EmbeddedSystems/EmbeddedSystemsTHM/main.c

/*
 * EmbeddedSystemProject.c
 *
 * Created: 21/10/2021 16:55:21
 * Author : n0x
 */ 

#include "Led.h"
#include "Taster.h"
#include "Timer.h"
#include <avr/interrupt.h>
#define F_CPU 1000000
#include <util/delay.h>

/* function declarations */
void buttonTest (void);
void task1 (void);
void task2 (void);
void task3 (void);

/* enums */
enum{
	S1_GREEN, S1_YELLOW, S1_RED, S1_RED_YELLOW,
	S2_GREEN, S2_YELLOW, S2_RED, S2_RED_YELLOW,
	INIT,
} StoplightState = INIT; /* Emus for the stoplight task (task 3) */

/* global variables */
volatile int g_counter = 0;
int g_ledStatus = 0;
uint16_t g_startMS;

/* functions */
int 
main (void)
{ 
	sei();
	
	/* Initialize the LEDs and Buttons */
	Led_init();
	Taster_init();
	Timer_init();
	
	g_startMS=Timer_getTick();
	
    while (1) 
    {
		//buttonTest();
		//task1();	
		//task2();
		task3();
    }
}

void 
buttonTest (void) 
{
	Taster1_get() ? Led1_On() : Led1_Off();
	Taster2_get() ? Led2_On() : Led2_Off();
	Taster3_get() ? Led3_On() : Led3_Off();
	Taster4_get() ? Led4_On() : Led4_Off();
}

/* Task 1 (2021-10-21)  */
void
task1 (void)
{
	_delay_ms(100);
		
	/* Programmieren Sie ein Lauflicht. Nutzen Sie dazu die in „Led.h“ deklarierten
	* Funktionen.
	* 2.Schreiben Sie ein Programm mit folgenden Funktionen:
	* Wenn Taste 1 gedrückt wird, wird die Variable „Counter“ inkrementiert.
	* Wird Taste 2 gedrückt wird, wird die Variable „Counter“ dekrementiert.
	* Variable „Counter“ soll sich dabei zwischen 0 und 8 bewegen.
	* Der Inhalt des Wertes soll mit Hilfe der LEDs angezeigt werden.
	* 0 = keine LED an, 1 = LED1 an, 2 = LED1+LED2 an, usw.
	* 8 = alle LEDs an.
	*/
		
	/* Check if counter needs to be incremented */
	if (Taster1_get()) g_counter++;

	/* Check if counter needs to be decremented */
	if (Taster2_get()) g_counter--;

	/* Keep counter within boundaries (0-8) */
	g_counter = (g_counter + 9) % 9;
		
	/* Set the LEDs according to the counter */
	g_counter >= 1 ? Led1_On() : Led1_Off();
	g_counter >= 2 ? Led2_On() : Led2_Off();
	g_counter >= 3 ? Led3_On() : Led3_Off();
	g_counter >= 4 ? Led4_On() : Led4_Off();
	g_counter >= 5 ? Led5_On() : Led5_Off();
	g_counter >= 6 ? Led6_On() : Led6_Off();
	g_counter >= 7 ? Led7_On() : Led7_Off();
	g_counter >= 8 ? Led8_On() : Led8_Off();
}

/* Task 2 (2021-10-28)  */
void
task2 (void)
{
	if(Timer_getTick() - g_startMS >= 1000) { /* Wait 1000ms before switching LED1 */
		g_startMS=Timer_getTick();
		
		if(g_ledStatus % 2 == 0){
			Led1_On();
			} else {
			Led1_Off();
		}
		g_ledStatus++;
	}
}


/* Task 3 */
void 
task3 (void)
{
	/* Programmieren eine Ampelsteuerung auf einer Straßenkreuzung */
	
	/*
	int delayShort = 5000;
	int delayLong  = 30000;
	//*/
	int delayShort = 2500;
	int delayLong  = 7500;
	
	/* Stoplight and the corresponding Leds
	      |  GREEN  |  YELLOW  | RED
	----------------------------------
	SL 1  |  Led1   |  Led4    | Led6
	SL 2  |  Led2   |  Led5    | Led7
	*/
	switch(StoplightState){
		case INIT:
			Led1_On(); // Set stoplight 1 to green
			Led2_Off();
			Led3_Off();
			Led4_Off();
			Led5_Off();
			Led6_Off();
			Led7_On(); // Set stoplight 2 to red
			Led8_Off(); 
			StoplightState = S1_YELLOW;
		
		case S1_YELLOW: // Set stoplight 2 to yellow
			_delay_ms(delayLong);
			Led1_Off();
			Led4_On(); 
			StoplightState = S1_RED;
		
		case S1_RED: // Set stoplight 2 to red
			_delay_ms(delayShort);	
			Led4_Off();
			Led6_On(); 
			StoplightState = S2_RED_YELLOW;
		
		case S2_RED_YELLOW:
			_delay_ms(delayShort);
			Led5_On();
			Led7_On();
			StoplightState = S2_GREEN;
			
		case S2_GREEN:
			_delay_ms(delayShort);
			Led5_Off();
			Led7_Off();
			Led2_On();
			StoplightState = S2_YELLOW;
			
		case S2_YELLOW:
			_delay_ms(delayLong);
			Led2_Off();
			Led5_On();
			StoplightState = S2_RED;
		
		case S2_RED:
			_delay_ms(delayShort);
			Led5_Off();
			Led7_On();
			StoplightState = S1_RED_YELLOW;
		
		case S1_RED_YELLOW:
			_delay_ms(delayShort);
			Led4_On();
			Led6_On();
			StoplightState = S1_GREEN;
			
		case S1_GREEN:
			_delay_ms(delayShort);
			Led4_Off();
			Led6_Off();
			Led1_On();
			StoplightState = S1_YELLOW;
			
	}
}