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TCP/IP connection seems "deaf" (no receive interrupt)

Hi,

We are using the Luminary LM3S3760 ARM Cortex3 processor.
The evaluation board uses the LM3S6965 chip (superset). On the evaluationboard ethernet connection works fine. The same sw however running on our own board with the 3760, the receiving side seems "deaf". No interrupt is generated when receiving data. Signals (analogue) are measured and match the signals measured on the evaluationboard.

We use the standard Keil RT library functionality (RL-TCPnet) for realizing ethernet communication.

Anyone a clue ?

Thnx

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