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C6678 中断函数中句柄close失败



您好:

我使用DMA进行传输传输,配置DMA时会open会返回一个句柄,DMA传输完成进入中断函数后,我在中断函数中close这个DMA句柄,但是现实close失败.DMA句柄我设置成全局.

请问这是什么原因?谢谢!