I change reset signals of tag_top.v and designs in adv_debug_sys to low asynchronous active. As follows:
tag_top.v assign test_logic_reset_o = test_logic_reset; => assign test_logic_reset_o = ~test_logic_reset;

i_dbg_wb.v biu_rst =rst_i | biu_clr_err; => biu_rst = rst_i & (~biu_clr_err);

and other codes in always block. always @(posedge clk or negedge rst_i)

Before my change, it works, althrough unstable. But now it doesn't work. It repors:


adv_jtag_bridge ft245
'usb_blaster' interface using libftdi
current latency timer: 2
Enumerating JTAG chain...

Devices on JTAG chain:
Index Name ID Code IR Length
----------------------------------------------------------------
0: (unknown) 0x14951185 -1

Target device 0, JTAG ID = 0x14951185
ERROR! Unable to autoprobe IR length for device index 0; Must set IR size on command line. Aborting.

I wonder how I can fix the problem. Is there good material to analyze jtag and adv_debug_sys code?
Are there ways to simulate jtag and adv_debug_sys rtl code?