Device crate created with svd2rust @ https://github.com/japaric/cortex-m-quickstart/blob/2cd4ea31e5b1dd4da2d9ed70b5756efddfa0a96a/examples/device.rs#L3
Split into directories using form @ https://github.com/djmcgill/form
Formatted with cargo fmt.
nRF51822: https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF51822