Message: 1
Date: Mon, 29 Mar 2010 14:20:39 +0200
From: Nicolas Dioli <[email protected]>
Subject: Re: [lwip-users] lwIP + PPP
To: Mailing list for lwIP users <[email protected]>
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hello, i am using lwip 1.3.2 + PPP with FreeRTOS.
I have a question about pppInProc.
When i receive a ppp packet which start by 0x7E, when the function is
testing the fcs: he found an invalid fcs and drop the packet.
I don't understand why ( i have already read rfc but i'm lost).
perhaps, the packet is wrong: my sio_read return only the packet between
2 flags 0x7E. An didn't return "CONNECT 115200" from the modem GPRS.
Hmm, sio_read should not filter the input from the device. I'm using a
GPRS modem too
and I don't have such problems. As a side note - I used to get bad fcs
in the past and the problem turned out to be
incorrect UART port settings which resulted in big bit error rates for
that baud rate.
Please make sure that every single character from the modem is delivered
by sio_read() and tell us
if this helps.
Btw, Simon, this may be the same problem as yours.
Iordan.
Nicolas Dioli
Polytech'Nice-Sophia student
_______________________________________________
lwip-users mailing list
[email protected]
http://lists.nongnu.org/mailman/listinfo/lwip-users
