280049仿真器连不上dsp

DSP一直处于复位状态（应该是看门狗触发的），然后仿真器连不上DSP，报IcePick_C_0: Error connecting to the target: (Error -233 @ 0x0) 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. (Emulation package 8.0.27.9)

这个错误。

Green Deng：

你好，你的板子是自己设计的吗？是否有启用看门狗？使用的仿真器是哪款？

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dengji liu：

程序中有开看门狗，板子是我们自己设计的，用的是xds100v3，现在是dsp不停的重启，仿真器始终连不上。尝试测试仿真器连接，反馈信息如下：[Start: Texas Instruments XDS100v3 USB Debug Probe_0]

Execute the command:

%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -rv -o -F inform,logfile=yes -S pathlength -S integrity

[Result]

—–[Print the board config pathname(s)]————————————

C:\Users\ADMINI~1\AppData\Local\TEXASI~1\CCS\ti\1\0\BrdDat\testBoard.dat

—–[Print the reset-command software log-file]—————————–

This utility has selected a 100- or 510-class product.
This utility will load the adapter 'jioserdesusbv3.dll'.
The library build date was 'May 30 2018'.
The library build time was '23:03:35'.
The library package version is '8.0.27.9'.
The library component version is '35.35.0.0'.
The controller does not use a programmable FPGA.
The controller has a version number of '4' (0x00000004).
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]—————————–

The scan-path will be reset by toggling the JTAG TRST signal.
The controller is the FTDI FT2232 with USB interface.
The link from controller to target is direct (without cable).
The software is configured for FTDI FT2232 features.
The controller cannot monitor the value on the EMU[0] pin.
The controller cannot monitor the value on the EMU[1] pin.
The controller cannot control the timing on output pins.
The controller cannot control the timing on input pins.
The scan-path link-delay has been set to exactly '0' (0x0000).

An error occurred while hard opening the controller.

—–[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 XDS100v3 USB Debug Probe_0]

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dengji liu：

能提示以下，可能是哪里的问题吗？换了一块板子，程序刷进去了两次，然后第3次就识别不了仿真器，目前程序是可以正常运行的，就是连不上仿真器，报的错误和上面一模一样。

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Green Deng：

尝试一下将复位手动拉低，然后连接仿真器。等到连接成功后再擦写程序。

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da qin zheng sheng：

看门狗经常复位，程序应该不能稳定工作的。看门狗去掉再试试。

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da qin zheng sheng：

看门狗经常复位，程序应该不能稳定工作的。看门狗去掉再试试。