PipeOut with FWFT FIFO skipping 4 bytes and repeating the last 4 bytes

FrontPanel
1

When using a FWFT FIFO in front of a PipeOut, it skips the first 4 bytes, and repeates the last 4.
So when I send this:
[0 1 2 3 4 5 6 7]
I receive this:
[2 3 4 5 6 7 6 7]

With a standard FIFO it all seems to work perfectly fine.
Using the latest FrontPanel, and a XEM7305 board, driving the board from Python.

okEH seems to transmit the right bits, (same as I’ve seen when I write to the device), are there any settings in the okHost I need to play with to make this work?

2

Please post a timing diagram (i.e. Vivado logic debug core) showing all of the pipe signals? This is likely just an error in your timing.

3

I’ve moved the design onwords with the standard FIFO, so I don’t have those timing diagrams anymore.