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Altera_Forum
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10 years ago

PCIe with DMA interface locks RD_DMA_LAST_PTR reaches 127 (7F)

Hi, I have PCIe Hard IP with internal DMA interface (14.0 compiled). I wrote a PC window 7 device driver. When RD_DMA_LAST_PTR reaches 0x7Fsoftare writes 0x7F and the last descriptor ID to the PTR...
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Altera_Forum
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10 years ago

Hi Skbeh,

I have Cyclone V only. I have work around with this issue with driver to 128 a time. DMA is fast, it doesn't have any performance hit.

Thank you,