| unsafe { w.cenaf().bits(1 << interrupt_number) });
+                    }
+                    Edge::Falling => {
+                        // 0 = no-op, 1 = enable falling edge
+                        pint_reg()
+                            .sienf
+                            .write(|w| unsafe { w.setenaf().bits(1 << interrupt_number) });
+                        // 0 = no-op, 1 = disable rising edge
+                        pint_reg()
+                            .cienr
+                            .write(|w| unsafe { w.cenrl().bits(1 << interrupt_number) });
+                    }
+                    Edge::Both => {
+                        // 0 = no-op, 1 = enable
+                        pint_reg()
+                            .sienr
+                            .write(|w| unsafe { w.setenrl().bits(1 << interrupt_number) });
+                        pint_reg()
+                            .sienf
+                            .write(|w| unsafe { w.setenaf().bits(1 << interrupt_number) });
+                    }
+                }
+            }
+        }
+
+        critical_section::with(|cs| {
+            let mut pin_interrupts = PIN_INTERRUPTS.borrow(cs).borrow_mut();
+            let pin_interrupt = &mut pin_interrupts[interrupt_number];
+
+            pin_interrupt.enable();
+        });
+
+        Some(Self { pin, interrupt_number })
+    }
+
+    /// Returns true if the interrupt was triggered for this pin.
+    fn interrupt_triggered(&self) -> bool {
+        let interrupt_number = self.interrupt_number;
+
+        // Initially, we determine if the interrupt was triggered by this InputFuture by checking
+        // the flags of the interrupt_number. However, by the time we get to this point, the
+        // interrupt may have been triggered again, so we needed to clear the cpu flags immediately.
+        // As a solution, we mark which [PinInterrupt] is responsible for the interrupt ("at fault")
+        critical_section::with(|cs| {
+            let mut pin_interrupts = PIN_INTERRUPTS.borrow(cs).borrow_mut();
+            let pin_interrupt = &mut pin_interrupts[interrupt_number];
+
+            pin_interrupt.at_fault()
+        })
+    }
+}
+
+impl<'d> Drop for InputFuture<'d> {
+    fn drop(&mut self) {
+        let interrupt_number = self.interrupt_number;
+
+        // Disable pin interrupt
+        // 0 = no-op, 1 = disable
+        pint_reg()
+            .cienr
+            .write(|w| unsafe { w.cenrl().bits(1 << interrupt_number) });
+        pint_reg()
+            .cienf
+            .write(|w| unsafe { w.cenaf().bits(1 << interrupt_number) });
+
+        critical_section::with(|cs| {
+            let mut pin_interrupts = PIN_INTERRUPTS.borrow(cs).borrow_mut();
+            let pin_interrupt = &mut pin_interrupts[interrupt_number];
+
+            pin_interrupt.disable();
+        });
+    }
+}
+
+impl<'d> Future for InputFuture<'d> {
+    type Output = ();
+
+    fn poll(self: FuturePin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let interrupt_number = self.interrupt_number;
+
+        critical_section::with(|cs| {
+            let mut pin_interrupts = PIN_INTERRUPTS.borrow(cs).borrow_mut();
+            let pin_interrupt = &mut pin_interrupts[interrupt_number];
+
+            pin_interrupt.waker.register(cx.waker());
+        });
+
+        if self.interrupt_triggered() {
+            Poll::Ready(())
+        } else {
+            Poll::Pending
+        }
+    }
+}
+
+fn handle_interrupt(interrupt_number: usize) {
+    pint_reg()
+        .rise
+        .write(|w| unsafe { w.rdet().bits(1 << interrupt_number) });
+    pint_reg()
+        .fall
+        .write(|w| unsafe { w.fdet().bits(1 << interrupt_number) });
+
+    critical_section::with(|cs| {
+        let mut pin_interrupts = PIN_INTERRUPTS.borrow(cs).borrow_mut();
+        let pin_interrupt = &mut pin_interrupts[interrupt_number];
+
+        pin_interrupt.fault();
+        pin_interrupt.waker.wake();
+    });
+}
+
+#[allow(non_snake_case)]
+#[interrupt]
+fn PIN_INT0() {
+    handle_interrupt(0);
+}
+
+#[allow(non_snake_case)]
+#[interrupt]
+fn PIN_INT1() {
+    handle_interrupt(1);
+}
+
+#[allow(non_snake_case)]
+#[interrupt]
+fn PIN_INT2() {
+    handle_interrupt(2);
+}
+
+#[allow(non_snake_case)]
+#[interrupt]
+fn PIN_INT3() {
+    handle_interrupt(3);
+}
+
+#[allow(non_snake_case)]
+#[interrupt]
+fn PIN_INT4() {
+    handle_interrupt(4);
+}
+
+#[allow(non_snake_case)]
+#[interrupt]
+fn PIN_INT5() {
+    handle_interrupt(5);
+}
+
+#[allow(non_snake_case)]
+#[interrupt]
+fn PIN_INT6() {
+    handle_interrupt(6);
+}
+
+#[allow(non_snake_case)]
+#[interrupt]
+fn PIN_INT7() {
+    handle_interrupt(7);
+}
+
+impl gpio::Flex<'_> {
+    /// Wait for a falling or rising edge on the pin. You can have at most 8 pins waiting. If you
+    /// try to wait for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_any_edge(&mut self) -> Option<()> {
+        InputFuture::new(&mut self.pin, InterruptOn::Edge(Edge::Both))?.await;
+        Some(())
+    }
+
+    /// Wait for a falling edge on the pin. You can have at most 8 pins waiting. If you try to wait
+    /// for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_falling_edge(&mut self) -> Option<()> {
+        InputFuture::new(&mut self.pin, InterruptOn::Edge(Edge::Falling))?.await;
+        Some(())
+    }
+
+    /// Wait for a rising edge on the pin. You can have at most 8 pins waiting. If you try to wait
+    /// for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_rising_edge(&mut self) -> Option<()> {
+        InputFuture::new(&mut self.pin, InterruptOn::Edge(Edge::Rising))?.await;
+        Some(())
+    }
+
+    /// Wait for a low level on the pin. You can have at most 8 pins waiting. If you try to wait for
+    /// more than 8 pins, this function will return `None`.
+    pub async fn wait_for_low(&mut self) -> Option<()> {
+        InputFuture::new(&mut self.pin, InterruptOn::Level(Level::Low))?.await;
+        Some(())
+    }
+
+    /// Wait for a high level on the pin. You can have at most 8 pins waiting. If you try to wait for
+    /// more than 8 pins, this function will return `None`.
+    pub async fn wait_for_high(&mut self) -> Option<()> {
+        InputFuture::new(&mut self.pin, InterruptOn::Level(Level::High))?.await;
+        Some(())
+    }
+}
+
+impl gpio::Input<'_> {
+    /// Wait for a falling or rising edge on the pin. You can have at most 8 pins waiting. If you
+    /// try to wait for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_any_edge(&mut self) -> Option<()> {
+        self.pin.wait_for_any_edge().await
+    }
+
+    /// Wait for a falling edge on the pin. You can have at most 8 pins waiting. If you try to wait
+    /// for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_falling_edge(&mut self) -> Option<()> {
+        self.pin.wait_for_falling_edge().await
+    }
+
+    /// Wait for a rising edge on the pin. You can have at most 8 pins waiting. If you try to wait
+    /// for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_rising_edge(&mut self) -> Option<()> {
+        self.pin.wait_for_rising_edge().await
+    }
+
+    /// Wait for a low level on the pin. You can have at most 8 pins waiting. If you try to wait for
+    /// more than 8 pins, this function will return `None`.
+    pub async fn wait_for_low(&mut self) -> Option<()> {
+        self.pin.wait_for_low().await
+    }
+
+    /// Wait for a high level on the pin. You can have at most 8 pins waiting. If you try to wait for
+    /// more than 8 pins, this function will return `None`.
+    pub async fn wait_for_high(&mut self) -> Option<()> {
+        self.pin.wait_for_high().await
+    }
+}
+
+impl gpio::Output<'_> {
+    /// Wait for a falling or rising edge on the pin. You can have at most 8 pins waiting. If you
+    /// try to wait for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_any_edge(&mut self) -> Option<()> {
+        self.pin.wait_for_any_edge().await
+    }
+
+    /// Wait for a falling edge on the pin. You can have at most 8 pins waiting. If you try to wait
+    /// for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_falling_edge(&mut self) -> Option<()> {
+        self.pin.wait_for_falling_edge().await
+    }
+
+    /// Wait for a rising edge on the pin. You can have at most 8 pins waiting. If you try to wait
+    /// for more than 8 pins, this function will return `None`.
+    pub async fn wait_for_rising_edge(&mut self) -> Option<()> {
+        self.pin.wait_for_rising_edge().await
+    }
+
+    /// Wait for a low level on the pin. You can have at most 8 pins waiting. If you try to wait for
+    /// more than 8 pins, this function will return `None`.
+    pub async fn wait_for_low(&mut self) -> Option<()> {
+        self.pin.wait_for_low().await
+    }
+
+    /// Wait for a high level on the pin. You can have at most 8 pins waiting. If you try to wait for
+    /// more than 8 pins, this function will return `None`.
+    pub async fn wait_for_high(&mut self) -> Option<()> {
+        self.pin.wait_for_high().await
+    }
+}

examples/lpc55s69/.cargo/config.toml

@@ -0,0 +1,8 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+runner = "probe-rs run --chip LPC55S69JBD100"
+
+[build]
+target = "thumbv8m.main-none-eabihf"
+
+[env]
+DEFMT_LOG = "debug"

examples/lpc55s69/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+edition = "2021"
+name = "embassy-nxp-lpc55s69-examples"
+version = "0.1.0"
+license = "MIT OR Apache-2.0"
+
+
+[dependencies]
+embassy-nxp = { version = "0.1.0", path = "../../embassy-nxp", features = ["rt"] }
+embassy-executor = { version = "0.6.0", path = "../../embassy-executor", features = ["task-arena-size-32768", "arch-cortex-m", "executor-thread", "executor-interrupt"] }
+embassy-sync = { version = "0.6.0", path = "../../embassy-sync", features = ["defmt"] }
+embassy-time = { version = "0.3.0", path = "../../embassy-time", features = ["defmt"] }
+panic-halt = "0.2.0"
+cortex-m = { version = "0.7.6", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = {version = "0.7.0"}
+defmt = "0.3"
+defmt-rtt = "0.4"
+panic-probe = { version = "0.3.2", features = ["print-defmt"] }
+panic-semihosting = "0.6.0"
+
+[profile.release]
+debug = 2

examples/lpc55s69/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");
+}

examples/lpc55s69/memory.x

@@ -0,0 +1,28 @@
+/* File originally from lpc55-hal repo: https://github.com/lpc55/lpc55-hal/blob/main/memory.x */ 
+MEMORY
+{
+  FLASH : ORIGIN = 0x00000000, LENGTH = 512K
+
+  /* for use with standard link.x */
+  RAM : ORIGIN = 0x20000000, LENGTH = 256K
+
+  /* would be used with proper link.x */
+  /* needs changes to r0 (initialization code) */
+  /* SRAM0 : ORIGIN = 0x20000000, LENGTH = 64K */
+  /* SRAM1 : ORIGIN = 0x20010000, LENGTH = 64K */
+  /* SRAM2 : ORIGIN = 0x20020000, LENGTH = 64K */
+  /* SRAM3 : ORIGIN = 0x20030000, LENGTH = 64K */
+
+  /* CASPER SRAM regions */
+  /* SRAMX0: ORIGIN = 0x1400_0000, LENGTH = 4K /1* to 0x1400_0FFF *1/ */
+  /* SRAMX1: ORIGIN = 0x1400_4000, LENGTH = 4K /1* to 0x1400_4FFF *1/ */
+
+  /* USB1 SRAM regin */
+  /* USB1_SRAM : ORIGIN = 0x40100000, LENGTH = 16K */
+
+  /* To define our own USB RAM section in one regular */
+  /* RAM, probably easiest to shorten length of RAM */
+  /* above, and use this freed RAM section */
+
+}
+

examples/lpc55s69/src/bin/blinky_nop.rs

@@ -0,0 +1,33 @@
+//! This example has been made with the LPCXpresso55S69 board in mind, which has a built-in LED on PIO1_6.
+
+#![no_std]
+#![no_main]
+
+use cortex_m::asm::nop;
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_nxp::gpio::{Level, Output};
+use {defmt_rtt as _, panic_halt as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nxp::init(Default::default());
+
+    let mut led = Output::new(p.PIO1_6, Level::Low);
+
+    loop {
+        info!("led off!");
+        led.set_high();
+
+        for _ in 0..200_000 {
+            nop();
+        }
+
+        info!("led on!");
+        led.set_low();
+
+        for _ in 0..200_000 {
+            nop();
+        }
+    }
+}

examples/lpc55s69/src/bin/button_executor.rs

@@ -0,0 +1,25 @@
+//! This example has been made with the LPCXpresso55S69 board in mind, which has a built-in LED on
+//! PIO1_6 and a button (labeled "user") on PIO1_9.
+
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_nxp::gpio::{Input, Level, Output, Pull};
+use {defmt_rtt as _, panic_halt as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) -> ! {
+    let p = embassy_nxp::init(Default::default());
+
+    let mut led = Output::new(p.PIO1_6, Level::Low);
+    let mut button = Input::new(p.PIO1_9, Pull::Up);
+
+    info!("Entered main loop");
+    loop {
+        button.wait_for_rising_edge().await;
+        info!("Button pressed");
+        led.toggle();
+    }
+}