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Visitor hkasai
Visitor
118 Views
Registered: ‎07-11-2019

Unfunctional DMA transfer @ Zynq-7000 (Z-turn Board)

Hello,

I am trying to do a DMA transfer from DDR3-SDRAM to PL on a Z-turn board, but it doesn't work as expected. Please advise.

・The source address specified for DMA transfer is ".bss Section" in DDR, but it cannot be transferred even if it is changed to ".data section".
 (Try setting the source address to ".txt section in DDR" and the transfer works as expected.)
・Unexpected behavior means that data at the address specified by the master cannot be read.
 (Unknown data or 0x00000000 is read.)
・The operation is the same whether AXI-DMA-IP or AXI-CDMA-IP is used.
・The connection between PL and PS uses the AXI-HP port.

Is there any possible cause?


Regards.

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Visitor hkasai
Visitor
35 Views
Registered: ‎07-11-2019

Re: Unfunctional DMA transfer @ Zynq-7000 (Z-turn Board)

I tried S_AXI_GP1 without using the HP port and the result was the same.

If the CDMA-IP on the PL side is the master, is there access restriction by DDR area?

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