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// L�sung zu Termin2
// Aufgabe 4
// Namen: __________; ___________
// Matr.: __________; ___________
// vom : __________
//
#include "../mi2/h/pio.h"
#include "../mi2/h/pmc.h"
#include "../mi2/h/aic.h"
StructPMC* myPMC = PMC_BASE;
StructAIC* myAIC = AIC_BASE;
StructPIO* myPIOB = PIOB_BASE;
void taste_irq_handler (void) __attribute__ ((interrupt));
void taste_irq_handler (void)
{
volatile int keyPressed = myPIOB->PIO_ISR;
if (!(keyPressed & KEY1))
myPIOB->PIO_SODR = LED1;
//if (!(myPIOB->PIO_PDSR & KEY2))
if (!(keyPressed & KEY2))
myPIOB->PIO_CODR = LED1;
myAIC->AIC_EOICR = 0x01; // write something to register
// to signal end of Interrupt Service Routine
}
int main(void)
{
myAIC->AIC_EOICR = myPIOB->PIO_ISR;
// disable all interrupt sources of pio
myPIOB->PIO_IDR = 0xFFFFFFFF;
// Initialize PIOB
myPIOB->PIO_PER = KEY1|KEY2|LED1; // Enable PIO for SW1,SW2,LED1,LED2
//myPIOB->PIO_OER = LED1|LED2; // Set LED1 and LED2 as output
myPIOB->PIO_OER = LED1; // Set LED1 and LED2 as output
myPIOB->PIO_CODR = LED1; // Clear Output Data Register
// Enable Interrupts in CPU
// done by OS
// disable PIOB Interrupt in AIC
myAIC->AIC_IDCR = (1<<PIOB_ID);
// Enable Interrupt for PIOB in AIC
myAIC->AIC_SMR[PIOB_ID] = AIC_SRCTYPE_EXT_LOW_LEVEL; // which register? what to put in it? 0x1 for low
myAIC->AIC_SVR[PIOB_ID] = (volatile unsigned int)&taste_irq_handler; // Address of Interrupt handling routine...
// enable PIOB Interrupt in AIC
myAIC->AIC_IECR = (1<<PIOB_ID); // Enable Interrupt for PIOB
// enable PIOB Interrupt
myPIOB->PIO_IER = KEY1|KEY2; // what to put here?
myPMC->PMC_PCER = (1<<PIOB_ID); // Clock PIO B
// loop to infinity
while(1)
{
}
return 0;
}
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