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之前用DSP/bios调度了几个周期性的软中断,现在想试试用sys/bios,但是发现sys/bios没有PRD模块,只可以用Clock。但是Clock开的函数只可以公用一个优先级,请问我如何在sys/bios中实现原来的调度机制?就是用软中断开的几个线程,这几个线程的中断优先级不一样,然用调度使用