Using Digilent Nexys 2 board which has a rs232 port (uses the Spartan 3E
Trying to test the rs232, i have a usb to rs232 cable and i use Putty
which all seems to be working ok. So i wrote this for the FPGA to loop
back RX and TX so the fpga would just echo back what ever data it got.
entity top is
Port ( rxd : in STD_LOGIC;
txd : out STD_LOGIC);
architecture Behavioral of top is
txd <= rxd;
Unfortunately once put on the fpga i can't write anything in the
terminal which i think is because the fpga is not echoing back the data.
Can anyone see the problem here? Or have a better way to test the rs232?