Minimum pin consuming LCD display

gistfile1.ino

void commandProcessor(void) {
	int lastCounts;
	int counts;
	boolean firstCount = true;
	if (Encoder.buttonDown()) { // Read push button status (Ground true => 0=down)
		while (Encoder.buttonDown()); // Do  nothing while button is depressed
		// Display menu
		LCD.printString(MSG_FCT_SELECT, 1);
		counts = 0;
		Encoder.setCounter(counts, 0, 3);
		firstCount = true;
		while (!Encoder.buttonDown()) { // While button is not depressed
			lastCounts = counts;
			counts = Encoder.getCounter(); // Get counter value	
			if ((lastCounts != counts) || firstCount) { // If counter has changed since last display
				firstCount = false;
				LCD.printString(FunctionIndexToString(counts), 2);
			}
		}
		while (Encoder.buttonDown());  // Wait button release
		switch(counts) {
		// Run control		
		case 0: 
			LCD.printString(MSG_FCT_RUN_CONTROL, 1);
			counts = 0;
			Encoder.setCounter(counts, 0, 1);
			firstCount = true;
			while (!Encoder.buttonDown()) { // While button is not depressed
				lastCounts = counts;
				counts = Encoder.getCounter(); // Get counter value
				if ((lastCounts != counts) || firstCount)  { // If counter has changed since last display
					firstCount = false;
					LCD.printString(RunControlIndexToString(counts), 2);
				}
			}
			while (Encoder.buttonDown())  // Do  nothing while button is depressed
			run_state = counts;
			break;
		// Function: cycle duration
		case 1: 
			LCD.printString(MSG_FCT_DURATION, 1);
			counts = tim_cycleDuration;
			Encoder.setCounter(counts, 100, 10000);
			firstCount = true;
			while (!Encoder.buttonDown()) { // While button is not depressed
				lastCounts = counts;
				counts = Encoder.getCounter(); // Get counter value
				if ((lastCounts != counts) || firstCount) { // If counter has changed since last display
					firstCount = false;
					counts = lastCounts + pow((counts - lastCounts), 3); // Non linear counter (counts booster): Powering to 3 prevents from caring about the sign
					Encoder.setCounter(counts); // Update counter
					// Display frequency
					LCD.eraseBuffer();
					LCD.insertInteger(counts, 5);
					LCD.insertString("ms", 7, true);
					LCD.printBuffer(2);
				}
				delay(50);	
			}
			while (Encoder.buttonDown()); // Wait for button release			
			tim_cycleDuration = counts;
			computeDurations();
			break;
		// Function: on/off ratio
		case 2: 
			LCD.printString(MSG_FCT_ON__OFF_RATIO, 1);
			counts = tim_onOffRatio;
			Encoder.setCounter(counts, 1, 99);
			firstCount = true;
			while (!Encoder.buttonDown()) { // While button is not depressed
				lastCounts = counts;
				counts = Encoder.getCounter(); // Get counter value
				if ((lastCounts != counts) || firstCount) { // If counter has changed since last display
					firstCount = false;
					Encoder.setCounter(counts); // Update counter
					// Display frequency
					LCD.eraseBuffer();
					LCD.insertInteger(counts, 5);
					LCD.insertString("%", 7, true);
					LCD.printBuffer(2);
				}	
			}
			while (Encoder.buttonDown()); // Wait for button release			
			tim_onOffRatio = counts;
			computeDurations();
			break;
		// Exit
		case 3: 
			break;
		}		
		LCD.printString(MSG_FIRMWARE, 1);
		LCD.printString("                ", 2);
	}
}