| /* |
| * Copyright (c) 2015, Freescale Semiconductor, Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * o Redistributions of source code must retain the above copyright notice, this list |
| * of conditions and the following disclaimer. |
| * |
| * o Redistributions in binary form must reproduce the above copyright notice, this |
| * list of conditions and the following disclaimer in the documentation and/or |
| * other materials provided with the distribution. |
| * |
| * o Neither the name of Freescale Semiconductor, Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
| * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #ifndef _FSL_LPUART_EDMA_H_ |
| #define _FSL_LPUART_EDMA_H_ |
| |
| #include "fsl_lpuart.h" |
| #include "fsl_dmamux.h" |
| #include "fsl_edma.h" |
| |
| /*! |
| * @addtogroup lpuart_edma_driver |
| * @{ |
| */ |
| |
| /*! @file*/ |
| |
| /******************************************************************************* |
| * Definitions |
| ******************************************************************************/ |
| |
| /* Forward declaration of the handle typedef. */ |
| typedef struct _lpuart_edma_handle lpuart_edma_handle_t; |
| |
| /*! @brief LPUART transfer callback function. */ |
| typedef void (*lpuart_edma_transfer_callback_t)(LPUART_Type *base, |
| lpuart_edma_handle_t *handle, |
| status_t status, |
| void *userData); |
| |
| /*! |
| * @brief LPUART eDMA handle |
| */ |
| struct _lpuart_edma_handle |
| { |
| lpuart_edma_transfer_callback_t callback; /*!< Callback function. */ |
| void *userData; /*!< LPUART callback function parameter.*/ |
| size_t rxDataSizeAll; /*!< Size of the data to receive. */ |
| size_t txDataSizeAll; /*!< Size of the data to send out. */ |
| |
| edma_handle_t *txEdmaHandle; /*!< The eDMA TX channel used. */ |
| edma_handle_t *rxEdmaHandle; /*!< The eDMA RX channel used. */ |
| |
| volatile uint8_t txState; /*!< TX transfer state. */ |
| volatile uint8_t rxState; /*!< RX transfer state */ |
| }; |
| |
| /******************************************************************************* |
| * API |
| ******************************************************************************/ |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif |
| |
| /*! |
| * @name eDMA transactional |
| * @{ |
| */ |
| |
| /*! |
| * @brief Initializes the LPUART handle which is used in transactional functions. |
| * @param base LPUART peripheral base address. |
| * @param handle Pointer to lpuart_edma_handle_t structure. |
| * @param callback Callback function. |
| * @param userData User data. |
| * @param txEdmaHandle User requested DMA handle for TX DMA transfer. |
| * @param rxEdmaHandle User requested DMA handle for RX DMA transfer. |
| */ |
| void LPUART_TransferCreateHandleEDMA(LPUART_Type *base, |
| lpuart_edma_handle_t *handle, |
| lpuart_edma_transfer_callback_t callback, |
| void *userData, |
| edma_handle_t *txEdmaHandle, |
| edma_handle_t *rxEdmaHandle); |
| |
| /*! |
| * @brief Sends data using eDMA. |
| * |
| * This function sends data using eDMA. This is a non-blocking function, which returns |
| * right away. When all data is sent, the send callback function is called. |
| * |
| * @param base LPUART peripheral base address. |
| * @param handle LPUART handle pointer. |
| * @param xfer LPUART eDMA transfer structure. See #lpuart_transfer_t. |
| * @retval kStatus_Success if succeed, others failed. |
| * @retval kStatus_LPUART_TxBusy Previous transfer on going. |
| * @retval kStatus_InvalidArgument Invalid argument. |
| */ |
| status_t LPUART_SendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer); |
| |
| /*! |
| * @brief Receives data using eDMA. |
| * |
| * This function receives data using eDMA. This is non-blocking function, which returns |
| * right away. When all data is received, the receive callback function is called. |
| * |
| * @param base LPUART peripheral base address. |
| * @param handle Pointer to lpuart_edma_handle_t structure. |
| * @param xfer LPUART eDMA transfer structure, refer to #lpuart_transfer_t. |
| * @retval kStatus_Success if succeed, others fail. |
| * @retval kStatus_LPUART_RxBusy Previous transfer ongoing. |
| * @retval kStatus_InvalidArgument Invalid argument. |
| */ |
| status_t LPUART_ReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer); |
| |
| /*! |
| * @brief Aborts the sent data using eDMA. |
| * |
| * This function aborts the sent data using eDMA. |
| * |
| * @param base LPUART peripheral base address. |
| * @param handle Pointer to lpuart_edma_handle_t structure. |
| */ |
| void LPUART_TransferAbortSendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle); |
| |
| /*! |
| * @brief Aborts the received data using eDMA. |
| * |
| * This function aborts the received data using eDMA. |
| * |
| * @param base LPUART peripheral base address. |
| * @param handle Pointer to lpuart_edma_handle_t structure. |
| */ |
| void LPUART_TransferAbortReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle); |
| |
| /*! |
| * @brief Get the number of bytes that have been written to LPUART TX register. |
| * |
| * This function gets the number of bytes that have been written to LPUART TX |
| * register by DMA. |
| * |
| * @param base LPUART peripheral base address. |
| * @param handle LPUART handle pointer. |
| * @param count Send bytes count. |
| * @retval kStatus_NoTransferInProgress No send in progress. |
| * @retval kStatus_InvalidArgument Parameter is invalid. |
| * @retval kStatus_Success Get successfully through the parameter \p count; |
| */ |
| status_t LPUART_TransferGetSendCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count); |
| |
| /*! |
| * @brief Get the number of bytes that have been received. |
| * |
| * This function gets the number of bytes that have been received. |
| * |
| * @param base LPUART peripheral base address. |
| * @param handle LPUART handle pointer. |
| * @param count Receive bytes count. |
| * @retval kStatus_NoTransferInProgress No receive in progress. |
| * @retval kStatus_InvalidArgument Parameter is invalid. |
| * @retval kStatus_Success Get successfully through the parameter \p count; |
| */ |
| status_t LPUART_TransferGetReceiveCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count); |
| |
| /*@}*/ |
| |
| #if defined(__cplusplus) |
| } |
| #endif |
| |
| /*! @}*/ |
| |
| #endif /* _FSL_LPUART_EDMA_H_ */ |