190 lines
7.1 KiB
C
190 lines
7.1 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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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 provided 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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* 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_LPUART_EDMA_H_
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#define _FSL_LPUART_EDMA_H_
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#include "fsl_lpuart.h"
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#include "fsl_edma.h"
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/*!
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* @addtogroup lpuart_edma_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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/* Forward declaration of the handle typedef. */
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typedef struct _lpuart_edma_handle lpuart_edma_handle_t;
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/*! @brief LPUART transfer callback function. */
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typedef void (*lpuart_edma_transfer_callback_t)(LPUART_Type *base,
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lpuart_edma_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 LPUART eDMA handle
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*/
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struct _lpuart_edma_handle
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{
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lpuart_edma_transfer_callback_t callback; /*!< Callback function. */
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void *userData; /*!< LPUART 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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edma_handle_t *txEdmaHandle; /*!< The eDMA TX channel used. */
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edma_handle_t *rxEdmaHandle; /*!< The eDMA RX channel used. */
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uint8_t nbytes; /*!< eDMA minor byte transfer count initially configured. */
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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
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/*!
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* @name eDMA transactional
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* @{
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*/
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/*!
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* @brief Initializes the LPUART handle which is used in transactional functions.
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* @param base LPUART peripheral base address.
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* @param handle Pointer to lpuart_edma_handle_t structure.
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* @param callback Callback function.
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* @param userData User data.
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* @param txEdmaHandle User requested DMA handle for TX DMA transfer.
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* @param rxEdmaHandle User requested DMA handle for RX DMA transfer.
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*/
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void LPUART_TransferCreateHandleEDMA(LPUART_Type *base,
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lpuart_edma_handle_t *handle,
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lpuart_edma_transfer_callback_t callback,
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void *userData,
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edma_handle_t *txEdmaHandle,
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edma_handle_t *rxEdmaHandle);
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/*!
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* @brief Sends data using eDMA.
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*
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* This function sends data using eDMA. 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 LPUART peripheral base address.
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* @param handle LPUART handle pointer.
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* @param xfer LPUART eDMA transfer structure. See #lpuart_transfer_t.
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* @retval kStatus_Success if succeed, others failed.
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* @retval kStatus_LPUART_TxBusy Previous transfer on going.
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* @retval kStatus_InvalidArgument Invalid argument.
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*/
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status_t LPUART_SendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer);
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/*!
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* @brief Receives data using eDMA.
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*
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* This function receives data using eDMA. This is 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 LPUART peripheral base address.
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* @param handle Pointer to lpuart_edma_handle_t structure.
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* @param xfer LPUART eDMA transfer structure, see #lpuart_transfer_t.
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* @retval kStatus_Success if succeed, others fail.
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* @retval kStatus_LPUART_RxBusy Previous transfer ongoing.
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* @retval kStatus_InvalidArgument Invalid argument.
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*/
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status_t LPUART_ReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer);
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/*!
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* @brief Aborts the sent data using eDMA.
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*
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* This function aborts the sent data using eDMA.
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*
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* @param base LPUART peripheral base address.
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* @param handle Pointer to lpuart_edma_handle_t structure.
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*/
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void LPUART_TransferAbortSendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle);
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/*!
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* @brief Aborts the received data using eDMA.
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*
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* This function aborts the received data using eDMA.
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*
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* @param base LPUART peripheral base address.
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* @param handle Pointer to lpuart_edma_handle_t structure.
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*/
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void LPUART_TransferAbortReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle);
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/*!
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* @brief Gets the number of bytes written to the LPUART TX register.
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*
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* This function gets the number of bytes written to the LPUART TX
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* register by DMA.
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*
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* @param base LPUART peripheral base address.
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* @param handle LPUART handle pointer.
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* @param count Send bytes count.
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* @retval kStatus_NoTransferInProgress No send 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 LPUART_TransferGetSendCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count);
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/*!
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* @brief Gets the number of received bytes.
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*
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* This function gets the number of received bytes.
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*
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* @param base LPUART peripheral base address.
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* @param handle LPUART 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 LPUART_TransferGetReceiveCountEDMA(LPUART_Type *base, lpuart_edma_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_LPUART_EDMA_H_ */
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