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CMSIS library Network Bug

Parisa Mohamadi

Hi,
Here is my code that Send and transmit data between PC and my PHY to MCU simultaneously.(Stm32f10x)

www.4shared.com/.../1_online.html
user:parisa.mohamadi227@gmail.com
pwd:stm32forum

However After 4 hours without any changes(Functions and size of packet are the same for 4 hours) it disconnects my connection. I've checked TCP/IP Packet and Found out that it lost TCP window Size. I checked different parts of my code but I can't see any error and anything that maybe can allow to full window size ( you can see that in each receiving I clear window size)

obrazki.elektroda.pl/7212488200_1494096051.png
obrazki.elektroda.pl/5960091300_1494096051.png

it is not related to CMSIS library that has a little problem?

Thanks