JSON Download Crash

[Modellfan]

I can reproduce crashes of JSON Download with the original can base very reliable.

Conditions:

• CAN Mapping is saved in flash
• Auto reload is activated

A) The the Node ID is entered directly triggering a serial get and then the json download. The reload is triggering a can map get after arround 10 json packages transfered.
B) Reset CAN Pins triggering a serial get and then the json download. Normaly runs through. For very long downloads, after some time the resetting the CAN Connection page is closed and then some time later we are again at scenario A.

I am currently testing a fix for this that inhibits any can map polling during downloads.

[jsphuebner]

This should be fixed in d4a1387

[Modellfan]

#23

I think Pulling this fix still makes sense. As it protects the SDO communication on a lower level