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为什么我在C6455板子上跑EDMA完成中断,会进入两次中断程序



在执行中断的函数里加了打印语句printf("I'm datain_isr");,进行软件仿真时只打印一次,用板子跑的时候却打印了两次,后在中断函数打断点发现中断函数执行了两次。请问为什么会出现这样的问题?