1 /* ----------------------------------------------------------------------------
\r
2 * SAM Software Package License
\r
3 * ----------------------------------------------------------------------------
\r
4 * Copyright (c) 2011, Atmel Corporation
\r
6 * All rights reserved.
\r
8 * Redistribution and use in source and binary forms, with or without
\r
9 * modification, are permitted provided that the following conditions are met:
\r
11 * - Redistributions of source code must retain the above copyright notice,
\r
12 * this list of conditions and the disclaimer below.
\r
14 * Atmel's name may not be used to endorse or promote products derived from
\r
15 * this software without specific prior written permission.
\r
17 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
\r
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
\r
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
\r
20 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
\r
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
\r
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
\r
23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
\r
24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
\r
25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
\r
26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\r
27 * ----------------------------------------------------------------------------
\r
33 /*----------------------------------------------------------------------------
\r
35 *----------------------------------------------------------------------------*/
\r
41 /*----------------------------------------------------------------------------
\r
43 *----------------------------------------------------------------------------*/
\r
45 /** TWI driver is currently busy. */
\r
46 #define TWID_ERROR_BUSY 1
\r
48 /** Transfer is still pending.*/
\r
49 #define ASYNC_STATUS_PENDING 0xFF
\r
54 /*----------------------------------------------------------------------------
\r
56 *----------------------------------------------------------------------------*/
\r
58 /*----------------------------------------------------------------------------
\r
60 *----------------------------------------------------------------------------*/
\r
61 /** \brief Asynchronous transfer descriptor. */
\r
62 typedef struct _Async
\r
64 /** Asynchronous transfer status.*/
\r
65 volatile uint32_t status ;
\r
66 /** Callback function to invoke when transfer completes or fails.*/
\r
68 /** Driver storage area; do not use.*/
\r
69 uint8_t pStorage[9] ;
\r
72 /** \brief TWI driver structure. Holds the internal state of the driver.*/
\r
73 typedef struct _Twid
\r
75 /** Pointer to the underlying TWI peripheral.*/
\r
77 /** Current asynchronous transfer being processed.*/
\r
81 /*----------------------------------------------------------------------------
\r
83 *----------------------------------------------------------------------------*/
\r
84 extern void TWID_Initialize( Twid *pTwid, Twihs *pTwi ) ;
\r
85 extern void TWID_DmaInitialize(Twid *pTwid, Twihs *pTwi);
\r
87 extern void TWID_Handler( Twid *pTwid ) ;
\r
89 extern uint32_t ASYNC_IsFinished( Async* pAsync ) ;
\r
91 extern uint8_t TWID_Read(
\r
100 extern uint8_t TWID_Write(
\r
109 extern uint8_t TWID_DmaRead(
\r
119 extern uint8_t TWID_DmaWrite(
\r
133 #endif //#ifndef TWID_H
\r