Describes the pin idle functions involved in implementing the GPIO interface class.
When a pin is in Idle mode, it is in a third electrical state,
different from High and Low. This state is called DefaultIdleState and does not correspond to the logical state of the pin. A pin should
never be in this state when its direction is input because input pins
are always in Enabled or Disabled mode. (A pin might theoretically
be in DefaultIdleState because it has never been
enabled, but that would be a programming error.) However, when a module
enters the Idle state so do its pins. There are also circumstances
when it is necessary to know the electrical state of an output pin
because it cannot be deduced from the logical state. For this reason
the GPIO interface class specifies functions to get and set the electrical
state of a pin for three values and not two.
Implement SetPinIdleConfigurationAndState() with return value KErrNone.
Return KErrNone
Implement SetPinIdleConfigurationAndState() with return value KErrNotSupported.
Return KErrNotSupported if the pin does not support the idle state.
Implement GetPinIdleConfigurationAndState() with return value KErrNone.
Return KErrNone
Implement GetPinIdleConfigurationAndState() with return value KErrNone.
Return KErrNotSupported if the pin does not support the idle state.