C51的Usb实现代码及其固件工程文档，开发包(lib)，及其相应函数.文件列表: c51的USB的通信程序库，支持51兼容的单片机 ........................................\usb_softpack ........................................\............\demo程序及开发板 ........................................\............\.........\D12 USB固件编程.pdf ........................................\............\.........\d12smart_users_manual.pdf ........................................\............\................\Isr.c ........................................\............\................\isr.h ........................................\............\................\Isr.LST ........................................\............\................\Isr.OBJ ........................................\............\................\Mainloop.c ........................................\............\................\MAINLOOP.H ........................................\............\................\Mainloop.LST ........................................\............\................\Mainloop.OBJ ........................................\............\................\USB51S.LIB ........................................\............\................\USBDEMO ........................................\............\................\usbdemo.ddk ........................................\............\................\usbdemo.edk ........................................\............\................\USBDEMO.M51 ........................................\............\................\usbdemo.mpf ........................................\............\................\usbdemo.Opt ........................................\............\................\usbdemo.Uv2 ........................................\............\................\usb_i2c ........................................\............\................\usb_i2c.hex ........................................\............\................\usb_i2c.M51 ........................................\............\................\usb_i2c.plg ........................................\............\............\致USB用户的公开信.pdf ........................................\............\USB_lib ........................................\............\.......\Isr.c ........................................\............\.......\isr.h ........................................\............\.......\USB51S.LIB……