我安装了CCSv6.2，通过USB线（一头是标准USB口、另一头是miniUSB口）连接PC和EVMK2HX开发板上miniUSB口（是母版的口，即红色按钮旁边那个口，不是DSP板上的口），在CCS上新建NewTargetConfiguration进行连接测试（参数设置为Connection：XDS2xx USB Onboard Debug Probe，Board or Device：66AK2H12），但一直都显示无法打开端口：
[Start: Texas Instruments XDS2xx USB Onboard Debug Probe_0]
Execute the command:
%ccs_base%/common/uscif/dbgjtag -f %boarddatafile% -rv -o -S integrity
[Result]
-----[Print the board config pathname(s)]------------------------------------
/root/.ti/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'.
E_RPCENV_IO_ERROR(-6) No connection: DTC_IO_Open::dtc_io
Failed to open i/o connection (xds2xxu:0)
An error occurred while soft 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 '-250' (0xffffff06).
The title is 'SC_ERR_ECOM_EMUNAME'.
The explanation is:
An attempt to access the debug probe via USCIF ECOM has failed.
[End: Texas Instruments XDS2xx USB Onboard Debug Probe_0]
我分别在Ubuntu14.04和Windows7上安装了CCSv6.2，都出现这个问题，但我在Ubuntu终端中执行“picocom -b 115200 /dev/ttyUSB0”就可以进入开发板的Linux命令行。另外，执行更新固件的命令也报错：
C:\ti\ccsv6\ccs_base\common\uscif\xds2xx>xds2xx_conf get xds2xxu 0
Error : Failed to open port connection : xds2xxu : 0
Error : test failed
我看了TI提供的support页面，基本推断就是PC和开发板连接存在问题：
processors.wiki.ti.com/.../Debugging_JTAG_Connectivity_Problems
processors.wiki.ti.com/.../XDS200
请问大神：EVMK2HX是否可以和PC由USB线直连，中间不需要仿真器之类的装置？
按理说CCSv6.2已经自带了必要驱动，我在Windows中连接开发板后显示驱动都已正常安装，是不是直接USB直连不行呢。。
如果需要仿真器的话，开发板上的miniUSB口是什么场景下用的呢？
