【摘要】 基于PDIUSBD12的USB驱动程序,由USB协议、中断处理等组成。设备连接后,主机发送包含标准USB请求的控制传输,PDIUSBD12产生一个中断给MCU,MCU再通过读PDIUSBD12的中断寄存器和最后一次传输状态寄存器对每个请求作出响应,并回送请求信息。主机从返回的信息中读取描述数据,分配和载入一个设备驱动程序并对设备进行配置。其PC机驱动程序则包括I/O请求包、开始程序及编译连接驱动程序等。更多还原

【Abstract】 Based on PDIUSBD12, the USB driver program is compsed of USB protocol, interruption processing and so on. After connecting, the host PC sent control transmistion which included stabdard USB request; a interrruption was generated by PDIUSBD12 and sent to MCU; then, through reading interruption register in PDIUSBD12 and lastest-time transmition situation register, the MCU responsed to every request and sent back reques information. The host PC read the description data from return information, distributed, load and configured an equipment driver program. Its PC driver program includes I/O rrequest package, begin program, compiling connection driver program and so on.更多还原