Re: UART Best Practices?

[Kevin Miller]

Based upon your suggestions, I made a demo that I plan to use as a basis 
for my next project. Comments/suggestions welcome. It is here: 
https://github.com/ksmiller99/HelloIOIOUart

On Wednesday, October 5, 2016 at 5:52:25 PM UTC-4, Kevin Miller wrote:
>
> I'm connecting a IOIO to a hobbyist robot which also has a UART. I plan to 
> use the IOIOService because there will be other sensors attached to the 
> IOIO by UART and I want to be able to handle I/O in a timely manner. Is 
> there a full, simple example of using a UART (or 2) in a service? I have 
> several questions:
>
> 1. If there is a temporary loss of connection, say a Bluetooth hiccup, 
> what disconnected() do with the UARTs? There may be data in the buffers, 
> will it be lost? Will the uart created by openUart() be 
> destroyed/undefined? Should the setup() skip openUart() if it was opened in 
> a previous setup()?
>
> Thanks,
> Kevin
>

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Re: UART Best Practices?

[Ytai Ben-Tsvi]

Hey, see inline.

On Wed, Oct 5, 2016 at 2:52 PM, Kevin Miller  wrote:

> I'm connecting a IOIO to a hobbyist robot which also has a UART. I plan to
> use the IOIOService because there will be other sensors attached to the
> IOIO by UART and I want to be able to handle I/O in a timely manner. Is
> there a full, simple example of using a UART (or 2) in a service?
>

Not that I'm aware of, but there's not much to it. If you look at the
HelloIOIOService example app together with the UART JavaDocs and/or wiki
page, you should be able to get going fairly easily (at least as far as
using the UART).


> I have several questions:
>
> 1. If there is a temporary loss of connection, say a Bluetooth hiccup,
> what disconnected() do with the UARTs? There may be data in the buffers,
> will it be lost? Will the uart created by openUart() be destroyed/undefined?
>

Upon disconnect, the IOIO instance and all the interfaces created from it
(Uart included) become invalid. If there's any unread data it will be lost.


> Should the setup() skip openUart() if it was opened in a previous setup()?
>

No. The next setup() gets a fresh instance of the IOIO, that is, it start
from a clean state again.


>
> Thanks,
> Kevin
>
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