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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

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Hello Hey Hey,

Thank you for your response, that was very informative and cleared up a lot.

I have atleast one more point of confusion. There are two Chaining DMA Descriptor Headers at offset 0x00 and 0x10. The first for write and the other for read. Why is there a Direction bit in the Control Fields (Table 7-4 of PCI Express Compilers Users Guide 8.0)? Is this a redudant thing, or is there some significance to this bit. To me, I would assume the registers at 0x00 and 0x10 specify the direction.

Thanks.

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I am little confused about above post. It says descriptor headers is at offset 0x00 and 0x10 where as Table 4-9 in compiler guide show that 0x00 holds device/vendor ID. Any help to clarify is appreciated