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TM4C129ENCPDT: EMAC stops responding

Part Number: TM4C129ENCPDT

Hi,

I am using enet_lwip example to test ethernet peripheral  (examples\boards\dk-tm4c129x\enet_lwip). After a while it stops responding, debugging shows in tiva-tm4c129.c file, function tivaif_interrupt() 

if(ui32Status & EMAC_INT_ABNORMAL_INT)

{
g_ui32AbnormalInts++;
}

this variable increments and never gets out of this situation. Please let me know what changes to be done to come out of the ABNORMAL state.

Best Regards,

Dileep