207 lines
7.5 KiB
C
207 lines
7.5 KiB
C
/**************************************************************************//**
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* @file i2c.h
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* @version V3.0
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* $Revision: 16 $
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* $Date: 15/05/22 11:23a $
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* @brief 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) 2014 Nuvoton Technology Corp. All rights reserved.
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*
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******************************************************************************/
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#ifndef __I2C_H__
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#define __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 Standard_Driver Standard Driver
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@{
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*/
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/** @addtogroup I2C_Driver I2C Driver
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@{
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*/
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/** @addtogroup I2C_EXPORTED_CONSTANTS I2C Exported Constants
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@{
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*/
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/*---------------------------------------------------------------------------------------------------------*/
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/* I2CON constant definitions. */
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/*---------------------------------------------------------------------------------------------------------*/
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#define I2C_I2CON_STA_SI 0x28UL /*!< I2CON setting for I2C control bits. It would set STA and SI bits */
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#define I2C_I2CON_STA_SI_AA 0x2CUL /*!< I2CON setting for I2C control bits. It would set STA, SI and AA bits */
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#define I2C_I2CON_STO_SI 0x18UL /*!< I2CON setting for I2C control bits. It would set STO and SI bits */
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#define I2C_I2CON_STO_SI_AA 0x1CUL /*!< I2CON setting for I2C control bits. It would set STO, SI and AA bits */
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#define I2C_I2CON_SI 0x08UL /*!< I2CON setting for I2C control bits. It would set SI bit */
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#define I2C_I2CON_SI_AA 0x0CUL /*!< I2CON setting for I2C control bits. It would set SI and AA bits */
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#define I2C_I2CON_STA 0x20UL /*!< I2CON setting for I2C control bits. It would set STA bit */
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#define I2C_I2CON_STO 0x10UL /*!< I2CON setting for I2C control bits. It would set STO bit */
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#define I2C_I2CON_AA 0x04UL /*!< I2CON setting for I2C control bits. It would set AA bit */
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#define I2C_GCMODE_ENABLE 1 /*!< Enable I2C GC Mode */
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#define I2C_GCMODE_DISABLE 0 /*!< Disable I2C GC Mode */
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/*@}*/ /* end of group I2C_EXPORTED_CONSTANTS */
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/** @addtogroup I2C_EXPORTED_FUNCTIONS I2C Exported Functions
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@{
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*/
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/**
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* @brief The macro is used to set I2C bus condition at One Time
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*
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* @param[in] i2c Specify I2C port
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* @param[in] u8Ctrl A byte writes to I2C control register
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*
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* @return None
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*
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* @details Set I2CON register to control I2C bus conditions of START, STOP, SI, ACK.
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*/
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#define I2C_SET_CONTROL_REG(i2c, u8Ctrl) ((i2c)->I2CON = ((i2c)->I2CON & ~0x3c) | (u8Ctrl))
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/**
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* @brief The macro is used to set START condition of I2C Bus
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*
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* @param[in] i2c Specify I2C port
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*
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* @return None
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*
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* @details Set the I2C bus START condition in I2CON register.
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*/
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#define I2C_START(i2c) ((i2c)->I2CON = ((i2c)->I2CON & ~I2C_I2CON_SI_Msk) | I2C_I2CON_STA_Msk)
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/**
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* @brief The macro is used to wait I2C bus status get ready
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*
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* @param[in] i2c Specify I2C port
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*
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* @return None
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*
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* @details When a new status is presented of I2C bus, the SI flag will be set in I2CON register.
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*/
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#define I2C_WAIT_READY(i2c) while(!((i2c)->I2CON & I2C_I2CON_SI_Msk))
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/**
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* @brief The macro is used to Read I2C Bus Data Register
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*
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* @param[in] i2c Specify I2C port
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*
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* @return A byte of I2C data register
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*
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* @details I2C controller read data from bus and save it in I2CDAT register.
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*/
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#define I2C_GET_DATA(i2c) ((i2c)->I2CDAT)
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/**
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* @brief Write a Data to I2C Data Register
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*
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* @param[in] i2c Specify I2C port
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* @param[in] u8Data A byte that writes to data register
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*
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* @return None
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*
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* @details When write a data to I2CDAT register, the I2C controller will shift it to I2C bus.
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*/
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#define I2C_SET_DATA(i2c, u8Data) ((i2c)->I2CDAT = (u8Data))
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/**
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* @brief Get I2C Bus status code
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*
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* @param[in] i2c Specify I2C port
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*
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* @return I2C status code
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*
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* @details To get this status code to monitor I2C bus event.
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*/
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#define I2C_GET_STATUS(i2c) ((i2c)->I2CSTATUS)
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/**
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* @brief Get Time-out flag from I2C Bus
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*
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* @param[in] i2c Specify I2C port
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*
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* @retval 0 I2C Bus time-out is not happened
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* @retval 1 I2C Bus time-out is happened
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*
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* @details When I2C bus occurs time-out event, the time-out flag will be set.
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*/
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#define I2C_GET_TIMEOUT_FLAG(i2c) ( ((i2c)->I2CTOC & I2C_I2CTOC_TIF_Msk) == I2C_I2CTOC_TIF_Msk ? 1:0 )
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/**
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* @brief To get wake-up flag from I2C Bus
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*
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* @param[in] i2c Specify I2C port
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*
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* @retval 0 Chip is not woken-up from power-down mode
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* @retval 1 Chip is woken-up from power-down mode
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*
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* @details I2C bus occurs wake-up event, wake-up flag will be set.
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*/
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#define I2C_GET_WAKEUP_FLAG(i2c) ( ((i2c)->I2CWKUPSTS & I2C_I2CWKUPSTS_WKUPIF_Msk) == I2C_I2CWKUPSTS_WKUPIF_Msk ? 1:0 )
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/**
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* @brief To clear wake-up flag
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*
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* @param[in] i2c Specify I2C port
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*
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* @return None
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*
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* @details If wake-up flag is set, use this macro to clear it.
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*/
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#define I2C_CLEAR_WAKEUP_FLAG(i2c) ((i2c)->I2CWKUPSTS |= I2C_I2CWKUPSTS_WKUPIF_Msk)
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/*---------------------------------------------------------------------------------------------------------*/
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/* inline functions */
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/*---------------------------------------------------------------------------------------------------------*/
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/**
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* @brief The macro is used to set STOP condition of I2C Bus
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*
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* @param[in] i2c Specify I2C port
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*
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* @return None
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*
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* @details Set the I2C bus STOP condition in I2CON register and wait STOP condition finish.
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*/
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static __INLINE void I2C_STOP(I2C_T *i2c)
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{
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(i2c)->I2CON |= (I2C_I2CON_SI_Msk | I2C_I2CON_STO_Msk);
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while((i2c)->I2CON & I2C_I2CON_STO_Msk);
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}
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void I2C_ClearTimeoutFlag(I2C_T *i2c);
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void I2C_Close(I2C_T *i2c);
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void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack);
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void I2C_DisableInt(I2C_T *i2c);
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void I2C_EnableInt(I2C_T *i2c);
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uint32_t I2C_GetBusClockFreq(I2C_T *i2c);
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uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock);
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uint32_t I2C_GetIntFlag(I2C_T *i2c);
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uint32_t I2C_GetStatus(I2C_T *i2c);
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uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock);
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uint8_t I2C_GetData(I2C_T *i2c);
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void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode);
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void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask);
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void I2C_EnableTimeout(I2C_T *i2c, uint8_t u8LongTimeout);
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void I2C_DisableTimeout(I2C_T *i2c);
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void I2C_EnableWakeup(I2C_T *i2c);
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void I2C_DisableWakeup(I2C_T *i2c);
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void I2C_SetData(I2C_T *i2c, uint8_t u8Data);
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/*@}*/ /* end of group I2C_EXPORTED_FUNCTIONS */
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/*@}*/ /* end of group I2C_Driver */
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/*@}*/ /* end of group Device_Driver */
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#ifdef __cplusplus
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}
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#endif
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#endif //__I2C_H__
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