c6678 linux sdk filetest demo edma error

Sung Hyeuk Hong

Hello,

I am trying to develop a system involving TI C6678 multicore processor connected to linux PC via PCIe. I came across an example called 'filetest demo' provided in desktop linux sdk. However, system freezes when I try to do DMA from DSP -> linux PC. When system freezes, nothing works and we need to reboot the system.

I found out that reading file in linux PC and transfer to DSP / writing file in linux PC that gets data from DSP uses same function which is do_dsp_dma. It is pretty strange when DMA to DSP works fine but DMA from DSP to linux PC, the PC freezes. When I disable DMA from DSP to linux PC, linux PC does not freeze.

I have been trying to debug this phenomenon over a week now however I got no clue at all.

Anybody has a clue or a solution to the problem I have?

Yours Truly,

Peter

over 9 years ago

0 Raja over 9 years ago

TI__Guru* 81335 points

Welcome to the TI E2E forum. I hope you will find many good answers here and in the TI.com documents and in the TI Wiki Pages (for processor issues). Be sure to search those for helpful information and to browse for the questions others may have asked on similar topics (e2e.ti.com). Please read all the links below my signature.

We will get back to you on the above query shortly. Thank you for your patience.

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