I have got a module with an AXI4-Stream interface. I want this module to extract an ethernet frame from the incoming TDATA signal in order to change some of its fields and send it forward to the output.
The issue is that the frame is bigger than the TDATA signal (512 bits vs 64 bits), so if, for instance, I were to parse the source MAC address field (which is 48-bits wide), it would be sent over two different TDATA chunks. This, at least with my experience in design, makes the parsing logic more difficult. Because of this, I was wondering what could be the most efficient/correct way to do it retrieve data from TDATA. I was thinking in storing the 64-bit chunks within a 512-bit word FIFO queue and parse such word more easily, but as I am not very experience in digital design, I'm not sure if this could be troublesome in any way.
I have tried to look information on the topic but I could not find any, so I would appreciate if anyone could help me by indicating if my FIFO idea makes sense at all or what would be the correct way to do it.
