AM3358: How to use the GPMC of the AM335x CPU uses DMA to read and write the FIFO of the FPGA

linli

Part Number: AM3358

Tool/software:

There is a reference article found on E2E, but it is not clear enough and there is no implementation. Is there a similar implementation method for reference? Reference post below:

e2echina.ti.com/.../am335x-cpu-gpmc-dma-fpga-fifo

By the way, I can't remember which version of the SDK we're using. The kernel version is 4.1.6.

9 months ago

0 Bin Liu 9 months ago

TI__Guru**** 167181 points

Hi,

The DMA driver is implemented under kernel DMAEngine framework. Other kernel drivers use DMAEngine API to request and use DMA channels to move data. Kernel Documentation explains how to use DMAEngine API. You can also refer to other kernel drivers to understand how to use DMAEngine API.

linli said:
Reference post below:

e2echina.ti.com/.../am335x-cpu-gpmc-dma-fpga-fifo

I glanced this e2e post, it seems to be a proper solution.

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AM3358: How to use the GPMC of the AM335x CPU uses DMA to read and write the FIFO of the FPGA