Incremental update to README.md

README.md

@@ -1,2 +1,61 @@
 # Embassy RP Skeleton
-TODO
+## Summary
+This project skeleton is intended as a starting point for developing your own firmware for the [`rp2040`][1] based on
+the [`embassy`][2] asynchronous embedded development framework.
+
+It includes all of the [`knurling-rs`][3] tooling ([`defmt`][4], [`defmt-rtt`][4], [`panic-probe`][4], [`flip-link`][5],
+[`probe-run`][6]) to improve the development process.
+
+The default [`Cargo`][7] runner is configured as [`probe-run`][6], so you can build, flash and run your firmware _with_
+output from the device via RTT with:
+
+```shell
+cargo run --release
+```
+
+If you want to use a different runner with your debugger (e.g., [`cargo-embed`][8], [`probe-rs-debugger`][9], etc.) or
+if you _aren't_ using a debugger and want the runner to flash the firmware via USB (e.g., [`elf2uf2-rs`][10],
+[`picotool`][11], etc.) then see the [Runners](#runners) section.
+
+## Table of Contents
+1. [Requirements](#requirements)
+2. [Setup](#setup)
+3. [Usage](#usage)
+4. [Runners](#runners)
+5. [Appendix](#appendix)
+
+## Requirements
+* Rust
+    - Rustup
+    - Cargo
+* Toolchain Support
+    - Nightly
+    - Cortex Target
+* Flip-Link
+* Probe-Run
+* CMSIS-DAP Probe
+
+## Setup
+...
+
+## Usage
+...
+
+## Runners
+...
+
+## Appendix
+...
+
+<!-- Reference -->
+[1]: https://www.raspberrypi.com/documentation/microcontrollers/rp2040.html
+[2]: https://embassy.dev/dev/index.html
+[3]: https://github.com/knurling-rs/app-template
+[4]: https://github.com/knurling-rs/defmt
+[5]: https://github.com/knurling-rs/flip-link
+[6]: https://github.com/knurling-rs/probe-run
+[7]: https://doc.rust-lang.org/cargo/
+[8]: https://github.com/probe-rs/cargo-embed
+[9]: https://github.com/probe-rs/vscode
+[10]: https://github.com/JoNil/elf2uf2-rs
+[11]: https://github.com/raspberrypi/picotool