188 lines
6.8 KiB
C
188 lines
6.8 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_USART_DMA_H_
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#define _FSL_USART_DMA_H_
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#include "fsl_common.h"
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#include "fsl_dma.h"
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#include "fsl_usart.h"
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/*!
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* @addtogroup usart_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 USART dma driver version 2.0.1. */
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#define FSL_USART_DMA_DRIVER_VERSION (MAKE_VERSION(2, 0, 1))
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/*@}*/
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/* Forward declaration of the handle typedef. */
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typedef struct _usart_dma_handle usart_dma_handle_t;
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/*! @brief UART transfer callback function. */
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typedef void (*usart_dma_transfer_callback_t)(USART_Type *base,
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usart_dma_handle_t *handle,
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status_t status,
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void *userData);
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/*!
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* @brief UART DMA handle
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*/
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struct _usart_dma_handle
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{
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USART_Type *base; /*!< UART peripheral base address. */
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usart_dma_transfer_callback_t callback; /*!< Callback function. */
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void *userData; /*!< UART callback function parameter.*/
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size_t rxDataSizeAll; /*!< Size of the data to receive. */
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size_t txDataSizeAll; /*!< Size of the data to send out. */
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dma_handle_t *txDmaHandle; /*!< The DMA TX channel used. */
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dma_handle_t *rxDmaHandle; /*!< The DMA RX channel used. */
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volatile uint8_t txState; /*!< TX transfer state. */
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volatile uint8_t rxState; /*!< RX transfer state */
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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 DMA transactional
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* @{
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*/
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/*!
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* @brief Initializes the USART handle which is used in transactional functions.
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* @param base USART peripheral base address.
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* @param handle Pointer to usart_dma_handle_t structure.
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* @param callback Callback function.
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* @param userData User data.
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* @param txDmaHandle User-requested DMA handle for TX DMA transfer.
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* @param rxDmaHandle User-requested DMA handle for RX DMA transfer.
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*/
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status_t USART_TransferCreateHandleDMA(USART_Type *base,
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usart_dma_handle_t *handle,
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usart_dma_transfer_callback_t callback,
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void *userData,
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dma_handle_t *txDmaHandle,
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dma_handle_t *rxDmaHandle);
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/*!
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* @brief Sends data using DMA.
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*
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* This function sends data using DMA. This is a non-blocking function, which returns
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* right away. When all data is sent, the send callback function is called.
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*
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* @param base USART peripheral base address.
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* @param handle USART handle pointer.
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* @param xfer USART DMA transfer structure. See #usart_transfer_t.
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* @retval kStatus_Success if succeed, others failed.
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* @retval kStatus_USART_TxBusy Previous transfer on going.
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* @retval kStatus_InvalidArgument Invalid argument.
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*/
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status_t USART_TransferSendDMA(USART_Type *base, usart_dma_handle_t *handle, usart_transfer_t *xfer);
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/*!
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* @brief Receives data using DMA.
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*
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* This function receives data using DMA. This is a non-blocking function, which returns
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* right away. When all data is received, the receive callback function is called.
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*
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* @param base USART peripheral base address.
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* @param handle Pointer to usart_dma_handle_t structure.
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* @param xfer USART DMA transfer structure. See #usart_transfer_t.
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* @retval kStatus_Success if succeed, others failed.
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* @retval kStatus_USART_RxBusy Previous transfer on going.
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* @retval kStatus_InvalidArgument Invalid argument.
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*/
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status_t USART_TransferReceiveDMA(USART_Type *base, usart_dma_handle_t *handle, usart_transfer_t *xfer);
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/*!
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* @brief Aborts the sent data using DMA.
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*
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* This function aborts send data using DMA.
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*
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* @param base USART peripheral base address
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* @param handle Pointer to usart_dma_handle_t structure
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*/
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void USART_TransferAbortSendDMA(USART_Type *base, usart_dma_handle_t *handle);
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/*!
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* @brief Aborts the received data using DMA.
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*
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* This function aborts the received data using DMA.
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*
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* @param base USART peripheral base address
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* @param handle Pointer to usart_dma_handle_t structure
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*/
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void USART_TransferAbortReceiveDMA(USART_Type *base, usart_dma_handle_t *handle);
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/*!
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* @brief Get the number of bytes that have been received.
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*
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* This function gets the number of bytes that have been received.
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*
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* @param base USART peripheral base address.
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* @param handle USART handle pointer.
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* @param count Receive bytes count.
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* @retval kStatus_NoTransferInProgress No receive in progress.
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* @retval kStatus_InvalidArgument Parameter is invalid.
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* @retval kStatus_Success Get successfully through the parameter \p count;
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*/
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status_t USART_TransferGetReceiveCountDMA(USART_Type *base, usart_dma_handle_t *handle, uint32_t *count);
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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_USART_DMA_H_ */
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