Hello Community,
as the topic says: Correct way to obtain memory map in a real time bundle.
How can we do this?
Is there a way to use something like this?:
member = std::shared_ptr<comm::datalayer::IMemoryUser>();
DatalayerFactory->openMemory(member , "fieldbuses/ethercat/master/instances/ethercatmaster/realtime_data/output");
member ->getMemoryMap(data);
Or do we need to use readAsync(...)
What's the best practice?
Sincerely Elleshar
Hi,
be aware of the moment when you call:
result = output_led->getMemoryMap(data_led);
When you call this code when the scheduler is still in config-mode, the EtherCat Data may not be valid.
For a quick and dirty workaround you can try to read it in until you get a valid memory map (when your scheduler is running).
do
{
std::this_thread::sleep_for(std::chrono::milliseconds(100));
result = output_led->getMemoryMap(data_led);
} while (comm::datalayer::STATUS_FAILED(result));
But be sure you have deactivated your watchdog before you try this.
Best regards
Nick