How to sync data from to different embedded Device?

[Yash001]

Hello,

I do have two device, Device_A and Device_B. They are emitting signals, ExperimentDCdataArraived
and Experiment NodeBeagging Signals.

ExperimentDCdataArraived is emit on arrival of DC data.
Sample rate is set same in both device, I would like to place both devices data in single csv file.

On emit of ExperimentNodeBeagging signal, new csv file are created. It is mostly emit from Device_A. It is also emit from Device_B but slot are just return without creating new csv file.

I would like to executable slot of ExperimentNodeBeaggingif both device sent same number of data to software. Otherwise wait for Device_B sent the data point.

if (oldData.container.contains(DCDATA_RING_CURRENT)) {
   			auto len1 = oldData.container[DCDATA_RING_CURRENT].numberOfDataPoints();
   			auto len2 = oldData.container[DCDATA_ELAPSED_TIME_S].numberOfDataPoints();

   			while (len1 != len2) {
   				QEventLoop loop;
   				QEventLoop* loopPtr = &loop;

   				QTimer::singleShot(20, loopPtr, SLOT(quit()));
   				loopPtr->exec();
   				len1 = oldData.container[DCDATA_RING_CURRENT].numberOfDataPoints();
   				len2 = oldData.container[DCDATA_ELAPSED_TIME_S].numberOfDataPoints();
   			}
   		}

I place this code in slot of ExperimentNodeBeagging but it is crashing for some sampling rate because loopPtr->exec();

As If I am not wrong then its look like doing something like below

1. emit the ExperimentNodeBeagging.
2. wait for exit code at lootpPtr->exec().
3. emit the ExperimentNodeBeagging.
4. wait for exit code at lootpPtr->exec().
5. get the exit code from step 2
6. execute the remaining Slot of ExperimentNodeBeagging
7. get the exit code from step 4
8. execute the remaining Slot of ExperimentNodeBeagging (Here my Software is crash)

In Normal execution ExperimentNodeBeagging is not emit the second time (step 7 and 8 ). Here Device_A is not getting the response ExperimentNodeBeagging within certain amount of time that's why Device_A again sent signal ExperimentNodeBeagging.

I am calling loopPtr->exec(); because before creating the CSV file I need wait data from Device_B.

Is there any good way to sync both Device?

[SGaist]

Hi,

If you want to have both data before going further, why not store them rather than artificially wait ? Then once you have both write them to the file you want.

[Yash001]

@SGaist I am doing the that thing but the issue is created at last point.

So, Whenever the Device_A send the last data point, and immediately send the ExperimentNodeBeagging, So new csv file created.

Whenever the Device_B send the data point at that time it will place in new csv file instead of old csv file because of ExperimentNodeBeagging.

[SGaist]

Do you really need two different objects to communicate with these devices ?