/* Example 18: RS232 loopback echoing (with LED-debugging). */
/* See Antti Lukats' message on comp.lang.verilog,comp.arch.fpga newsgroups
   with subject: Re: Verilog Code for echo on Serial Port
   posted on Wed, 11 Jan 2006 16:36:30 +0100 
 */

module esim18(SW_IN,RXD,TXD,LED_OUT);
input SW_IN;
input RXD;
output TXD;
output [1:0] LED_OUT;
/* assign TXD = SW_IN; */
/* assign LED_OUT = SW_IN; */
assign TXD = RXD;
assign LED_OUT[0] = RXD;
assign LED_OUT[1] = SW_IN;
endmodule