This libusb version 0.1.12. libusb is a library which allows
userspace application access to USB devices.
The official ftp site is:
ftp://ftp.libusb.sourceforge.net/pub/libusb/
The official web site is:
http://libusb.sourceforge.net/
A mailing list is located at:
libusb-devel@lists.sourceforge.net
Libusb-win32 is a library that allows userspace application to access USB
devices on Windows operation systems (Win98SE, WinME, Win2k, WinXP).
It is derived from and fully API compatible to libusb
The purpose of this application note is to describe the main elements of
an RS-422 and RS-485 system. This application note attempts to cover
enough technical details so that the system designer will have considered all
the important aspects in his data system design. Since both RS-422 and RS-
485 are data transmission systems that use balanced differential signals, it is
appropriate to discuss both systems in the same application note. Throughout
this application note the generic terms of RS-422 and RS-485 will be used to
represent the EIA/TIA-422 and EIA/TIA-485 Standards.
本次設(shè)計的RS232 to USB 轉(zhuǎn)換器采用HT82M99E 和MAX232 芯片,其中HT82M99E 為主控芯片,MAX232
為RS232 level shift。本次設(shè)計的RS232 to USB 轉(zhuǎn)換器使用操作系統(tǒng)提供的USB HID 設(shè)備類驅(qū)動程序。
This driver is based on the 2.6.3 version of drivers/usb/usb-skeleton.c
but has been rewritten to be easy to read and use, as no locks are now
needed anymore.