Hi,
The cc2420 radio only takes a few microseconds to
start, more details can be found in the cc2420
datasheet.
Looking at the code below I would suggest moving your
AMSend.send call to the RadioControl.startDone event.
Your send is currently being called before the radio
is started...
Tony
--- margherita errichiello <[EMAIL PROTECTED]>
wrote:
> Hi to all, I'm a student working of my bachelor
> thesis.
> During some experimentation oriented to power
> consuption extimation I
> noticed that it seems that the CC2420 Radio of our
> telosB motes need 5
> seconds to turn it self on.
> As a result, if I use a transmit rate exceding than
> one packet each 5
> seconds. I am unable to switch off the radio.
> Power consuption is not less than 40 mV.
> As of your knowledge : Is this result correct? Can I
> shorten the
> switch time in any way?
> You can find the snippet code below.
>
> module MyComponent
> { uses
> { interface Boot;
> interface SplitControl as RadioControl;
> interface AMSend;
> interface Timer;
> }
> }
> implementation
> { typedef nx_struct oscilloscope
> { nx_uint16_t version;
> nx_uint16_t interval;
> nx_uint16_t id;
> nx_uint16_t count;
> nx_uint16_t readings[10];
> } oscilloscope_t;
> message_t sendbuf;
> oscilloscope_t local;
> event void Boot.booted ( )
> { call Timer.startPeriodic (10000);
> }
> event void RadioControl.startDone (error_t error) {
> }
> event void RadioControl.stopDone (error_t error) { }
> event void Timer.fired ( )
> { call RadioControl.start ( );
> call AMSend.send (AM_BROADCAST_ADDR, &sendbuf,
> sizeof local);
> }
> event void AMSend.sendDone (message_t* msg, error_t
> error)
> { call RadioControl.stop ( );
> }
> }
>
>
> Thanks for your reply, Margherita.
> _______________________________________________
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>
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>
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