程序实现的内容是通过控制KEY2，KEY4两个按键作为中断INT0和INT1，在一定实验条件下，可以实现发光二极管右循环，终止循环，变向循环等功能。具体是运行程序后，8个发光二极管从左到右逐个点亮熄灭，并不断循环。如果此时按下KEY4出发INT1，发光二极管循环过程停止，并且在数码管2上用数字现实当前发光二极管所在的位置，再按下KEY2时恢复发光二极管循环过程。其中库函数根据实验台而定。-The content of the program is to control KEY2, KEY4 two buttons as interrupt INT0 and INT1 under certain experimental conditions, the light-emitting diode right loop, the loop is terminated, and change to recycling and other functions. Specifically to run the program, eight light-emitting diodes from left to right by-lighted, and continue to cycle. If the press KEY4 starting the INT1 emitting diode cycle stops, and in the digital tube 2 by digital reality this position where the light emitting diode, and restored when the light emitting diode and then press KEY2 cycle. Library functions according to the bench.