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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, 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.
* ----------------------------------------------------------------------------
*/
#ifndef TWID_H
#define TWID_H
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include <board.h>
#include <drivers/async/async.h>
//------------------------------------------------------------------------------
// Global definitions
//------------------------------------------------------------------------------
/// TWI driver is currently busy.
#define TWID_ERROR_BUSY 1
/// TWI driver operation timeout.
#define TWID_ERROR_TIMEOUT 2
//------------------------------------------------------------------------------
// Global types
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// TWI driver structure. Holds the internal state of the driver.
//------------------------------------------------------------------------------
typedef struct _Twid {
/// Pointer to the underlying TWI peripheral.
AT91S_TWI *pTwi;
/// Current asynchronous transfer being processed.
Async *pTransfer;
} Twid;
//------------------------------------------------------------------------------
// Global functions
//------------------------------------------------------------------------------
extern void TWID_Initialize(Twid *pTwid, AT91S_TWI *pTwi);
extern void TWID_Handler(Twid *pTwid);
extern unsigned char TWID_Read(
Twid *pTwid,
unsigned char address,
unsigned int iaddress,
unsigned char isize,
unsigned char *pData,
unsigned int num,
Async *pAsync);
extern unsigned char TWID_Write(
Twid *pTwid,
unsigned char address,
unsigned int iaddress,
unsigned char isize,
unsigned char *pData,
unsigned int num,
Async *pAsync);
#endif //#ifndef TWID_H
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