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C6748连接XDS510-USB2.0仿真器错误

TMS320C6748  仿真器用的是TI的XDS510-USB2.0

连接的时候出现以下error:

Error connecting to the target:
Error 0x80000244/-2131
Fatal Error during: Register, Initialization, OCS,
Cannot access register at 0x00000000
I/O Port = 240

Board Name: XDS510_C6748
Cpu Name: ICEPICK_C_0

Abort:  Close Code Composer Studio.
Retry:  Try to connect to the target again.
Cancel:  Remain disconnected from the target
Diagnostic: Run diagnostic utility.

运行XDS510USB_probe.bat出现问题:

Event3 pin read back of one failed.

Counter1 carry bit test failed at bit ff.

这是什么问题,要怎么解决啊?????????????