LED电子显示屏和控制器的控制程序。显示屏通过按键切换显示数字和字母，显示屏能显示4组特定数字或者英文字母组成的句子，通过按键切换显示内容，本例为整屏四个字一起显示的程序。-Button to toggle through the display of numbers and letters, the display can show four groups composed of specific numbers or letters of sentences, by switching the display button, in this case the words together for the whole screen display program.