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- printf的地方有问题，加多了会导致整个bin起不来， 具体原因需要分析。使用rt_thread就没有问题了。
- 打开关闭日志是编译时完成的， 把对应宏定义为1就可以
- rtt如果堆栈设置的小的话很容易出堆栈问题， 因为堆栈设置的太小。