380 lines
12 KiB
C
380 lines
12 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2015, Freescale Semiconductor, Inc.
|
||
|
|
* Copyright 2016-2017 NXP
|
||
|
|
*
|
||
|
|
* 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 the copyright holder 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "fsl_lpuart_edma.h"
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
* Definitions
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/*<! Structure definition for lpuart_edma_private_handle_t. The structure is private. */
|
||
|
|
typedef struct _lpuart_edma_private_handle
|
||
|
|
{
|
||
|
|
LPUART_Type *base;
|
||
|
|
lpuart_edma_handle_t *handle;
|
||
|
|
} lpuart_edma_private_handle_t;
|
||
|
|
|
||
|
|
/* LPUART EDMA transfer handle. */
|
||
|
|
enum _lpuart_edma_tansfer_states
|
||
|
|
{
|
||
|
|
kLPUART_TxIdle, /* TX idle. */
|
||
|
|
kLPUART_TxBusy, /* TX busy. */
|
||
|
|
kLPUART_RxIdle, /* RX idle. */
|
||
|
|
kLPUART_RxBusy /* RX busy. */
|
||
|
|
};
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
* Definitions
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/* Array of LPUART handle. */
|
||
|
|
#if (defined(LPUART8))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 9
|
||
|
|
#else /* LPUART8 */
|
||
|
|
#if (defined(LPUART7))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 8
|
||
|
|
#else /* LPUART7 */
|
||
|
|
#if (defined(LPUART6))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 7
|
||
|
|
#else /* LPUART6 */
|
||
|
|
#if (defined(LPUART5))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 6
|
||
|
|
#else /* LPUART5 */
|
||
|
|
#if (defined(LPUART4))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 5
|
||
|
|
#else /* LPUART4 */
|
||
|
|
#if (defined(LPUART3))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 4
|
||
|
|
#else /* LPUART3 */
|
||
|
|
#if (defined(LPUART2))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 3
|
||
|
|
#else /* LPUART2 */
|
||
|
|
#if (defined(LPUART1))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 2
|
||
|
|
#else /* LPUART1 */
|
||
|
|
#if (defined(LPUART0))
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE 1
|
||
|
|
#else /* LPUART0 */
|
||
|
|
#define LPUART_HANDLE_ARRAY_SIZE FSL_FEATURE_SOC_LPUART_COUNT
|
||
|
|
#endif /* LPUART 0 */
|
||
|
|
#endif /* LPUART 1 */
|
||
|
|
#endif /* LPUART 2 */
|
||
|
|
#endif /* LPUART 3 */
|
||
|
|
#endif /* LPUART 4 */
|
||
|
|
#endif /* LPUART 5 */
|
||
|
|
#endif /* LPUART 6 */
|
||
|
|
#endif /* LPUART 7 */
|
||
|
|
#endif /* LPUART 8 */
|
||
|
|
|
||
|
|
/*<! Private handle only used for internally. */
|
||
|
|
static lpuart_edma_private_handle_t s_edmaPrivateHandle[LPUART_HANDLE_ARRAY_SIZE];
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
* Prototypes
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief LPUART EDMA send finished callback function.
|
||
|
|
*
|
||
|
|
* This function is called when LPUART EDMA send finished. It disables the LPUART
|
||
|
|
* TX EDMA request and sends @ref kStatus_LPUART_TxIdle to LPUART callback.
|
||
|
|
*
|
||
|
|
* @param handle The EDMA handle.
|
||
|
|
* @param param Callback function parameter.
|
||
|
|
*/
|
||
|
|
static void LPUART_SendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief LPUART EDMA receive finished callback function.
|
||
|
|
*
|
||
|
|
* This function is called when LPUART EDMA receive finished. It disables the LPUART
|
||
|
|
* RX EDMA request and sends @ref kStatus_LPUART_RxIdle to LPUART callback.
|
||
|
|
*
|
||
|
|
* @param handle The EDMA handle.
|
||
|
|
* @param param Callback function parameter.
|
||
|
|
*/
|
||
|
|
static void LPUART_ReceiveEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* @brief Get the LPUART instance from peripheral base address.
|
||
|
|
*
|
||
|
|
* @param base LPUART peripheral base address.
|
||
|
|
* @return LPUART instance.
|
||
|
|
*/
|
||
|
|
extern uint32_t LPUART_GetInstance(LPUART_Type *base);
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
* Code
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
static void LPUART_SendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
|
||
|
|
{
|
||
|
|
assert(param);
|
||
|
|
|
||
|
|
lpuart_edma_private_handle_t *lpuartPrivateHandle = (lpuart_edma_private_handle_t *)param;
|
||
|
|
|
||
|
|
/* Avoid the warning for unused variables. */
|
||
|
|
handle = handle;
|
||
|
|
tcds = tcds;
|
||
|
|
|
||
|
|
if (transferDone)
|
||
|
|
{
|
||
|
|
LPUART_TransferAbortSendEDMA(lpuartPrivateHandle->base, lpuartPrivateHandle->handle);
|
||
|
|
|
||
|
|
if (lpuartPrivateHandle->handle->callback)
|
||
|
|
{
|
||
|
|
lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle,
|
||
|
|
kStatus_LPUART_TxIdle, lpuartPrivateHandle->handle->userData);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void LPUART_ReceiveEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
|
||
|
|
{
|
||
|
|
assert(param);
|
||
|
|
|
||
|
|
lpuart_edma_private_handle_t *lpuartPrivateHandle = (lpuart_edma_private_handle_t *)param;
|
||
|
|
|
||
|
|
/* Avoid warning for unused parameters. */
|
||
|
|
handle = handle;
|
||
|
|
tcds = tcds;
|
||
|
|
|
||
|
|
if (transferDone)
|
||
|
|
{
|
||
|
|
/* Disable transfer. */
|
||
|
|
LPUART_TransferAbortReceiveEDMA(lpuartPrivateHandle->base, lpuartPrivateHandle->handle);
|
||
|
|
|
||
|
|
if (lpuartPrivateHandle->handle->callback)
|
||
|
|
{
|
||
|
|
lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle,
|
||
|
|
kStatus_LPUART_RxIdle, lpuartPrivateHandle->handle->userData);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
|
||
|
|
uint32_t instance = LPUART_GetInstance(base);
|
||
|
|
|
||
|
|
s_edmaPrivateHandle[instance].base = base;
|
||
|
|
s_edmaPrivateHandle[instance].handle = handle;
|
||
|
|
|
||
|
|
memset(handle, 0, sizeof(*handle));
|
||
|
|
|
||
|
|
handle->rxState = kLPUART_RxIdle;
|
||
|
|
handle->txState = kLPUART_TxIdle;
|
||
|
|
|
||
|
|
handle->rxEdmaHandle = rxEdmaHandle;
|
||
|
|
handle->txEdmaHandle = txEdmaHandle;
|
||
|
|
|
||
|
|
handle->callback = callback;
|
||
|
|
handle->userData = userData;
|
||
|
|
|
||
|
|
#if defined(FSL_FEATURE_LPUART_HAS_FIFO) && FSL_FEATURE_LPUART_HAS_FIFO
|
||
|
|
/* Note:
|
||
|
|
Take care of the RX FIFO, EDMA request only assert when received bytes
|
||
|
|
equal or more than RX water mark, there is potential issue if RX water
|
||
|
|
mark larger than 1.
|
||
|
|
For example, if RX FIFO water mark is 2, upper layer needs 5 bytes and
|
||
|
|
5 bytes are received. the last byte will be saved in FIFO but not trigger
|
||
|
|
EDMA transfer because the water mark is 2.
|
||
|
|
*/
|
||
|
|
if (rxEdmaHandle)
|
||
|
|
{
|
||
|
|
base->WATER &= (~LPUART_WATER_RXWATER_MASK);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Configure TX. */
|
||
|
|
if (txEdmaHandle)
|
||
|
|
{
|
||
|
|
EDMA_SetCallback(handle->txEdmaHandle, LPUART_SendEDMACallback, &s_edmaPrivateHandle[instance]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Configure RX. */
|
||
|
|
if (rxEdmaHandle)
|
||
|
|
{
|
||
|
|
EDMA_SetCallback(handle->rxEdmaHandle, LPUART_ReceiveEDMACallback, &s_edmaPrivateHandle[instance]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
status_t LPUART_SendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
assert(handle->txEdmaHandle);
|
||
|
|
assert(xfer);
|
||
|
|
assert(xfer->data);
|
||
|
|
assert(xfer->dataSize);
|
||
|
|
|
||
|
|
edma_transfer_config_t xferConfig;
|
||
|
|
status_t status;
|
||
|
|
|
||
|
|
/* If previous TX not finished. */
|
||
|
|
if (kLPUART_TxBusy == handle->txState)
|
||
|
|
{
|
||
|
|
status = kStatus_LPUART_TxBusy;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
handle->txState = kLPUART_TxBusy;
|
||
|
|
handle->txDataSizeAll = xfer->dataSize;
|
||
|
|
|
||
|
|
/* Prepare transfer. */
|
||
|
|
EDMA_PrepareTransfer(&xferConfig, xfer->data, sizeof(uint8_t), (void *)LPUART_GetDataRegisterAddress(base),
|
||
|
|
sizeof(uint8_t), sizeof(uint8_t), xfer->dataSize, kEDMA_MemoryToPeripheral);
|
||
|
|
|
||
|
|
/* Store the initially configured eDMA minor byte transfer count into the LPUART handle */
|
||
|
|
handle->nbytes = sizeof(uint8_t);
|
||
|
|
|
||
|
|
/* Submit transfer. */
|
||
|
|
EDMA_SubmitTransfer(handle->txEdmaHandle, &xferConfig);
|
||
|
|
EDMA_StartTransfer(handle->txEdmaHandle);
|
||
|
|
|
||
|
|
/* Enable LPUART TX EDMA. */
|
||
|
|
LPUART_EnableTxDMA(base, true);
|
||
|
|
|
||
|
|
status = kStatus_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
status_t LPUART_ReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
assert(handle->rxEdmaHandle);
|
||
|
|
assert(xfer);
|
||
|
|
assert(xfer->data);
|
||
|
|
assert(xfer->dataSize);
|
||
|
|
|
||
|
|
edma_transfer_config_t xferConfig;
|
||
|
|
status_t status;
|
||
|
|
|
||
|
|
/* If previous RX not finished. */
|
||
|
|
if (kLPUART_RxBusy == handle->rxState)
|
||
|
|
{
|
||
|
|
status = kStatus_LPUART_RxBusy;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
handle->rxState = kLPUART_RxBusy;
|
||
|
|
handle->rxDataSizeAll = xfer->dataSize;
|
||
|
|
|
||
|
|
/* Prepare transfer. */
|
||
|
|
EDMA_PrepareTransfer(&xferConfig, (void *)LPUART_GetDataRegisterAddress(base), sizeof(uint8_t), xfer->data,
|
||
|
|
sizeof(uint8_t), sizeof(uint8_t), xfer->dataSize, kEDMA_PeripheralToMemory);
|
||
|
|
|
||
|
|
/* Store the initially configured eDMA minor byte transfer count into the LPUART handle */
|
||
|
|
handle->nbytes = sizeof(uint8_t);
|
||
|
|
|
||
|
|
/* Submit transfer. */
|
||
|
|
EDMA_SubmitTransfer(handle->rxEdmaHandle, &xferConfig);
|
||
|
|
EDMA_StartTransfer(handle->rxEdmaHandle);
|
||
|
|
|
||
|
|
/* Enable LPUART RX EDMA. */
|
||
|
|
LPUART_EnableRxDMA(base, true);
|
||
|
|
|
||
|
|
status = kStatus_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
void LPUART_TransferAbortSendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
assert(handle->txEdmaHandle);
|
||
|
|
|
||
|
|
/* Disable LPUART TX EDMA. */
|
||
|
|
LPUART_EnableTxDMA(base, false);
|
||
|
|
|
||
|
|
/* Stop transfer. */
|
||
|
|
EDMA_AbortTransfer(handle->txEdmaHandle);
|
||
|
|
|
||
|
|
handle->txState = kLPUART_TxIdle;
|
||
|
|
}
|
||
|
|
|
||
|
|
void LPUART_TransferAbortReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
assert(handle->rxEdmaHandle);
|
||
|
|
|
||
|
|
/* Disable LPUART RX EDMA. */
|
||
|
|
LPUART_EnableRxDMA(base, false);
|
||
|
|
|
||
|
|
/* Stop transfer. */
|
||
|
|
EDMA_AbortTransfer(handle->rxEdmaHandle);
|
||
|
|
|
||
|
|
handle->rxState = kLPUART_RxIdle;
|
||
|
|
}
|
||
|
|
|
||
|
|
status_t LPUART_TransferGetReceiveCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
assert(handle->rxEdmaHandle);
|
||
|
|
assert(count);
|
||
|
|
|
||
|
|
if (kLPUART_RxIdle == handle->rxState)
|
||
|
|
{
|
||
|
|
return kStatus_NoTransferInProgress;
|
||
|
|
}
|
||
|
|
|
||
|
|
*count = handle->rxDataSizeAll -
|
||
|
|
(uint32_t)handle->nbytes *
|
||
|
|
EDMA_GetRemainingMajorLoopCount(handle->rxEdmaHandle->base, handle->rxEdmaHandle->channel);
|
||
|
|
|
||
|
|
return kStatus_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
status_t LPUART_TransferGetSendCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count)
|
||
|
|
{
|
||
|
|
assert(handle);
|
||
|
|
assert(handle->txEdmaHandle);
|
||
|
|
assert(count);
|
||
|
|
|
||
|
|
if (kLPUART_TxIdle == handle->txState)
|
||
|
|
{
|
||
|
|
return kStatus_NoTransferInProgress;
|
||
|
|
}
|
||
|
|
|
||
|
|
*count = handle->txDataSizeAll -
|
||
|
|
(uint32_t)handle->nbytes *
|
||
|
|
EDMA_GetRemainingMajorLoopCount(handle->txEdmaHandle->base, handle->txEdmaHandle->channel);
|
||
|
|
|
||
|
|
return kStatus_Success;
|
||
|
|
}
|