Faster way to detect when a card disconnects

[dimpolo]

Is ther a faster way to detect when a card disconnects other than continuously calling pn532.read_passive_target() until it times out?
_COMMAND_INLISTPASSIVETARGET can be rather slow to respond (sometimes >100ms).

I tried this:
pn532.call_function(_COMMAND_GETGENERALSTATUS, 8)

It reports the number of targets connected, but it doesn't update until I run some other target command.
Does someone know if there's a different command for this?

[dimpolo]

I found a way:

pn532.call_function(_COMMAND_INDESELECT, 1, [1])
pn532.call_function(_COMMAND_INSELECT, 1, [1])

Feel free to close this.
Feel free to add a check_if_target_still_there method