Add option for having the last signal

drom / reqack

🔁 elastic circuit toolchain

https://observablehq.com/collection/@drom/reqack

MIT License

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Add option for having the last signal #54

Open ameetgohil opened 5 years ago

drom commented 5 years ago

What is "the last signal"?

ameetgohil commented 5 years ago

similar to the last signal in axi-stream transactions that triggers the end of stream. I have been just concatenating the signal with data but it's really cumbersome.

drom commented 5 years ago

How about "credit-based" mechanism. A counter at the receiving end that:

indicates the number of transactions in flight.
incremented by a transmitter (+1 or +N) with the expected number of resulted data words.
decremented by every arrived data word (-1)

We can build this mechanism aside of major datapath or controller by just monitoring req/ack signals. It should work fine for simple cases when the number of results doesn't depend on data itself. Will that work for your case?