This very fine website describe a complete RDS coder using a PIC
16F876. You will find diagrams, boards and binary codes to achieve
an encoder RDS, the assembly being informed well.
RDS Decodeur
On this very good site, you will find the achievement of a decoder
RDS, but also many data on buses USB for example.
A very interristing site to be consulted for the achievements and
the documentations on the electronics.
This site describes the achievement of a decoder RDS,
developed during a project BTS.