main_2.c

#include <asf.h>
#include <board.h>
#include <gpio.h>
#include <sysclk.h>
#include "busy_delay.h"

#define CONFIG_USART_IF (AVR32_USART2)

// defines for BRTT interface
#define TEST_A      AVR32_PIN_PA31
#define RESPONSE_A  AVR32_PIN_PA30
#define TEST_B      AVR32_PIN_PA29
#define RESPONSE_B  AVR32_PIN_PA28
#define TEST_C      AVR32_PIN_PA27
#define RESPONSE_C  AVR32_PIN_PB00


__attribute__((__interrupt__)) static void interrupt_J3(void);

void init(){
    sysclk_init();
    board_init();
    busy_delay_init(BOARD_OSC0_HZ);
    
    gpio_configure_pin(TEST_A, (GPIO_DIR_INPUT | GPIO_PULL_UP));
    gpio_configure_pin(RESPONSE_A, (GPIO_DIR_OUTPUT | GPIO_PULL_UP));
    
    gpio_configure_pin(TEST_B, (GPIO_DIR_INPUT | GPIO_PULL_UP));
    gpio_configure_pin(RESPONSE_B, (GPIO_DIR_OUTPUT | GPIO_PULL_UP));
     
    gpio_configure_pin(TEST_C, (GPIO_DIR_INPUT | GPIO_PULL_UP));
    gpio_configure_pin(RESPONSE_C, (GPIO_DIR_OUTPUT | GPIO_PULL_UP));
		
    cpu_irq_disable();

    INTC_init_interrupts();
    INTC_register_interrupt(&interrupt_J3, AVR32_GPIO_IRQ_3, AVR32_INTC_INT1);

    cpu_irq_enable();
    stdio_usb_init(&CONFIG_USART_IF);

    #if defined(__GNUC__) && defined(__AVR32__)
        setbuf(stdout, NULL);
        setbuf(stdin,  NULL);
    #endif
}

__attribute__((__interrupt__)) static void interrupt_J3(void)
{
	
}


int main (void){
    init();
    while(1){
		if(gpio_get_pin_value(TEST_A) != 1)
		{
			gpio_set_pin_low(RESPONSE_A);
			busy_delay_us(5);
			gpio_set_pin_high(RESPONSE_A);
		}
		
		if(gpio_get_pin_value(TEST_B) != 1)
		{
			gpio_set_pin_low(RESPONSE_B);
			busy_delay_us(5);
			gpio_set_pin_high(RESPONSE_B);
		}
				
		if(gpio_get_pin_value(TEST_C) != 1)
		{
			gpio_set_pin_low(RESPONSE_C);
			busy_delay_us(5);
			gpio_set_pin_high(RESPONSE_C);
		}
    }
}