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Altera_Forum
Honored Contributor
Honored ContributorWith the Cyclone V SoC, how can I use the FPGA fabric to access the HPS DMA?
Hello everyone,
I want to make something that records values that are in my FPGA. I thought of using the Cyclone V SoC DMA, I do have the Altera SoC kit. With the Cyclone V SoC, how can I use the FPGA fabric to access the HPS DMA? I want to set a trigger in the HPS DMA, so that when I send a signal to high level at FPGA Fabric, the DMA starts to copy a FPGA FABRIC RAM content to the DDR connected in the HPS and visible by the Linux running in the ARM. *Is this the easiest/fastest way of achieving what I want?22 Replies
Altera_ForumThere are up to 6 FPGA-to-SDRAM ports that you can push that data directly into the HPS SDRAM controller from the FPGA. If it was me I would just use those to push the data in directly and interrupt the processor after the data has been written to memory. Alternatively you could push the data through the F2H bridge into the ACP mapper so that the processor has a cache coherent view of the data automatically (depends on how much data you are sending over).
- Altera_Forum
HPS and FPGA connected through AMBA bus.
If HPS-DMA registers visible from FPGA, 2nd may signal to 1st. *And why you do not write data to HPS memory from FPGA direct in process accumulation as possible ?
