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cacomantis / arch / at90usb128 / modules / usb / device_chap9 / usb_device_task.h

/**
 * @file
 *
 * @brief This file contains the function declarations for USB device task
 *
 * - Compiler:           IAR EWAVR and GNU GCC for AVR
 * - Supported devices:  AT90USB1287, AT90USB1286, AT90USB647, AT90USB646
 *
 * @author               Atmel Corporation: http://www.atmel.com \n
 *                       Support and FAQ: http://support.atmel.no/
 *
 */

/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name of Atmel may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * 4. This software may only be redistributed and used in connection with an Atmel
 * AVR product.
 *
 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE EXPRESSLY AND
 * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _USB_DEVICE_TASK_H_
#define _USB_DEVICE_TASK_H_

/**
 * @defgroup usb_device_task USB device task
 * @{
 */

//_____ I N C L U D E S ________________________________________________________


//_____ M A C R O S ____________________________________________________________


//_____ D E C L A R A T I O N S ____________________________________________


/**
 * Public : (bit) usb_suspended
 * usb_suspended is set to true when USB is in suspend mode
 * usb_suspended is set to false otherwise
 */
extern bool usb_suspended;

/**
 * @brief Definitions of B-Device states
 */
#define B_IDLE              0
#define B_SRP_INIT          1
#define B_PERIPHERAL        2
#define B_WAIT_ACON         3
#define B_HOST              4
#define B_END_HNP_SUSPEND   5

/**
 * @brief OTG B-Device SRP protocole specific states or events
 */
extern uint8_t otg_device_sessions;
extern uint8_t otg_b_device_state;
extern uint8_t sof_seen_in_session;

/// Is the current session a result of a SRP ?
#define Start_session_with_srp()          (otg_device_sessions |= 0x01)
#define End_session_with_srp()            (otg_device_sessions &= ~0x01)
#define Is_session_started_with_srp()     (((otg_device_sessions&0x01) != 0) ? true : false)

/// Has a SRP been sent, and waiting for an answer
#define Srp_sent_and_waiting_answer()     (otg_device_sessions |= 0x02)
#define Ack_srp_sent_and_answer()         (otg_device_sessions &= ~0x02)
#define Is_srp_sent_and_waiting_answer()  (((otg_device_sessions&0x02) != 0) ? true : false)

/**
 * Is the Tb_Srp counter enabled ? Cleared by timer if Tb_Srp_Fail elapsed
 * Tb_Srp_Fail must be between 5 and 6 sec. With an interrupt routine executed
 * each 2ms, its value becomes 2500 (used:5.2sec)
 */
#define TB_SRP_FAIL_MIN       0x0A28
extern uint16_t otg_tb_srp_cpt;
#define Init_tb_srp_counter()             (otg_tb_srp_cpt = 0)
#define Is_tb_srp_counter_overflow()      ((otg_tb_srp_cpt > TB_SRP_FAIL_MIN) ? true : false)

void usb_device_task_init( void );

void usb_start_device( void );

void usb_device_task( void );

///@}

#endif /* _USB_DEVICE_TASK_H_ */