[Coco] Dragon & Drivewire

[Ken H.]

Aaron,
I now have the hardware part of the Dragon Driverwire adapter ready and
it's time to start testing.

The max232 circuit takes care of the signal level shifting.

I think that all we need the Drivewire server to do is to invert (xor) the
data bits coming from the Dragon to the PC.
Outgoing data from the PC to the Dragon should remain intact.

If you could build a test version that takes care of this inversion I'd
like to give it a try.

Thanks,
Ken

On Sat, Oct 13, 2012 at 2:07 PM, Aaron Wolfe <aawolfe at gmail.com> wrote:

>
>
>
> If that means xor the data bits, sure.  We already flip bit order and some
> other things for 230k mode, so there is an existing interface to support
> transformation of the data.  If we also need to change level of start
> bits..hmmm I don't think its possible in software..?  But I'm no serial
> guru.
> If it can be done, happy to do it.
>

On Oct 13, 2012 7:52 AM, "Ken H." <dragon.atv at gmail.com> wrote:
>
> Aaron,
> The Dragon's PA1 Tx line is internally inverted. Phill's Dragon parallel
to
> bitbanger adapter design includes a level shifter and an LS04 to invert
the
> signal again.
> The hardware design could be simplified if it would be possible to have
the
> Drivewire server handle the inversion of the output signal coming from the
> Dragon.
>
> Do you think it would it be possible to add a "Dragon Tx Invert" option to
> the Drivewire server code?
>