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Altera_Forum's avatar
Altera_Forum
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17 years ago

How Can I set up DMA operation with my own PC software application?

Hi All: I want to re-use the pcie_highperformancedesign example provided by the Arria GX Development Kit. Now I am confused with the PC software application altpcie_demo.exe. :confused: I a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

:(

We tried to make a software application to manage dma transfer using AN456.

We configure the descriptor table correctly and start the dma transfer.

All data transfered are OK with the right number of descriptor packets.

But it seems that the EPLAST is never updated by the dma and we are not capable to check the end of transfer.

we tryed to set all EPLAST_ENA bit in decscriptor header and in dma descriptor header register but nothing changed.

We tryed to set register and run one transfer done by altpcie_demo.exe reported in pcie_log.txt : the transfer and data are ok but when we read the EPLAST location (stored at offeset 3 (DWORD format) in our descriptor table) nothing change.

Please help us we are near sucide ...