adds simulated hardware

flight/src/hardware/sim/mcp23017.rs

@@ -0,0 +1,51 @@
+use std::fmt::{Display, Formatter};
+use embedded_hal::i2c::{ErrorKind, ErrorType, I2c, Operation, SevenBitAddress};
+
+pub struct SimMcp23017 {
+
+}
+
+impl SimMcp23017 {
+    pub fn new() -> Self {
+        Self {
+
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct ErrorWrapper(anyhow::Error);
+
+impl embedded_hal::i2c::Error for ErrorWrapper {
+    fn kind(&self) -> ErrorKind {
+        ErrorKind::Other
+    }
+}
+
+impl Display for ErrorWrapper {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        self.0.fmt(f)
+    }
+}
+
+impl std::error::Error for ErrorWrapper {}
+
+impl ErrorType for SimMcp23017 {
+    type Error = ErrorWrapper;
+}
+
+impl I2c for SimMcp23017 {
+    fn transaction(&mut self, _address: SevenBitAddress, operations: &mut [Operation<'_>]) -> Result<(), Self::Error> {
+        for operation in operations {
+            match operation {
+                Operation::Write(_write_buffer) => {
+                    // Ignore incoming write operations
+                }
+                Operation::Read(_read_buffer) => {
+                    todo!("SimMcp23017 read")
+                }
+            }
+        }
+        Ok(())
+    }
+}