[Boost-users] [asio] serial_port::async_read_some() with native COM ports on WIN32

Subject: [Boost-users] [asio] serial_port::async_read_some() with native COM ports on WIN32
From: Running Razor (runningrazor_at_[hidden])
Date: 2011-09-11 21:14:20

I use serial_port::async_read_some() to read data from serial interface 
on windows. Using virtual com ports (FTDI, SiLabs) everything wents as 
expected.

But on native COM ports the completion handler is not called until the 
buffer (passed to async_read_some) is completely filled.

I use "plain" communication without hardware handshake:

...

typedef serial_port_base  ser;

mDevice.set_option( ser::baud_rate     ( baud ) );

mDevice.set_option( ser::flow_control  ( ser::flow_control::none ) );

mDevice.set_option( ser::parity        ( ser::parity::none ) );

mDevice.set_option( ser::stop_bits     ( ser::stop_bits::one ) );

mDevice.set_option( ser::character_size( 8 ) );

...

Do I miss something or is this a bug?

tested on boost_1_38_0 and boost_1_46_1