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AM3358使用GPIO中断,中断频率一高就出问题



写了一个GPIO中断的驱动文件,GPIO中断200us一次时,我每进一次中断会拉一下管脚,同时程序里有3个线程,用示波器看管脚,有的时候频率正确,但有的时候会将近3~400us才拉。如果不跑其他线程,光GPIO中断一个是正常的。或者GPIO中断频率1S一次就也能正常。

我想问这是我程序有问题,还是在LINUX系统下就是会这样的