ex_2_3_4_consolw_io.vhd

来自「This is the course for VHDL programming」· VHDL 代码 · 共 19 行

use std.textio.all;
entity console is end console;
architecture beh of console is
begin
  process 
	variable LOUT, LIN : LINE ;
	variable N: integer;
  begin
   write(LOUT,string'("Please enter a number"));--Form ASCII string at LOUT
   writeline(OUTPUT, LOUT) ; --Give prompt message to console
	readline(INPUT, LIN);	--Wait for user input
	read(LIN,N);			--Convert LINE buffer to integer at N 
   write(LOUT, string'("You typed "));	-- Form ASCII string at LOUT
   write(LOUT, N);		--Convert N to ASCII string at LOUT
   writeline (OUTPUT, LOUT) ; --Send LOUT to console
   wait;
  end process;
end beh;