Implement almost_full and almost_empty for Synchronous FIFOs

m-labs / migen

A Python toolbox for building complex digital hardware

https://m-labs.hk/migen

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Open occheung opened 1 month ago

occheung commented 1 month ago

This PR introduces FIFO watermark configuration.

When the FIFO level reaches the high watermark (inclusive), almost_full is asserted.
When the FIFO level does not exceed the low watermark (inclusive), almost_empty is asserted.