reorder declarations to before they are used by sdu
add sdu sources to Makefile.srcs
end lines with semicolons
syntax error on combining signals, missing reg
include ram.v
fix names in ram (in_data -> wr_data, etc)
compiler changes; will add to .gitignore if they change each compile
sdu_rx_en is input in sdu_rx
sdu_ave_done_strobe is input to sdu_rx
sdu_tx_en and sdu_seq_done_strobe are inputs to sdu_tx
inputs can't be regs