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+/* This file has been prepared for Doxygen automatic documentation generation.*/

+/*! \file *********************************************************************

+ *

+ * \brief  XMEGA TWI slave driver header file.

+ *

+ *      This file contains the function prototypes and enumerator definitions

+ *      for various configuration parameters for the XMEGA TWI slave driver.

+ *

+ *      The driver is not intended for size and/or speed critical code, since

+ *      most functions are just a few lines of code, and the function call

+ *      overhead would decrease code performance. The driver is intended for

+ *      rapid prototyping and documentation purposes for getting started with

+ *      the XMEGA TWI slave module.

+ *

+ *      For size and/or speed critical code, it is recommended to copy the

+ *      function contents directly into your application instead of making

+ *      a function call.

+ *

+ * \par Application note:

+ *      AVR1307: Using the XMEGA TWI

+ *

+ * \par Documentation

+ *      For comprehensive code documentation, supported compilers, compiler

+ *      settings and supported devices see readme.html

+ *

+ * \author

+ *      Atmel Corporation: http://www.atmel.com \n

+ *      Support email: avr@atmel.com

+ *

+ * $Revision: 1569 $

+ * $Date: 2008-04-22 13:03:43 +0200 (ti, 22 apr 2008) $  \n

+ *

+ * 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:

+ *

+ * 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.

+ *

+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED

+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 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 TWI_DRIVER_H

+#define TWI_DRIVER_H

+

+#include "avr_compiler.h"

+

+

+/* Transaction status defines.*/

+#define TWIS_STATUS_READY                0

+#define TWIS_STATUS_BUSY                 1

+

+/* Transaction result enumeration */

+typedef enum TWIS_RESULT_enum {

+	TWIS_RESULT_UNKNOWN            = (0x00<<0),

+	TWIS_RESULT_OK                 = (0x01<<0),

+	TWIS_RESULT_BUFFER_OVERFLOW    = (0x02<<0),

+	TWIS_RESULT_TRANSMIT_COLLISION = (0x03<<0),

+	TWIS_RESULT_BUS_ERROR          = (0x04<<0),

+	TWIS_RESULT_FAIL               = (0x05<<0),

+	TWIS_RESULT_ABORTED            = (0x06<<0),

+} TWIS_RESULT_t;

+

+/* Buffer size defines. */

+#define TWIS_RECEIVE_BUFFER_SIZE         8

+#define TWIS_SEND_BUFFER_SIZE            8

+

+

+

+/*! \brief TWI slave driver struct.

+ *

+ *  TWI slave struct. Holds pointer to TWI module and data processing routine,

+ *  buffers and necessary varibles.

+ */

+typedef struct TWI_Slave {

+	TWI_t *interface;                               /*!< Pointer to what interface to use*/

+	void (*Process_Data) (void);                    /*!< Pointer to process data function*/

+	register8_t receivedData[TWIS_RECEIVE_BUFFER_SIZE]; /*!< Read data*/

+	register8_t sendData[TWIS_SEND_BUFFER_SIZE];        /*!< Data to write*/

+	register8_t bytesReceived;                          /*!< Number of bytes received*/

+	register8_t bytesSent;                              /*!< Number of bytes sent*/

+	register8_t status;                                 /*!< Status of transaction*/

+	register8_t result;                                 /*!< Result of transaction*/

+	bool abort;                                     /*!< Strobe to abort*/

+} TWI_Slave_t;

+

+

+

+void TWI_SlaveInitializeDriver(TWI_Slave_t *twi,

+                               TWI_t *module,

+                               void (*processDataFunction) (void));

+

+void TWI_SlaveInitializeModule(TWI_Slave_t *twi,

+                               uint8_t address,

+                               TWI_SLAVE_INTLVL_t intLevel);

+

+void TWI_SlaveInterruptHandler(TWI_Slave_t *twi);

+void TWI_SlaveAddressMatchHandler(TWI_Slave_t *twi);

+void TWI_SlaveStopHandler(TWI_Slave_t *twi);

+void TWI_SlaveDataHandler(TWI_Slave_t *twi);

+void TWI_SlaveReadHandler(TWI_Slave_t *twi);

+void TWI_SlaveWriteHandler(TWI_Slave_t *twi);

+void TWI_SlaveTransactionFinished(TWI_Slave_t *twi, uint8_t result);

+

+

+/*! TWI slave interrupt service routine.

+ *

+ *  Interrupt service routine for the TWI slave. Copy the interrupt vector

+ *  into your code if needed.

+ *

+     ISR(TWIC_TWIS_vect)

+    {

+      TWI_SlaveInterruptHandler(&twiSlaveC);

+    }

+ *

+ */

+

+

+#endif /* TWI_DRIVER_H */