refractor into proper driver with abstractions and Radio struct, LoRa TX and RX working

src/traits.rs

@@ -0,0 +1,20 @@
+use crate::error::RadioError;
+
+/// Can configure the radio
+pub trait Configure {
+    /// Each modulation has its own `Config` struct
+    type Config;
+
+    async fn configure(&mut self, config: &Self::Config) -> Result<(), RadioError>;
+}
+
+/// Can send data
+pub trait Transmit {
+    async fn tx(&mut self, data: &[u8]) -> Result<(), RadioError>;
+}
+
+/// Can receive data
+pub trait Receive {
+    /// Returns the number of bytes received
+    async fn rx(&mut self, buf: &mut [u8], timeout_ms: u32) -> Result<usize, RadioError>;
+}