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/************************************************************************************
* arch/arm/src/lpc214x/lpc214x_i2c.h
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE
* COPYRIGHT OWNER 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.
*
************************************************************************************/
#ifndef _ARCH_ARM_SRC_LPC214X_I2C_H
#define _ARCH_ARM_SRC_LPC214X_I2C_H
/************************************************************************************
* Included Files
************************************************************************************/
#include "chip.h"
/************************************************************************************
* Definitions
************************************************************************************/
/* Register address Offsets *********************************************************/
/* Defined in chip.h */
/* Register Address Definitions *****************************************************/
#define LPC214X_I2C0_CONSET (LPC214X_I2C0_BASE + LPC214X_I2C_ONSET_OFFSET)
#define LPC214X_I2C0_STAT (LPC214X_I2C0_BASE + LPC214X_I2C_STAT_OFFSET)
#define LPC214X_I2C0_DAT (LPC214X_I2C0_BASE + LPC214X_I2C_DAT_OFFSET)
#define LPC214X_I2C0_ADR (LPC214X_I2C0_BASE + LPC214X_I2C_ADR_OFFSET)
#define LPC214X_I2C0_SCLH (LPC214X_I2C0_BASE + LPC214X_I2C_SCLH_OFFSET)
#define LPC214X_I2C0_SCLL (LPC214X_I2C0_BASE + LPC214X_I2C_SCLL_OFFSET)
#define LPC214X_I2C0_CONCLR (LPC214X_I2C0_BASE + LPC214X_I2C_ONCLR_OFFSET)
#define LPC214X_I2C1_CONSET (LPC214X_I2C1_BASE + LPC214X_I2C_ONSET_OFFSET)
#define LPC214X_I2C1_STAT (LPC214X_I2C1_BASE + LPC214X_I2C_STAT_OFFSET)
#define LPC214X_I2C1_DAT (LPC214X_I2C1_BASE + LPC214X_I2C_DAT_OFFSET)
#define LPC214X_I2C1_ADR (LPC214X_I2C1_BASE + LPC214X_I2C_ADR_OFFSET)
#define LPC214X_I2C1_SCLH (LPC214X_I2C1_BASE + LPC214X_I2C_SCLH_OFFSET)
#define LPC214X_I2C1_SCLL (LPC214X_I2C1_BASE + LPC214X_I2C_SCLL_OFFSET)
#define LPC214X_I2C1_CONCLR (LPC214X_I2C1_BASE + LPC214X_I2C_ONCLR_OFFSET)
/* I2C register bit definitions *****************************************************/
/* Control Set Register (CONSET) */
#define I2C_CONSET_AA (1 << 2) /* Bit 2: Assert acknowledge flag */
#define I2C_CONSET_SI (1 << 3) /* Bit 3: I2C interrrupt flag */
#define I2C_CONSET_STO (1 << 4) /* Bit 4: STOP flag */
#define I2C_CONSET_STA (1 << 5) /* Bit 5: START flag */
#define I2C_CONSET_I2EN (1 << 6) /* Bit 6: I2C interface enable */
/* Control Clear Register (CONCLR) */
#define I2C_CONCLR_AAC (1 << 2) /* Bit 2: Assert acknowledge Clear bit */
#define I2C_CONCLR_SIC (1 << 3) /* Bit 3: I2C interrupt Clear bit */
#define I2C_CONCLR_STAC (1 << 5) /* Bit 5: START flag Clear bit */
#define I2C_CONCLR_I2ENC (1 << 6) /* Bit 6: I2C interface Disable bit */
/* Status Register (STAT) */
#define I2C_STAT_SHIFT (1 << 3) /* Bits 3-7: Status bits */
#define I2C_STAT_MASK (0xff << I2C_STAT_SHIFT)
/* Master transmit mode */
# define I2C_STAT_MXSTART (0 << I2C_STAT_SHIFT) /* Start transmitted */
# define I2C_STAT_MXRSTART (2 << I2C_STAT_SHIFT) /* Repeated start transmitted */
# define I2C_STAT_MXSLAWACK (3 << I2C_STAT_SHIFT) /* SLA+W tranmitted + ACK received */
# define I2C_STAT_MXSLAWNAK (4 << I2C_STAT_SHIFT) /* SLA+W tranmitted + NAK received */
# define I2C_STAT_MXDATAACK (5 << I2C_STAT_SHIFT) /* Data tranmitted + ACK received */
# define I2C_STAT_MXDATANAK (6 << I2C_STAT_SHIFT) /* Data tranmitted + NAK received */
# define I2C_STAT_MXARBLOST (7 << I2C_STAT_SHIFT) /* Abritration lost in SLA+W or data */
/* Master receive mode */
# define I2C_STAT_MRSTART (0 << I2C_STAT_SHIFT) /* Start transmitted */
# define I2C_STAT_MRRSTART (2 << I2C_STAT_SHIFT) /* Repeated start transmitted */
# define I2C_STAT_MRARBLOST (7 << I2C_STAT_SHIFT) /* Abritration lost in NAK bit */
# define I2C_STAT_MRSLARACK (8 << I2C_STAT_SHIFT) /* SLA+R tranmitted + ACK received */
# define I2C_STAT_MRSLARNAK (9 << I2C_STAT_SHIFT) /* SLA+R tranmitted + NAK received */
# define I2C_STAT_MRDATAACK (10 << I2C_STAT_SHIFT) /* Data received + send ACK */
# define I2C_STAT_MRDATANAK (11 << I2C_STAT_SHIFT) /* Data received + send NAK */
/* Slave receive mode -- to be provided */
/* Slave receive mode -- to be provided */
/* Data Register (DAT) -- 8-bits of data */
/* Slave Address Register (ADR) */
#define I2C_ADR_GCA (1 << 0) /* Bit 0: General call enable */
#define I2C_ADR_SHIFT 1 /* Bits 7-1: address */
#define I2C_ADR_MASK (0x7f << I2C_ADR_SHIFT)
/* SCL Duty Cycle Register (high half word - SCLH) - 16-bits of data */
/* SCL Duty Cycle Register (low half word - SCLL) - 16-bits of data */
/************************************************************************************
* Public Types
************************************************************************************/
/************************************************************************************
* Inline Functions
************************************************************************************/
/************************************************************************************
* Public Function Prototypes
************************************************************************************/
#endif /* _ARCH_ARM_SRC_LPC214X_I2C_H */
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