106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
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/**************************************************************************//**
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* @file i2c.h
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* @brief N9H30 I2C driver header file
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*
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* @note
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* SPDX-License-Identifier: Apache-2.0
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* Copyright (C) 2018 Nuvoton Technology Corp. All rights reserved.
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*****************************************************************************/
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#ifndef __NU_I2C_H__
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#define __NU_I2C_H__
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/** @addtogroup N9H30_Device_Driver N9H30 Device Driver
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@{
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*/
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/** @addtogroup N9H30_I2C_Driver I2C Driver
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@{
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*/
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/** @addtogroup N9H30_I2C_EXPORTED_CONSTANTS I2C Exported Constants
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@{
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*/
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/// @cond HIDDEN_SYMBOLS
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/*-----------------------------------------*/
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/* marco, type and constant definitions */
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/*-----------------------------------------*/
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#define I2C_MAX_BUF_LEN 450
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/*-----------------------------------------*/
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/* global interface variables declarations */
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/*-----------------------------------------*/
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/*
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bit map in CMDR
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*/
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#define I2C_CMD_START 0x10
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#define I2C_CMD_STOP 0x08
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#define I2C_CMD_READ 0x04
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#define I2C_CMD_WRITE 0x02
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#define I2C_CMD_NACK 0x01
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/*
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for transfer use
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*/
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#define I2C_WRITE 0x00
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#define I2C_READ 0x01
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#define I2C_STATE_NOP 0x00
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#define I2C_STATE_READ 0x01
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#define I2C_STATE_WRITE 0x02
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#define I2C_STATE_PROBE 0x03
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/*
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i2c register offset
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*/
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#define I2C_CSR (0x00) /*!< Control and Status Register */
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#define I2C_DIVIDER (0x04) /*!< Clock Prescale Register */
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#define I2C_CMDR (0x08) /*!< Command Register */
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#define I2C_SWR (0x0C) /*!< Software Mode Control Register */
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#define I2C_RxR (0x10) /*!< Data Receive Register */
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#define I2C_TxR (0x14) /*!< Data Transmit Register */
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/// @endcond HIDDEN_SYMBOLS
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/*
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ioctl commands
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*/
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#define I2C_IOC_SET_DEV_ADDRESS 0 /*!< Set device slave address */
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#define I2C_IOC_SET_SUB_ADDRESS 1 /*!< Set sub address */
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#define I2C_IOC_SET_SPEED 2 /*!< Set I2C interface speed */
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/*
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error code
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*/
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#define I2C_ERR_ID 0xFFFF1100 /*!< I2C library ID */
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#define I2C_ERR_NOERROR (0x00) /*!< No error */
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#define I2C_ERR_LOSTARBITRATION (0x01 | I2C_ERR_ID) /*!< Arbitration lost error */
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#define I2C_ERR_BUSBUSY (0x02 | I2C_ERR_ID) /*!< Bus busy error */
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#define I2C_ERR_NACK (0x03 | I2C_ERR_ID) /*!< data transfer error */
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#define I2C_ERR_SLAVENACK (0x04 | I2C_ERR_ID) /*!< slave not respond after address */
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#define I2C_ERR_NODEV (0x05 | I2C_ERR_ID) /*!< Wrong device */
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#define I2C_ERR_BUSY (0x06 | I2C_ERR_ID) /*!< Device busy */
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#define I2C_ERR_IO (0x07 | I2C_ERR_ID) /*!< Interface not open */
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#define I2C_ERR_NOTTY (0x08 | I2C_ERR_ID) /*!< Command not support */
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/*@}*/ /* end of group N9H30_I2C_EXPORTED_CONSTANTS */
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/*@}*/ /* end of group N9H30_I2C_Driver */
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/*@}*/ /* end of group N9H30_Device_Driver */
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#ifdef __cplusplus
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}
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#endif
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#endif //__NU_I2C_H__
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/*** (C) COPYRIGHT 2018 Nuvoton Technology Corp. ***/
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