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Arduino/hardware/tools/libchip_sam3s/include/async.h

81 lines
2.9 KiB
C

/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* 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:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: 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
* 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.
* ----------------------------------------------------------------------------
*/
/**
* \file
*
* Provide a routine for asynchronous transfer.
*
*/
#ifndef _ASYNC_
#define _ASYNC_
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include <stdint.h>
/*----------------------------------------------------------------------------
* Definition
*----------------------------------------------------------------------------*/
/** Transfer is still pending.*/
#define ASYNC_STATUS_PENDING 0xFF
#ifdef __cplusplus
extern "C" {
#endif
/*----------------------------------------------------------------------------
* Type
*----------------------------------------------------------------------------*/
/** \brief Asynchronous transfer descriptor. */
typedef struct _Async
{
/** Asynchronous transfer status.*/
volatile uint8_t status ;
/** Callback function to invoke when transfer completes or fails.*/
void *callback ;
/** Driver storage area; do not use.*/
uint32_t pStorage[4] ;
} Async ;
/*----------------------------------------------------------------------------
* Global functions
*----------------------------------------------------------------------------*/
extern uint32_t ASYNC_IsFinished( Async* pAsync ) ;
#ifdef __cplusplus
}
#endif
#endif /* #ifndef _ASYNC_ */