235 lines
9.4 KiB
C
235 lines
9.4 KiB
C
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/*
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* The Clear BSD License
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* Copyright (c) 2016, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted (subject to the limitations in the disclaimer below) provided
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* that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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 2.0.2. */
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#define FSL_SPI_DMA_DRIVER_VERSION (MAKE_VERSION(2, 0, 2))
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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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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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uint8_t bytesPerFrame; /*!< Bytes in a frame for SPI tranfer */
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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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};
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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 transfer 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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