用于与USB接口设备通讯的上位机程序，可将下位机USB接口设备传输的数据送至PC机并处理。每次数据传送都是上位机主动，上位机先发送命令（借用DEMO程序中的版本号部分），下位机收到READ_VERSION命令就发送64字节数据给上位机，并开始计时，每次发送把发送帧数加1，把时间和帧数发送到上位机显示，方便观察；上位机收到64字节数据就又给下位机发送READ_VERSION命令，重复1000次，测试需时31秒左右。64字节中：第2，3字节是发送帧数，第61字节是通信时间（S）-USB interface for PC communication procedures, could be the next-bit machine USB interface data transmission to the PC machine and processed. Each data transmission are PC initiative, the first host computer to send the command (to borrow DEMO program version number part), the next-bit machine READ_VERSION received orders on the transmission of 64 bytes of data to the host computer, and start running, each time I send to Send fr a mes plus 1, the time and number of fr a mes sent to the host computer for easy observation　upper 64 bytes of data received on the given machine to send the next bit READ_VERSION command, repeat 1000 times, test takes about 31 seconds. 64-byte: the first 2,3-byte fr a me is sent, 61 bytes is the communication time (S)