125 lines
4.6 KiB
C
125 lines
4.6 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2022 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef FSL_I2C_DMA_H_
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#define FSL_I2C_DMA_H_
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#include "fsl_i2c.h"
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#include "fsl_dma.h"
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/*!
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* @addtogroup i2c_dma_driver
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* @{
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*/
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/*! @name Driver version */
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/*! @{ */
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/*! @brief I2C DMA driver version. */
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#define FSL_I2C_DMA_DRIVER_VERSION (MAKE_VERSION(2, 3, 1))
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/*! @} */
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/*! @brief Maximum lenght of single DMA transfer (determined by capability of the DMA engine) */
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#define I2C_MAX_DMA_TRANSFER_COUNT 1024
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/*! @brief I2C master dma handle typedef. */
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typedef struct _i2c_master_dma_handle i2c_master_dma_handle_t;
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/*! @brief I2C master dma transfer callback typedef. */
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typedef void (*i2c_master_dma_transfer_callback_t)(I2C_Type *base,
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i2c_master_dma_handle_t *handle,
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status_t status,
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void *userData);
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/*! @brief Typedef for master dma handler. */
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typedef void (*flexcomm_i2c_dma_master_irq_handler_t)(I2C_Type *base, i2c_master_dma_handle_t *handle);
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/*! @brief I2C master dma transfer structure. */
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struct _i2c_master_dma_handle
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{
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uint8_t state; /*!< Transfer state machine current state. */
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uint32_t transferCount; /*!< Indicates progress of the transfer */
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uint32_t remainingBytesDMA; /*!< Remaining byte count to be transferred using DMA. */
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uint8_t *buf; /*!< Buffer pointer for current state. */
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uint32_t remainingSubaddr;
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uint8_t subaddrBuf[4];
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bool checkAddrNack; /*!< Whether to check the nack signal is detected during addressing. */
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dma_handle_t *dmaHandle; /*!< The DMA handler used. */
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i2c_master_transfer_t transfer; /*!< Copy of the current transfer info. */
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i2c_master_dma_transfer_callback_t completionCallback; /*!< Callback function called after dma transfer finished. */
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void *userData; /*!< Callback parameter passed to callback function. */
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};
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/*******************************************************************************
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* API
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******************************************************************************/
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#if defined(__cplusplus)
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extern "C" {
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#endif /*_cplusplus. */
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/*!
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* @name I2C Block DMA Transfer Operation
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* @{
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*/
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/*!
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* @brief Init the I2C handle which is used in transactional functions
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*
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* @param base I2C peripheral base address
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* @param handle pointer to i2c_master_dma_handle_t structure
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* @param callback pointer to user callback function
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* @param userData user param passed to the callback function
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* @param dmaHandle DMA handle pointer
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*/
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void I2C_MasterTransferCreateHandleDMA(I2C_Type *base,
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i2c_master_dma_handle_t *handle,
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i2c_master_dma_transfer_callback_t callback,
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void *userData,
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dma_handle_t *dmaHandle);
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/*!
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* @brief Performs a master dma non-blocking transfer on the I2C bus
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*
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* @param base I2C peripheral base address
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* @param handle pointer to i2c_master_dma_handle_t structure
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* @param xfer pointer to transfer structure of i2c_master_transfer_t
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* @retval kStatus_Success Sucessully complete the data transmission.
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* @retval kStatus_I2C_Busy Previous transmission still not finished.
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* @retval kStatus_I2C_Timeout Transfer error, wait signal timeout.
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* @retval kStatus_I2C_ArbitrationLost Transfer error, arbitration lost.
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* @retval kStataus_I2C_Nak Transfer error, receive Nak during transfer.
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*/
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status_t I2C_MasterTransferDMA(I2C_Type *base, i2c_master_dma_handle_t *handle, i2c_master_transfer_t *xfer);
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/*!
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* @brief Get master transfer status during a dma non-blocking transfer
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*
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* @param base I2C peripheral base address
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* @param handle pointer to i2c_master_dma_handle_t structure
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* @param count Number of bytes transferred so far by the non-blocking transaction.
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*/
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status_t I2C_MasterTransferGetCountDMA(I2C_Type *base, i2c_master_dma_handle_t *handle, size_t *count);
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/*!
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* @brief Abort a master dma non-blocking transfer in a early time
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*
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* @param base I2C peripheral base address
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* @param handle pointer to i2c_master_dma_handle_t structure
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*/
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void I2C_MasterTransferAbortDMA(I2C_Type *base, i2c_master_dma_handle_t *handle);
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/*! @} */
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#if defined(__cplusplus)
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}
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#endif /*_cplusplus. */
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/*! @} */
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#endif /*FSL_I2C_DMA_H_*/
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