doc: Add forward reference from 'idle' description to idle entry steps.

This provides a reminder that entering idle mode takes specific steps
which differ between models.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/doc/usage.inc b/doc/usage.inc
index 29587b7e7e4f4afc3d16f3af307a8bddbdd849d2..d010f398e76d926559dc5eb398217f074b0b88f3 100644 (file)
--- a/doc/usage.inc
+++ b/doc/usage.inc
@@ -238,14 +238,16 @@
                ifdef::radio[disabled, and the radio goes into transmit-only mode.]
                ifndef::radio[disabled.]
                The only way to get out of this
-               mode is to power the flight computer down.
+               mode is to power the flight computer down. See below for how to get the flight
+               computer to come up in Flight/Pad mode at power on.
 
                Idle::
                The flight computer is ready to communicate over USB
                ifdef::radio[and in packet mode over the radio.]
                You can configure
                the flight computer, download data or display
-               the current state.
+               the current state. See below for how to get the flight
+               computer to come up in Idle mode at power on.
 
                ifdef::telemetrum,easymega,telemega[]
                For flight computers with accelerometers (TeleMetrum,