commit de87c4680da6cacc953294976fc0bfd6738e2e28
Author: Daniel-I-Am <djdecloet@gmail.com>
Date:   Mon Mar 14 15:55:00 2022 +0100

    Initial commit

diff --git a/.cargo/config b/.cargo/config
new file mode 100644
index 0000000..c6ca534
--- /dev/null
+++ b/.cargo/config
@@ -0,0 +1,22 @@
+[build]
+target = "thumbv6m-none-eabi"
+
+[target.thumbv6m-none-eabi]
+# Pass some extra options to rustc, some of which get passed on to the linker.
+#
+# * linker argument --nmagic turns off page alignment of sections (which saves
+#   flash space)
+# * linker argument -Tlink.x tells the linker to use link.x as the linker
+#   script. This is usually provided by the cortex-m-rt crate, and by default
+#   the version in that crate will include a file called `memory.x` which
+#   describes the particular memory layout for your specific chip. 
+# * inline-threshold=5 makes the compiler more aggressive and inlining functions
+# * no-vectorize-loops turns off the loop vectorizer (seeing as the M0+ doesn't
+#   have SIMD)
+rustflags = [
+    "-C", "link-arg=--nmagic",
+    "-C", "link-arg=-Tlink.x",
+    "-C", "inline-threshold=5",
+    "-C", "no-vectorize-loops",
+]
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..96ef862
--- /dev/null
+++ b/.gitignore
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+target/
+.idea/
diff --git a/Cargo.lock b/Cargo.lock
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index 0000000..82ea0f3
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+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+
+[[package]]
+name = "volatile-register"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ee8f19f9d74293faf70901bc20ad067dc1ad390d2cbf1e3f75f721ffee908b6"
+dependencies = [
+ "vcell",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..f2cb712
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,35 @@
+[package]
+name = "blink"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cortex-m = "0.7.2"
+rp2040-boot2 = { version="0.2.0", optional=true }
+rp2040-hal = "0.3.0"
+cortex-m-rt = { version="0.7", optional=true }
+embedded-time = "0.12.0"
+
+embedded-hal = { version = "0.2.5", features = ["unproven"] }
+eh1_0_alpha = { version="=1.0.0-alpha.6", package="embedded-hal", optional=true }
+panic-halt = "0.2.0"
+rp-pico = "0.2.0"
+
+[dev-dependencies]
+cortex-m-rt = "0.7"
+panic-halt = "0.2.0"
+rp2040-boot2 = "0.2.0"
+
+[features]
+default = ["boot2", "rt"]
+boot2 = ["rp2040-boot2"]
+rt = ["cortex-m-rt", "rp2040-hal/rt"]
+
+[profile.dev]
+panic = "abort"
+
+[profile.release]
+panic = "abort"
+
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..79ded54
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,42 @@
+TARGET_ARCH := thumbv6m-none-eabi
+ELF2UF2_BIN := ~/.cargo/bin/elf2uf2-rs
+
+PROJECT_NAME := $(shell grep -E "name ?= ?\".*\"" Cargo.toml | grep -oP "(?<=\").*(?=\")")
+SRC_FILES := $(shell find src -type f)
+
+DEFAULT_TARGET := help
+
+.PHONY: help
+help: ## Display this help messag
+	@echo "Please use \`make <target>' where <target> is one of"
+	@grep '^[a-zA-Z]' $(MAKEFILE_LIST) | sort | awk -F ':.*?## ' 'NF==2 {printf "\033[36m  %-25s\033[0m %s\n", $$1, $$2}'
+
+.PHONY: build
+build: target/$(TARGET_ARCH)/debug/$(PROJECT_NAME).uf2 ## Build the project
+
+.PHONY: release
+release: target/$(TARGET_ARCH)/release/$(PROJECT_NAME).uf2 ## Build the project for release
+
+.PHONY: install-build
+install-build: build
+	@sudo mount "$$(lsblk -o PATH,LABEL | grep RPI-RP2 | awk '{print $$1}')" /mnt
+	@sudo cp target/$(TARGET_ARCH)/debug/$(PROJECT_NAME).uf2 /mnt/
+
+.PHONY: install-release
+install-release: release
+	@sudo mount "$$(lsblk -o PATH,LABEL | grep RPI-RP2 | awk '{print $$1}')" /mnt
+	@sudo cp target/$(TARGET_ARCH)/release/$(PROJECT_NAME).uf2 /mnt/
+
+Cargo.lock: Cargo.toml
+	@cargo update
+
+target/$(TARGET_ARCH)/%/$(PROJECT_NAME): $(SRC_FILES) Cargo.toml Cargo.lock
+	@if [[ "$@" == *"release"* ]]; then \
+		cargo build --release --target $(TARGET_ARCH); \
+	else \
+		cargo build --target $(TARGET_ARCH); \
+	fi
+
+target/$(TARGET_ARCH)/%/$(PROJECT_NAME).uf2: target/$(TARGET_ARCH)/%/$(PROJECT_NAME)
+	@$(ELF2UF2_BIN) $^ $@
+
diff --git a/memory.x b/memory.x
new file mode 100644
index 0000000..4077aab
--- /dev/null
+++ b/memory.x
@@ -0,0 +1,15 @@
+MEMORY {
+    BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
+    FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
+    RAM   : ORIGIN = 0x20000000, LENGTH = 256K
+}
+
+EXTERN(BOOT2_FIRMWARE)
+
+SECTIONS {
+    /* ### Boot loader */
+    .boot2 ORIGIN(BOOT2) :
+    {
+        KEEP(*(.boot2));
+    } > BOOT2
+} INSERT BEFORE .text;
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..c454061
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,95 @@
+//! # Pico Blinky Example
+//!
+//! Blinks the LED on a Pico board.
+//!
+//! This will blink an LED attached to GP25, which is the pin the Pico uses for
+//! the on-board LED.
+//!
+//! See the `Cargo.toml` file for Copyright and licence details.
+
+#![no_std]
+#![no_main]
+
+// The macro for our start-up function
+use cortex_m_rt::entry;
+
+// GPIO traits
+use embedded_hal::digital::v2::OutputPin;
+
+// Time handling traits
+use embedded_time::rate::*;
+
+// Ensure we halt the program on panic (if we don't mention this crate it won't
+// be linked)
+use panic_halt as _;
+
+// Pull in any important traits
+use rp_pico::hal::prelude::*;
+
+// A shorter alias for the Peripheral Access Crate, which provides low-level
+// register access
+use rp_pico::hal::pac;
+
+// A shorter alias for the Hardware Abstraction Layer, which provides
+// higher-level drivers.
+use rp_pico::hal;
+
+/// Entry point to our bare-metal application.
+///
+/// The `#[entry]` macro ensures the Cortex-M start-up code calls this function
+/// as soon as all global variables are initialised.
+///
+/// The function configures the RP2040 peripherals, then blinks the LED in an
+/// infinite loop.
+#[entry]
+fn main() -> ! {
+    // Grab our singleton objects
+    let mut pac = pac::Peripherals::take().unwrap();
+    let core = pac::CorePeripherals::take().unwrap();
+
+    // Set up the watchdog driver - needed by the clock setup code
+    let mut watchdog = hal::Watchdog::new(pac.WATCHDOG);
+
+    // Configure the clocks
+    //
+    // The default is to generate a 125 MHz system clock
+    let clocks = hal::clocks::init_clocks_and_plls(
+        rp_pico::XOSC_CRYSTAL_FREQ,
+        pac.XOSC,
+        pac.CLOCKS,
+        pac.PLL_SYS,
+        pac.PLL_USB,
+        &mut pac.RESETS,
+        &mut watchdog,
+    )
+        .ok()
+        .unwrap();
+
+    // The delay object lets us wait for specified amounts of time (in
+    // milliseconds)
+    let mut delay = cortex_m::delay::Delay::new(core.SYST, clocks.system_clock.freq().integer());
+
+    // The single-cycle I/O block controls our GPIO pins
+    let sio = hal::Sio::new(pac.SIO);
+
+    // Set the pins up according to their function on this particular board
+    let pins = rp_pico::Pins::new(
+        pac.IO_BANK0,
+        pac.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut pac.RESETS,
+    );
+
+    // Set the LED to be an output
+    let mut led_pin = pins.led.into_push_pull_output();
+
+    // Blink the LED at 1 Hz
+    loop {
+        led_pin.set_high().unwrap();
+        delay.delay_ms(500);
+        led_pin.set_low().unwrap();
+        delay.delay_ms(500);
+    }
+}
+
+// End of file