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there is a lot of simple programs which u can use to check the UART, u can use it to send data and see the received date.u can search for one of thyem.
mikroc a pic microcontroller compiler has a powerful UART terminal which u can use.
B4 checking on hyperterminal of a host PC, first try to check your functionality of UART within the FPGA And then check the voltage levels at the output of the FPGA by sending rs232 data. It must be 3.3V compatible to detect it on PC. IF not then convert your voltage to 3.3V level.
If you are done with all the stuff told by other friends and still not able to get the response, then check which cable are you using.... "cross" or "straight"??? Find out which one is suitable for your code..