公交巴士屏控制盒程序，具有前后屏幕内容更换与刷新功能，并可通过串口连接上位机软件实现对巴士屏内容的输入和更新。-BUS-screen control box program, has front and rear replacement and refresh the screen contents, and can achieve input on bus-screen content and update the software through the serial port to con