[57north-discuss] Microcontroller for simulating a USB HID

[Edward Watson]

Aww so close.  Yea, Micro is the way to go.

Cheers,
Ed

On 25 July 2014 15:45, Calum Chisholm <calum.chisholm at gmail.com> wrote:

> Hmm... too few I/O pins if I have to do that - the nano only has 14 pins,
> and I need 13 for inputs. I suppose I could add a shift-register, but it's
> all getting a bit hacky by that point.
>
> It's beginning to look like the ATmega32U4 is my best bet.
>
> Cheers,
> Calum
>
>
>
> On 24 July 2014 19:37, Edward Watson <mail at edwardwatson.co.uk> wrote:
>
>> On 24 July 2014 17:46, Calum Chisholm <calum.chisholm at gmail.com> wrote:
>>
>>> 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.
>>>
>> Ah sure - you would only be using the Nano's FTDI USB chip for uploading
>> the code. The V-USB device itself would use your assigned I/O pins together
>> with a specific arrangement of diodes to mimic the USB tx/rx pins, with the
>> USB hosts V+ and GND pins powering the Nano's power rails.  Pretty sure it
>> would work fine.
>>
>> Cheers,
>> Ed
>>
>
>
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