PS DMA support

Hi folks,

The mmio module can do transfers from PS memory to PL memory mapped devices, sending a numpy buffer type to memory. This write (write_mm) loops over the buffer and writes the data 32-bit at a time. In my application, I’d like to use PS DMA to move the data (LPD or FPD DMA) for a faster transfer. Do you have any pointers how to implement this in PYNQ? Is there any implementation like this that you know of?

Thanks in advance,

There isn’t direct support in PYNQ for the PS DMA.
You may find this post on the Zynq US+ PS DMA useful.

In PYNQ we provide support for DMAs in the programmable logic. In general you should get better performance with a dedicated PL DMA.

See here for info:

1 Like