Roberto,
Here is the code that exhibits the problem. You can see the logPrintf(..) calls that generated the data in my previous post.
I can post the "simple" test app but it does not exhibit the problem.
Let me know what you think.
Thanks,
Kirk
TStat getAccLogSamples( TStreamControl * pSc, unsigned int numSamplesToGet, short int * * pSampleBlock, double timeoutSecs )
{
TStat status = STS_OK;
double timeOutTime;
time_t currentTime;
int i;
// this do while is not really a loop. It is used so the code can exit usging a break statement at any point if there is a function that returns status
// notice the break; at the bottom just above the while(1)
do
{
getAccLogElapsedTime = 0.0;
getAccLogStartTime = Timer();
// the caller specifies how long to wait before it gives up
timeOutTime = Timer() + timeoutSecs;
pSc->totalSamplesToSave = numSamplesToGet;
// figure out how many blocks to transfer
if( (numSamplesToGet % NUM_ACCEL_SAMPLES_PER_XFER) == 0 )
{
// if it goes in evenly
pSc->totalStreamBlocksToTransfer = numSamplesToGet / NUM_ACCEL_SAMPLES_PER_XFER;
}
else
{
// to make sure at least the required number are transferred have to add one block
pSc->totalStreamBlocksToTransfer = (numSamplesToGet / NUM_ACCEL_SAMPLES_PER_XFER) + 1;
}
// start the data moving
status = startStreamAccLog( pSc );
if( status ) break;
// initialize the timer that paces the polling so it doesn't happen too often
accLogPollTimeNow = Timer();
accLogPollNextPollTime = accLogPollTimeNow + ACCLOG_POLL_INTERVAL_SEC;
// **** this is the while loop that times out prematurely when the timer jumps by 2^32
// wait for the sample to complete
while( pSc->streamingActiveFlag )
{
// is it time to poll the streaming data?
accLogPollTimeNow = Timer();
if( accLogPollTimeNow >= accLogPollNextPollTime )
{
// yes, advance the poll time
accLogPollNextPollTime = accLogPollTimeNow + ACCLOG_POLL_INTERVAL_SEC;
// keep the data moving while waiting for the block to complete
status = pollStreamAccLog( &streamControlAccLog );
if( status )
{
// attempt to shut it down
stopStreamAccLog( &streamControlAccLog, 1.0 );
break;
}
}
// debug log print when timer jumps
getAccLogTimeNow = Timer();
if( (getAccLogTimeNow - getAccLogTimePrevious) > 10000.0 )
{
// here is where it recognizes the jump in the return from Timer()
logPrintf( "getAccLogTimeNow = %f\n", getAccLogTimeNow );
logPrintf( "getAccLogTimePrevious = %f\n", getAccLogTimePrevious );
logPrintf( "getAccLogDelta Now - Previous = %f\n", getAccLogTimeNow - getAccLogTimePrevious );
// the timer did the "skip up by 2^32 thing so reset it and keep going
timeOutTime = getAccLogTimeNow + timeoutSecs;
}
getAccLogTimePrevious = getAccLogTimeNow;
// timeout if it waits too long (this is the "real" timeout)
if( getAccLogTimeNow > timeOutTime )
{
status = STS_WAIT_ACCLOG_SAMPLES_TIMEOUT;
// go clear the protocol and wait long enough for any extraneous data to come in
stopStreamAccLog( &streamControlAccLog, 1.0 );
break;
}
}
if( status ) break;
// give the caller the pointer to the samples in malloc'ed RAM
*pSampleBlock = pAccLogSamps;
// if it falls through here, then everything was successful
break;
}
while(1);
return( status );
}
