The following figure illustrates the example design that is generated when the Hard FEC Wrapper option is selected in the CPRI GUI.
Figure 1. Example Design showing CPRI
Hard FEC Wrapper
The CPRI Hard FEC Wrapper example design includes logic for Reed-Solomon encoded, PN-5280 scrambled data generation and monitoring.
- fec_data_gen.vhd
- Data generator. This block outputs 64b66b encoded data to the receive interface.
- fec_data_upd.vhd
- This block provides functionality to generate the data fed by fec_data_gen to the CPRI Hard FEC wrapper.
- fec_data_chk.vhd
- Data monitor. This block checks the received 64b66b data. Error indication is provided by a locked flag.
- <component_name>_fc32_rs_fec.v
- A Reed-Solomon Forward Error Correction (RS-FEC) block, used to encode and scramble the data forwarded to the CPRI core.