Merge pull request #1157 from cleanflight/blackbox-pause

Add pause/resume switch support to Blackbox

docs/Blackbox.md

@@ -230,6 +230,14 @@ After downloading the log, be sure to erase the chip to make it ready for reuse
 If you try to start recording a new flight when the dataflash is already full, Blackbox logging will be disabled and
 nothing will be recorded.
 
+### Usage - Logging switch
+If you're recording to an onboard flash chip, you probably want to disable Blackbox recording when not required in order
+to save storage space. To do this, you can add a Blackbox flight mode to one of your AUX channels on the Configurator's 
+modes tab. Once you've added a mode, Blackbox will only log flight data when the mode is active.
+
+A log header will always be recorded at arming time, even if logging is paused. You can freely pause and resume logging 
+while in flight.
+
 ## Converting logs to CSV or PNG
 After your flights, you'll have a series of flight log files with a .TXT extension. You'll need to decode these with
 the `blackbox_decode` tool to create CSV (comma-separated values) files for analysis, or render them into a series of PNG

docs/Modes.md

@@ -27,6 +27,7 @@ auxillary receiver channels and other events such as failsafe detection.
 | 20      | 19     | TELEMETRY  | Enable telemetry via switch                                          |
 | 21      | 20     | AUTOTUNE   | Autotune Pitch/Roll PIDs                                             |
 | 22      | 21     | SONAR      | Altitude hold mode (sonar sensor only)                               |
+| 26      | 25     | BLACKBOX   | Enable BlackBox logging                                              |
 
 ## Mode details