async_comm::Comm Class Reference

Abstract base class for an asynchronous communication port. More...

#include <comm.h>

Inheritance diagram for async_comm::Comm:

Public Member Functions
	Comm (MessageHandler &message_handler=default_message_handler_)
	Set up asynchronous communication base class. More...
bool	init ()
	Initializes and opens the port. More...
void	close ()
	Closes the port.
void	send_bytes (const uint8_t *src, size_t len)
	Send bytes from a buffer over the port. More...
void	send_byte (uint8_t data)
	Send a single byte over the port. More...
void	register_receive_callback (std::function< void(const uint8_t *, size_t)> fun)
	Register a callback function for when bytes are received on the port. More...
void	register_listener (CommListener &listener)
	Register a listener for when bytes are received on the port. More...

Protected Member Functions
virtual bool	is_open ()=0
virtual bool	do_init ()=0
virtual void	do_close ()=0
virtual void	do_async_read (const boost::asio::mutable_buffers_1 &buffer, boost::function< void(const boost::system::error_code &, size_t)> handler)=0
virtual void	do_async_write (const boost::asio::const_buffers_1 &buffer, boost::function< void(const boost::system::error_code &, size_t)> handler)=0

Protected Attributes
MessageHandler &	message_handler_
boost::asio::io_service	io_service_

Static Protected Attributes
static constexpr size_t	READ_BUFFER_SIZE = 1024
static constexpr size_t	WRITE_BUFFER_SIZE = 1024
static DefaultMessageHandler	default_message_handler_

Detailed Description

Abstract base class for an asynchronous communication port.

Definition at line 81 of file comm.h.

Constructor & Destructor Documentation

Comm()

async_comm::Comm::Comm

(

MessageHandler &

message_handler = default_message_handler_

)

Set up asynchronous communication base class.

Parameters

message_handler

Custom message handler, or omit for default handler

Definition at line 48 of file comm.cpp.

Member Function Documentation

init()

bool async_comm::Comm::init

(

)

Initializes and opens the port.

Returns

True if the port was succesfully initialized

Definition at line 61 of file comm.cpp.

register_listener()

void async_comm::Comm::register_listener

(

CommListener &

listener

)

Register a listener for when bytes are received on the port.

The listener must inherit from CommListener and implement the receive_callback function. This is another mechanism for receiving data from the Comm interface without needing to create function pointers. Multiple listeners can be added and all will get the callback

Parameters

listener

Reference to listener

Definition at line 115 of file comm.cpp.

register_receive_callback()

void async_comm::Comm::register_receive_callback

(

std::function< void(const uint8_t *, size_t)>

fun

)

Register a callback function for when bytes are received on the port.

The callback function needs to accept two parameters. The first is of type const uint8_t*, and is a constant pointer to the data buffer. The second is of type size_t, and specifies the number of bytes available in the buffer.

Warning

The data buffer passed to the callback function will be invalid after the callback function exits. If you want to store the data for later processing, you must copy the data to a new buffer rather than storing the pointer to the buffer.

Parameters

fun	Function to call when bytes are received

Definition at line 110 of file comm.cpp.

send_byte()

void async_comm::Comm::send_byte ( uint8_t  data )

inline

Send a single byte over the port.

Parameters

data	Byte to send

Definition at line 113 of file comm.h.

send_bytes()

void async_comm::Comm::send_bytes	(	const uint8_t *	src,
		size_t	len
	)

Send bytes from a buffer over the port.

Parameters

src	Address of the buffer
len	Number of bytes to send

Definition at line 97 of file comm.cpp.

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The documentation for this class was generated from the following files:

• include/async_comm/comm.h
• src/comm.cpp