usb.c File Reference

usb connection cheching functions More...

#include <stdint.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include "usb.h"

Include dependency graph for usb.c:

Functions
	ISR (INT0_vect)
uint8_t	usb_is_connected (void)
void	usb_init (void)
void	usb_shutdown (void)

Detailed Description

usb connection cheching functions

Function Documentation

ISR()

ISR

(

INT0_vect

)

IRQ wakes up when PC/usb connect or disconnect.

usb_init()

void usb_init

(

void

)

enable irq int0

usb_is_connected()

uint8_t usb_is_connected

(

void

)

check if usb port is connected.

usb_shutdown()

void usb_shutdown

(

void

)

disable INT0 irq