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在使用Jtag口调试C6748的过程中突然报错：
Error connecting to the target:
(Error -2131 @ 0x0)
Unable to access device register. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK).
(Emulation package 9.2.0.00002)
Jtag尝试连接也失败：
[Start: Texas Instruments XDS2xx USB Debug Probe]
Execute the command:
%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -rv -o -S integrity
[Result]
—–[Print the board config pathname(s)]————————————
C:\Users\******\AppData\Local\TEXASI~1\
CCS\ccs1010\0\0\BrdDat\testBoard.dat
—–[Print the reset-command software log-file]—————————–
This utility has selected a 560/2xx-class product.
This utility will load the program 'xds2xxu.out'.
The library build date was 'May 7 2020'.
The library build time was '20:23:44'.
The library package version is '9.2.0.00002'.
The library component version is '35.35.0.0'.
The controller does not use a programmable FPGA.
The controller has a version number of '13' (0x0000000d).
The controller has an insertion length of '0' (0x00000000).
This utility will attempt to reset the controller.
This utility has successfully reset the controller.
—–[Print the reset-command hardware log-file]—————————–
This emulator does not create a reset log-file.
—–[An error has occurred and this utility has aborted]——————–
This error is generated by TI's USCIF driver or utilities.
The value is '-233' (0xffffff17).
The title is 'SC_ERR_PATH_BROKEN'.
The explanation is:
The JTAG IR and DR scan-paths cannot circulate bits, they may be broken.
An attempt to scan the JTAG scan-path has failed.
The target's JTAG scan-path appears to be broken
with a stuck-at-ones or stuck-at-zero fault.
[End: Texas Instruments XDS2xx USB Debug Probe]
之前使用过程中一直问题
在多块板子当中有3块出现了这样的问题
换了电脑，仿真器问题依然存在
硬件检查的了连接信号正常
请问还有其他可能的原因嘛？
谢谢
Nancy Wang：
电源/复位信号检查过吗？以下帖子先参考看一下。
e2echina.ti.com/…/192692
