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???
02/01/08 21:41
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#150180 - unnecessary is in the eye of the beholder
Responding to: ???'s previous message
Jan Waclawek said:
Andy Peters said:
There's nothing wrong with using USB on a backplane or motherboard, and in fact it makes a lot of sense for things like keyboards and mice.

I don't share this view.

USB is unnecessarily complicated for a task where a simple serial protocol would more than suffice.

It only makes sense in a world where complicated albeit potentially (and also really) buggy drivers for complex USB devices are more readily available than say a simple I2C device driver.


Oh, come on, Jan, you're being silly.

USB drivers for keyboards and mice are certainly standard and after ten years, debugged. If they use the same keyboard interface chip that's used in a standard external USB keyboard, one can also be assured that it, too, works.

Using USB instead of, say, I2C, means that NO host software or drivers has to be written.

-a




List of 33 messages in thread
TopicAuthorDate
Interfacing a touchpad to 8051, is possible?            01/01/70 00:00      
   USB            01/01/70 00:00      
      Drivers            01/01/70 00:00      
         it might be whatever            01/01/70 00:00      
   USB or PS/2 - unlikely?            01/01/70 00:00      
      USB/PS2 likely            01/01/70 00:00      
      USB -- likely            01/01/70 00:00      
         I don't think so...            01/01/70 00:00      
            unnecessary is in the eye of the beholder            01/01/70 00:00      
               OK then what\'s the gain of the added complexity?            01/01/70 00:00      
                  driver driver driver driver!            01/01/70 00:00      
                     in my friend's laptop is usb            01/01/70 00:00      
                        so it's broken?            01/01/70 00:00      
                     I didn't say I don't understand, why...            01/01/70 00:00      
                        Anyone know ?            01/01/70 00:00      
                           Do you mean something like this...            01/01/70 00:00      
                           Look into a parts keyboard            01/01/70 00:00      
            true, but you forget the most important thing            01/01/70 00:00      
               More important thing is... Cost            01/01/70 00:00      
      Yes and Yes            01/01/70 00:00      
   ALPS GlidePoint            01/01/70 00:00      
      It is very similar, but not the same            01/01/70 00:00      
         CIRQUE touchpad            01/01/70 00:00      
            Picture:            01/01/70 00:00      
   YEAH, it is PS/2            01/01/70 00:00      
   Help with datasheet            01/01/70 00:00      
      is it ABLE to do that?            01/01/70 00:00      
         I agree...            01/01/70 00:00      
            this is the point!            01/01/70 00:00      
               Alps GlidePoint driver on PC            01/01/70 00:00      
                  Tested alps driver...            01/01/70 00:00      
                     PS/2 sniffer            01/01/70 00:00      
                        Bus Hound is paid...            01/01/70 00:00      

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