[Tinyos Core WG] Meeting: September 27

[Joe Polastre]

This requires requiring the known responses (the values of the enum)
and (imho) is prone to programmer error.

-Joe

On 9/27/06, Martin Turon <mturon at xbow.com> wrote:
>
>
>
>
> What was the reaction to my suggestion of combining these into one command:
>
>     GeneralIO.getState()
>
>  returns an enum of possible states: GPIO_INPUT, GPIO_OUTPUT, ...
>
>  Then all about the GPIO pin can be gleaned from one call.
>
>  Martin
>
>
>
>  -----Original Message-----
>  From: tinyos-2.0wg-bounces at Mail.Millennium.Berkeley.EDU on
> behalf of Jonathan Hui
>  Sent: Tue 9/26/2006 11:09 PM
>  To: Joe Polastre
>  Cc: TinyOS Core WG; Philip Levis
>  Subject: Re: [Tinyos Core WG] Meeting: September 27
>
>
>  Okay. Makes sense to have both. So for the TEP, it suffices to say that
>  if it's neither input or output then the pin is in some other MCU
>  defined state. Whether it be a hardware limitation or it is configured
>  to function with some module, etc.
>
>  --
>  Jonathan Hui
>  jhui at archrock.com
>
>  Joe Polastre wrote:
>  > Not all I/O's have the capability of being both input and output.
>  > Just because the pin is not input does not mean it is output, and vice
>  > versa.  If my pin is an ADC (and configured as such using something
>  > like ADC.bindPort by another module in the system), such as on the
>  > MSP430, and I call "isInput()" and it returns false, what does that
>  > mean?  The pin is NOT output!
>  >
>  > Furthermore, if I care about whether a pin is output, writing a
>  > statement like:
>  > if (!call GeneralIO.isInput()) {
>  >  //
>  > }
>  > is not a natural method or intuitive of programming.
>  >
>  >
>  >
>  > -Joe
>  >
>  > On 9/26/06, Jonathan Hui <jhui at archrock.com> wrote:
>  >>
>  >> Is this to support cases where a pin is set to neither an input or
>  >> output? e.g. module-func? It's easy to add. But how do you set it to
>  >> something other than input or output? Is this microcontroller specific?
>  >>
>  >> --
>  >> Jonathan Hui
>  >> jhui at archrock.com
>  >>
>  >> Joe Polastre wrote:
>  >> > Please add isOutput() in addition to isInput().
>  >> >
>  >> > On 9/26/06, Jonathan Hui <jhui at archrock.com> wrote:
>  >> >>
>  >> >> Checked in to the devel branch.
>  >> >>
>  >> >> --
>  >> >> Jonathan Hui
>  >> >> jhui at archrock.com
>  >> >>
>  >> >> Philip Levis wrote:
>  >> >> > On Sep 26, 2006, at 9:54 PM, Jonathan Hui wrote:
>  >> >> >
>  >> >> >>
>  >> >> >> Updated TEP117.
>  >> >> >>
>  >> >> >> - added UART
>  >> >> >> - updated interfaces to match tinyos-2.x (though SpiByte still
>  >> returns
>  >> >> >> error_t in the code).
>  >> >> >> - added isInput() to GeneralIO.
>  >> >> >>
>  >> >> >> Is there something else that we agreed to update before looking
>  >> at it
>  >> >> >> again?
>  >> >> >>
>  >> >> >
>  >> >> > I don't see it in the repository.
>  >> >> >
>  >> >> > Phil
>  >> >> >
>  >> >> _______________________________________________
>  >> >> Tinyos-2.0wg mailing list
>  >> >> Tinyos-2.0wg at Mail.Millennium.Berkeley.EDU
>  >> >>
>  >>
> https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-2.0wg
>  >>
>  >> >>
>  >> >>
>  >> >
>  >>
>  >
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