libftdi support

sw/deployer/Cargo.toml

@@ -7,21 +7,22 @@ description = "SummerCart64 loader and control software"
 documentation = "https://github.com/Polprzewodnikowy/SummerCart64"
 
 [dependencies]
-chrono = "0.4.23"
-clap = { version = "4.1.6", features = ["derive"] }
-clap-num = "1.0.2"
-colored = "2.0.0"
-crc32fast = "1.3.2"
-ctrlc = "3.2.5"
-encoding_rs = "0.8.32"
+chrono = "0.4.38"
+clap = { version = "4.5.7", features = ["derive"] }
+clap-num = "1.1.1"
+colored = "2.1.0"
+crc32fast = "1.4.2"
+ctrlc = "3.4.4"
+encoding_rs = "0.8.34"
 hex = "0.4.3"
-image = "0.24.5"
+image = "0.25.1"
 include-flate = { version = "0.2.0", features = ["stable"] }
+libftdi1-sys = "1.1.3"
 md5 = "0.7.0"
 panic-message = "0.3.0"
 rand = "0.8.5"
 rust-ini = "0.18.0"
-serial2 = "0.2.20"
+serial2 = "0.2.26"
 serialport = "4.3.0"
 
 [profile.release]

sw/deployer/src/main.rs

@@ -350,7 +350,13 @@ fn handle_list_command() -> Result<(), sc64::Error> {
 
     println!("{}", "Found devices:".bold());
     for (i, d) in devices.iter().enumerate() {
-        println!(" {i}: [{}] at port [{}]", d.serial_number, d.port);
+        let index = i + 1;
+        println!(
+            " {index}: [{}] at port [{}] (using \"{}\" backend)",
+            d.serial.bold(),
+            d.port.bold(),
+            d.backend.to_string().bold()
+        );
     }
 
     Ok(())

sw/deployer/src/sc64/error.rs

@@ -1,3 +1,4 @@
+use super::ftdi::FtdiError;
 use std::fmt::{Display, Formatter, Result};
 
 #[derive(Debug, Clone)]
@@ -32,3 +33,9 @@ impl From<serialport::Error> for Error {
         Error::new(format!("SerialPort error: {}", value.description).as_str())
     }
 }
+
+impl From<FtdiError> for Error {
+    fn from(value: FtdiError) -> Self {
+        Error::new(format!("libftdi error: {}", value.description).as_str())
+    }
+}

sw/deployer/src/sc64/ftdi.rs

@@ -0,0 +1,227 @@
+pub struct FtdiError {
+    pub description: String,
+}
+
+impl FtdiError {
+    fn malloc() -> FtdiError {
+        FtdiError {
+            description: format!("Couldn't allocate memory for the context"),
+        }
+    }
+
+    fn libftdi(context: *mut libftdi1_sys::ftdi_context) -> FtdiError {
+        let raw = unsafe { std::ffi::CStr::from_ptr(libftdi1_sys::ftdi_get_error_string(context)) };
+        FtdiError {
+            description: format!("{}", raw.to_str().unwrap_or("Unknown error")),
+        }
+    }
+}
+
+impl From<FtdiError> for std::io::Error {
+    fn from(value: FtdiError) -> Self {
+        return Self::new(std::io::ErrorKind::Other, value.description);
+    }
+}
+
+struct Context {
+    context: *mut libftdi1_sys::ftdi_context,
+}
+
+impl Context {
+    fn new() -> Result<Context, FtdiError> {
+        let ctx = unsafe { libftdi1_sys::ftdi_new() };
+        if ctx.is_null() {
+            return Err(FtdiError::malloc());
+        }
+        let context = Context { context: ctx };
+        let result = unsafe {
+            libftdi1_sys::ftdi_set_interface(
+                context.get(),
+                libftdi1_sys::ftdi_interface::INTERFACE_A,
+            )
+        };
+        context.check_result(result)?;
+        Ok(context)
+    }
+
+    fn get(&self) -> *mut libftdi1_sys::ftdi_context {
+        return self.context;
+    }
+
+    fn check_result(&self, result: i32) -> Result<(), FtdiError> {
+        if result < 0 {
+            return Err(FtdiError::libftdi(self.get()));
+        }
+        Ok(())
+    }
+}
+
+impl Drop for Context {
+    fn drop(&mut self) {
+        unsafe { libftdi1_sys::ftdi_free(self.get()) }
+    }
+}
+
+pub struct FtdiDevice {
+    context: Context,
+    read_timeout: std::time::Duration,
+    write_timeout: std::time::Duration,
+}
+
+impl FtdiDevice {
+    pub fn open(
+        port: &str,
+        read_timeout: std::time::Duration,
+        write_timeout: std::time::Duration,
+    ) -> Result<FtdiDevice, FtdiError> {
+        let context = Context::new()?;
+        unsafe {
+            let mode = libftdi1_sys::ftdi_module_detach_mode::AUTO_DETACH_REATACH_SIO_MODULE;
+            (*context.get()).module_detach_mode = mode;
+        }
+        let description = std::ffi::CString::new(port).unwrap_or_default().into_raw();
+        let result = unsafe { libftdi1_sys::ftdi_usb_open_string(context.get(), description) };
+        context.check_result(result)?;
+        let result = unsafe { libftdi1_sys::ftdi_set_latency_timer(context.get(), 1) };
+        context.check_result(result)?;
+        Ok(FtdiDevice {
+            context,
+            read_timeout,
+            write_timeout,
+        })
+    }
+
+    pub fn set_dtr(&self, value: bool) -> Result<(), FtdiError> {
+        let state = if value { 1 } else { 0 };
+        let result = unsafe { libftdi1_sys::ftdi_setdtr(self.context.get(), state) };
+        self.context.check_result(result)?;
+        Ok(())
+    }
+
+    pub fn read_dsr(&self) -> Result<bool, FtdiError> {
+        const DSR_BIT: u16 = 1 << 5;
+        let mut status: u16 = 0;
+        let result = unsafe {
+            libftdi1_sys::ftdi_poll_modem_status(
+                self.context.get(),
+                std::slice::from_mut(&mut status).as_mut_ptr(),
+            )
+        };
+        self.context.check_result(result)?;
+        Ok((status & DSR_BIT) != 0)
+    }
+
+    pub fn read(&self, data: &mut [u8]) -> std::io::Result<usize> {
+        let timeout = std::time::Instant::now();
+        loop {
+            let result = unsafe {
+                libftdi1_sys::ftdi_read_data(
+                    self.context.get(),
+                    data.as_mut_ptr(),
+                    data.len() as i32,
+                )
+            };
+            self.context.check_result(result)?;
+            if result > 0 {
+                return Ok(result as usize);
+            }
+            if timeout.elapsed() > self.read_timeout {
+                return Err(std::io::ErrorKind::TimedOut.into());
+            }
+        }
+    }
+
+    pub fn write(&self, data: &[u8]) -> std::io::Result<usize> {
+        let timeout = std::time::Instant::now();
+        loop {
+            let result = unsafe {
+                libftdi1_sys::ftdi_write_data(self.context.get(), data.as_ptr(), data.len() as i32)
+            };
+            self.context.check_result(result)?;
+            if result > 0 {
+                return Ok(result as usize);
+            }
+            if timeout.elapsed() > self.write_timeout {
+                return Err(std::io::ErrorKind::TimedOut.into());
+            }
+        }
+    }
+
+    pub fn write_all(&self, data: &[u8]) -> std::io::Result<()> {
+        let mut data = data;
+        while !data.is_empty() {
+            let written = self.write(data)?;
+            data = &data[written..];
+        }
+        Ok(())
+    }
+
+    pub fn discard_buffers(&self) -> std::io::Result<()> {
+        let result = unsafe { libftdi1_sys::ftdi_tcioflush(self.context.get()) };
+        self.context.check_result(result)?;
+        Ok(())
+    }
+}
+
+impl Drop for FtdiDevice {
+    fn drop(&mut self) {
+        unsafe { libftdi1_sys::ftdi_usb_close(self.context.get()) };
+    }
+}
+
+pub struct FtdiDeviceInfo {
+    pub port: String,
+    pub serial: String,
+}
+
+pub fn list_ftdi_devices(vendor: u16, product: u16) -> Result<Vec<FtdiDeviceInfo>, FtdiError> {
+    let context = Context::new()?;
+
+    let mut device_list: *mut libftdi1_sys::ftdi_device_list = std::ptr::null_mut();
+    let result = unsafe {
+        libftdi1_sys::ftdi_usb_find_all(
+            context.get(),
+            &mut device_list,
+            vendor as i32,
+            product as i32,
+        )
+    };
+    context.check_result(result)?;
+
+    let mut list: Vec<FtdiDeviceInfo> = vec![];
+
+    let mut serial = [0i8; 128];
+
+    let mut device = device_list;
+    let mut index = 0;
+    while !device.is_null() {
+        let result = unsafe {
+            libftdi1_sys::ftdi_usb_get_strings(
+                context.get(),
+                (*device).dev,
+                std::ptr::null_mut(),
+                0,
+                std::ptr::null_mut(),
+                0,
+                serial.as_mut_ptr(),
+                serial.len() as i32,
+            )
+        };
+
+        if let Ok(()) = context.check_result(result) {
+            list.push(FtdiDeviceInfo {
+                port: format!("i:0x{vendor:04X}:0x{product:04X}:{index}"),
+                serial: unsafe { std::ffi::CStr::from_ptr(serial.as_ptr()) }
+                    .to_string_lossy()
+                    .into_owned(),
+            });
+        }
+
+        device = unsafe { (*device).next };
+        index += 1;
+    }
+
+    unsafe { libftdi1_sys::ftdi_list_free(&mut device_list) }
+
+    Ok(list)
+}

sw/deployer/src/sc64/link.rs

@@ -1,10 +1,13 @@
-use super::error::Error;
+use super::{
+    error::Error,
+    ftdi::{list_ftdi_devices, FtdiDevice, FtdiError},
+};
 use serial2::SerialPort;
 use std::{
     collections::VecDeque,
+    fmt::Display,
     io::{BufReader, BufWriter, ErrorKind, Read, Write},
     net::TcpStream,
-    thread,
     time::{Duration, Instant},
 };
 
@@ -56,74 +59,54 @@ pub struct Packet {
     pub data: Vec<u8>,
 }
 
-pub struct Serial {
-    serial: SerialPort,
-}
+const SERIAL_PREFIX: &str = "serial://";
+const FTDI_PREFIX: &str = "ftdi://";
 
-impl Serial {
-    fn reset(&self) -> Result<(), Error> {
-        const RESET_WAIT_DURATION: Duration = Duration::from_millis(10);
-        const RESET_RETRY_COUNT: i32 = 100;
-        const FLUSH_TIMEOUT: Duration = Duration::from_secs(1);
+const RESET_TIMEOUT: Duration = Duration::from_secs(1);
+const POLL_TIMEOUT: Duration = Duration::from_millis(1);
+const READ_TIMEOUT: Duration = Duration::from_secs(5);
+const WRITE_TIMEOUT: Duration = Duration::from_secs(5);
 
-        self.serial.set_dtr(true)?;
-        for n in 0..=RESET_RETRY_COUNT {
-            self.serial.discard_buffers()?;
-            thread::sleep(RESET_WAIT_DURATION);
-            if self.serial.read_dsr()? {
-                break;
-            }
-            if n == RESET_RETRY_COUNT {
-                return Err(Error::new("Couldn't reset SC64 device (on)"));
-            }
-        }
+pub trait Backend {
+    fn reset(&mut self) -> Result<(), Error>;
 
-        let flush_timeout = Instant::now();
+    fn close(&self);
 
+    fn read(&mut self, buffer: &mut [u8]) -> std::io::Result<usize>;
+
+    fn write(&mut self, buffer: &[u8]) -> std::io::Result<()>;
+
+    fn flush(&mut self) -> std::io::Result<()>;
+
+    fn purge_incoming_data(&mut self) -> std::io::Result<()> {
+        let timeout = Instant::now();
         loop {
-            match self.serial.read(&mut vec![0; 1]) {
+            match self.read(&mut vec![0; 1]) {
                 Ok(length) => match length {
-                    0 => break,
+                    0 => return Ok(()),
                     _ => {}
                 },
                 Err(error) => match error.kind() {
-                    ErrorKind::TimedOut => break,
-                    _ => {
-                        return Err(Error::new(
-                            format!("Couldn't flush SC64 serial buffer: {error}").as_str(),
-                        ))
-                    }
+                    ErrorKind::TimedOut => return Ok(()),
+                    _ => return Err(error),
                 },
             }
-            if flush_timeout.elapsed() >= FLUSH_TIMEOUT {
-                return Err(Error::new("SC64 serial buffer flush took too long"));
+            if timeout.elapsed() >= RESET_TIMEOUT {
+                return Err(std::io::Error::new(
+                    ErrorKind::TimedOut,
+                    "SC64 read buffer flush took too long",
+                ));
             }
         }
-
-        self.serial.set_dtr(false)?;
-        for n in 0..=RESET_RETRY_COUNT {
-            thread::sleep(RESET_WAIT_DURATION);
-            if !self.serial.read_dsr()? {
-                break;
-            }
-            if n == RESET_RETRY_COUNT {
-                return Err(Error::new("Couldn't reset SC64 device (off)"));
-            }
-        }
-
-        Ok(())
     }
 
-    fn read_data(&self, buffer: &mut [u8], block: bool) -> Result<Option<()>, Error> {
-        let timeout = Instant::now();
+    fn try_read(&mut self, buffer: &mut [u8], block: bool) -> Result<Option<()>, Error> {
         let mut position = 0;
         let length = buffer.len();
+        let timeout = Instant::now();
         while position < length {
-            if timeout.elapsed() > Duration::from_secs(10) {
-                return Err(Error::new("Serial read timeout"));
-            }
-            match self.serial.read(&mut buffer[position..length]) {
-                Ok(0) => return Err(Error::new("Unexpected end of serial data")),
+            match self.read(&mut buffer[position..length]) {
+                Ok(0) => return Err(Error::new("Unexpected end of stream data")),
                 Ok(bytes) => position += bytes,
                 Err(error) => match error.kind() {
                     ErrorKind::Interrupted | ErrorKind::TimedOut | ErrorKind::WouldBlock => {
@@ -134,42 +117,47 @@ impl Serial {
                     _ => return Err(error.into()),
                 },
             }
+            if timeout.elapsed() > READ_TIMEOUT {
+                return Err(Error::new("Read timeout"));
+            }
         }
         Ok(Some(()))
     }
 
-    fn read_exact(&self, buffer: &mut [u8]) -> Result<(), Error> {
-        match self.read_data(buffer, true)? {
+    fn try_read_header(&mut self, block: bool) -> Result<Option<[u8; 4]>, Error> {
+        let mut header = [0u8; 4];
+        Ok(self.try_read(&mut header, block)?.map(|_| header))
+    }
+
+    fn read_exact(&mut self, buffer: &mut [u8]) -> Result<(), Error> {
+        match self.try_read(buffer, true)? {
             Some(()) => Ok(()),
-            None => Err(Error::new("Unexpected end of serial data")),
+            None => Err(Error::new("Unexpected end of data")),
         }
     }
 
-    fn read_header(&self, block: bool) -> Result<Option<[u8; 4]>, Error> {
-        let mut header = [0u8; 4];
-        Ok(self.read_data(&mut header, block)?.map(|_| header))
-    }
+    fn send_command(&mut self, command: &Command) -> Result<(), Error> {
+        self.write(b"CMD")?;
+        self.write(&command.id.to_be_bytes())?;
 
-    pub fn send_command(&self, command: &Command) -> Result<(), Error> {
-        self.serial.write_all(b"CMD")?;
-        self.serial.write_all(&command.id.to_be_bytes())?;
-        self.serial.write_all(&command.args[0].to_be_bytes())?;
-        self.serial.write_all(&command.args[1].to_be_bytes())?;
+        self.write(&command.args[0].to_be_bytes())?;
+        self.write(&command.args[1].to_be_bytes())?;
 
-        self.serial.write_all(&command.data)?;
+        self.write(&command.data)?;
 
-        self.serial.flush()?;
+        self.flush()?;
 
         Ok(())
     }
 
-    pub fn process_incoming_data(
-        &self,
+    fn process_incoming_data(
+        &mut self,
         data_type: DataType,
         packets: &mut VecDeque<Packet>,
     ) -> Result<Option<Response>, Error> {
         let block = matches!(data_type, DataType::Response);
-        while let Some(header) = self.read_header(block)? {
+
+        while let Some(header) = self.try_read_header(block)? {
             let (packet_token, error) = (match &header[0..3] {
                 b"CMP" => Ok((false, false)),
                 b"PKT" => Ok((true, false)),
@@ -200,48 +188,115 @@ impl Serial {
     }
 }
 
-pub fn new_serial(port: &str) -> Result<Serial, Error> {
-    let mut serial = SerialPort::open(port, 115_200)?;
-    serial.set_write_timeout(Duration::from_secs(10))?;
-    serial.set_read_timeout(Duration::from_millis(10))?;
-    let backend = Serial { serial };
-    backend.reset()?;
-    Ok(backend)
-}
-
-trait Backend {
-    fn send_command(&mut self, command: &Command) -> Result<(), Error>;
-    fn process_incoming_data(
-        &mut self,
-        data_type: DataType,
-        packets: &mut VecDeque<Packet>,
-    ) -> Result<Option<Response>, Error>;
-    fn close(&self) {}
-}
-
-struct SerialBackend {
-    inner: Serial,
+pub struct SerialBackend {
+    device: SerialPort,
 }
 
 impl Backend for SerialBackend {
-    fn send_command(&mut self, command: &Command) -> Result<(), Error> {
-        self.inner.send_command(command)
+    fn reset(&mut self) -> Result<(), Error> {
+        self.device.set_dtr(true)?;
+        let timeout = Instant::now();
+        loop {
+            self.device.discard_buffers()?;
+            if self.device.read_dsr()? {
+                break;
+            }
+            if timeout.elapsed() > RESET_TIMEOUT {
+                return Err(Error::new("Couldn't reset SC64 device (on)"));
+            }
+        }
+
+        self.purge_incoming_data()?;
+
+        self.device.set_dtr(false)?;
+        let timeout = Instant::now();
+        loop {
+            if !self.device.read_dsr()? {
+                break;
+            }
+            if timeout.elapsed() > RESET_TIMEOUT {
+                return Err(Error::new("Couldn't reset SC64 device (off)"));
+            }
+        }
+
+        Ok(())
     }
 
-    fn process_incoming_data(
-        &mut self,
-        data_type: DataType,
-        packets: &mut VecDeque<Packet>,
-    ) -> Result<Option<Response>, Error> {
-        self.inner.process_incoming_data(data_type, packets)
+    fn close(&self) {}
+
+    fn read(&mut self, buffer: &mut [u8]) -> std::io::Result<usize> {
+        self.device.read(buffer)
+    }
+
+    fn write(&mut self, buffer: &[u8]) -> std::io::Result<()> {
+        self.device.write_all(buffer)
+    }
+
+    fn flush(&mut self) -> std::io::Result<()> {
+        self.device.flush()
     }
 }
 
-fn new_serial_backend(port: &str) -> Result<SerialBackend, Error> {
-    let backend = SerialBackend {
-        inner: new_serial(port)?,
-    };
-    Ok(backend)
+fn new_serial_backend(port: &str) -> std::io::Result<SerialBackend> {
+    let mut serial = SerialPort::open(port, 115_200)?;
+    serial.set_read_timeout(POLL_TIMEOUT)?;
+    serial.set_write_timeout(WRITE_TIMEOUT)?;
+    Ok(SerialBackend { device: serial })
+}
+
+struct FtdiBackend {
+    device: FtdiDevice,
+}
+
+impl Backend for FtdiBackend {
+    fn reset(&mut self) -> Result<(), Error> {
+        self.device.set_dtr(true)?;
+        let timeout = Instant::now();
+        loop {
+            self.device.discard_buffers()?;
+            if self.device.read_dsr()? {
+                break;
+            }
+            if timeout.elapsed() > RESET_TIMEOUT {
+                return Err(Error::new("Couldn't reset SC64 device (on)"));
+            }
+        }
+
+        self.purge_incoming_data()?;
+
+        self.device.set_dtr(false)?;
+        let timeout = Instant::now();
+        loop {
+            if !self.device.read_dsr()? {
+                break;
+            }
+            if timeout.elapsed() > RESET_TIMEOUT {
+                return Err(Error::new("Couldn't reset SC64 device (off)"));
+            }
+        }
+
+        Ok(())
+    }
+
+    fn close(&self) {}
+
+    fn read(&mut self, buffer: &mut [u8]) -> std::io::Result<usize> {
+        self.device.read(buffer)
+    }
+
+    fn write(&mut self, buffer: &[u8]) -> std::io::Result<()> {
+        self.device.write_all(buffer)
+    }
+
+    fn flush(&mut self) -> std::io::Result<()> {
+        Ok(())
+    }
+}
+
+fn new_ftdi_backend(port: &str) -> Result<FtdiBackend, FtdiError> {
+    Ok(FtdiBackend {
+        device: FtdiDevice::open(port, POLL_TIMEOUT, WRITE_TIMEOUT)?,
+    })
 }
 
 struct TcpBackend {
@@ -250,58 +305,40 @@ struct TcpBackend {
     writer: BufWriter<TcpStream>,
 }
 
-impl TcpBackend {
-    fn read_data(&mut self, buffer: &mut [u8], block: bool) -> Result<Option<()>, Error> {
-        let timeout = Instant::now();
-        let mut position = 0;
-        let length = buffer.len();
-        while position < length {
-            if timeout.elapsed() > Duration::from_secs(10) {
-                return Err(Error::new("Stream read timeout"));
-            }
-            match self.reader.read(&mut buffer[position..length]) {
-                Ok(0) => return Err(Error::new("Unexpected end of stream data")),
-                Ok(bytes) => position += bytes,
-                Err(error) => match error.kind() {
-                    ErrorKind::Interrupted | ErrorKind::TimedOut | ErrorKind::WouldBlock => {
-                        if !block && position == 0 {
-                            return Ok(None);
-                        }
-                    }
-                    _ => return Err(error.into()),
-                },
-            }
-        }
-        Ok(Some(()))
-    }
-
-    fn read_exact(&mut self, buffer: &mut [u8]) -> Result<(), Error> {
-        match self.read_data(buffer, true)? {
-            Some(()) => Ok(()),
-            None => Err(Error::new("Unexpected end of stream data")),
-        }
-    }
-
-    fn read_header(&mut self, block: bool) -> Result<Option<[u8; 4]>, Error> {
-        let mut header = [0u8; 4];
-        Ok(self.read_data(&mut header, block)?.map(|_| header))
-    }
-}
-
 impl Backend for TcpBackend {
+    fn reset(&mut self) -> Result<(), Error> {
+        Ok(())
+    }
+
+    fn close(&self) {
+        self.stream.shutdown(std::net::Shutdown::Both).ok();
+    }
+
+    fn read(&mut self, buffer: &mut [u8]) -> std::io::Result<usize> {
+        self.reader.read(buffer)
+    }
+
+    fn write(&mut self, buffer: &[u8]) -> std::io::Result<()> {
+        self.writer.write_all(buffer)
+    }
+
+    fn flush(&mut self) -> std::io::Result<()> {
+        self.writer.flush()
+    }
+
     fn send_command(&mut self, command: &Command) -> Result<(), Error> {
         let payload_data_type: u32 = DataType::Command.into();
-        self.writer.write_all(&payload_data_type.to_be_bytes())?;
+        self.write(&payload_data_type.to_be_bytes())?;
 
-        self.writer.write_all(&command.id.to_be_bytes())?;
-        self.writer.write_all(&command.args[0].to_be_bytes())?;
-        self.writer.write_all(&command.args[1].to_be_bytes())?;
+        self.write(&command.id.to_be_bytes())?;
+        self.write(&command.args[0].to_be_bytes())?;
+        self.write(&command.args[1].to_be_bytes())?;
 
         let command_data_length = command.data.len() as u32;
-        self.writer.write_all(&command_data_length.to_be_bytes())?;
-        self.writer.write_all(&command.data)?;
+        self.write(&command_data_length.to_be_bytes())?;
+        self.write(&command.data)?;
 
-        self.writer.flush()?;
+        self.flush()?;
 
         Ok(())
     }
@@ -312,7 +349,7 @@ impl Backend for TcpBackend {
         packets: &mut VecDeque<Packet>,
     ) -> Result<Option<Response>, Error> {
         let block = matches!(data_type, DataType::Response);
-        while let Some(header) = self.read_header(block)? {
+        while let Some(header) = self.try_read_header(block)? {
             let payload_data_type: DataType = u32::from_be_bytes(header).try_into()?;
             let mut buffer = [0u8; 4];
             match payload_data_type {
@@ -357,17 +394,13 @@ impl Backend for TcpBackend {
 
         Ok(None)
     }
-
-    fn close(&self) {
-        self.stream.shutdown(std::net::Shutdown::Both).ok();
-    }
 }
 
 fn new_tcp_backend(address: &str) -> Result<TcpBackend, Error> {
     let stream = match TcpStream::connect(address) {
         Ok(stream) => {
-            stream.set_write_timeout(Some(Duration::from_secs(10)))?;
-            stream.set_read_timeout(Some(Duration::from_millis(10)))?;
+            stream.set_write_timeout(Some(WRITE_TIMEOUT))?;
+            stream.set_read_timeout(Some(POLL_TIMEOUT))?;
             stream
         }
         Err(error) => {
@@ -385,8 +418,28 @@ fn new_tcp_backend(address: &str) -> Result<TcpBackend, Error> {
     })
 }
 
+fn new_local_backend(port: &str) -> Result<Box<dyn Backend>, Error> {
+    let mut backend: Box<dyn Backend> = if port.starts_with(SERIAL_PREFIX) {
+        Box::new(new_serial_backend(
+            port.strip_prefix(SERIAL_PREFIX).unwrap_or_default(),
+        )?)
+    } else if port.starts_with(FTDI_PREFIX) {
+        Box::new(new_ftdi_backend(
+            port.strip_prefix(FTDI_PREFIX).unwrap_or_default(),
+        )?)
+    } else {
+        return Err(Error::new("Invalid port prefix provided"));
+    };
+    backend.reset()?;
+    Ok(backend)
+}
+
+fn new_remote_backend(address: &str) -> Result<Box<dyn Backend>, Error> {
+    Ok(Box::new(new_tcp_backend(address)?))
+}
+
 pub struct Link {
-    backend: Box<dyn Backend>,
+    pub backend: Box<dyn Backend>,
     packets: VecDeque<Packet>,
 }
 
@@ -451,45 +504,76 @@ impl Drop for Link {
 
 pub fn new_local(port: &str) -> Result<Link, Error> {
     Ok(Link {
-        backend: Box::new(new_serial_backend(port)?),
+        backend: new_local_backend(port)?,
         packets: VecDeque::new(),
     })
 }
 
 pub fn new_remote(address: &str) -> Result<Link, Error> {
     Ok(Link {
-        backend: Box::new(new_tcp_backend(address)?),
+        backend: new_remote_backend(address)?,
         packets: VecDeque::new(),
     })
 }
 
-pub struct LocalDevice {
-    pub port: String,
-    pub serial_number: String,
+pub enum BackendType {
+    Serial,
+    Ftdi,
 }
 
-pub fn list_local_devices() -> Result<Vec<LocalDevice>, Error> {
+impl Display for BackendType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(match self {
+            Self::Serial => "serial",
+            Self::Ftdi => "libftdi",
+        })
+    }
+}
+
+pub struct DeviceInfo {
+    pub backend: BackendType,
+    pub port: String,
+    pub serial: String,
+}
+
+pub fn list_local_devices() -> Result<Vec<DeviceInfo>, Error> {
     const SC64_VID: u16 = 0x0403;
     const SC64_PID: u16 = 0x6014;
     const SC64_SID: &str = "SC64";
 
-    let mut serial_devices: Vec<LocalDevice> = Vec::new();
+    let mut devices: Vec<DeviceInfo> = Vec::new();
 
-    for device in serialport::available_ports()?.into_iter() {
-        if let serialport::SerialPortType::UsbPort(info) = device.port_type {
-            let serial_number = info.serial_number.unwrap_or("".to_string());
-            if info.vid == SC64_VID && info.pid == SC64_PID && serial_number.starts_with(SC64_SID) {
-                serial_devices.push(LocalDevice {
-                    port: device.port_name,
-                    serial_number,
-                });
+    if let Ok(list) = list_ftdi_devices(SC64_VID, SC64_PID) {
+        for device in list.into_iter() {
+            if device.serial.starts_with(SC64_SID) {
+                devices.push(DeviceInfo {
+                    backend: BackendType::Ftdi,
+                    port: format!("{FTDI_PREFIX}{}", device.port),
+                    serial: device.serial,
+                })
             }
         }
     }
 
-    if serial_devices.len() == 0 {
+    if let Ok(list) = serialport::available_ports() {
+        for device in list.into_iter() {
+            if let serialport::SerialPortType::UsbPort(i) = device.port_type {
+                if let Some(serial) = i.serial_number {
+                    if i.vid == SC64_VID && i.pid == SC64_PID && serial.starts_with(SC64_SID) {
+                        devices.push(DeviceInfo {
+                            backend: BackendType::Serial,
+                            port: format!("{SERIAL_PREFIX}{}", device.port_name),
+                            serial,
+                        });
+                    }
+                }
+            }
+        }
+    }
+
+    if devices.len() == 0 {
         return Err(Error::new("No SC64 devices found"));
     }
 
-    return Ok(serial_devices);
+    return Ok(devices);
 }

sw/deployer/src/sc64/mod.rs

@@ -1,6 +1,7 @@
 mod cic;
 mod error;
 pub mod firmware;
+mod ftdi;
 mod link;
 pub mod server;
 mod time;

sw/deployer/src/sc64/server.rs

@@ -1,19 +1,5 @@
-use super::{
-    error::Error,
-    link::{list_local_devices, new_serial, Command, DataType, Packet, Response, Serial},
-};
-use std::{
-    collections::VecDeque,
-    io::{BufReader, BufWriter, ErrorKind, Read, Write},
-    net::{TcpListener, TcpStream},
-    sync::{
-        atomic::{AtomicBool, Ordering},
-        mpsc::{channel, Receiver, Sender},
-        Arc,
-    },
-    thread,
-    time::{Duration, Instant},
-};
+use super::{error::Error, link::list_local_devices};
+use std::net::{TcpListener, TcpStream};
 
 pub enum ServerEvent {
     Listening(String),
@@ -55,204 +41,208 @@ pub fn run(
     Ok(())
 }
 
-enum Event {
-    Command(Command),
-    Response(Response),
-    Packet(Packet),
-    KeepAlive,
-    Closed(Option<Error>),
-}
+// enum Event {
+//     Command(Command),
+//     Response(Response),
+//     Packet(Packet),
+//     KeepAlive,
+//     Closed(Option<Error>),
+// }
 
-fn server_accept_connection(port: String, stream: &mut TcpStream) -> Result<(), Error> {
-    let (event_sender, event_receiver) = channel::<Event>();
-    let exit_flag = Arc::new(AtomicBool::new(false));
+fn server_accept_connection(_port: String, _stream: &mut TcpStream) -> Result<(), Error> {
+    // let (event_sender, event_receiver) = channel::<Event>();
+    // let exit_flag = Arc::new(AtomicBool::new(false));
 
-    let mut stream_writer = BufWriter::new(stream.try_clone()?);
-    let mut stream_reader = stream.try_clone()?;
+    // let mut stream_writer = BufWriter::new(stream.try_clone()?);
+    // let mut stream_reader = stream.try_clone()?;
 
-    let serial = Arc::new(new_serial(&port)?);
-    let serial_writer = serial.clone();
-    let serial_reader = serial.clone();
+    // let serial = Arc::new(new_local(&port)?);
+    // let serial_writer = serial.clone();
+    // let serial_reader = serial.clone();
 
-    let stream_event_sender = event_sender.clone();
-    let stream_exit_flag = exit_flag.clone();
-    let stream_thread = thread::spawn(move || {
-        let closed_sender = stream_event_sender.clone();
-        match server_stream_thread(&mut stream_reader, stream_event_sender, stream_exit_flag) {
-            Ok(()) => closed_sender.send(Event::Closed(None)),
-            Err(error) => closed_sender.send(Event::Closed(Some(error))),
-        }
-        .ok();
-    });
+    // let stream_event_sender = event_sender.clone();
+    // let stream_exit_flag = exit_flag.clone();
+    // let stream_thread = thread::spawn(move || {
+    //     let closed_sender = stream_event_sender.clone();
+    //     match server_stream_thread(&mut stream_reader, stream_event_sender, stream_exit_flag) {
+    //         Ok(()) => closed_sender.send(Event::Closed(None)),
+    //         Err(error) => closed_sender.send(Event::Closed(Some(error))),
+    //     }
+    //     .ok();
+    // });
 
-    let serial_event_sender = event_sender.clone();
-    let serial_exit_flag = exit_flag.clone();
-    let serial_thread = thread::spawn(move || {
-        let closed_sender = serial_event_sender.clone();
-        match server_serial_thread(serial_reader, serial_event_sender, serial_exit_flag) {
-            Ok(()) => closed_sender.send(Event::Closed(None)),
-            Err(error) => closed_sender.send(Event::Closed(Some(error))),
-        }
-        .ok();
-    });
+    // let serial_event_sender = event_sender.clone();
+    // let serial_exit_flag = exit_flag.clone();
+    // let serial_thread = thread::spawn(move || {
+    //     let closed_sender = serial_event_sender.clone();
+    //     match server_serial_thread(serial_reader, serial_event_sender, serial_exit_flag) {
+    //         Ok(()) => closed_sender.send(Event::Closed(None)),
+    //         Err(error) => closed_sender.send(Event::Closed(Some(error))),
+    //     }
+    //     .ok();
+    // });
 
-    let keepalive_event_sender = event_sender.clone();
-    let keepalive_exit_flag = exit_flag.clone();
-    let keepalive_thread = thread::spawn(move || {
-        server_keepalive_thread(keepalive_event_sender, keepalive_exit_flag);
-    });
+    // let keepalive_event_sender = event_sender.clone();
+    // let keepalive_exit_flag = exit_flag.clone();
+    // let keepalive_thread = thread::spawn(move || {
+    //     server_keepalive_thread(keepalive_event_sender, keepalive_exit_flag);
+    // });
 
-    let result = server_process_events(&mut stream_writer, serial_writer, event_receiver);
+    // let result = server_process_events(&mut stream_writer, serial_writer, event_receiver);
 
-    exit_flag.store(true, Ordering::Relaxed);
-    stream_thread.join().ok();
-    serial_thread.join().ok();
-    keepalive_thread.join().ok();
-
-    result
-}
-
-fn server_process_events(
-    stream_writer: &mut BufWriter<TcpStream>,
-    serial_writer: Arc<Serial>,
-    event_receiver: Receiver<Event>,
-) -> Result<(), Error> {
-    for event in event_receiver.into_iter() {
-        match event {
-            Event::Command(command) => {
-                serial_writer.send_command(&command)?;
-            }
-            Event::Response(response) => {
-                stream_writer.write_all(&u32::to_be_bytes(DataType::Response.into()))?;
-                stream_writer.write_all(&[response.id])?;
-                stream_writer.write_all(&[response.error as u8])?;
-                stream_writer.write_all(&(response.data.len() as u32).to_be_bytes())?;
-                stream_writer.write_all(&response.data)?;
-                stream_writer.flush()?;
-            }
-            Event::Packet(packet) => {
-                stream_writer.write_all(&u32::to_be_bytes(DataType::Packet.into()))?;
-                stream_writer.write_all(&[packet.id])?;
-                stream_writer.write_all(&(packet.data.len() as u32).to_be_bytes())?;
-                stream_writer.write_all(&packet.data)?;
-                stream_writer.flush()?;
-            }
-            Event::KeepAlive => {
-                stream_writer.write_all(&u32::to_be_bytes(DataType::KeepAlive.into()))?;
-                stream_writer.flush()?;
-            }
-            Event::Closed(result) => match result {
-                Some(error) => return Err(error),
-                None => {
-                    break;
-                }
-            },
-        }
-    }
+    // exit_flag.store(true, Ordering::Relaxed);
+    // stream_thread.join().ok();
+    // serial_thread.join().ok();
+    // keepalive_thread.join().ok();
 
+    // result
     Ok(())
 }
 
-fn server_stream_thread(
-    stream: &mut TcpStream,
-    event_sender: Sender<Event>,
-    exit_flag: Arc<AtomicBool>,
-) -> Result<(), Error> {
-    let mut stream_reader = BufReader::new(stream.try_clone()?);
+// fn server_process_events(
+//     stream_writer: &mut BufWriter<TcpStream>,
+//     link: &mut Link,
+//     event_receiver: Receiver<Event>,
+// ) -> Result<(), Error> {
+//     for event in event_receiver.into_iter() {
+//         match event {
+//             Event::Command(command) => {
+//                 // serial_writer.send_command(&command)?;
+//                 // serial_writer.
+//                 // link.execute_command(&command)?;
+//                 link.execute_command(&command)?;
+//             }
+//             Event::Response(response) => {
+//                 stream_writer.write_all(&u32::to_be_bytes(DataType::Response.into()))?;
+//                 stream_writer.write_all(&[response.id])?;
+//                 stream_writer.write_all(&[response.error as u8])?;
+//                 stream_writer.write_all(&(response.data.len() as u32).to_be_bytes())?;
+//                 stream_writer.write_all(&response.data)?;
+//                 stream_writer.flush()?;
+//             }
+//             Event::Packet(packet) => {
+//                 stream_writer.write_all(&u32::to_be_bytes(DataType::Packet.into()))?;
+//                 stream_writer.write_all(&[packet.id])?;
+//                 stream_writer.write_all(&(packet.data.len() as u32).to_be_bytes())?;
+//                 stream_writer.write_all(&packet.data)?;
+//                 stream_writer.flush()?;
+//             }
+//             Event::KeepAlive => {
+//                 stream_writer.write_all(&u32::to_be_bytes(DataType::KeepAlive.into()))?;
+//                 stream_writer.flush()?;
+//             }
+//             Event::Closed(result) => match result {
+//                 Some(error) => return Err(error),
+//                 None => {
+//                     break;
+//                 }
+//             },
+//         }
+//     }
 
-    let mut header = [0u8; 4];
-    let header_length = header.len();
+//     Ok(())
+// }
 
-    loop {
-        let mut header_position = 0;
+// fn server_stream_thread(
+//     stream: &mut TcpStream,
+//     event_sender: Sender<Event>,
+//     exit_flag: Arc<AtomicBool>,
+// ) -> Result<(), Error> {
+//     let mut stream_reader = BufReader::new(stream.try_clone()?);
 
-        let timeout = stream.read_timeout()?;
-        stream.set_read_timeout(Some(Duration::from_millis(10)))?;
-        while header_position < header_length {
-            if exit_flag.load(Ordering::Relaxed) {
-                return Ok(());
-            }
-            match stream_reader.read(&mut header[header_position..header_length]) {
-                Ok(0) => return Ok(()),
-                Ok(bytes) => header_position += bytes,
-                Err(error) => match error.kind() {
-                    ErrorKind::Interrupted | ErrorKind::TimedOut | ErrorKind::WouldBlock => {}
-                    _ => return Err(error.into()),
-                },
-            }
-        }
-        stream.set_read_timeout(timeout)?;
+//     let mut header = [0u8; 4];
+//     let header_length = header.len();
 
-        let data_type: DataType = u32::from_be_bytes(header).try_into()?;
-        if !matches!(data_type, DataType::Command) {
-            return Err(Error::new("Received data type was not a command data type"));
-        }
+//     loop {
+//         let mut header_position = 0;
 
-        let mut buffer = [0u8; 4];
-        let mut id_buffer = [0u8; 1];
-        let mut args = [0u32; 2];
+//         let timeout = stream.read_timeout()?;
+//         stream.set_read_timeout(Some(Duration::from_millis(10)))?;
+//         while header_position < header_length {
+//             if exit_flag.load(Ordering::Relaxed) {
+//                 return Ok(());
+//             }
+//             match stream_reader.read(&mut header[header_position..header_length]) {
+//                 Ok(0) => return Ok(()),
+//                 Ok(bytes) => header_position += bytes,
+//                 Err(error) => match error.kind() {
+//                     ErrorKind::Interrupted | ErrorKind::TimedOut | ErrorKind::WouldBlock => {}
+//                     _ => return Err(error.into()),
+//                 },
+//             }
+//         }
+//         stream.set_read_timeout(timeout)?;
 
-        stream_reader.read_exact(&mut id_buffer)?;
-        let id = id_buffer[0];
+//         let data_type: DataType = u32::from_be_bytes(header).try_into()?;
+//         if !matches!(data_type, DataType::Command) {
+//             return Err(Error::new("Received data type was not a command data type"));
+//         }
 
-        stream_reader.read_exact(&mut buffer)?;
-        args[0] = u32::from_be_bytes(buffer);
-        stream_reader.read_exact(&mut buffer)?;
-        args[1] = u32::from_be_bytes(buffer);
+//         let mut buffer = [0u8; 4];
+//         let mut id_buffer = [0u8; 1];
+//         let mut args = [0u32; 2];
 
-        stream_reader.read_exact(&mut buffer)?;
-        let command_data_length = u32::from_be_bytes(buffer) as usize;
-        let mut data = vec![0u8; command_data_length];
-        stream_reader.read_exact(&mut data)?;
+//         stream_reader.read_exact(&mut id_buffer)?;
+//         let id = id_buffer[0];
 
-        if event_sender
-            .send(Event::Command(Command { id, args, data }))
-            .is_err()
-        {
-            break;
-        }
-    }
+//         stream_reader.read_exact(&mut buffer)?;
+//         args[0] = u32::from_be_bytes(buffer);
+//         stream_reader.read_exact(&mut buffer)?;
+//         args[1] = u32::from_be_bytes(buffer);
 
-    Ok(())
-}
+//         stream_reader.read_exact(&mut buffer)?;
+//         let command_data_length = u32::from_be_bytes(buffer) as usize;
+//         let mut data = vec![0u8; command_data_length];
+//         stream_reader.read_exact(&mut data)?;
 
-fn server_serial_thread(
-    serial_reader: Arc<Serial>,
-    event_sender: Sender<Event>,
-    exit_flag: Arc<AtomicBool>,
-) -> Result<(), Error> {
-    let mut packets: VecDeque<Packet> = VecDeque::new();
+//         if event_sender
+//             .send(Event::Command(Command { id, args, data }))
+//             .is_err()
+//         {
+//             break;
+//         }
+//     }
 
-    while !exit_flag.load(Ordering::Relaxed) {
-        let response = serial_reader.process_incoming_data(DataType::Packet, &mut packets)?;
+//     Ok(())
+// }
 
-        if let Some(response) = response {
-            if event_sender.send(Event::Response(response)).is_err() {
-                break;
-            }
-        }
+// fn server_serial_thread(
+//     link: &mut Link,
+//     event_sender: Sender<Event>,
+//     exit_flag: Arc<AtomicBool>,
+// ) -> Result<(), Error> {
+//     let mut packets: VecDeque<Packet> = VecDeque::new();
 
-        if let Some(packet) = packets.pop_front() {
-            if event_sender.send(Event::Packet(packet)).is_err() {
-                break;
-            }
-        }
-    }
+//     while !exit_flag.load(Ordering::Relaxed) {
+//         let response = link.backend.process_incoming_data(DataType::Packet, &mut packets)?;
 
-    Ok(())
-}
+//         if let Some(response) = response {
+//             if event_sender.send(Event::Response(response)).is_err() {
+//                 break;
+//             }
+//         }
 
-fn server_keepalive_thread(event_sender: Sender<Event>, exit_flag: Arc<AtomicBool>) {
-    let mut keepalive = Instant::now();
+//         if let Some(packet) = packets.pop_front() {
+//             if event_sender.send(Event::Packet(packet)).is_err() {
+//                 break;
+//             }
+//         }
+//     }
 
-    while !exit_flag.load(Ordering::Relaxed) {
-        if keepalive.elapsed() >= Duration::from_secs(5) {
-            keepalive = Instant::now();
-            if event_sender.send(Event::KeepAlive).is_err() {
-                break;
-            }
-        } else {
-            thread::sleep(Duration::from_millis(10));
-        }
-    }
-}
+//     Ok(())
+// }
+
+// fn server_keepalive_thread(event_sender: Sender<Event>, exit_flag: Arc<AtomicBool>) {
+//     let mut keepalive = Instant::now();
+
+//     while !exit_flag.load(Ordering::Relaxed) {
+//         if keepalive.elapsed() >= Duration::from_secs(5) {
+//             keepalive = Instant::now();
+//             if event_sender.send(Event::KeepAlive).is_err() {
+//                 break;
+//             }
+//         } else {
+//             thread::sleep(Duration::from_millis(100));
+//         }
+//     }
+// }