Hi,
Can anyone please tell me when the posting of sendTask can fail in
AMStandard? I'm trying to send a series of packets from a MICA2 mote to
another, and it seems that after the first message in the series is
successfully received by the receiver, and the acknowledgement reaches the
sender, but from the second message onwards, the sender fails to send the
packets over the radio. For debugging, I've actually called some display()
function in the following part of code in the implementation of SendMsg.send
in AMStandard.nc:
command result_t SendMsg.send[uint8_t id](uint16_t addr, uint8_t length,
TOS_MsgPtr data) {
long j;
if (!state) {
state = TRUE;
if (length > DATA_LENGTH) {
dbg(DBG_AM, "AM: Send length too long: %i. Fail.\n", (int)length);
state = FALSE;
return FAIL;
}
if (!(post sendTask())) {
dbg(DBG_AM, "AM: post sendTask failed.\n");
call Display.display(0);
for (j=0; j< 50000000;j++);
call Display.display(7);
for (j=0; j< 50000000;j++);
call Display.display(0);
for (j=0; j< 50000000;j++);
state = FALSE;
return FAIL;
}
else {
buffer = data;
data->length = length;
data->addr = addr;
data->type = id;
buffer->group = TOS_AM_GROUP;
dbg(DBG_AM, "Sending message: %hx, %hhx\n\t", addr, id);
dbgPacket(data);
}
return SUCCESS;
}
return FAIL;
}
What is the actual physical interpretation of this?
Thanks in advance
Bibudh Lahiri
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