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BlackhawkUSB560bp仿真器连接不上c6674电路板

Other Parts Discussed in Thread: TMS320C6674

各位技术同仁:

       我设计了基于TMS320C6674的电路板(借鉴TI的C6678EVM原理图,不需要功能进行了裁剪),用BlackhawkUSB560bp仿真器在CCS5.2版本下无法连接目标板(没有GEL文件),Retry几次后偶尔连接上,但提示CORE状态running,连接不上时提示错误信息如下:

Error connecting to the target:

(Error -1144 @0x0)

Device core is hung,The debugger attempted to recover debug control,but was unsuccessful,Power-cycle the board, If error persists,confirm configuration and/or try more reliable JTAG settings(e.g. lower TCLK).(Emulation package 5.0.520.0)

即使重新上电,或者降低仿真器TCLK频率,也是同样问题,我不知道这到底是什么问题引起的错误。