Hi:
中断只能设置成上升缘/下降缘触发,而使用的外部芯片是底电平触发。在中断函数中对外部芯片读数据,其中断脚会升高。程序运行多次后会出现无法进入中断,此时中断脚是底电平的。怀疑是在中断处理退出前外部芯片又拉低了中断脚。应该怎样处理这样的情况?
谢谢!
Roy
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