LCDService.pseudo

/***Service module that implements a state machine for writing individual characters and commands to LCD***/

initialize module level variables

/**************************************************************
Function: InitLCDService
Takes: 8 bit integer (priority number)
Returns: true or false
Purpose: Stores priority number of this service inside the module and puts state machine into initial pseudo-state.
/*************************************************************/
InitLCDService
	Store priority number in a statis variable
	Put us into the initial pseudo-state to set up for the initial transition
	Set up the short timer for inter-command timings
	Post the initial transition event
end	

/**************************************************************
Function: PostLCDService
Takes: ES_Event
Returns: true or false
Purpose: Posts ES_Event to LCDService queue.
/*************************************************************/
PostLCDService
	call ES_PostToService with stored priority number
end

/**************************************************************
Function: RunLCDService
Takes: ES_Event
Returns: ES_Event (ES_NO_EVENT)
Purpose: Runs the LCDService state machine.
/*************************************************************/
RunLCDService
  use a switch case to change between states
    case InitPState :
		if event type is ES_INIT
			Initialize the necessary Tiva pins
			Increment initialization counter
			Start the timer for max short timer delay
			move to the Initializing state
		endif
		break;
    case Initializing :
      if event type is a short timeout
		Take appropriate initialization step, then set short timer to delay
		Increment initialization counter
		break;
    case Waiting2Write : 
		if event type is ES_LCD_PUTCHAR
			Write character to LCD
			Start the inter-character timer (Inter char delay = 53 us)
			Move to the PausingBetweenWrites state		
		else if event type is ES_LCD_COMMAND
			Write command to LCD
			Start the inter-command timer
			Move to the PausingBetweenWrites state
		else if event type is LCD_RESET
			Move to initializing state
			Reset initialization counter to 1
			Delay 4500 us before taking first initialization step
		break;
    case PausingBetweenWrites :
		if event type is a short timeout
			Move to Waiting2Write state
		else if event type is LCD_RESET
			Move to initializing state
			Reset initialization counter to 1
			Delay 4500 us before taking first initialization step
		break;
	end switch case
	// Return ES_NO_EVENT
end