/* * Copyright (c) 2015, Freescale Semiconductor, Inc. * Copyright 2016-2017 NXP * All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #ifndef _FSL_LPUART_EDMA_H_ #define _FSL_LPUART_EDMA_H_ #include "fsl_lpuart.h" #include "fsl_edma.h" /*! * @addtogroup lpuart_edma_driver * @{ */ /******************************************************************************* * Definitions ******************************************************************************/ /*! @name Driver version */ /*@{*/ /*! @brief LPUART EDMA driver version 2.2.6. */ #define FSL_LPUART_EDMA_DRIVER_VERSION (MAKE_VERSION(2, 2, 6)) /*@}*/ /* 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. */ uint8_t nbytes; /*!< eDMA minor byte transfer count initially configured. */ 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, see #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 Gets the number of bytes written to the LPUART TX register. * * This function gets the number of bytes written to the 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 Gets the number of received bytes. * * This function gets the number of received bytes. * * @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_ */