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点击Test Connection时无法连接AM5728芯片

Other Parts Discussed in Thread: AM5728

CCS版本:V7.2

仿真器:XDS200

TI芯片:AM5728

以下是连接的报错信息:

[Start: Texas Instruments XDS2xx USB Debug Probe_0]

Execute the command:

%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -rv -o -S integrity

[Result]


-----[Print the board config pathname(s)]------------------------------------

C:\Users\taozi\AppData\Local\TEXASI~1\CCS\
ti\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 23 2017'.
The library build time was '19:03:48'.
The library package version is '6.0.628.3'.
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_0]

什么原因导致连接不成功,一直没有解决,这个问题有人能帮助我吗?

另外我发现一个我不懂的地方,在原理图中JTAG_RSTn一直都是拉低的:

但是我在手册中又看到说有拉高,最后才是拉低,会不会是这个地方引起的: