Hello,

while adapting and testing our software with the 'AM1808 eXperimenter Kit', we experience some problems with Ethernet-reception, which we do not understand. Could you please take a look to the details below.

Thank you very much!
Ralf

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PROBLEM-BRIEF
---------------
The BSL-EMAC-LowLevel Driver 'evmam1808_emac.c' (taken from BSL V1.0) delivers
about 80% invalid frames.

PROBLEM-DETAILS
------------------
To be compatible to our customers firmware, we use the Logic Board Support Library
BSL V1.0. In order to integrate our software, we adapt our ethernet module
to the unchanged BSL module 'evmam1808_emac.c', which really has a well-arranged
API. As far as we can see now, the integration works, LINK detection, reception
and transmission works so far.

BUT: While testing our software, we see about 80% corrupt frames delivered
by the BSL function 'EMAC_rxPacket()'. A closer look into the delivered frame
content shows, that it contains old - formerly received - data. It looks like
the RX descriptor handling is corrupted.

Please note, that we exclusive use the API functions of 'evmam1808_emac.c', in
which 'EMAC_init()', 'EMAC_rxPacket()' and 'EMAC_txPacket()' completely handle
the EMAC Rx/Tx descriptors inside.

QUESTIONS
-----------
Before stepping through the BSL LowLevel driver source, we would like to ask some
questions:
1) Is there any known issue concerning this behavior?
2) Is there an update available for 'evmam1808_emac.c' (2010/01/21, BSL V1.0)?
3) Is there an demonstration project available, which uses 'evmam1808_emac.c'?
4) Do you have any hint, where to start investigating the problem?

ENVIRONMENT
-------------
- WinXP Home,
- IAR Workbench V5.4, ARM Compiler
- IAR J-Link Debugger
- LOGIC Evalboard TMDXEXP1808L
- LOGIC BoardSupportLibrary 'AM1808 BSL-1.0-Setup.zip'

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