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mbed-os/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K82F/drivers/fsl_i2c_edma.h
- Committer:
- kadonotakashi
- Date:
- 2018-10-11
- Revision:
- 3:f3764f852aa8
- Parent:
- 0:8fdf9a60065b
File content as of revision 3:f3764f852aa8:
/* * Copyright (c) 2015, Freescale Semiconductor, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * o Redistributions of source code must retain the above copyright notice, this list * of conditions and the following disclaimer. * * o 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. * * o Neither the name of Freescale Semiconductor, Inc. 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 HOLDER 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 _FSL_I2C_DMA_H_ #define _FSL_I2C_DMA_H_ #include "fsl_i2c.h" #include "fsl_dmamux.h" #include "fsl_edma.h" /*! * @addtogroup i2c_edma_driver * @{ */ /******************************************************************************* * Definitions ******************************************************************************/ /*! @brief I2C master eDMA handle typedef. */ typedef struct _i2c_master_edma_handle i2c_master_edma_handle_t; /*! @brief I2C master eDMA transfer callback typedef. */ typedef void (*i2c_master_edma_transfer_callback_t)(I2C_Type *base, i2c_master_edma_handle_t *handle, status_t status, void *userData); /*! @brief I2C master eDMA transfer structure. */ struct _i2c_master_edma_handle { i2c_master_transfer_t transfer; /*!< I2C master transfer structure. */ size_t transferSize; /*!< Total bytes to be transferred. */ uint8_t nbytes; /*!< eDMA minor byte transfer count initially configured. */ uint8_t state; /*!< I2C master transfer status. */ edma_handle_t *dmaHandle; /*!< The eDMA handler used. */ i2c_master_edma_transfer_callback_t completionCallback; /*!< A callback function called after the eDMA transfer is finished. */ void *userData; /*!< A callback parameter passed to the callback function. */ }; /******************************************************************************* * API ******************************************************************************/ #if defined(__cplusplus) extern "C" { #endif /*_cplusplus. */ /*! * @name I2C Block eDMA Transfer Operation * @{ */ /*! * @brief Initializes the I2C handle which is used in transcational functions. * * @param base I2C peripheral base address. * @param handle A pointer to the i2c_master_edma_handle_t structure. * @param callback A pointer to the user callback function. * @param userData A user parameter passed to the callback function. * @param edmaHandle eDMA handle pointer. */ void I2C_MasterCreateEDMAHandle(I2C_Type *base, i2c_master_edma_handle_t *handle, i2c_master_edma_transfer_callback_t callback, void *userData, edma_handle_t *edmaHandle); /*! * @brief Performs a master eDMA non-blocking transfer on the I2C bus. * * @param base I2C peripheral base address. * @param handle A pointer to the i2c_master_edma_handle_t structure. * @param xfer A pointer to the transfer structure of i2c_master_transfer_t. * @retval kStatus_Success Sucessfully completed the data transmission. * @retval kStatus_I2C_Busy A previous transmission is still not finished. * @retval kStatus_I2C_Timeout Transfer error, waits for a signal timeout. * @retval kStatus_I2C_ArbitrationLost Transfer error, arbitration lost. * @retval kStataus_I2C_Nak Transfer error, receive NAK during transfer. */ status_t I2C_MasterTransferEDMA(I2C_Type *base, i2c_master_edma_handle_t *handle, i2c_master_transfer_t *xfer); /*! * @brief Gets a master transfer status during the eDMA non-blocking transfer. * * @param base I2C peripheral base address. * @param handle A pointer to the i2c_master_edma_handle_t structure. * @param count A number of bytes transferred by the non-blocking transaction. */ status_t I2C_MasterTransferGetCountEDMA(I2C_Type *base, i2c_master_edma_handle_t *handle, size_t *count); /*! * @brief Aborts a master eDMA non-blocking transfer early. * * @param base I2C peripheral base address. * @param handle A pointer to the i2c_master_edma_handle_t structure. */ void I2C_MasterTransferAbortEDMA(I2C_Type *base, i2c_master_edma_handle_t *handle); /* @} */ #if defined(__cplusplus) } #endif /*_cplusplus. */ /*@}*/ #endif /*_FSL_I2C_DMA_H_*/