// Lösung zu Termin2
// Aufgabe 4
// Namen: __________; ___________
// Matr.: __________; ___________
// vom :  __________
//
#include "pio.h"
#include "pmc.h"
#include "aic.h"

StructPMC* myPMC = PMC_BASE;
StructAIC* myAIC = AIC_BASE;
StructPIO* myPIOB = PIOB_BASE;

void taste_irq_handler (void) __interrupt__ ((interrupt));

void taste_irq_handler (void)
{
	// do the things here
	
	// necessary??
	//myPIOB->PIO_ISR;											// Read Interrupt Status Register to enable
																				// Interrupt again
																				
	// switch LED1

	myAIC->AIC_EOICR = 0x00000000; 				// Write to End of Interrupt Command Register  
																				// to signal end of Interrupt Service Routine
}

int main(void)
{	
	myPMC->PMC_PCER = 0x14; 								// Clock PIO B
	
	// Initialize PIOB
	myPIOB->PIO_PER = KEY1|KEY2|LED1|LED2;  // Enable PIO for SW1,SW2,LED1,LED2
	myPIOB->PIO_OER = LED1|LED2;						// Set LED1 and LED2 as output
	myPIOB->PIO_CODR = 0x000000FF;					// Clear Output Data Register
	
	// Enable Interrupts in CPU
	// done by OS
	
	// Enable Interrupt for PIOB in AIC
	//myAIC->AIC_SMR[] = ;								 // which register? what to put in it?
	//myAIC->AIC_SVR[]= taste_irq_handler  // Address of Interrupt handling routine...
	
	myAIC->AIC_IECR	= PIOB_ID;							// Enable Interrupt for PIOB
	
	// enable PIOB Interrupt
	//myPIOB->PIO_IER  = ; 									// what to put here? 
	
	// loop to infinity
	while(1)
	{
	}
	
	return 0;
}