中断服务子程序内容：灯全部熄灭，2秒钟后发光二极管全部点亮，再过1秒钟后中断返回。

The contents of the interrupt service routine: all the lights off, 2 seconds later all the light-emitting diode, another 1 second to return after the break.

youdao

中断服务子程序内容：灯全部熄灭，2秒钟后发光二极管全部点亮，再过1秒钟后中断返回。

The contents of the interrupt service routine: all the lights off, 2 seconds later all the light-emitting diode, another 1 second to return after the break.

youdao