这是12864的一个测试代码，大家可以参考下，12864是一个经典的入门级屏幕，大家可以先尝试没有字库的，其实这也很容易的，这样你做其他屏幕就会非常简单。-This is a test code 12864, you can refer to, 12864 is a classic entry-level screen, we can first try without character, in fact, it is also very easy, so you do the other screen will be very simple.