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27 Jul 09

Linux USB

This web site was created to serve as a central point of information for USB support under Linux. We've released our first press release.

www.linux-usb.org - Preview

Linux USB

24 Jun 09

Re: Re 4 : usb interrupt read failures further information

article.gmane.org/...198 - Preview

USB

the maximum buffer size these functions can handle is currently limited to 64k bytes
(a limit of the Windows kernel)

09 May 09

本書捨棄了標準的USB微處理器(例如，Cypress EZ-USB系列)，特別採用了一般的8051微處理機來設計USB裝置，以提高整個USB裝置設計的彈性與便利性。而透過8051與USB主/從介面晶片組的結合可以很輕易地設計出一個完全符合規格的USB主裝置與從裝置。在本書中，分別以Philips的PDIUSBD11與PDIUSBD12 USB從晶片組來設計USB週邊裝置，另以Cypress的SL811HS USB主晶片組來設計出能連接HID滑鼠、HUB與Mass Storage裝置的USB主裝置。而後者，更可以實現模擬一個虛擬的主機端的功能

www.books.com.tw/...booksfile.php - Preview

book choice USB embedded

06 May 09

USB Complete 3rd Edition

proyectosfie.com/libro - Preview

book USB

03 May 09

USB Complete

USB Complete: Everything You Need to Develop Custom USB Peripherals

books.google.com/books - Preview

book choice USB

28 Apr 09

USB Sniffer試用心得

在Windows上使用USB Sniffer，看起來大家都推SnoopyPro，這是一套OpenSource軟體，使用方式很容易，如下即可：

ycfunet.blogspot.com/2007_06_01_archive.html - Preview

USB sniffer

24 Apr 09

USB Device Descriptors

There's been a bit of confusion concerning the USB Device Descriptors, so I thought I'd do another informational post to clear things up a bit.

fourwalledcubicle.com/...114 - Preview

USB descriptor

The Device Descriptor is mandatory, and only one is allowed for each USB device.
Configurations are mutually exclusive to one-another; the host may select any one of the configurations at any one time, but cannot use multiple configurations at once.
3 more annotations...
- like the Configuration descriptor each interface can have multiple entries which can change the interface’s function depending on which one is selected.
- even if a device’s features is not selected, bandwidth is still used by the host for checking the interface’s endpoints. Thus, for audio interfaces (which use up a lot of data), an alternate setting with no endpoints is added so that when the microphone is unused, the host can turn off the endpoint and save on USB bandwidth.
- Address 0 is reserved, and is used for the control endpoint that is present on all USB devices for host-device control requests. Endpoint 0 does not need an explicit Endpoint Descriptor — it is mandatory and thus does not need to be described

22 Apr 09

USB Audio Streamer

The idea for creating a USB sound card based on a PIC came from discussions of other people creating one on the Microchip USB forum. The hardware of the card is based on all Microchip products.

www.raccoonrezcats.com/soundcard.html - Preview

USB audio embedded PIC

the other device is a custom interface based on a HID
interface. The purpose of the custom interface is for programming the device
serial number, upgrading the firmware, and in the future any other
configuration that isn’t supported directly by USB Audio 1.0

10 Apr 09

USB.org - Approved Device Class Document Download

www.usb.org/...devclass_docs - Preview

USB audio

01 Apr 09

不用USBASP芯片也可用USB，纯AVR实现USB通讯

www.eehome.cn/...index.php - Preview

AVR USB libusb DPInst

20 Mar 09

libusb 簡介與第一個範例

[libusb] 是一個 user-space 的 USB 程式庫，在 embedded linux 應用實作上，我們會使用 libusb 實作一個 host 端的應用程式，並透過 USB 介面存取或控制 target device。

www.jollen.org/...libusb_hello_world.html - Preview

libusb USB driver

17 Dec 08

LibUsb-Win32

Libusb-win32 is a port of the USB library libusb to the Windows operating systems (Win98SE, WinME, Win2k, WinXP). The library allows user space applications to access any USB device on Windows in a generic way without writing any line of kernel driver code.

libusb-win32.sourceforge.net - Preview

USB driver win32

18 Oct 08

USB Sniffer試用心得

在Windows上使用USB Sniffer，看起來大家都推SnoopyPro，這是一套OpenSource軟體，使用方式很容易

ycfunet.blogspot.com/...usb-sniffer.html - Preview

USB freeware opensource protocol

23 Mar 08

USB 系統應用範例 - ChamberPlus System Level Studio

tw.myblog.yahoo.com/...article - Preview

USB schematics

1 more annotations...
- 如此一來，我的USB Device 就可以在使用上利用USB BUS供電，卻又不需要去處理 PC Host 的
  
  USB Token 的 Request 的干擾，又等到我在系統上需要跟PC 連線時，又可以隨時連接到PC HOST上。
  
  (我指的意思是說 : USB 裝置本身可以自行決定在適當的時機來跟PC HOST 連線,

16 Mar 08

USB Protocol Specification

www.faculty.iu-bremen.de/...usb_protocol.html - Preview

USB protocol

The data sent via the bus are ordered according to Intel's Little Endian
specification, i.e. bytes are written and read from the least significan
bit (LSB) to the most significant bit (MSB).
6 more annotations...
- A zero
  is inserted after every six consecutive ones in the data stream before
  the data is NRZI encoded, to force a transition in the NRZI data
  stream. This gives the receiver logic a data transition at least once
  every seven bit times to guarantee the data and clock lock.
- Start-of-Frame (SOF) packets are issued by the host at a nominal rate
  of once every 1.00 ms ±0.0005 ms for a full-speed bus and 125
  µs ±0.0625 µs for a high-speed bus

USB in a NutShell - Chapter 3 - USB Protocols

www.beyondlogic.org/...usb3.htm - Preview

USB protocol

Data on the USBus is transmitted LSBit first
2 more annotations...
- PID stands for Packet ID
- The SOF packet consisting of an 11-bit frame number is sent by the host every 1ms
  ± 500ns on a full speed bus or every 125 µs
  ± 0.0625 µs on a high speed bus.

15 Mar 08

USB的八個問題和答案

www.ouravr.com/...bbs_content.jsp - Preview

USB

21 Feb 08

USB Mass Storage FAQ

www.lvr.com/mass_storage_faq.htm - Preview

FAQ USB mass storage

For hard drives, flash
drives, and similar devices, PERIPHERAL DEVICE TYPE = 00h (direct access
block device) and VERSION = 04h (SPC-2) or 05h (SPC-3).

08 Nov 07