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* fpga: lib: add handshake to replace FIFO for ctrlport CDCMax Köhler2020-08-131-0/+82
The clock crossing of the ctrlport used FIFOs to transfer requests and responses between clock domains. This commit adds a handshake based on the pulse synchronizer to reduce the resource usage for ctrlport clock domain crossing. Data is stored in a single register while the pulse synchronizer handles the signaling of valid flags.