216 lines
8.3 KiB
C
216 lines
8.3 KiB
C
/*
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* Copyright (c) 2016, Freescale Semiconductor, Inc.
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* Copyright 2016-2020 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_SPI_DMA_H_
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#define FSL_SPI_DMA_H_
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#include "fsl_dma.h"
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#include "fsl_spi.h"
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/*!
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* @addtogroup spi_dma_driver
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* @{
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*/
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/*! @file */
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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 SPI DMA driver version 2.1.1. */
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#define FSL_SPI_DMA_DRIVER_VERSION (MAKE_VERSION(2, 2, 1))
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/*! @} */
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typedef struct _spi_dma_handle spi_dma_handle_t;
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/*! @brief SPI DMA callback called at the end of transfer. */
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typedef void (*spi_dma_callback_t)(SPI_Type *base, spi_dma_handle_t *handle, status_t status, void *userData);
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/*! @brief SPI DMA transfer handle, users should not touch the content of the handle.*/
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struct _spi_dma_handle
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{
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volatile bool txInProgress; /*!< Send transfer finished */
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volatile bool rxInProgress; /*!< Receive transfer finished */
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uint8_t bytesPerFrame; /*!< Bytes in a frame for SPI transfer */
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uint8_t lastwordBytes; /*!< The Bytes of lastword for master*/
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dma_handle_t *txHandle; /*!< DMA handler for SPI send */
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dma_handle_t *rxHandle; /*!< DMA handler for SPI receive */
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spi_dma_callback_t callback; /*!< Callback for SPI DMA transfer */
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void *userData; /*!< User Data for SPI DMA callback */
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uint32_t state; /*!< Internal state of SPI DMA transfer */
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size_t transferSize; /*!< Bytes need to be transfer */
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uint32_t instance; /*!< Index of SPI instance*/
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uint8_t *txNextData; /*!< The pointer of next time tx data*/
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uint8_t *txEndData; /*!< The pointer of end of data*/
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uint8_t *rxNextData; /*!< The pointer of next time rx data*/
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uint8_t *rxEndData; /*!< The pointer of end of rx data*/
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uint32_t dataBytesEveryTime; /*!< Bytes in a time for DMA transfer, default is DMA_MAX_TRANSFER_COUNT */
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};
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/*******************************************************************************
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* APIs
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******************************************************************************/
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/*!
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* @name DMA Transactional
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* @{
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*/
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/*!
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* @brief Initialize the SPI master DMA handle.
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*
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* This function initializes the SPI master DMA handle which can be used for other SPI master transactional APIs.
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* Usually, for a specified SPI instance, user need only call this API once to get the initialized handle.
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*
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* @param base SPI peripheral base address.
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* @param handle SPI handle pointer.
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* @param callback User callback function called at the end of a transfer.
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* @param userData User data for callback.
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* @param txHandle DMA handle pointer for SPI Tx, the handle shall be static allocated by users.
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* @param rxHandle DMA handle pointer for SPI Rx, the handle shall be static allocated by users.
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*/
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status_t SPI_MasterTransferCreateHandleDMA(SPI_Type *base,
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spi_dma_handle_t *handle,
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spi_dma_callback_t callback,
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void *userData,
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dma_handle_t *txHandle,
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dma_handle_t *rxHandle);
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/*!
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* @brief Perform a non-blocking SPI transfer using DMA.
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*
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* @note This interface returned immediately after transfer initiates, users should call
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* SPI_GetTransferStatus to poll the transfer status to check whether SPI transfer finished.
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*
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* @param base SPI peripheral base address.
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* @param handle SPI DMA handle pointer.
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* @param xfer Pointer to dma transfer structure.
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* @retval kStatus_Success Successfully start a transfer.
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* @retval kStatus_InvalidArgument Input argument is invalid.
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* @retval kStatus_SPI_Busy SPI is not idle, is running another transfer.
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*/
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status_t SPI_MasterTransferDMA(SPI_Type *base, spi_dma_handle_t *handle, spi_transfer_t *xfer);
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/*!
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* @brief Transfers a block of data using a DMA method.
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*
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* This function using polling way to do the first half transimission and using DMA way to
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* do the srcond half transimission, the transfer mechanism is half-duplex.
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* When do the second half transimission, code will return right away. When all data is transferred,
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* the callback function is called.
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*
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* @param base SPI base pointer
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* @param handle A pointer to the spi_master_dma_handle_t structure which stores the transfer state.
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* @param xfer A pointer to the spi_half_duplex_transfer_t structure.
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* @return status of status_t.
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*/
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status_t SPI_MasterHalfDuplexTransferDMA(SPI_Type *base, spi_dma_handle_t *handle, spi_half_duplex_transfer_t *xfer);
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/*!
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* @brief Initialize the SPI slave DMA handle.
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*
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* This function initializes the SPI slave DMA handle which can be used for other SPI master transactional APIs.
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* Usually, for a specified SPI instance, user need only call this API once to get the initialized handle.
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*
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* @param base SPI peripheral base address.
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* @param handle SPI handle pointer.
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* @param callback User callback function called at the end of a transfer.
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* @param userData User data for callback.
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* @param txHandle DMA handle pointer for SPI Tx, the handle shall be static allocated by users.
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* @param rxHandle DMA handle pointer for SPI Rx, the handle shall be static allocated by users.
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*/
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static inline status_t SPI_SlaveTransferCreateHandleDMA(SPI_Type *base,
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spi_dma_handle_t *handle,
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spi_dma_callback_t callback,
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void *userData,
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dma_handle_t *txHandle,
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dma_handle_t *rxHandle)
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{
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return SPI_MasterTransferCreateHandleDMA(base, handle, callback, userData, txHandle, rxHandle);
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}
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/*!
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* @brief Perform a non-blocking SPI transfer using DMA.
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*
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* @note This interface returned immediately after transfer initiates, users should call
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* SPI_GetTransferStatus to poll the transfer status to check whether SPI transfer finished.
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*
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* @param base SPI peripheral base address.
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* @param handle SPI DMA handle pointer.
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* @param xfer Pointer to dma transfer structure.
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* @retval kStatus_Success Successfully start a transfer.
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* @retval kStatus_InvalidArgument Input argument is invalid.
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* @retval kStatus_SPI_Busy SPI is not idle, is running another transfer.
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*/
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static inline status_t SPI_SlaveTransferDMA(SPI_Type *base, spi_dma_handle_t *handle, spi_transfer_t *xfer)
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{
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return SPI_MasterTransferDMA(base, handle, xfer);
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}
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/*!
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* @brief Abort a SPI transfer using DMA.
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*
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* @param base SPI peripheral base address.
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* @param handle SPI DMA handle pointer.
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*/
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void SPI_MasterTransferAbortDMA(SPI_Type *base, spi_dma_handle_t *handle);
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/*!
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* @brief Gets the master DMA transfer remaining bytes.
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*
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* This function gets the master DMA transfer remaining bytes.
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*
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* @param base SPI peripheral base address.
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* @param handle A pointer to the spi_dma_handle_t structure which stores the transfer state.
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* @param count A number of bytes transferred by the non-blocking transaction.
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* @return status of status_t.
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*/
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status_t SPI_MasterTransferGetCountDMA(SPI_Type *base, spi_dma_handle_t *handle, size_t *count);
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/*!
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* @brief Abort a SPI transfer using DMA.
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*
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* @param base SPI peripheral base address.
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* @param handle SPI DMA handle pointer.
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*/
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static inline void SPI_SlaveTransferAbortDMA(SPI_Type *base, spi_dma_handle_t *handle)
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{
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SPI_MasterTransferAbortDMA(base, handle);
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}
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/*!
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* @brief Gets the slave DMA transfer remaining bytes.
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*
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* This function gets the slave DMA transfer remaining bytes.
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*
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* @param base SPI peripheral base address.
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* @param handle A pointer to the spi_dma_handle_t structure which stores the transfer state.
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* @param count A number of bytes transferred by the non-blocking transaction.
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* @return status of status_t.
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*/
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static inline status_t SPI_SlaveTransferGetCountDMA(SPI_Type *base, spi_dma_handle_t *handle, size_t *count)
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{
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return SPI_MasterTransferGetCountDMA(base, handle, count);
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}
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/*! @} */
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#if defined(__cplusplus)
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}
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#endif
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/*! @} */
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#endif /* FSL_SPI_DMA_H_*/
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