这个接口卡程序负责采集低频音频信号，USB控制芯片采用AN2131QC。软件包括3个模块：Keil51编写芯片固件程序，vc++编写USB驱动程序和用户程序-the interface card collection procedures for low-frequency audio signals, control chips using USB Peripheral. The software includes three modules : the preparation Keil51

CH341是一个USB总线的转接芯片，通过USB总线提供串口、打印口或者并口。 在串口方式下，CH341提供串口发送使能、串口接收就绪等交互式的速率控制信号以 及常用的MODEM联络信号，用于将普通的串口设备直接升级到USB总线。 -CH341 is a USB bus adapter chips, provided through the USB serial bus, printer port or parallel port. In serial mode, CH341 Send