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建议看一下sys/bios手册，看报错与GateMutex有关，可以去看一下GateMutex的使用限制。 www.ti.com/.../spruex3v.pdf
GateMutex uses a binary Semaphore as the locking mechanism. Each GateMutex instance has its own
unique Semaphore. Because this gate can potentially block, it should not be used a Swi or Hwi thread,
and should only be used by Task threads.
另外为什么要在GPIO中断中调用使能EMDA3呢？
