I downloaded the bitfile to NEXYS2.
After trying "adv_jtag_bridge xpc3", I got the messages below:
I have no idea what caused this problem.


Connected to parallel port at 378
Dropping root privileges.
Enumerating JTAG chain...

Devices on JTAG chain:
Index Name ID Code IR Length
----------------------------------------------------------------
0: XCF04S 0xF5046093 8
1: XC3S1200E_FG320 0x21C2E093 6

Target device 0, JTAG ID = 0xf5046093
Xilinx IDCODE, assuming internal BSCAN mode
(using USER1 instead of DEBUG TAP command)
ERROR! Unable to find DEBUG command for device index 0, device ID 0xF5046093
Unable to find DEBUG command, aborting.



Thank you for your reply.

Hi, you have to run the following command instead:
adv_jtag_bridge -x1 xpc3

Thank u for your favor. And it works now.

But I meet another problem at the result in displaying "hello world".

The words shown in the minicom is as the picture(like"??????????"), I am wondering anyone could give me some suggestion.

Thanks!

http://minsoc.com/minsoc_faq#while_running_uart_firmware_example_on_my_fpga_the_data_shown_by_my_computer_s_terminal_are_weird_characters_instead_of_hello_world