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am5728 dsp时钟和复位后,ccsv7无法连上核,打印如下信息

C66xx_DSP1: 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 7.0.100.0) 

我的仿真器是没问题的,我uboot添加了对dsp核的时钟和复位设置(DPLL uboot没配置),如果我再添加DSP的DPLL配置,就会发生如上错误。如果我不添加DPLL,我的dsp程序就无法正常启动。问题是,如果我不在DSP中添加DPLL配置,我能正常连上DSP核,并且在memory browser中修改寄存器的DPLL配置后,我的dsp程序可以正常启动。可以总结为

(uboot已经对dsp核有时钟配置和复位操作)

1.uboot,不加dsp dpll配置,ccs正常连接dsp核,但由于没配置DPLL,程序异常。

2.uboot + dsp dpll配置,ccs大部分次数连不上dsp核,连上的次数正常运行程序。

3.uboot,不加dsp dpll配置,ccs正常连接dsp核后,修改寄存器配置dpll,程序正常

请问我该如何解决,和pcie等什么会有关系吗