[Tinyos-help] Alarm32khz32C produces some warnings

Greg Hackmann gwh2 at cse.wustl.edu
Mon Feb 9 07:45:42 PST 2009

Ittipong Khemapech wrote:
>     *1st: called asynchronously*
>     Payload.getPayload called asynchronously from DataSendAlarm.fired
>     AMSend.send called asynchronously from DataSendAlarm.fired

You should read Section 4.5 of the TinyOS Programming Guide
(http://www.tinyos.net/tinyos-2.x/doc/pdf/tinyos-programming.pdf) if it
isn't clear why you're getting this warning.

The simplest fix is to move all of your computations from
DataSendAlarm.fired() into a task.  Then handle the
DataSendAlarm.fired() event by posting that task.  Or, you could use
TinyOS's built-in AlarmToTimerC component to transform the Alarm
interface into a Timer interface.

Greg Hackmann

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