136 lines
5.3 KiB
C
136 lines
5.3 KiB
C
/* This file has been prepared for Doxygen automatic documentation generation.*/
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/*! \file *********************************************************************
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*
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* \brief XMEGA TWI slave driver header file.
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*
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* This file contains the function prototypes and enumerator definitions
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* for various configuration parameters for the XMEGA TWI slave driver.
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*
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* The driver is not intended for size and/or speed critical code, since
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* most functions are just a few lines of code, and the function call
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* overhead would decrease code performance. The driver is intended for
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* rapid prototyping and documentation purposes for getting started with
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* the XMEGA TWI slave module.
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*
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* For size and/or speed critical code, it is recommended to copy the
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* function contents directly into your application instead of making
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* a function call.
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*
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* \par Application note:
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* AVR1307: Using the XMEGA TWI
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*
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* \par Documentation
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* For comprehensive code documentation, supported compilers, compiler
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* settings and supported devices see readme.html
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*
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* \author
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* Atmel Corporation: http://www.atmel.com \n
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* Support email: avr@atmel.com
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*
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* $Revision: 1569 $
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* $Date: 2008-04-22 13:03:43 +0200 (ti, 22 apr 2008) $ \n
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*
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* Copyright (c) 2008, Atmel Corporation All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of ATMEL may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
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* SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#ifndef TWI_DRIVER_H
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#define TWI_DRIVER_H
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#include "avr_compiler.h"
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/* Transaction status defines.*/
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#define TWIS_STATUS_READY 0
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#define TWIS_STATUS_BUSY 1
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/* Transaction result enumeration */
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typedef enum TWIS_RESULT_enum {
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TWIS_RESULT_UNKNOWN = (0x00<<0),
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TWIS_RESULT_OK = (0x01<<0),
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TWIS_RESULT_BUFFER_OVERFLOW = (0x02<<0),
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TWIS_RESULT_TRANSMIT_COLLISION = (0x03<<0),
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TWIS_RESULT_BUS_ERROR = (0x04<<0),
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TWIS_RESULT_FAIL = (0x05<<0),
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TWIS_RESULT_ABORTED = (0x06<<0),
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} TWIS_RESULT_t;
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struct TWI_Slave;
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typedef void (*TWI_SlaveProc)(struct TWI_Slave*);
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/*! \brief TWI slave driver struct.
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*
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* TWI slave struct. Holds pointer to TWI module and data processing routine,
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* buffers and necessary varibles.
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*/
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typedef struct TWI_Slave {
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TWI_t *interface; /*!< Pointer to what interface to use*/
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TWI_SlaveProc Process_Data; /*!< Pointer to process data function*/
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uint8_t *recvData;
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uint8_t const *sendData; /*!< Data to write*/
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uint8_t bytesMaxRecv;
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uint8_t bytesToSend; /*!< Number of bytes to send */
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uint8_t bytesReceived; /*!< Number of bytes received*/
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uint8_t bytesSent; /*!< Number of bytes sent*/
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uint8_t status; /*!< Status of transaction*/
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uint8_t result; /*!< Result of transaction*/
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bool abort; /*!< Strobe to abort*/
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} TWI_Slave_t;
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void TWI_SlaveInitializeDriver(TWI_Slave_t *twi,
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TWI_t *module,
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TWI_SlaveProc processDataFunction);
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void TWI_SlaveInitializeModule(TWI_Slave_t *twi,
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uint8_t address,
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TWI_SLAVE_INTLVL_t intLevel,
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uint8_t *recvData,
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uint8_t bytesMaxRecv );
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void TWI_SlaveInterruptHandler(TWI_Slave_t *twi);
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void TWI_SlaveAddressMatchHandler(TWI_Slave_t *twi);
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void TWI_SlaveStopHandler(TWI_Slave_t *twi);
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void TWI_SlaveDataHandler(TWI_Slave_t *twi);
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void TWI_SlaveReadHandler(TWI_Slave_t *twi);
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void TWI_SlaveWriteHandler(TWI_Slave_t *twi);
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void TWI_SlaveTransactionFinished(TWI_Slave_t *twi, uint8_t result);
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/*! TWI slave interrupt service routine.
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*
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* Interrupt service routine for the TWI slave. Copy the interrupt vector
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* into your code if needed.
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*
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ISR(TWIC_TWIS_vect)
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{
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TWI_SlaveInterruptHandler(&twiSlaveC);
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}
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*
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*/
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#endif /* TWI_DRIVER_H */
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