How to wait for a signal?

Archiver

Dear Freinds, Hi

I just registered in this group and this is my first message.
In my program I have to wait 30sec and if non of the input pins give
stamp a command, I should finish the program and turn of a relay.

I am not sure if there is a special command for these situations?
I am using a for-loop to check all the inputs each 100ms.

Please let me know if you have better suggestion.

Thank You Nima

Archiver

you should download/print out the basic stamp manual from
parallax.com's download section. This is in there, but anyway:
serin 1,16428,2000,NoData,[noparse][[/noparse]dec mydata]
debug "got the data!",cr
stop
NoData:
debug "didn't get data within 2 seconds!",cr

you can change the 2000 number to reflect different times to wait for
data before stopping the wait.



--- In basicstamps@yahoogroups.com, "NIMA" <nimjah@y...> wrote:
> Dear Freinds, Hi
>
> I just registered in this group and this is my first message.
> In my program I have to wait 30sec and if non of the input pins
give
> stamp a command, I should finish the program and turn of a relay.
>
> I am not sure if there is a special command for these situations?
> I am using a for-loop to check all the inputs each 100ms.
>
> Please let me know if you have better suggestion.
>
> Thank You Nima

Archiver

thank you so much

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Archiver

The solution given assumes you are waiting for a
232-type signal on each of the input pins -- is that
the case?

If you're looking for a level change (0 to 5V or
5V to 0) then the given solution won't work for you.

Also, you can only 'look' for a 232 type signal one
pin at a time, since (as you should be aware) the BS2 is
a single-tasking beast. This means it can only accept
232 signals on the pin it is listening to at the time.

There IS a 'timeout' parameter used in the example --
but that just gives the 'sender' a window to send data
in before it monitors the next pin.

--- In basicstamps@yahoogroups.com, "NIMA" <nimjah@y...> wrote:
> Dear Freinds, Hi
>
> I just registered in this group and this is my first message.
> In my program I have to wait 30sec and if non of the input pins
give
> stamp a command, I should finish the program and turn of a relay.
>
> I am not sure if there is a special command for these situations?
> I am using a for-loop to check all the inputs each 100ms.
>
> Please let me know if you have better suggestion.
>
> Thank You Nima