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Altera_Forum's avatar
Altera_Forum
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12 years ago

Stream to Memory sgdma problem

I am having two problems with the sg-dma in my system. My first issue is that the sg-dma ready signal goes low after the first element of streaming data, then returns high on the third. This causes...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Hello Guys, I have a problem with SGDMA which occurred recently. I am using SGDMA Module for almost 4 years (Thanks to BadOmen)and so far it worked very well without any problems. recently, we have an application which requires higher data transfer and I used ST-MM SGDMA to write data from ADCs to SDRAM. I did a test for 25 GB of data and it is all ok except 16KB of data. looks like in that particular 16KB, 4th byte is always written zero and after that 16KB it is all ok. this only happens once during that 25GB of data. I have 3 different SGDMAs and the other 2 are ok. the Transfer size is programmed to (16777216 Bytes) and I am transferring the amount of 5191560 Bytes each time. I ma using Packet support and ready latency of 1. I know this problem is looks vague but any idea and comment on that greatly apprecited. Many thanks,

Aidin.