拓普微串口触摸屏底层驱动程序，包括51 单片机，和STM32的例程，程序包含画点画线，读数据、写数据，读按键等功能(Tuopu serial port touch screen driver, including 51 SCM, and STM32 routine, the program includes drawing dot line, read data, write data, read the keys and other functions)