I've been doing a bunch with 32u4 based arduinos recently (pro
micro/leonardo/ss micro/etc).
With these, there's a bit in the start up to make sure that it doesn't
crash when talking to an uninitialized serial port, something like:
while( !Serial );
Or, you could check it with something like:
if( !Serial ) { return; }
and so on. In any case, it's been my observation that when it's sitting in
these tight loops checking the hardware, the thing is basically running
all-out full speed. Even just the ( Serial.available() ) function in these
situations can be super laggy. Even just putting a delay in there helps a
ton. eg:
while( !Serial ) { delay( 50 ); }
or somesuch.
It might not be the cause of the power drain, but there's a chance it is.
maybe?
In my experience, those calls checking the serial port seemed to block the
system entirely and cause bad behaviors... :/
-s
On Wed, Jan 30, 2019 at 12:34 PM Brian White <[email protected]> wrote:
> I got Jimmy's code working on Teensy 3.5 & 3.6, and on Adafruit Feather
> 32u4 Adalogger
> And modified my copy somewhat. I was playing with getting the top-right
> corner of TS-DOS to display the current working directory, and reducing the
> power drain.
> Some changes are just gratuitous refactoring to suit myself, so that I
> could then make the functional changes.
>
> In this video there is a little mystery where the power drain is a little
> high on initial power-on, but behaves properly as soon as you actually talk
> to the device at least once. I think I figured that out and the current
> version behaves properly right from power-on.
>
> Teensy 3.5/6 and the Adafruit device are quite different and have
> different quirks. I never pulled both versions together into a single
> modular code base yet. I have some messy code to try to make the same code
> handle different devices by configurable options amd macros, but it's not
> really worked out and so it's still two separate branches, one for each
> device.
>
> I haven't done anything further since then.
>
> https://youtu.be/_lFqsHAlLyg
>
> My mods are in the two different branches here. The master branch is
> Jimmy's original code.
> https://github.com/aljex/SD2TPDD
>
> --
> bkw
>
> On Wed, Jan 30, 2019 at 3:52 AM VANDEN BOSSCHE JAN <
> [email protected]> wrote:
>
>> Someone was working on a TPDD emulator on Arduino. Is there any progress?
>> And/Or photos?
>>
>> As I'm starting a course on Arduino programming, I am now even more
>> interested. This could become the cheapest stand-alone TPDD emulator yet.
>>
>>
>> Greetings from the TyRannoSaurus
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>
> --
> bkw
>
--
Scott Lawrence
[email protected]
