109 lines
4.1 KiB
C
109 lines
4.1 KiB
C
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/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, 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 conditions are 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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#ifndef TWI_H
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#define TWI_H
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include <board.h>
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//------------------------------------------------------------------------------
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// Global definitions
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//------------------------------------------------------------------------------
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// Missing AT91C_TWI_TXRDY definition.
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#ifndef AT91C_TWI_TXRDY
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#define AT91C_TWI_TXRDY AT91C_TWI_TXRDY_MASTER
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#endif
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// Missing AT91C_TWI_TXCOMP definition.
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#ifndef AT91C_TWI_TXCOMP
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#define AT91C_TWI_TXCOMP AT91C_TWI_TXCOMP_MASTER
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#endif
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//------------------------------------------------------------------------------
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// Global macros
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//------------------------------------------------------------------------------
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/// Returns 1 if the TXRDY bit (ready to transmit data) is set in the given
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/// status register value.
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#define TWI_STATUS_TXRDY(status) ((status & AT91C_TWI_TXRDY) == AT91C_TWI_TXRDY)
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/// Returns 1 if the RXRDY bit (ready to receive data) is set in the given
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/// status register value.
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#define TWI_STATUS_RXRDY(status) ((status & AT91C_TWI_RXRDY) == AT91C_TWI_RXRDY)
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/// Returns 1 if the TXCOMP bit (transfer complete) is set in the given
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/// status register value.
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#define TWI_STATUS_TXCOMP(status) ((status & AT91C_TWI_TXCOMP) == AT91C_TWI_TXCOMP)
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//------------------------------------------------------------------------------
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// Global functions
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//------------------------------------------------------------------------------
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extern void TWI_Configure(AT91S_TWI *pTwi, unsigned int twck, unsigned int mck);
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extern void TWI_Stop(AT91S_TWI *pTwi);
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extern void TWI_StartRead(
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AT91S_TWI *pTwi,
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unsigned char address,
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unsigned int iaddress,
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unsigned char isize);
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extern unsigned char TWI_ReadByte(AT91S_TWI *pTwi);
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extern void TWI_WriteByte(AT91S_TWI *pTwi, unsigned char byte);
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extern void TWI_StartWrite(
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AT91S_TWI *pTwi,
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unsigned char address,
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unsigned int iaddress,
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unsigned char isize,
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unsigned char byte);
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extern unsigned char TWI_ByteReceived(AT91S_TWI *pTwi);
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extern unsigned char TWI_ByteSent(AT91S_TWI *pTwi);
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extern unsigned char TWI_TransferComplete(AT91S_TWI *pTwi);
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extern void TWI_EnableIt(AT91S_TWI *pTwi, unsigned int sources);
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extern void TWI_DisableIt(AT91S_TWI *pTwi, unsigned int sources);
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extern unsigned int TWI_GetStatus(AT91S_TWI *pTwi);
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extern unsigned int TWI_GetMaskedStatus(AT91S_TWI *pTwi);
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#endif //#ifndef TWI_H
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