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/* ---------------------------------------------------------------------------- */
/* Atmel Microcontroller Software Support */
/* SAM Software Package License */
/* ---------------------------------------------------------------------------- */
/* Copyright (c) 2015, Atmel Corporation */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following condition is 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_
#define _TWID_
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "chip.h"
#include <stdint.h>
/*----------------------------------------------------------------------------
* Definition
*----------------------------------------------------------------------------*/
/** TWI driver is currently busy. */
#define TWID_ERROR_BUSY 1
/** Transfer is still pending.*/
#define ASYNC_STATUS_PENDING 0xFF
#ifdef __cplusplus
extern "C" {
#endif
/*----------------------------------------------------------------------------
* Types
*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
* Type
*----------------------------------------------------------------------------*/
/** \brief Asynchronous transfer descriptor. */
typedef struct _Async {
/** Asynchronous transfer status.*/
volatile uint32_t status;
/** Callback function to invoke when transfer completes or fails.*/
void *callback;
/** Driver storage area; do not use.*/
uint8_t pStorage[9];
} Async;
/** \brief TWI driver structure. Holds the internal state of the driver.*/
typedef struct _Twid {
/** Pointer to the underlying TWI peripheral.*/
Twihs *pTwi;
/** Current asynchronous transfer being processed.*/
Async *pTransfer;
} Twid;
/** \brief TWI driver structure. Holds the internal state of the driver.*/
typedef struct {
uint8_t Twi_id;
/** Pointer to the underlying TWI driver.*/
Twid *pTwid;
/** Pointer to the underlying DMA driver for TWI.*/
sXdmad *pTwiDma;
} TwihsDma;
/*----------------------------------------------------------------------------
* Export functions
*----------------------------------------------------------------------------*/
extern void TWID_Initialize(Twid *pTwid, Twihs *pTwi);
extern void TWID_DmaInitialize(TwihsDma *pTwidma, Twihs *pTwi,
uint8_t bPolling);
extern void TWID_Handler(Twid *pTwid);
extern uint32_t ASYNC_IsFinished(Async *pAsync);
extern uint8_t TWID_Read(
Twid *pTwid,
uint8_t address,
uint32_t iaddress,
uint8_t isize,
uint8_t *pData,
uint32_t num,
Async *pAsync);
extern uint8_t TWID_Write(
Twid *pTwid,
uint8_t address,
uint32_t iaddress,
uint8_t isize,
uint8_t *pData,
uint32_t num,
Async *pAsync);
extern uint8_t TWID_DmaRead(
TwihsDma *pTwiXdma,
uint8_t address,
uint32_t iaddress,
uint8_t isize,
uint8_t *pData,
uint32_t num,
Async *pAsync);
extern uint8_t TWID_DmaWrite(
TwihsDma *pTwiXdma,
uint8_t address,
uint32_t iaddress,
uint8_t isize,
uint8_t *pData,
uint32_t num,
Async *pAsync);
#ifdef __cplusplus
}
#endif
#endif //#ifndef TWID_H
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