Naming and design tweaks

Cargo.toml

@@ -25,7 +25,7 @@ log = "0.4.8"
 [features]
 default = ["std", "serial2"]
 alloc = []
-std = []
+std = ["alloc"]
 rs4xx = ["serial2/rs4xx"]
 
 [workspace]

dynamixel2-cli/src/bin/dynamixel2/main.rs

@@ -1,6 +1,6 @@
 use std::path::Path;
 use std::time::{Duration, Instant};
-use dynamixel2::transport::serial2::Serial2Port;
+use dynamixel2::serial2::SerialPort;
 
 mod logging;
 mod options;
@@ -152,7 +152,7 @@ fn do_main(options: Options) -> Result<(), ()> {
 	Ok(())
 }
 
-fn open_bus(options: &Options) -> Result<dynamixel2::Bus<Vec<u8>, Vec<u8>, Serial2Port>, ()> {
+fn open_bus(options: &Options) -> Result<dynamixel2::Bus<Vec<u8>, Vec<u8>, SerialPort>, ()> {
 	let bus = dynamixel2::Bus::open(&options.serial_port, options.baud_rate)
 		.map_err(|e| log::error!("Failed to open serial port: {}: {}", options.serial_port.display(), e))?;
 	log::debug!(

src/bus.rs

@@ -1,6 +1,6 @@
 use core::time::Duration;
 use crate::endian::{read_u16_le, read_u32_le, read_u8_le};
-use crate::transport::Transport;
+use crate::serial_port::SerialPort;
 use crate::{ReadError, TransferError, WriteError};
 
 #[cfg(feature = "serial2")]
@@ -13,24 +13,24 @@ use crate::messaging::Messenger;
 use crate::packet::{Packet, STATUS_HEADER_SIZE};
 
 /// Dynamixel Protocol 2 communication bus.
-pub struct Bus<ReadBuffer, WriteBuffer, T: Transport> {
+pub struct Bus<ReadBuffer, WriteBuffer, T: SerialPort> {
 	messenger: Messenger<ReadBuffer, WriteBuffer, T>,
 }
 //
 impl<ReadBuffer, WriteBuffer, T> core::fmt::Debug for Bus<ReadBuffer, WriteBuffer, T>
 where
-	T: Transport + core::fmt::Debug,
+	T: SerialPort + core::fmt::Debug,
 {
 	fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
 		f.debug_struct("Bus")
-			.field("transport", &self.messenger.transport)
+			.field("serial_port", &self.messenger.serial_port)
 			.field("baud_rate", &self.messenger.baud_rate)
 			.finish_non_exhaustive()
 	}
 }
 
 #[cfg(feature = "serial2")]
-impl Bus<Vec<u8>, Vec<u8>, crate::transport::serial2::Serial2Port> {
+impl Bus<Vec<u8>, Vec<u8>, serial2::SerialPort> {
 	/// Open a serial port with the given baud rate.
 	///
 	/// This will allocate a new read and write buffer of 128 bytes each.
@@ -48,14 +48,14 @@ impl Bus<Vec<u8>, Vec<u8>, crate::transport::serial2::Serial2Port> {
 	///
 	/// This will allocate a new read and write buffer of 128 bytes each.
 	/// Use [`Self::with_buffers()`] if you want to use a custom buffers.
-	pub fn new(serial_port: serial2::SerialPort) -> Result<Self, crate::InitializeError<std::io::Error>> {
+	pub fn new(serial_port: serial2::SerialPort) -> std::io::Result<Self> {
 		let messenger = Messenger::with_buffers(serial_port, vec![0; 128], vec![0; 128])?;
 		Ok(Self { messenger })
 	}
 }
 
 #[cfg(feature = "serial2")]
-impl<ReadBuffer, WriteBuffer> Bus<ReadBuffer, WriteBuffer, crate::transport::serial2::Serial2Port>
+impl<ReadBuffer, WriteBuffer> Bus<ReadBuffer, WriteBuffer, serial2::SerialPort>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
@@ -79,18 +79,18 @@ impl<ReadBuffer, WriteBuffer, T> Bus<ReadBuffer, WriteBuffer, T>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
-	T: Transport,
+	T: SerialPort,
 {
 	/// Create a new bus using pre-allocated buffers.
 	///
 	/// The serial port must already be configured in raw mode with the correct baud rate,
 	/// character size (8), parity (disabled) and stop bits (1).
 	pub fn with_buffers(
-		transport: T,
+		serial_port: T,
 		read_buffer: ReadBuffer,
 		write_buffer: WriteBuffer,
-	) -> Result<Self, crate::InitializeError<T::Error>> {
-		let messenger = Messenger::with_buffers(transport, read_buffer, write_buffer)?;
+	) -> Result<Self, T::Error> {
+		let messenger = Messenger::with_buffers(serial_port, read_buffer, write_buffer)?;
 		Ok(Self { messenger })
 	}
 
@@ -100,16 +100,16 @@ where
 	/// and may disrupt the communication with the motors.
 	/// In general, it should be safe to read and write to the bus manually in between instructions,
 	/// if the response from the motors has already been received.
-	pub fn transport(&self) -> &T {
-		&self.messenger.transport
+	pub fn serial_port(&self) -> &T {
+		&self.messenger.serial_port
 	}
 
 	/// Consume this bus object to get ownership of the serial port.
 	///
 	/// This discards any data in internal the read buffer of the bus object.
 	/// This is normally not a problem, since all data in the read buffer is also discarded when transmitting a new command.
-	pub fn into_transport(self) -> T {
-		self.messenger.transport
+	pub fn into_serial_port(self) -> T {
+		self.messenger.serial_port
 	}
 
 	/// Get the baud rate of the bus.

src/device.rs

@@ -1,31 +1,31 @@
 use crate::endian::read_u16_le;
 use crate::instructions::instruction_id;
 use crate::messaging::Messenger;
-use crate::{InvalidParameterCount, Packet, ReadError, Transport, WriteError};
+use crate::{InvalidParameterCount, Packet, ReadError, SerialPort, WriteError};
 use core::time::Duration;
 
 #[cfg(feature = "alloc")]
 use alloc::{borrow::ToOwned, vec::Vec};
 
 /// Dynamixel [`Device`] for communicating with a [`Bus`].
-pub struct Device<ReadBuffer, WriteBuffer, T: Transport> {
+pub struct Device<ReadBuffer, WriteBuffer, T: SerialPort> {
 	messenger: Messenger<ReadBuffer, WriteBuffer, T>,
 }
 
 impl<ReadBuffer, WriteBuffer, T> core::fmt::Debug for Device<ReadBuffer, WriteBuffer, T>
 where
-	T: Transport + core::fmt::Debug,
+	T: SerialPort + core::fmt::Debug,
 {
 	fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
 		f.debug_struct("Device")
-			.field("transport", &self.messenger.transport)
+			.field("serial_port", &self.messenger.serial_port)
 			.field("baud_rate", &self.messenger.baud_rate)
 			.finish_non_exhaustive()
 	}
 }
 
 #[cfg(feature = "serial2")]
-impl Device<Vec<u8>, Vec<u8>, crate::transport::serial2::Serial2Port> {
+impl Device<Vec<u8>, Vec<u8>, serial2::SerialPort> {
 	/// Open a serial port with the given baud rate.
 	///
 	/// This will allocate a new read and write buffer of 128 bytes each.
@@ -43,14 +43,14 @@ impl Device<Vec<u8>, Vec<u8>, crate::transport::serial2::Serial2Port> {
 	///
 	/// This will allocate a new read and write buffer of 128 bytes each.
 	/// Use [`Self::with_buffers()`] if you want to use a custom buffers.
-	pub fn new(serial_port: serial2::SerialPort) -> Result<Self, crate::InitializeError<std::io::Error>> {
+	pub fn new(serial_port: serial2::SerialPort) -> std::io::Result<Self> {
 		let messenger = Messenger::with_buffers(serial_port, vec![0; 128], vec![0; 128])?;
 		Ok(Self { messenger })
 	}
 }
 
 #[cfg(feature = "serial2")]
-impl<ReadBuffer, WriteBuffer> Device<ReadBuffer, WriteBuffer, crate::transport::serial2::Serial2Port>
+impl<ReadBuffer, WriteBuffer> Device<ReadBuffer, WriteBuffer, serial2::SerialPort>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
@@ -73,15 +73,15 @@ impl<ReadBuffer, WriteBuffer, T> Device<ReadBuffer, WriteBuffer, T>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
-	T: Transport,
+	T: SerialPort,
 {
 	/// Create a new device using pre-allocated buffers.
 	pub fn with_buffers(
-		transport: impl Into<T>,
+		serial_port: impl Into<T>,
 		read_buffer: ReadBuffer,
 		write_buffer: WriteBuffer,
-	) -> Result<Self, crate::InitializeError<T::Error>> {
-		let messenger = Messenger::with_buffers(transport, read_buffer, write_buffer)?;
+	) -> Result<Self, T::Error> {
+		let messenger = Messenger::with_buffers(serial_port, read_buffer, write_buffer)?;
 		Ok(Device { messenger })
 	}
 
@@ -91,16 +91,16 @@ where
 	/// and may disrupt the communication with the motors.
 	/// In general, it should be safe to read and write to the device manually in between instructions,
 	/// if the response from the motors has already been received.
-	pub fn transport(&self) -> &T {
-		&self.messenger.transport
+	pub fn serial_port(&self) -> &T {
+		&self.messenger.serial_port
 	}
 
 	/// Consume this device object to get ownership of the serial port.
 	///
 	/// This discards any data in internal the read buffer of the device object.
 	/// This is normally not a problem, since all data in the read buffer is also discarded when transmitting a new command.
-	pub fn into_transport(self) -> T {
-		self.messenger.transport
+	pub fn into_serial_port(self) -> T {
+		self.messenger.serial_port
 	}
 
 	/// Get the baud rate of the device.

src/error.rs

@@ -1,16 +1,6 @@
 use crate::instructions::packet_id::BROADCAST;
 use core::fmt::{Debug, Display, Formatter, Result as FmtResult};
 
-/// An error that can occur while initializing a bus.
-#[derive(Debug)]
-pub enum InitializeError<E> {
-	/// Failed to get the configuration of the serial port.
-	GetConfiguration(E),
-
-	/// Failed to get the baud rate from the configuration of the serial port.
-	GetBaudRate(E),
-}
-
 /// An error that can occur during a read/write transfer.
 #[derive(Debug)]
 pub enum TransferError<E> {
@@ -56,9 +46,6 @@ pub enum ReadError<E> {
 	/// Failed to read from the serial port.
 	Io(E),
 
-	/// A timeout occurred while waiting for a response.
-	Timeout,
-
 	/// The received message is invalid.
 	InvalidMessage(InvalidMessage),
 
@@ -301,8 +288,6 @@ impl InvalidParameterCount {
 	}
 }
 
-#[cfg(feature = "std")]
-impl<E: Debug + Display> std::error::Error for InitializeError<E> {}
 #[cfg(feature = "std")]
 impl<E: Debug + Display> std::error::Error for TransferError<E> {}
 #[cfg(feature = "std")]
@@ -458,18 +443,6 @@ impl From<InvalidParameterCount> for InvalidMessage {
 	}
 }
 
-impl<E> Display for InitializeError<E>
-where
-	E: Display,
-{
-	fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult {
-		match self {
-			Self::GetConfiguration(e) => write!(f, "failed to get configuration of serial port: {e}"),
-			Self::GetBaudRate(e) => write!(f, "failed to get baud rate of serial port: {e}"),
-		}
-	}
-}
-
 impl<E> Display for TransferError<E>
 where
 	E: Display,
@@ -521,7 +494,6 @@ where
 				e.required_size, e.total_size
 			),
 			Self::Io(e) => write!(f, "failed to read from serial port: {}", e),
-			Self::Timeout => write!(f, "timeout while waiting for response"),
 			Self::InvalidMessage(e) => write!(f, "{}", e),
 			Self::MotorError(e) => write!(f, "{}", e),
 		}

src/instructions/action.rs

@@ -1,12 +1,12 @@
 use super::{instruction_id, packet_id};
-use crate::transport::Transport;
+use crate::serial_port::SerialPort;
 use crate::{Bus, Response, TransferError, WriteError};
 
 impl<ReadBuffer, WriteBuffer, T> Bus<ReadBuffer, WriteBuffer, T>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
-	T: Transport,
+	T: SerialPort,
 {
 	/// Send an action command to trigger a previously registered instruction.
 	///

src/instructions/bulk_read.rs

@@ -1,6 +1,6 @@
 use super::{instruction_id, packet_id, BulkReadData};
 use crate::endian::{write_u16_le, write_u8_le};
-use crate::transport::Transport;
+use crate::serial_port::SerialPort;
 use crate::{Bus, ReadError, Response, WriteError};
 
 #[cfg(feature = "alloc")]
@@ -11,7 +11,7 @@ impl<ReadBuffer, WriteBuffer, T> Bus<ReadBuffer, WriteBuffer, T>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
-	T: Transport,
+	T: SerialPort,
 {
 	/// Synchronously read arbitrary data ranges from multiple motors in one command.
 	///

src/instructions/bulk_write.rs

@@ -1,13 +1,13 @@
 use super::{instruction_id, packet_id, BulkWriteData};
 use crate::endian::{write_u16_le, write_u8_le};
-use crate::transport::Transport;
+use crate::serial_port::SerialPort;
 use crate::{Bus, WriteError};
 
 impl<ReadBuffer, WriteBuffer, T> Bus<ReadBuffer, WriteBuffer, T>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
-	T: Transport,
+	T: SerialPort,
 {
 	/// Synchronously write arbitrary data ranges to multiple motors.
 	///
@@ -93,7 +93,7 @@ where
 mod tests {
 	use super::*;
 
-	type Bus = crate::Bus<Vec<u8>, Vec<u8>, crate::transport::serial2::Serial2Port>;
+	type Bus = crate::Bus<Vec<u8>, Vec<u8>, serial2::SerialPort>;
 
 	/// Ensure that `bulk_write` accepts a slice of `BulkWriteData`.
 	///

src/instructions/clear.rs

@@ -1,5 +1,5 @@
 use super::{instruction_id, packet_id};
-use crate::transport::Transport;
+use crate::serial_port::SerialPort;
 use crate::{Bus, Response, TransferError, WriteError};
 
 /// The parameters for the CLEAR command to clear the revolution counter.
@@ -9,7 +9,7 @@ impl<ReadBuffer, WriteBuffer, T> Bus<ReadBuffer, WriteBuffer, T>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
-	T: Transport,
+	T: SerialPort,
 {
 	/// Clear the multi-revolution counter of a motor.
 	///

src/instructions/factory_reset.rs

@@ -1,5 +1,5 @@
 use super::{instruction_id, packet_id};
-use crate::transport::Transport;
+use crate::serial_port::SerialPort;
 use crate::{Bus, Response, TransferError, WriteError};
 
 /// The kind of factory reset to perform.
@@ -20,7 +20,7 @@ impl<ReadBuffer, WriteBuffer, T> Bus<ReadBuffer, WriteBuffer, T>
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
-	T: Transport,
+	T: SerialPort,
 {
 	/// Reset the settings of a motor to the factory defaults.
 	///

src/instructions/mod.rs

@@ -38,7 +38,7 @@ mod sync_read;
 mod sync_write;
 mod write;
 
-use crate::Transport;
+use crate::SerialPort;
 pub use factory_reset::FactoryResetKind;
 pub use ping::Ping;
 
@@ -113,7 +113,7 @@ fn read_response_if_not_broadcast<ReadBuffer, WriteBuffer, T>(
 where
 	ReadBuffer: AsRef<[u8]> + AsMut<[u8]>,
 	WriteBuffer: AsRef<[u8]> + AsMut<[u8]>,
-	T: Transport,
+	T: SerialPort,
 {
 	if motor_id == packet_id::BROADCAST {
 		Ok(crate::Response {