Structure

Cargo.toml

@@ -1,5 +1,9 @@
 [workspace]
 members = [
+    # Device types
+    "node",
+    "master",
+    # Examples
     "examples/playground"
 ]
 

README.md

@@ -4,3 +4,12 @@ Physical is a library for interacting with the physical world from a computer. T
 
 * Collecting and digitizing data from the physical world.
 * Controlling devices that take physical action.
+
+## Concepts
+The main concepts of Physical are:
+* Peripheral: A peripheral is a board that hosts physical I/O and usually does analog to digital conversion or 
+  digital to analog conversion. A peripheral cannot function on its own, it must be connected to a node. This is more 
+  narrow than the 
+  definition of a peripheral in embedded systems generally.
+* Node: A node hosts peripherals. A node can have a master but does not need one.
+* Master: A master hosts nodes. It is possible for a device to be both a node and a master at the same time.

examples/playground/Cargo.toml

@@ -10,9 +10,4 @@ readme.workspace = true
 license.workspace = true
 
 [dependencies]
-thiserror.workspace = true
+physical = { path = "../.." }
-uom.workspace = true
-log.workspace = true
-env_logger.workspace = true
-futures-lite.workspace = true
-async-io.workspace = true

master/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "physical-master"
+description = "A master hosts nodes."
+version.workspace = true
+edition.workspace = true
+repository.workspace = true
+readme.workspace = true
+license.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+physical = { path = ".." }

master/src/lib.rs

@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}

node/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "physical-node"
+description = "A node hosts peripherals."
+version.workspace = true
+edition.workspace = true
+repository.workspace = true
+readme.workspace = true
+license.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+physical = { path = ".." }

node/src/lib.rs

@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}