Re: [boost] How to access COM ports

Subject: Re: [boost] How to access COM ports
From: master master (master_4_master_at_[hidden])
Date: 2009-01-04 20:57:40

Thank you,

Now my example is half done. I can open the COM port and write on it. But still I am tweaking with the response of COM port. 

When I write to COM port data goes to attached device that works perfectly but then device returns the response. Response comes in the same stream, so I am reading the response from the same stream. The problem is that the response comes sometimes after 3 seconds, some times it comes after 5 seconds. If I read immediately then it reads the same data I send to COM port. Then I used threading and I force my program to sleep 3 or 5 seconds till the response comes and then read the data. Now it reads response correctly. But it does not read correctly every time. Now I am going to try two options  1. Do finer coding  2. Change the device.

Can anyone tell me how to add example in boost docs example. Because there are very few examples for asio; specially on serial port.
When my example will be complete I want to add it to BOOST documentation.

And yes! my portability issue is also solved. I do not need to use winsock or socket.h etc. Because Boost is itself portable, if I use Boost's library for networking then it will be automatically portable. Only we need to find out which library can serve our purpose.

Rahul
Boostian

 
 
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________________________________
From: Giovanni Piero Deretta <gpderetta_at_[hidden]>
To: boost_at_[hidden]
Sent: Sunday, 4 January, 2009 9:21:40 PM
Subject: Re: [boost] How to access COM ports

On Sun, Jan 4, 2009 at 4:48 PM, Philippe Vaucher
<philippe.vaucher_at_[hidden]> wrote:
>> How to access COM port using BOOST library. I want to access COM3 port
>> using boost.
>>
>> I tried this
>> boost::asio::ip::tcp::resolver::query query("localhost", "COM3");
>
>
> COM ports aren't sockets. There's nothing in boost to support COM/serial
> ports yet.

Actually, yes. Boost.Asio does support serial ports:

http://www.boost.org/doc/libs/1_37_0/doc/html/boost_asio/overview/serial_ports.html

But I've never used this feature, so I can't really help.

-- 
gpd
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