randomtest.ini

// randomTest(); simulateCarMotor();

SIGNAL void randomTest() 
{
	int pos;
	int i, j;
	int lastPulsePinValue;
	int reached1, reached2, reached3;
	int requested1, requested2, requested3; // 1 if a call has been made to this floor
	int at_floor;
	
	// Random variables
	int randButton, initFeed, random, count, delay;
	
	reached1 = 0;
	reached2 = 0;
	reached3 = 0;
	requested1 = 0;
	requested2 = 0;
	requested3 = 0;
	pos = 0;
	count = 0;
	at_floor = 0;
	
	// Initially feed the random variable
	initFeed =  rand(0xAB21);
	printf("initFeed: %d\n", initFeed);
	random = rand(initFeed);

	printf("randomTest() is running\n");
	while(1) // run forever
	{
		// Get a random value at every iteration depending on counter
		random = rand(count + random);	// counter's number is arbitary (because we're starting with random delay)
		delay = random % 5; // 0 to 5 sec (maximum) delay
		
		// call from random floor
		randButton = rand(count + random) % 3;	
		PORTC |= 1 << randButton;
		
		// register that a call to this floor has been made
		if(randButton == 0)
			requested1 = 1;
		else if(randButton == 1)
			requested2 = 1;
		else
			requested3 = 1;
		
		// close the doors
		PORTC |= 1 << 8;
		
		swatch(0.0025);
		// reset the pin (button)
		PORTC ^= 1 << randButton;
		
		
		// delay for the generated amount of time
		while(j < delay) 
			j++;
		j = 0;
		at_floor = 0;
		 // every second, check whether we are at a floor
		if ((PORTC & (1 << 7)) && !TIM3_CCR1 && !TIM3_CCR2) 
		{
		  if (pos >= -1 && pos <= 1 && !reached1) {
			// reached floor 1
			printf("arrived at floor 1\n");
			reached1 = 1;
			if(!requested1)
				printf("Unnecessary stop!\n");
			requested1 = 0; // served
			at_floor = 1;
		  }
		  if (pos >= 399 && pos <= 401 && !reached2) {
			// reached floor 2
			printf("arrived at floor 2\n");
			reached2 = 1;
			if(!requested2)
				printf("Unnecessary stop!\n");
			requested2 = 0; // served
			at_floor = 1;
		  }
		  if (pos >= 799 && pos <= 801 && !reached3) {
			// reached floor 3
			printf("arrived at floor 3\n");
			reached3 = 1;
			if(!requested3)
				printf("Unnecessary stop!\n");
			requested3 = 0; // served
			at_floor = 1;
		  }
		}
		
							
		if (TIM3_CCR1 || TIM3_CCR2) // if the elevator is moving, nothing has been reached
		{
			reached1 = 0;
			reached2 = 0;
			reached3 = 0;
		}

		// if we have stopped at a floor, we open the doors for 1s
		if (at_floor)
		  PORTC ^= 1 << 8;

		// wait 1s
		for (i = 0; i < 400; ++i) {
		  if (lastPulsePinValue < (PORTC & (1 << 9)))
			pos += TIM3_CCR1 ? 1 : -1;
		  lastPulsePinValue = PORTC & (1 << 9);
		  swatch(0.0025);
		}

		// close the doors
		PORTC |= 1 << 8;
		
		count++; // increment the counter. Used as rand() feed. Overflow of this counter is desired (more random values)
	}
}