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Altera_Forum's avatar
Altera_Forum
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21 years ago

Ethernet and DMA

Hi everyone, I'm working with a LwIP Stack (only using UDP) and make some timing measurements to find the nottlenecks of the stack. So I saw that the data transfer to the SMSC chip needs...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

okay, I was my fault http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif

I wrote the number of word transfers into the length register instead of the length in bytes. In my case 10.

Because of the word transfers the DMA counts 10, 6, 2, -2 . . . So the length will never reach the value zero which would stop the

DMA.