vhdl truth table
i am reading now a book of Enoch Hwang. about digital design. i covered combinational elements already. and as i see from the book, in the beginning he describes every circuit with truth table,karnaugh maps, logical expressions,then he gives the circuit... at last he gives VHDL code, which looks so easy.. and after looking at this VHDL code, i think do i even have to mess with digital circuits,logical expressions,and karnaugh maps?
for karnaugh maps i am sure no...
but now i want to see how YOU, the experienced ppl do begin to write your VHDL code, i mean from what exactly you begin?
for example, lets say i must design 8-bit ALU, which does logical and arithmetic operations from scratch using VHDL. so what to begin first with?
and the second question is, as i saw there are three types of VHDL coding: structural, dataflow, and behavior... which one is better to be used? what do You use?
thanks