added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
Diff: targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_KL43Z/drivers/fsl_lpuart_dma.c
- Revision:
- 144:ef7eb2e8f9f7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_KL43Z/drivers/fsl_lpuart_dma.c Fri Sep 02 15:07:44 2016 +0100 @@ -0,0 +1,339 @@ +/* + * 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. + */ +#include "fsl_lpuart_dma.h" +#include "fsl_dmamux.h" + +/******************************************************************************* + * Definitions + ******************************************************************************/ + +/*<! Structure definition for lpuart_dma_handle_t. The structure is private. */ +typedef struct _lpuart_dma_private_handle +{ + LPUART_Type *base; + lpuart_dma_handle_t *handle; +} lpuart_dma_private_handle_t; + +/* LPUART DMA transfer handle. */ +enum _uart_dma_tansfer_states +{ + kLPUART_TxIdle, /* TX idle. */ + kLPUART_TxBusy, /* TX busy. */ + kLPUART_RxIdle, /* RX idle. */ + kLPUART_RxBusy /* RX busy. */ +}; + +/******************************************************************************* + * Variables + ******************************************************************************/ + +/*<! Private handle only used for internally. */ +static lpuart_dma_private_handle_t s_dmaPrivateHandle[FSL_FEATURE_SOC_LPUART_COUNT]; + +/******************************************************************************* + * Prototypes + ******************************************************************************/ + +/*! + * @brief LPUART DMA send finished callback function. + * + * This function is called when LPUART DMA send finished. It disables the LPUART + * TX DMA request and sends @ref kStatus_LPUART_TxIdle to LPUART callback. + * + * @param handle The DMA handle. + * @param param Callback function parameter. + */ +static void LPUART_TransferSendDMACallback(dma_handle_t *handle, void *param); + +/*! + * @brief LPUART DMA receive finished callback function. + * + * This function is called when LPUART DMA receive finished. It disables the LPUART + * RX DMA request and sends @ref kStatus_LPUART_RxIdle to LPUART callback. + * + * @param handle The DMA handle. + * @param param Callback function parameter. + */ +static void LPUART_TransferReceiveDMACallback(dma_handle_t *handle, void *param); + +/*! + * @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_TransferSendDMACallback(dma_handle_t *handle, void *param) +{ + lpuart_dma_private_handle_t *lpuartPrivateHandle = (lpuart_dma_private_handle_t *)param; + + /* Disable LPUART TX DMA. */ + LPUART_EnableTxDMA(lpuartPrivateHandle->base, false); + + /* Disable interrupt. */ + DMA_DisableInterrupts(lpuartPrivateHandle->handle->txDmaHandle->base, + lpuartPrivateHandle->handle->txDmaHandle->channel); + + lpuartPrivateHandle->handle->txState = kLPUART_TxIdle; + + if (lpuartPrivateHandle->handle->callback) + { + lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle, + kStatus_LPUART_TxIdle, lpuartPrivateHandle->handle->userData); + } +} + +static void LPUART_TransferReceiveDMACallback(dma_handle_t *handle, void *param) +{ + lpuart_dma_private_handle_t *lpuartPrivateHandle = (lpuart_dma_private_handle_t *)param; + + /* Disable LPUART RX DMA. */ + LPUART_EnableRxDMA(lpuartPrivateHandle->base, false); + + /* Disable interrupt. */ + DMA_DisableInterrupts(lpuartPrivateHandle->handle->rxDmaHandle->base, + lpuartPrivateHandle->handle->rxDmaHandle->channel); + + lpuartPrivateHandle->handle->rxState = kLPUART_RxIdle; + + if (lpuartPrivateHandle->handle->callback) + { + lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle, + kStatus_LPUART_RxIdle, lpuartPrivateHandle->handle->userData); + } +} + +void LPUART_TransferCreateHandleDMA(LPUART_Type *base, + lpuart_dma_handle_t *handle, + lpuart_dma_transfer_callback_t callback, + void *userData, + dma_handle_t *txDmaHandle, + dma_handle_t *rxDmaHandle) +{ + assert(handle); + + uint32_t instance = LPUART_GetInstance(base); + + memset(handle, 0, sizeof(lpuart_dma_handle_t)); + + s_dmaPrivateHandle[instance].base = base; + s_dmaPrivateHandle[instance].handle = handle; + + handle->rxState = kLPUART_RxIdle; + handle->txState = kLPUART_TxIdle; + + 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, DMA 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 + DMA transfer because the water mark is 2. + */ + if (rxDmaHandle) + { + base->WATER &= (~LPUART_WATER_RXWATER_MASK); + } +#endif + + handle->rxDmaHandle = rxDmaHandle; + handle->txDmaHandle = txDmaHandle; + + /* Configure TX. */ + if (txDmaHandle) + { + DMA_SetCallback(txDmaHandle, LPUART_TransferSendDMACallback, &s_dmaPrivateHandle[instance]); + } + + /* Configure RX. */ + if (rxDmaHandle) + { + DMA_SetCallback(rxDmaHandle, LPUART_TransferReceiveDMACallback, &s_dmaPrivateHandle[instance]); + } +} + +status_t LPUART_TransferSendDMA(LPUART_Type *base, lpuart_dma_handle_t *handle, lpuart_transfer_t *xfer) +{ + assert(handle->txDmaHandle); + + status_t status; + dma_transfer_config_t xferConfig; + + /* Return error if xfer invalid. */ + if ((0U == xfer->dataSize) || (NULL == xfer->data)) + { + return kStatus_InvalidArgument; + } + + /* 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. */ + DMA_PrepareTransfer(&xferConfig, xfer->data, sizeof(uint8_t), (void *)LPUART_GetDataRegisterAddress(base), + sizeof(uint8_t), xfer->dataSize, kDMA_MemoryToPeripheral); + + /* Submit transfer. */ + DMA_SubmitTransfer(handle->txDmaHandle, &xferConfig, kDMA_EnableInterrupt); + DMA_StartTransfer(handle->txDmaHandle); + + /* Enable LPUART TX DMA. */ + LPUART_EnableTxDMA(base, true); + + status = kStatus_Success; + } + + return status; +} + +status_t LPUART_TransferReceiveDMA(LPUART_Type *base, lpuart_dma_handle_t *handle, lpuart_transfer_t *xfer) +{ + assert(handle->rxDmaHandle); + + status_t status; + dma_transfer_config_t xferConfig; + + /* Return error if xfer invalid. */ + if ((0U == xfer->dataSize) || (NULL == xfer->data)) + { + return kStatus_InvalidArgument; + } + + /* 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. */ + DMA_PrepareTransfer(&xferConfig, (void *)LPUART_GetDataRegisterAddress(base), sizeof(uint8_t), xfer->data, + sizeof(uint8_t), xfer->dataSize, kDMA_PeripheralToMemory); + + /* Submit transfer. */ + DMA_SubmitTransfer(handle->rxDmaHandle, &xferConfig, kDMA_EnableInterrupt); + DMA_StartTransfer(handle->rxDmaHandle); + + /* Enable LPUART RX DMA. */ + LPUART_EnableRxDMA(base, true); + + status = kStatus_Success; + } + + return status; +} + +void LPUART_TransferAbortSendDMA(LPUART_Type *base, lpuart_dma_handle_t *handle) +{ + assert(handle->txDmaHandle); + + /* Disable LPUART TX DMA. */ + LPUART_EnableTxDMA(base, false); + + /* Stop transfer. */ + DMA_AbortTransfer(handle->txDmaHandle); + + /* Write DMA->DSR[DONE] to abort transfer and clear status. */ + DMA_ClearChannelStatusFlags(handle->txDmaHandle->base, handle->txDmaHandle->channel, kDMA_TransactionsDoneFlag); + + handle->txState = kLPUART_TxIdle; +} + +void LPUART_TransferAbortReceiveDMA(LPUART_Type *base, lpuart_dma_handle_t *handle) +{ + assert(handle->rxDmaHandle); + + /* Disable LPUART RX DMA. */ + LPUART_EnableRxDMA(base, false); + + /* Stop transfer. */ + DMA_AbortTransfer(handle->rxDmaHandle); + + /* Write DMA->DSR[DONE] to abort transfer and clear status. */ + DMA_ClearChannelStatusFlags(handle->rxDmaHandle->base, handle->rxDmaHandle->channel, kDMA_TransactionsDoneFlag); + + handle->rxState = kLPUART_RxIdle; +} + +status_t LPUART_TransferGetSendCountDMA(LPUART_Type *base, lpuart_dma_handle_t *handle, uint32_t *count) +{ + assert(handle->txDmaHandle); + + if (kLPUART_TxIdle == handle->txState) + { + return kStatus_NoTransferInProgress; + } + + if (!count) + { + return kStatus_InvalidArgument; + } + + *count = handle->txDataSizeAll - DMA_GetRemainingBytes(handle->txDmaHandle->base, handle->txDmaHandle->channel); + + return kStatus_Success; +} + +status_t LPUART_TransferGetReceiveCountDMA(LPUART_Type *base, lpuart_dma_handle_t *handle, uint32_t *count) +{ + assert(handle->rxDmaHandle); + + if (kLPUART_RxIdle == handle->rxState) + { + return kStatus_NoTransferInProgress; + } + + if (!count) + { + return kStatus_InvalidArgument; + } + + *count = handle->rxDataSizeAll - DMA_GetRemainingBytes(handle->rxDmaHandle->base, handle->rxDmaHandle->channel); + + return kStatus_Success; +}