首先，用发光二极管控制所显示的数字是奇数还是偶数，然后，通过8段数码管显示数字并同时在arm开发板的lcd上显示相同的数字。-First of all, using light-emitting diode control shows number is odd or even number, and then, through the eight period of digital tube display digital and at the same time in the arm dev