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USB Superspeed Peripherals

vico_292776
New Contributor

Hi,

   

In my application I have a FPGA connected to the GPIF port of the FX3 device. I want to have an uninterrupted data flow between the FPGA and FX3 (data to send to the host) and I understood that I need to use two GPIF sockets  to switch between buffers without latency.

   

 I want :

   

- use the FIFO write configuration to have the possibility to switch sockets with the A0-A1 address lines,

   

- use the DMA AUTO mode to maximize throughput ,

   

- only one IN end point.

   

 

   

 So, my questions are :

   

- first of all, is that the right way ?

   

- and, can I use only one channel of the DMA mechanism (and this is it that changes automatically between socket) or I have to use the DMA multi-channel mechanism to transfer data from the two GPIF sockets to my IN end point ?

   

 Thanks,

   

Vianney

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Anonymous
Not applicable

Hi Vianney,

   

Your understanding is right.

   

You need to use DMA multi channel (MANY_TO_ONE) in your application.

   

Please let me know if you have any more questions.

   

Thanks,

   

sai krishna.

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vico_292776
New Contributor

Ok, thank you.

   

I will try to do that.

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