[lwip-users] Re: [lwip] SLIP support in Windows

[James Roth]

Fabio Fumi wrote:

>My problem is that even before the first AT command, a
>string of some repeated characters (something like
>'±±±±±±±ááááááá...') is sent to the modem, as a
>start-up handshake procedure, I guess. If the modem
>dosen't answer to that, the connection is stopped with
>a message like 'modem not responding'. What should be
>the answer to that string? A simple \r is enough? Did
>you have such a problem? Thanks.
> bye
>  Fabio
>
I don't reply to such a string.  What is your windows setup?  Mine:

    33.6 modem, com port at 115200 baud, no flow control
    SLIP with 1500 MTU
    no authentication

>
> --- James Roth <address@hidden> ha scritto: >
>
>>    I just humor windows with an OK\r reply to most
>>commands.  Windows 
>>sends the AT... command followed by a \r.  The ATDT
>>command or the 
>>CLIENT string (with no \r) cause me to go into SLIP
>>mode.  I also put 
>>delays in the AT code for realism.
>>
>>while (1)
>>{
>>    if (got ATDT...)
>>    {
>>        write ("CONNECT\r")
>>        break;
>>    }
>>    else if (got AT...) /* an AT other than ATDT */
>>    {
>>        write ("OK\r")
>>    }   
>>    else if (got CLIENT)
>>    {
>>        write ("CLIENTSERVER")
>>        break;
>>    }
>>}
>>
>>do_slip()
>>
>>Good luck!
>>

-- 
James Roth
Shugyo Design Technologies
http://www.shugyodesign.com/



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