Forum Discussion
Altera_Forum
Honored Contributor
15 years agoYou should show a Verilog port definition of four_bit_adder for clarity. However, if the bit identifier A[0] appears in the module's port list, it's not a port name. The port is unnamed in this case and you can't use named notation in instantiation of the module. Use positional instantiation instead, or change the port definition of the module to use simple identifiers.