/************************************************************************************ * arch/arm/src/lpc214x/lpc214x_i2c.h * * Copyright (C) 2009 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 */