Hello all ,
I am having some problems understanding how the OscilloscopeRF works so i
need someone to give me help with these problems...
first of all , in the StdControl.init() method i dont understand what this
line means >>
dbg(DBG_BOOT, "OSCOPE initialized\n");
return SUCCESS;
Second , i don't understand the use of timer ... it is alwayz the case that
in the RF communication modules there exists timer i don't really get the
reason why ?
Third , I don't understand how this works and what is its meaning? :
------------------------------
---------------------------------------------------------------------------
task void dataTask() {
struct OscopeMsg *pack;
atomic {
pack = (struct OscopeMsg *)msg[currentMsg].data;
packetReadingNumber = 0;
pack->lastSampleNumber = readingNumber;
}
pack->channel = 1;
pack->sourceMoteID = TOS_LOCAL_ADDRESS;
/* Try to send the packet. Note that this will return
* failure immediately if the packet could not be queued for
* transmission.
*/
if (call DataMsg.send(TOS_BCAST_ADDR, sizeof(struct OscopeMsg),
&msg[currentMsg]))
{
atomic {
currentMsg ^= 0x1;
}
call Leds.yellowToggle();
}
}
async event result_t ADC.dataReady(uint16_t data) {
struct OscopeMsg *pack;
atomic {
pack = (struct OscopeMsg *)msg[currentMsg].data;
pack->data[packetReadingNumber++] = data;
readingNumber++;
dbg(DBG_USR1, "data_event\n");
if (packetReadingNumber == BUFFER_SIZE) {
post dataTask();
}
}
if (data > 0x0300)
call Leds.redOn();
else
call Leds.redOff();
return SUCCESS;
}
-------------------------------------------------------------------------------------
thanks for reading my post , and please help .
Hossam.
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