ready_valid_bfm.md

Ready/Valid BFM

The Ready/Valid BFM is a collection of ROHD-VF components and objects that are helpful for validating hardware that contains interfaces that use a ready/valid protocol. To summarize:

• When a transmitter has something to send, it raises valid.
• When a receiver is able to accept something, it raises ready.
• When both valid and ready are high, the transaction is accepted by both sides.

The main two components are the ReadyValidTransmitterAgent and ReadyValidReceiverAgent, which transmit and receive data, respectively. Any bundle of information can be mapped onto the data bus. Both agents provide a blockRate argument which controls a random weighted chance of preventing a transaction from occuring (either delaying a valid or dropping a ready).

Additionally, the ReadyValidMonitor can be placed on any ready/valid protocol to observe transactions that are accepted. The resulting ReadyValidPackets can also be logged via the ReadyValidTracker.

The unit tests in ready_valid_bfm_test.dart, which have a transmitter and receiver agent talking to each other, can serve as a good example of how to use these components.