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Problem about DM9000A and NicheStack....

Altera_Forum
Honored Contributor II
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Hi, 

Can you help me, 

1. 

When I'm using NicheStack(DM9000A as NIC),I met some strange problems: 

when i'm debugging TCP prot,the program entered ip_output() function.It triggered a panic(),and told me this message:  

ip_output: overflow 

The program crashed after this message... 

How to avoid this ? 

2. 

The bit[0] of DM9000A's TX Control Register (TCR) sometimes don't clear itself after sending completely. I wrote: 

while(ior(TCR)&0x01) 

udelay(5); 

and the program stuck here.... 

What should I do? 

 

Thank you
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