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6678dsp 挂仿真器 程序跑飞

诸位好:

      我在项目中这样使用6678 DSP:将监控程序烧写到nor flash,加电后程序正常运行,进行了初始化工作,包括pll、ddr、同时关闭cache,运行一段时间后,需要通过仿真机进行调试应用程序,将应用程序load后,不能进入main函数,会出现程序直接跑飞的现象,点击暂停按钮,出现如下错误:trouble halting target CPU,no device bus slot available to service the request. Upgrade this request to high priority to force the device to generate a bus slot to service the request. Note that this would be intrusive to your problem.

      使用别的DSP,没有这个问题,判断应用程序没有问题,而且监控程序已经配置好了ddr等。请问可能是硬件问题吗?或者是软件哪里需要配置?非常感谢:)