1 | //main.c
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2 |
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3 | #include <AT91SAM7X256.H>
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4 | #include "AT91SAM7X-EK.h"
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5 |
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6 | #define INTTAST = AT91B_SW1;
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7 |
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8 | void ex_int_handler (void){
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9 | volatile unsigned int dummy;
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10 | dummy = AT91C_BASE_PIOA->PIO_ISR;
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11 | AT91C_BASE_AIC->AIC_EOICR=AT91C_BASE_TC0->TC_SR;
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12 | AT91C_BASE_AIC->AIC_ICCR=(1<<AT91C_ID_TC0);
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13 | *AT91C_AIC_EOICR=0;
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14 | AT91C_BASE_PIOB->PIO_CODR=AT91B_LED1;// LED1 hier zum Int.-Test anmachen
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15 | AT91C_BASE_AIC->AIC_EOICR = 0;
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16 | }
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17 |
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18 | int main(void){
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19 | int io_status;
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20 | // Enable the Clock of the PIO
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21 | AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOA;
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22 | AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOB;
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23 | AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SYS;
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24 |
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25 | // Configure the PIO Lines corresponding to LED1..LED4 as Outputs
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26 | AT91C_BASE_PIOB->PIO_PER = AT91B_LED_MASK;
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27 | AT91C_BASE_PIOB->PIO_OER = AT91B_LED_MASK;
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28 |
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29 | // Clear the LED's. On the Board we must apply a "1" to turn off LEDs
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30 | AT91C_BASE_PIOB->PIO_SODR = AT91B_LED_MASK;
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31 |
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32 | //Init Interrupt
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33 | AT91C_BASE_PIOA->PIO_PER=AT91B_SW1;
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34 | AT91C_BASE_PIOA->PIO_ODR =AT91B_SW1;
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35 | AT91C_BASE_PIOA->PIO_CODR=AT91B_SW1;
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36 | AT91C_BASE_PIOA->PIO_PPUER=AT91B_SW1;
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37 | AT91C_BASE_PIOA->PIO_ASR=AT91B_SW1;
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38 | AT91C_BASE_PIOA->PIO_OWDR=AT91B_SW1;
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39 | AT91C_BASE_AIC->AIC_SMR[AT91C_ID_PIOA]=AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE | 0;
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40 | AT91C_BASE_AIC->AIC_SVR[AT91C_ID_PIOA]=(unsigned int)ex_int_handler;
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41 | AT91C_BASE_PIOA->PIO_IFER=AT91B_SW1;
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42 | io_status = AT91C_BASE_PIOA->PIO_ISR;
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43 | AT91C_BASE_AIC->AIC_IECR=(1 << AT91C_ID_PIOA);
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44 | AT91C_BASE_AIC->AIC_ISCR=(1 << AT91C_ID_PIOA); //Test
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45 | AT91C_BASE_AIC->AIC_ICCR=0;
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46 | AT91C_BASE_PIOA->PIO_IER=AT91B_SW1;
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47 |
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48 | for(;;){
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49 | if ((AT91C_BASE_PIOA->PIO_PDSR & AT91B_SW3) == 0) { /* Check if SW3 is pressed */
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50 | AT91C_BASE_PIOB->PIO_CODR = AT91B_LED2; /* Turn On LED2 */
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51 | }
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52 | if ((AT91C_BASE_PIOA->PIO_PDSR & AT91B_SW4) == 0) { /* Check if SW4 is pressed */
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53 | AT91C_BASE_PIOB->PIO_SODR = AT91B_LED2; /* Turn Off LED2 */
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54 | }
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55 | }
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56 | }
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