usb_dual.h File Reference

SAM USB Dual Role driver header file.

Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.

#include "compiler.h"
#include "preprocessor.h"
#include "conf_board.h"
#include "board.h"
#include "extint.h"
#include "port.h"

Macros
USB ID pin management
The ID pin come from the USB connector (A and B receptable) and allows to select the USB mode between host or device. The ID pin can be managed through EIC pin. This feature is optional, and it is enabled if USB_ID_PIN is defined in board.h and CONF_BOARD_USB_ID_DETECT defined in conf_board.h.
#define	USB_ID_DETECT   (defined(CONF_BOARD_USB_ID_DETECT))
#define	USB_ID_EIC   (defined(USB_ID_PIN) && USB_ID_DETECT)
USB Vbus management
The VBus line can be monitored through a EIC pin and a basic resistor voltage divider. This feature is optional, and it is enabled if USB_VBUS_PIN is defined in board.h and CONF_BOARD_USB_VBUS_DETECT defined in conf_board.h.
#define	USB_VBUS_DETECT   (defined(CONF_BOARD_USB_VBUS_DETECT))
#define	USB_VBUS_EIC   (defined(USB_VBUS_PIN) && USB_VBUS_DETECT)

Functions
void	usb_dual_disable (void)
	Deinitialize the dual role driver. More...
bool	usb_dual_enable (void)
	Initialize the USB peripheral and set right role according to ID pin. More...