Control and features for satellite positioning system receivers

A method of communicating between subsystems within a satellite positioning receiver enabled device comprising:

• associating a first set of bits in a semaphore with a first subsystems within the satellite positioning receiver;
• associating a second set of bits in the semaphore with a second subsystem operating in parallel with the first subsystem for computing a location of the receiver;
• and
• wherein parallel operations performed by the first subsystem and the second subsystem are synchronized using the semaphore of bits to compute the location of the receiver.

A non-transitory computer readable medium having machine-readable instructions stored thereon for communicating between subsystems within a satellite positioning receiver, the medium comprising:

• instructions for associating a first set of bits in a semaphore with a first subsystems within the satellite positioning receiver;
• instructions for associating a second set of bits in the semaphore with a second subsystem operating in parallel with the first subsystem for computing a location of the receiver;
• and
• wherein parallel operations performed by the first subsystem and the second subsystem are synchronized using the semaphore of bits to compute the location of the receiver.