I hadn't come across v-usb until Tom mentioned it, but it certainly appears
to be well supported. I think I'll probably try and get it running on a Uno
(which I've already got), then scale it down to something more primitive
once it's all working.
I did look at the nano, but it apparently uses a special-purpose FTDI chip
for USB [1], so can't act as a HID. Not sure if that's true for the v3 as
well though - I haven't found a definitive answer online yet.
I did fine this [2] though, which I think might be a good contender - it's
based on the ATmega32U4 (the same as the Leonardo), and appears to be
capable of HID [3].
Will definitely chip in for a couple of Tinys if you're ordering some -
thanks.
Cheers,
Calum
[1] http://forum.arduino.cc/index.php/topic,233994.0.html
[2] http://proto-pic.co.uk/a-star-32u4-micro/
[3] http://www.pololu.com/docs/0J61/6
On 24 July 2014 17:15, Edward Watson m...@edwardwatson.co.uk wrote:
On 24 July 2014 15:07, Calum Chisholm calum.chish...@gmail.com wrote:
All,
Can anyone suggest a suitable microcontroller for simulating a USB
keyboard? Is the Teensy still the way to go for this, or is something like
the Arduino Micro (or similar) a better option these days?
An Ardunio nano v3 might be a good choice if you want to actually make a
full KB with caps lock reporting etc. Apparently V-USB can handle 12 MHz,
12.8 MHz, 15 MHz, 16 MHz, 16.5 MHz, 18 MHz and 20 MHz [1], but the clocks
need to be precise. If you want to roll your sleeves up you could use a
larger i/o attiny such as an 18pin Atiny88/861 [2] + your own SMD board
design. You can always borrow a Nano and have a play with. Also I
am ordering some Atiny88's for the PsionKB-to-Kindle3G interface, so can
get you some also if you were interested.
Cheers,
Ed
[1] http://vusb.wikidot.com/hardware
[2]
http://www.avrfreaks.net/index.php?name=PNphpBB2file=viewtopicp=1089525
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