* GearMotor
* This controls the DC gear motor that opens the sarcophagus door.

define: MOTOR_OPEN_TIME 2400 // gear motor opening run time [ms]
define: MOTOR_CLOSE_TIME 100 // gear motor closing run time [ms]

Module data:
MyPriority; // module-level variable for the GearMotor module's priority

* Initializes the GearMotor service.
* uint8_t priority: priority of the GearMotor service

InitializeGearMotor
	Param: priority
	Return: bool, true unless the initialization failed

		1) post the initial transition event of type ES_INIT with the priority value
		2) if the initialization event posted correctly
			return true
		    else
			return false
end InitializeGearMotor


* Runs the GearMotor service.
* CurrentEvent: the current event that has occurred

RunGearMotor
	Param: CurrentEvent
	Return: ES_Event called ES_NO_EVENT; // assume no problems will occur
  
	1) decide what the gear motor should do based on the Event Type
		if the event type is DoorOpen
			call the openDir function to set the motor to rotate in the opening direction.
			start the GEAR_MOTOR_TIMER with the parameter MOTOR_OPEN_TIME determine duration

		if the event type is DoorClose
			call the closeDir function to set the motor to rotate in the opening direction.
			start the GEAR_MOTOR_TIMER with the parameter MOTOR_CLOSE_TIME determine duration

		if the event type is ES_TIMEOUT:
			if the timer that expired is the Gear Motor timer
				call the brake function to stop the motor
		end if

	2) return ReturnEvent;
end RunGearMotor


* Posts events to the GearMotor service.
* ThisEvent: event to post to GearMotor servce
* return true if successfully posted; false otherwise

PostGearMotor
	Param: ThisEvent, event to post to GearMotor service
  	Return  bool, true if successfully posted; false otherwise

  		1) return ES_PostToService(MyPriority, ThisEvent)

end PostGearMotor


* Sets the motor to rotate in the opening direction. Private function.

openDir
takes no parameters, returns nothing
	Set pin1 on the gear motor high
	Set pin2 on the gear motor low
end openDir


* Sets the motor to rotate in the closing direction. Private function.

closeDir
takes no parameters, returns nothing
	Set pin1 on the gear motor low
	Set pin2 on the gear motor high
end closeDir


* Stops the motor. Private function.
takes no parameters, returns nothing

brake
	Set both pin1 and pin2 on the gear motor high to stop rotation
end brake