36df84c843
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5145 42af7a65-404d-4744-a932-0658087f49c3
154 lines
7.7 KiB
C
154 lines
7.7 KiB
C
/************************************************************************************
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* arch/arm/src/str71x/str71x_i2c.h
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*
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_STR71X_STR71X_I2C_H
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#define __ARCH_ARM_SRC_STR71X_STR71X_I2C_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include "str71x_map.h"
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/************************************************************************************
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* Pre-procesor Definitions
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************************************************************************************/
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/* Register offets ******************************************************************/
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#define STR71X_I2C_CR_OFFSET (0x0000) /* 8-bits wide */
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#define STR71X_I2C_SR1_OFFSET (0x0004) /* 8-bits wide */
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#define STR71X_I2C_SR2_OFFSET (0x0008) /* 8-bits wide */
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#define STR71X_I2C_CCR_OFFSET (0x000c) /* 8-bits wide */
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#define STR71X_I2C_OAR1_OFFSET (0x0010) /* 8-bits wide */
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#define STR71X_I2C_OAR2_OFFSET (0x0014) /* 8-bits wide */
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#define STR71X_I2C_DR_OFFSET (0x0018) /* 8-bits wide */
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#define STR71X_I2C_ECCR_OFFSET (0x001c) /* 8-bits wide */
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/* Registers ************************************************************************/
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#define STR71X_I2C_CR(b) ((b) + STR71X_I2C_SR_OFFSET)
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#define STR71X_I2C_SR1(b) ((b) + STR71X_I2C_SR1_OFFSET)
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#define STR71X_I2C_SR2(b) ((b) + STR71X_I2C_SR2_OFFSET)
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#define STR71X_I2C_CCR(b) ((b) + STR71X_I2C_CCR_OFFSET)
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#define STR71X_I2C_OAR1(b) ((b) + STR71X_I2C_OAR1_OFFSET)
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#define STR71X_I2C_OAR2(b) ((b) + STR71X_I2C_OAR2_OFFSET)
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#define STR71X_I2C_DR(b) ((b) + STR71X_I2C_DR_OFFSET)
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#define STR71X_I2C_ECCR(b) ((b) + STR71X_I2C_ECCR_OFFSET)
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#define STR71X_I2C0_CR (STR71X_I2C0_BASE + STR71X_I2C_SR_OFFSET)
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#define STR71X_I2C0_SR1 (STR71X_I2C0_BASE + STR71X_I2C_SR1_OFFSET)
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#define STR71X_I2C0_SR2 (STR71X_I2C0_BASE + STR71X_I2C_SR2_OFFSET)
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#define STR71X_I2C0_CCR (STR71X_I2C0_BASE + STR71X_I2C_CCR_OFFSET)
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#define STR71X_I2C0_OAR1 (STR71X_I2C0_BASE + STR71X_I2C_OAR1_OFFSET)
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#define STR71X_I2C0_OAR2 (STR71X_I2C0_BASE + STR71X_I2C_OAR2_OFFSET)
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#define STR71X_I2C0_DR (STR71X_I2C0_BASE + STR71X_I2C_DR_OFFSET)
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#define STR71X_I2C0_ECCR (STR71X_I2C0_BASE + STR71X_I2C_ECCR_OFFSET)
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#define STR71X_I2C1_CR (STR71X_I2C1_BASE + STR71X_I2C_SR_OFFSET)
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#define STR71X_I2C1_SR1 (STR71X_I2C1_BASE + STR71X_I2C_SR1_OFFSET)
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#define STR71X_I2C1_SR2 (STR71X_I2C1_BASE + STR71X_I2C_SR2_OFFSET)
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#define STR71X_I2C1_CCR (STR71X_I2C1_BASE + STR71X_I2C_CCR_OFFSET)
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#define STR71X_I2C1_OAR1 (STR71X_I2C1_BASE + STR71X_I2C_OAR1_OFFSET)
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#define STR71X_I2C1_OAR2 (STR71X_I2C1_BASE + STR71X_I2C_OAR2_OFFSET)
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#define STR71X_I2C1_DR (STR71X_I2C1_BASE + STR71X_I2C_DR_OFFSET)
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#define STR71X_I2C1_ECCR (STR71X_I2C1_BASE + STR71X_I2C_ECCR_OFFSET)
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/* Register bit settings ***********************************************************/
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/* I2C Control Register (CR) */
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#define STR71X_I2CCR_ITE (0x01) /* Bit 0: Interrupt enable */
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#define STR71X_I2CCR_STOP (0x02) /* Bit 1: Generation of a stop condition */
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#define STR71X_I2CCR_ACK (0x04) /* Bit 2: Acknowledge enable */
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#define STR71X_I2CCR_START (0x08) /* Bit 3: Generation of a start condition */
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#define STR71X_I2CCR_ENGC (0x10) /* Bit 4: Enable general call */
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#define STR71X_I2CCR_PE (0x20) /* Bit 5: Peripheral enable */
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/* I2C Status Register 1 (SR1) */
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#define STR71X_I2CSR1_SB (0x01) /* Bit 0: Start bit (master mode) */
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#define STR71X_I2CSR1_MSL (0x02) /* Bit 1: Master/slave */
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#define STR71X_I2CSR1_ADSL (0x04) /* Bit 2: Address matched */
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#define STR71X_I2CSR1_BTF (0x08) /* Bit 3: Byte transfer finished */
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#define STR71X_I2CSR1_BUSY (0x10) /* Bit 4: Bus busy */
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#define STR71X_I2CSR1_TRA (0x20) /* Bit 5: Transmitter/receiver */
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#define STR71X_I2CSR1_ADD10 (0x40) /* Bit 6: 10-bit addressing in master mode */
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#define STR71X_I2CSR1_EVF (0x80) /* Bit 7: Event flag */
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/* I2C Status Register 2 (SR2) */
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#define STR71X_I2CSR2_GCAL (0x01) /* Bit 0: General call (slave mode) */
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#define STR71X_I2CSR2_BERR (0x02) /* Bit 1: Bus error */
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#define STR71X_I2CSR2_ARLO (0x04) /* Bit 2: Arbitration lost */
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#define STR71X_I2CSR2_STOPF (0x08) /* Bit 3: Stop detection (slave mode) */
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#define STR71X_I2CSR2_AF (0x10) /* Bit 4: Acknowledge failure */
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#define STR71X_I2CSR2_ENDAD (0x20) /* Bit 5: End of address transmission */
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/* I2C Clock Control Register (CCR) */
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#define STR71X_I2CCCR_DIVMASK (0x7f) /* Bits 0-6: 7 bits of the 12-bit clock divider */
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#define STR71X_I2CCCR_FMSM (0x80) /* Bit 7: Fast/standard I2C mode */
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/* I2C Extended Clock Control Register (ECCR) */
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#define STR71X_I2CECCR_DIVMASK (0x1f) /* Bits 0-5: 5 bits of the 12-bit clock divider */
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/* I2C Own Address Register 2 (OAR2) */
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#define STR71X_I2COAR2_ADDRMASK (0x06) /* Bits 1-2: 2 bits of the 10-bit interface address */
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#define STR71X_I2COAR2_FREQMASK (0xe0) /* Bits 5-7: Frequency */
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#define STR71X_I2COAR2_5_10 (0x00) /* FPCLK1 = 5 to 10 */
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#define STR71X_I2COAR2_10_16 (0x20) /* FPCLK1 = 10 to 16.67 */
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#define STR71X_I2COAR2_16_26 (0x40) /* FPCLK1 = 16.67 to 26.67 */
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#define STR71X_I2COAR2_26_40 (0x60) /* FPCLK1 = 26.67 to 40 */
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#define STR71X_I2COAR2_40_53 (0x80) /* FPCLK1 = 40 to 53.33 */
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/************************************************************************************
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* Public Types
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************************************************************************************/
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/************************************************************************************
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* Public Data
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************************************************************************************/
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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#endif /* __ARCH_ARM_SRC_STR71X_STR71X_I2C_H */
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