Question about the readout order of many-to-one FX3 threads

[lance2021]

In the note AN75779, this passage caught my attention:

" The USB socket (acting as a consumer socket) uses a different DMA descriptor chain (descriptor chain 3) to read the data out in the correct order..."

Please see the full description in the attached picture.

I have a question, how does DMA descriptor chain 3 determine the order? Are programmers required to design?

Thank you very much for your answer.

[JayakrishnaT_76 · Accepted solution]

Hello,

This is configured using the 3rd parameter of the API CyU3PDmaMultiChannelSetXfer (). Please refer to FX3 API guide to understand more on this.