Morse code encoder and decoder in VHDL

We need a project done in Morse code encoder and decoder in VHDL. Our project contains 2 parts a transmitter and receiver. The transmitter part receives the text(ASCII) from the PC(user) via UART receiver and transmits the text to morse code encoder(converts text to morse code). The morse code pattern then is sent to an led. Dot(.) corresponds to LED on and dash(-) LED off. The receiver part has a photo diode which reads the blinking of the led(morse code) and data is transmits to Morse decoder where it is converted back to ASCII. The converted ASCII is then transmitted to end user PC for display. We have already designed the top level top level block diagram. we now need the source codes(entity and architecture) for the blocks and test benches for all blocks for simulation...