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有一个任务我需要每秒钟处理300次。一开始用osal_start_timerEx（）函数，但这个函数定时的单位是ms，不能准确的定到300Hz。请问能不能用最底层的定时器中断来实现，程序上怎么实现呢？（有一个伪代码的框架就行，谢谢）。
