用fpga实现8个led循环亮，按键可以控制其随时停止和开始

+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ ; Legal Partition Candidates ; +-----------+-------+----------------+--------------+----------------+--------+-----------------+---------------+-----------------+-------+----------------+--------------+------------------+-------------------+ ; Hierarchy ; Input ; Constant Input ; Unused Input ; Floating Input ; Output ; Constant Output ; Unused Output ; Floating Output ; Bidir ; Constant Bidir ; Unused Bidir ; Input only Bidir ; Output only Bidir ; +-----------+-------+----------------+--------------+----------------+--------+-----------------+---------------+-----------------+-------+----------------+--------------+------------------+-------------------+ ; inst1 ; 2 ; 0 ; 0 ; 0 ; 1 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; ; inst ; 3 ; 0 ; 0 ; 0 ; 8 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; 0 ; +-----------+-------+----------------+--------------+----------------+--------+-----------------+---------------+-----------------+-------+----------------+--------------+------------------+-------------------+