RSSI and concurrent S.Bus output handling
S.BUS output disable cleanup
Merge branch 'master' of github.com:PX4/Firmware into rssi
Hotfix: Prevent failures in boot handling due to missing microSD card logfile - we are not depending on the microSD any more completely
Merge branch 'master' into rssi
Enable the PX4IO self check and debug interfaces. No reason to disable them, since they are runtime-configured (and needed, for the case of memory)
Make startup less chatty
Build fix, replaced usleep with up_udelay in memory lockdown state
Cleanup wording in rcS
Do not make PX4IO start mandatory for forceupdate
Clear the screen more properly.
Fix the initialisation and operation of the PX4IO ADC - now RSSI and VSERVO voltages should be read correctly.
Last small fixes to IO driver to support updates with and without switch pressed and with and without px4io start call before the forceupdate call
Fixes to memory check handling, split out switch handling to allow separate initialization
Merge branch 'rssi' of github.com:PX4/Firmware into rssi
Make SBUS switching conditional to be friendly to IO v1
Fixed PPM warning to be only printed with PPM inputs enabled
Replace mission_item_triplet with position_setpoint_triplet, WIP
Merge pull request #598 from PX4/rssi

RSSI and concurrent S.Bus output handling
Added tune on IO upgrade error