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Google一番没有结果。比如 ，要使用GPIO39 工作在下降沿中断输入模式，以便快速影响触发信号且不丢失? 内模怎样配置，.DTS文件怎样写？怎样映射系统中断号？
参考这里：https://github.com/widora/ctest/blob/master/kmods/klirc/lirc.c