at91_twi.h

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#ifndef _ARCH_ARM_AT91_TWI_H_
#define _ARCH_ARM_AT91_TWI_H_

/*
 * Copyright (C) 2006 by egnite Software GmbH. 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. Neither the name of the copyright holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
 * ``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 DISCLAIMED. IN NO EVENT SHALL EGNITE
 * SOFTWARE GMBH OR CONTRIBUTORS 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.
 *
 * For additional information see http://www.ethernut.de/
 */


#define TWI_CR_OFF              0x00000000      
#define TWI_CR      (TWI_BASE + TWI_CR_OFF)     
#define TWI_START               0x00000001      
#define TWI_STOP                0x00000002      
#define TWI_MSEN                0x00000004      
#define TWI_MSDIS               0x00000008      
#define TWI_SVEN                0x00000010      
#define TWI_SVDIS               0x00000020      
#define TWI_SWRST               0x00000080      


#define TWI_MMR_OFF             0x00000004      
#define TWI_MMR     (TWI_BASE + TWI_MMR_OFF)    
#define TWI_IADRSZ              0x00000300      
#define TWI_IADRSZ_NONE         0x00000000      
#define TWI_IADRSZ_1BYTE        0x00000100      
#define TWI_IADRSZ_2BYTE        0x00000200      
#define TWI_IADRSZ_3BYTE        0x00000300      
#define TWI_MREAD               0x00001000      
#define TWI_DADR                0x007F0000      
#define TWI_DADR_LSB                    16      


#define TWI_SMR_OFF             0x00000008      
#define TWI_SMR     (TWI_BASE + TWI_SMR_OFF)    
#define TWI_SADR                0x007F0000      
#define TWI_SADR_LSB                    16      


#define TWI_IADRR_OFF           0x0000000C      
#define TWI_IADRR   (TWI_BASE + TWI_IADRR_OFF)  
#define TWI_IADR                0x00FFFFFF      
#define TWI_IADR_LSB                    0       


#define TWI_CWGR_OFF            0x00000010      
#define TWI_CWGR    (TWI_BASE + TWI_CWGR_OFF)   
#define TWI_CLDIV                0x000000FF     
#define TWI_CLDIV_LSB                    0      
#define TWI_CHDIV                0x0000FF00     
#define TWI_CHDIV_LSB                    8      
#define TWI_CKDIV                0x00070000     
#define TWI_CKDIV_LSB                    16     


#define TWI_SR_OFF              0x00000020      
#define TWI_SR      (TWI_BASE + TWI_SR_OFF)     
#define TWI_IER_OFF             0x00000024      
#define TWI_IER     (TWI_BASE + TWI_IER_OFF)    
#define TWI_IDR_OFF             0x00000028      
#define TWI_IDR     (TWI_BASE + TWI_IDR_OFF)    
#define TWI_IMR_OFF             0x0000002C      
#define TWI_IMR     (TWI_BASE + TWI_IMR_OFF)    
#define TWI_TXCOMP              0x00000001      
#define TWI_RXRDY               0x00000002      
#define TWI_TXRDY               0x00000004      
#define TWI_SVREAD              0x00000008      
#define TWI_SVACC               0x00000010      
#define TWI_GACC                0x00000020      
#define TWI_OVRE                0x00000040      
#define TWI_NACK                0x00000100      
#define TWI_ARBLST              0x00000200      
#define TWI_SCLWS               0x00000400      
#define TWI_EOSACC              0x00000800      


#define TWI_RHR_OFF             0x00000030      
#define TWI_RHR     (TWI_BASE + TWI_RHR_OFF)    


#define TWI_THR_OFF             0x00000034      
#define TWI_THR     (TWI_BASE + TWI_THR_OFF)    


#endif                          /* _ARCH_ARM_AT91_TWI_H_ */