C8051F020单片机USB驱动程序例子，实现ADC0采样芯片温度，通过LCD显示，并通过串口0再经过CP2102芯片“UART-USE”（J19）发送到PC机。-C8051F020 MCU USB driver for example, to achieve ADC0 sampling chip temperature, through the LCD display, and through the serial port 0 go through CP2102 chip, " U