EVM6657的开发板突然连接不上了

EVM6657L选择Texas instruments xds100v1 USB Emulator。你这是突然链接不上么，之前是可以链接么，感觉像是供电有问题，对照EVM6657 schematic测量一下各个供电输入电压是否正常。
                                                                          

之前是一直都能连上的，一个月没用板子了突然就连不上了。。。不只xds100仿真器用不了，xds200 的仿真器也是用不了。。

xds200 Emulator只在EVM6657LS上有，EVM6657L上只有xds100v1 USB emulator，用emulator 配置文件上的test configuration测试一下，把log发上来。
                                                                          

这是xds100v1 的test connection的结果，显示是成功的，但是实际连接板子的时候就不行了，会出现帖子中的情况，log如下：
[Start]
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:UsersADMINI~1AppDataLocal.TI1408570284
0BrdDattestBoard.dat
-----[Print the reset-command software log-file]-----------------------------
This utility has selected a 100- or 510-class product.
This utility will load the adapter 'jioserdesu***.dll'.
The library build date was 'Aug 30 2012'.
The library build time was '21:58:20'.
The library package version is '5.0.838.0'.
The library component version is '35.34.40.0'.
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).
-----[The log-file for the JTAG TCLK output generated from the PLL]----------
There is no hardware for programming the JTAG TCLK frequency.
-----[Measure the source and frequency of the final JTAG TCLKR input]--------
There is no hardware for measuring the JTAG TCLK frequency.
-----[Perform the standard path-length test on the JTAG IR and DR]-----------
This path-length test uses blocks of 512 32-bit words.
The test for the JTAG IR instruction path-length succeeded.
The JTAG IR instruction path-length is 6 bits.
The test for the JTAG DR bypass path-length succeeded.
The JTAG DR bypass path-length is 1 bits.
-----[Perform the Integrity scan-test on the JTAG IR]------------------------
This test will use blocks of 512 32-bit words.
This test will be applied just once.
Do a test using 0xFFFFFFFF.
Scan tests: 1, skipped: 0, failed: 0
Do a test using 0x00000000.
Scan tests: 2, skipped: 0, failed: 0
Do a test using 0xFE03E0E2.
Scan tests: 3, skipped: 0, failed: 0
Do a test using 0x01FC1F1D.
Scan tests: 4, skipped: 0, failed: 0
Do a test using 0x5533CCAA.
Scan tests: 5, skipped: 0, failed: 0
Do a test using 0xAACC3355.
Scan tests: 6, skipped: 0, failed: 0
All of the values were scanned correctly.
The JTAG IR Integrity scan-test has succeeded.
-----[Perform the Integrity scan-test on the JTAG DR]------------------------
This test will use blocks of 512 32-bit words.
This test will be applied just once.
Do a test using 0xFFFFFFFF.
Scan tests: 1, skipped: 0, failed: 0
Do a test using 0x00000000.
Scan tests: 2, skipped: 0, failed: 0
Do a test using 0xFE03E0E2.
Scan tests: 3, skipped: 0, failed: 0
Do a test using 0x01FC1F1D.
Scan tests: 4, skipped: 0, failed: 0
Do a test using 0x5533CCAA.
Scan tests: 5, skipped: 0, failed: 0
Do a test using 0xAACC3355.
Scan tests: 6, skipped: 0, failed: 0
All of the values were scanned correctly.
The JTAG DR Integrity scan-test has succeeded.
[End]
xds100v2的测试结果不成功，结果如下：
[Start]
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:UsersADMINI~1AppDataLocal.TI1408570284
0BrdDattestBoard.dat
-----[Print the reset-command software log-file]-----------------------------
This utility has selected a 100- or 510-class product.
This utility will load the adapter 'jioserdesu***.dll'.
The library build date was 'Aug 30 2012'.
The library build time was '21:58:20'.
The library package version is '5.0.838.0'.
The library component version is '35.34.40.0'.
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).
-----[The log-file for the JTAG TCLK output generated from the PLL]----------
There is no hardware for programming the JTAG TCLK frequency.
-----[Measure the source and frequency of the final JTAG TCLKR input]--------
There is no hardware for measuring the JTAG TCLK frequency.
-----[Perform the standard path-length test on the JTAG IR and DR]-----------
This path-length test uses blocks of 512 32-bit words.
The JTAG IR instruction path-length was not recorded.
-----[Perform the Integrity scan-test on the JTAG IR]------------------------
This test will use blocks of 512 32-bit words.
This test will be applied just once.
Do a test using 0xFFFFFFFF.
Scan tests: 1, skipped: 0, failed: 0
-----[An error has occurred and this utility has aborted]--------------------
This error is generated by TI's USCIF driver or utilities.
The value is '-183' (0xffffff49).
The title is 'SC_ERR_CTL_CBL_BREAK_FAR'.
The explanation is:
The controller has detected a cable break far-from itself.
The user must connect the cable/pod to the target.
[End]

要是连接xds200的仿真器的话就出现这种问题。。。测试了下电源电压和芯片电压，都是正常的，实在不知道问题出在哪了   ，，，，，求助~~~~~~~~~~~

[Start]
Execute the command:
%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -r -o -S pathlength -S integrity
[Result]

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 '-180' (0xffffff4c).
The title is 'SC_ERR_CTL_NO_TRG_POWER'.
The explanation is:
The controller has detected a target power loss.
The user must turn-on or connect the power supply for the target.
[End]

求救~~~~~

看下  6657的开发板上面的跳线，j4,j5   j4断开，j5要装跳线帽

真大神~~~