mirror of https://github.com/ARMmbed/mbed-os.git
commit
816233cf5d
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/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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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 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 Freescale Semiconductor, Inc. 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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#include "fsl_flexcan_edma.h"
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#include "fsl_dmamux.h"
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/*******************************************************************************
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* Definitons
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******************************************************************************/
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/*<! Structure definition for flexcan_edma_private_handle_t. The structure is private. */
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typedef struct _flexcan_edma_private_handle
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{
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CAN_Type *base;
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flexcan_edma_handle_t *handle;
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} flexcan_edma_private_handle_t;
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/* FlexCAN EDMA transfer handle. */
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enum _flexcan_edma_tansfer_state
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{
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KFLEXCAN_RxFifoIdle = 0U, /* Rx Fifo idle. */
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KFLEXCAN_RxFifoBusy = 1U, /* Rx Fifo busy. */
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};
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/*******************************************************************************
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* Variables
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******************************************************************************/
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/*<! Private handle only used for internally. */
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static flexcan_edma_private_handle_t s_edmaPrivateHandle[FSL_FEATURE_SOC_FLEXCAN_COUNT];
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*!
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* @brief FlexCAN EDMA receive finished callback function.
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*
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* This function is called when FlexCAN Rx FIFO EDMA receive finished.
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* It disables the FlexCAN Rx FIFO EDMA request and sends
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* @ref kStatus_FLEXCAN_RxFifoIdle to FlexCAN EDMA callback.
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*
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* @param handle The EDMA handle.
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* @param param Callback function parameter.
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*/
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static void FLEXCAN_ReceiveFifoEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
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/*!
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* @brief Get the FlexCAN instance from peripheral base address.
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*
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* @param base FlexCAN peripheral base address.
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* @return FlexCAN instance.
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*/
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extern uint32_t FLEXCAN_GetInstance(CAN_Type *base);
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/*******************************************************************************
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* Code
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******************************************************************************/
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static void FLEXCAN_ReceiveFifoEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
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{
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handle = handle;
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tcds = tcds;
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flexcan_edma_private_handle_t *flexcanPrivateHandle = (flexcan_edma_private_handle_t *)param;
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if (transferDone)
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{
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/* Disable transfer. */
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FLEXCAN_TransferAbortReceiveFifoEDMA(flexcanPrivateHandle->base, flexcanPrivateHandle->handle);
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if (flexcanPrivateHandle->handle->callback)
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{
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flexcanPrivateHandle->handle->callback(flexcanPrivateHandle->base, flexcanPrivateHandle->handle,
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kStatus_FLEXCAN_RxFifoIdle, flexcanPrivateHandle->handle->userData);
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}
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}
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}
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void FLEXCAN_TransferCreateHandleEDMA(CAN_Type *base,
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flexcan_edma_handle_t *handle,
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flexcan_edma_transfer_callback_t callback,
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void *userData,
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edma_handle_t *rxFifoEdmaHandle)
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{
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assert(handle);
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uint32_t instance = FLEXCAN_GetInstance(base);
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s_edmaPrivateHandle[instance].base = base;
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s_edmaPrivateHandle[instance].handle = handle;
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memset(handle, 0, sizeof(flexcan_edma_handle_t));
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handle->rxFifoState = KFLEXCAN_RxFifoIdle;
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handle->rxFifoEdmaHandle = rxFifoEdmaHandle;
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/* Register Callback. */
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handle->callback = callback;
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handle->userData = userData;
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/* Configure Rx FIFO DMA. */
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EDMA_SetCallback(handle->rxFifoEdmaHandle, FLEXCAN_ReceiveFifoEDMACallback, &s_edmaPrivateHandle[instance]);
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}
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status_t FLEXCAN_TransferReceiveFifoEDMA(CAN_Type *base, flexcan_edma_handle_t *handle, flexcan_fifo_transfer_t *xfer)
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{
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assert(handle->rxFifoEdmaHandle);
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edma_transfer_config_t dmaXferConfig;
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status_t status;
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/* If previous Rx FIFO receive not finished. */
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if (KFLEXCAN_RxFifoBusy == handle->rxFifoState)
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{
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status = kStatus_FLEXCAN_RxFifoBusy;
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}
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else
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{
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handle->rxFifoState = KFLEXCAN_RxFifoBusy;
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/* Prepare transfer. */
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EDMA_PrepareTransfer(&dmaXferConfig, (void *)FLEXCAN_GetRxFifoHeadAddr(base), sizeof(flexcan_frame_t),
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(void *)xfer->frame, sizeof(uint32_t), sizeof(flexcan_frame_t), sizeof(flexcan_frame_t),
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kEDMA_PeripheralToMemory);
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/* Submit transfer. */
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EDMA_SubmitTransfer(handle->rxFifoEdmaHandle, &dmaXferConfig);
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EDMA_StartTransfer(handle->rxFifoEdmaHandle);
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/* Enable FlexCAN Rx FIFO EDMA. */
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FLEXCAN_EnableRxFifoDMA(base, true);
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status = kStatus_Success;
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}
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return status;
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}
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void FLEXCAN_TransferAbortReceiveFifoEDMA(CAN_Type *base, flexcan_edma_handle_t *handle)
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{
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assert(handle->rxFifoEdmaHandle);
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/* Disable FlexCAN Rx FIFO EDMA. */
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FLEXCAN_EnableRxFifoDMA(base, false);
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/* Stop transfer. */
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EDMA_AbortTransfer(handle->rxFifoEdmaHandle);
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handle->rxFifoState = KFLEXCAN_RxFifoIdle;
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}
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@ -1,128 +0,0 @@
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/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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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 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 Freescale Semiconductor, Inc. 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_FLEXCAN_EDMA_H_
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#define _FSL_FLEXCAN_EDMA_H_
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#include "fsl_flexcan.h"
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#include "fsl_dmamux.h"
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#include "fsl_edma.h"
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/*!
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* @addtogroup flexcan_edma_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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/* Forward declaration of the handle typedef. */
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typedef struct _flexcan_edma_handle flexcan_edma_handle_t;
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/*! @brief FlexCAN transfer callback function. */
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typedef void (*flexcan_edma_transfer_callback_t)(CAN_Type *base,
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flexcan_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 FlexCAN eDMA handle
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*/
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struct _flexcan_edma_handle
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{
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flexcan_edma_transfer_callback_t callback; /*!< Callback function. */
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void *userData; /*!< FlexCAN callback function parameter.*/
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edma_handle_t *rxFifoEdmaHandle; /*!< The EDMA Rx FIFO channel used. */
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volatile uint8_t rxFifoState; /*!< Rx FIFO 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 FlexCAN handle, which is used in transactional functions.
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*
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* @param base FlexCAN peripheral base address.
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* @param handle Pointer to flexcan_edma_handle_t structure.
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* @param callback The callback function.
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* @param userData The parameter of the callback function.
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* @param rxFifoEdmaHandle User-requested DMA handle for Rx FIFO DMA transfer.
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*/
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void FLEXCAN_TransferCreateHandleEDMA(CAN_Type *base,
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flexcan_edma_handle_t *handle,
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flexcan_edma_transfer_callback_t callback,
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void *userData,
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edma_handle_t *rxFifoEdmaHandle);
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/*!
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* @brief Receives the CAN Message from the Rx FIFO using eDMA.
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*
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* This function receives the CAN Message using eDMA. This is a non-blocking function, which returns
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* right away. After the CAN Message is received, the receive callback function is called.
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*
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* @param base FlexCAN peripheral base address.
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* @param handle Pointer to flexcan_edma_handle_t structure.
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* @param xfer FlexCAN Rx FIFO EDMA transfer structure, see #flexcan_fifo_transfer_t.
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* @retval kStatus_Success if succeed, others failed.
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* @retval kStatus_FLEXCAN_RxFifoBusy Previous transfer ongoing.
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*/
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status_t FLEXCAN_TransferReceiveFifoEDMA(CAN_Type *base, flexcan_edma_handle_t *handle, flexcan_fifo_transfer_t *xfer);
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/*!
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* @brief Aborts the receive process which used eDMA.
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*
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* This function aborts the receive process which used eDMA.
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*
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* @param base FlexCAN peripheral base address.
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* @param handle Pointer to flexcan_edma_handle_t structure.
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*/
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void FLEXCAN_TransferAbortReceiveFifoEDMA(CAN_Type *base, flexcan_edma_handle_t *handle);
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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_FLEXCAN_EDMA_H_ */
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