Hi all:
Now i'am using mts300 with micaz motes.I want to use Microphone on mts300.But i
found the sample rate was too slow. Even if i set sample interval to
500ms,error occured when call read() provided by MicC component.
In MicP component i saw code below:
command error_t SplitControl.start()
{
call AlertInterrupt.disable();
call MicPower.makeOutput();
call MicPower.set();
call MicMuxSel.makeOutput();
call MicMuxSel.clr();
call MicSetting.muxSel(1); // Set the mux so that raw microhpone output is
selected
call MicSetting.gainAdjust(64); // Set the gain of the microphone.
call Timer.startOneShot(1200);
return SUCCESS;
}
event void Timer.fired() {
signal SplitControl.startDone(SUCCESS);
}
If i change "call Timer.startOneSHot(1200);" to"call Timer.startOneSHot(10);"
and set sample interval to 10ms, read() returns successfully,but data doesn't
seem to be correct .I looked up in the mialing list and found someone said the
microphone need a "warmup "time just like above .If i can only read one
microphone sample per second i think it's meaningless.
There is a MicReadStreamP , can this component solve my problem?
It would be appreciated if anyone could help !
2008-07-24
付巍
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