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Re: [lwip-users] Weird PPP behavior
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From: |
Sergio R. Caprile |
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Subject: |
Re: [lwip-users] Weird PPP behavior |
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Date: |
Mon, 29 Feb 2016 13:48:47 -0300 |
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User-agent: |
Mozilla/5.0 (Windows NT 5.1; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
Looks like we've got someone else to blame...
So you have a modem vía USB... you don't have PPP over serial, you have
PPP over something over USB.
What is it, VCP ? with host drivers written by... (you ?) that you know
works OK because... (?) And, btw, the USB hardware is OK ? (USB
transfers are CRC "protected" but...)
I guess you should see why there are two packets when there is a bad
fcs. It is the only moment when it happens. Looks like "someone" got
interrupted and didn't finish a transfer, lost state, and then resumed
with some missing bytes in the middle, causing an fcs failure.
Check your USB statistics, maybe transfer errors are firing something
unexpected.