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Altera_Forum
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10 years ago

Altera SGDMA & TSE

Hi all, I am working on TSE and is using sgdma for avalon_stream_to_mem descriptor, now in my code I have four descriptors,I am receiving network packets in my local buffer from sgdma in every sgd...
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Altera_Forum
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10 years ago

No at the moment I am not concatenating ethernet frames before sending them to usb. I tried once but I found that I have to wait for frames to come then I concatenate and also I have to wrap all the frames with USB header and trailer and attach all the information like length of each frame, number of frames attached etc. I am using NCM class for doing this so I have to follow NCM fixed format for sending data. And so these all takes longer and results in increased delay if i ping from remote pc. And also I am not using DMA because each frame sizes are almost 60,90 and maximum 1514 bytes. Do you really think that concatenating number of frames will increase in speed?