Slashdot Mirror

← Back to Stories (view on slashdot.org)

USB 2.0 For Linux

Posted by Hemos on from the plug-and-play-away dept.

SilentTone writes: "PCWorld is reporting that USB 2.0 or high speed USB will be hitting Linux first half 2002. Intel is already providing space on its Pentium 4 motherboard for the USB 2.0 controller. With a transfer rate of 480Mbps (more than firewire's 400Mbps) it seems promising." Update: 09/04 23:02 PM GMT by H : So, somewhere between my preview and going live, I seem to have "lost" the link - if you find it, please post below. I'm looking - in the meantime, this is a good Linux and USB tutorial, and Blue Cat Linux is supporting USB 2.0. HA! Found it - story updated.

2 of 255 comments (clear)

  1. mmm by Yablo · · Score: 0, Troll

    mmm, usb 2.0... now if only my devices supported it...

  2. Useless Technology by Bren · · Score: 0, Troll
    How useless is this technology? My keyboard uses USB©

    At 400 Mbps, that is 400/8 = 50 MBps©
    Suppose that one keystroke is translated by the keyboard and sent to the bus as one byte©
    1024 bytes is one megabyte©
    50 megabytes is equal to 51,200 bytes©

    So that is equal to 51,200 keystrokes per second©

    Additionally, say a keyboard can handle a maximum of 5 keys held down at one time, before a key must be released to accept more data©
    That means 5 concurrent keypresses/second = 10,240 ¥5keys/sec
    Say each key press travels a distance of ©5cm downwards, or ©005m downwards©
    Using the equations F=ma and a = d/t, along with the fact that time = 1/10240 seconds per ¥5 keypresses©©©
    The acceleration can be solved such that each ¥5keys must be accelerated at 51©2 m/s

    Then solve for F, we find that each ¥5keys must also have a force of 51©2 Newtons behind it© ¥assuming an average key has a mass of 1g

    Obviously not a practical technology for the likes of me©

    Bren©