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114 lines
3.8 KiB
C
114 lines
3.8 KiB
C
/* ----------------------------------------------------------------------------
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* SAM Software Package License
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* ----------------------------------------------------------------------------
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* Copyright (c) 2011-2012, Atmel Corporation
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*
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* 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 condition is met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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/**
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* \file
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*
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* Interface for configuration the Two Wire Interface (TWI) peripheral.
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*
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*/
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#ifndef _TWI_
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#define _TWI_
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/*------------------------------------------------------------------------------
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* Headers
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*------------------------------------------------------------------------------*/
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#include "../chip.h"
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#include <stdint.h>
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/*----------------------------------------------------------------------------
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* Macros
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*----------------------------------------------------------------------------*/
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/* Returns 1 if the TXRDY bit (ready to transmit data) is set in the given status register value.*/
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#define TWI_STATUS_TXRDY(status) (((status) & TWI_SR_TXRDY) == TWI_SR_TXRDY)
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/* Returns 1 if the RXRDY bit (ready to receive data) is set in the given status register value.*/
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#define TWI_STATUS_RXRDY(status) (((status) & TWI_SR_RXRDY) == TWI_SR_RXRDY)
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/* Returns 1 if the TXCOMP bit (transfer complete) is set in the given status register value.*/
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#define TWI_STATUS_TXCOMP(status) (((status) & TWI_SR_TXCOMP) == TWI_SR_TXCOMP)
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*----------------------------------------------------------------------------
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* External function
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*----------------------------------------------------------------------------*/
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extern void TWI_ConfigureMaster(Twi *pTwi, uint32_t twck, uint32_t mck);
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extern void TWI_SetClock( Twi *pTwi, uint32_t dwTwCk, uint32_t dwMCk );
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extern void TWI_ConfigureSlave(Twi *pTwi, uint8_t slaveAddress);
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extern void TWI_Stop(Twi *pTwi);
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extern void TWI_StartRead(
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Twi *pTwi,
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uint8_t address,
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uint32_t iaddress,
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uint8_t isize);
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extern uint8_t TWI_ReadByte(Twi *pTwi);
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extern void TWI_WriteByte(Twi *pTwi, uint8_t byte);
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extern void TWI_StartWrite(
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Twi *pTwi,
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uint8_t address,
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uint32_t iaddress,
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uint8_t isize,
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uint8_t byte);
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extern uint8_t TWI_ByteReceived(Twi *pTwi);
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extern uint8_t TWI_ByteSent(Twi *pTwi);
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extern uint8_t TWI_TransferComplete(Twi *pTwi);
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extern void TWI_EnableIt(Twi *pTwi, uint32_t sources);
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extern void TWI_DisableIt(Twi *pTwi, uint32_t sources);
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extern uint32_t TWI_GetStatus(Twi *pTwi);
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extern uint32_t TWI_GetMaskedStatus(Twi *pTwi);
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extern void TWI_SendSTOPCondition(Twi *pTwi);
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#ifdef __cplusplus
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}
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#endif
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#endif /* #ifndef _TWI_ */
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