diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/atsam/libraries/libchip/source/usart_dma.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/atsam/libraries/libchip/source/usart_dma.c | 600 |
1 files changed, 0 insertions, 600 deletions
diff --git a/c/src/lib/libbsp/arm/atsam/libraries/libchip/source/usart_dma.c b/c/src/lib/libbsp/arm/atsam/libraries/libchip/source/usart_dma.c deleted file mode 100644 index 51488e6bce..0000000000 --- a/c/src/lib/libbsp/arm/atsam/libraries/libchip/source/usart_dma.c +++ /dev/null @@ -1,600 +0,0 @@ -/* ---------------------------------------------------------------------------- */ -/* Atmel Microcontroller Software Support */ -/* SAM Software Package License */ -/* ---------------------------------------------------------------------------- */ -/* Copyright (c) 2015, Atmel Corporation */ -/* */ -/* All rights reserved. */ -/* */ -/* Redistribution and use in source and binary forms, with or without */ -/* modification, are permitted provided that the following condition is met: */ -/* */ -/* - Redistributions of source code must retain the above copyright notice, */ -/* this list of conditions and the disclaimer below. */ -/* */ -/* Atmel's name may not be used to endorse or promote products derived from */ -/* this software without specific prior written permission. */ -/* */ -/* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR */ -/* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ -/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE */ -/* DISCLAIMED. IN NO EVENT SHALL ATMEL 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. */ -/* ---------------------------------------------------------------------------- */ - -/** -* \addtogroup usart_dma_module USART xDMA driver -* \section Usage -* -* <ul> -* <li> USARTD_Configure() initializes and configures the USART peripheral -* and xDMA for data transfer.</li> -* <li> Configures the parameters for the device corresponding to the cs -* value by USARTD_ConfigureCS(). </li> -* </ul> -* -*/ - -/** - * \file - * - * Implementation for the USART with xDMA driver. - * - */ - -/*---------------------------------------------------------------------------- - * Headers - *----------------------------------------------------------------------------*/ - -#include "chip.h" -#include "string.h" -#include "stdlib.h" - -/*---------------------------------------------------------------------------- - * Local functions - *----------------------------------------------------------------------------*/ - -/** - * \brief USART xDMA Rx callback - * Invoked on USART DMA reception done. - * \param channel DMA channel. - * \param pArg Pointer to callback argument - Pointer to USARTDma instance. - */ -static void USARTD_Rx_Cb(uint32_t channel, UsartDma *pArg) -{ - - UsartChannel *pUsartdCh = pArg->pRxChannel; - - if (channel != pUsartdCh->ChNum) - return; - - /* Release the DMA channels */ - XDMAD_FreeChannel(pArg->pXdmad, pUsartdCh->ChNum); - pUsartdCh->dmaProgress = 1; - SCB_InvalidateDCache_by_Addr((uint32_t *)pUsartdCh->pBuff, pUsartdCh->BuffSize); - -} - -/** - * \brief USART xDMA Rx callback - * Invoked on USART DMA reception done. - * \param channel DMA channel. - * \param pArg Pointer to callback argument - Pointer to USARTDma instance. - */ -static void USARTD_Tx_Cb(uint32_t channel, UsartDma *pArg) -{ - UsartChannel *pUsartdCh = pArg->pTxChannel; - - if (channel != pUsartdCh->ChNum) - return; - - /* Release the DMA channels */ - XDMAD_FreeChannel(pArg->pXdmad, pUsartdCh->ChNum); - - pUsartdCh->dmaProgress = 1; -} - -/** - * \brief Configure the USART Rx DMA Destination with Linker List mode. - * - * \param UsartChannel Pointer to USART dma channel - * \returns 0 if the dma multibuffer configuration successfully; otherwise - * returnsUSARTD_ERROR_XXX. - */ -static uint8_t _configureRxDma(UsartDma *pUsart, UsartChannel *pUsartRx) -{ - sXdmadCfg xdmadRxCfg; - uint32_t xdmaCndc, xdmaInt; - uint32_t i, LLI_Size; - Usart *pUsartHwRx = pUsart->pUsartHw; - sXdmad *pXdmadRx = pUsart->pXdmad; - uint8_t *pBuff = 0; - - - /* Setup RX Single block */ - if (pUsartRx->dmaProgrammingMode < XDMAD_LLI) { - xdmadRxCfg.mbr_ubc = pUsartRx->BuffSize; - xdmadRxCfg.mbr_da = (uint32_t)pUsartRx->pBuff; - - xdmadRxCfg.mbr_sa = (uint32_t)&pUsartHwRx->US_RHR; - xdmadRxCfg.mbr_cfg = XDMAC_CC_TYPE_PER_TRAN | - XDMAC_CC_MBSIZE_SIXTEEN | - XDMAC_CC_DSYNC_PER2MEM | - XDMAC_CC_CSIZE_CHK_1 | - XDMAC_CC_DWIDTH_BYTE | - XDMAC_CC_SIF_AHB_IF1 | - XDMAC_CC_DIF_AHB_IF1 | - XDMAC_CC_SAM_FIXED_AM | - XDMAC_CC_DAM_INCREMENTED_AM | - XDMAC_CC_PERID(XDMAIF_Get_ChannelNumber - (pUsart->usartId, XDMAD_TRANSFER_RX)); - - xdmadRxCfg.mbr_bc = 0; - - if (pUsartRx->dmaProgrammingMode == XDMAD_MULTI) - xdmadRxCfg.mbr_bc = pUsartRx->dmaBlockSize; - - xdmadRxCfg.mbr_sus = 0; - xdmadRxCfg.mbr_dus = 0; - xdmaCndc = 0; - xdmaInt = (XDMAC_CIE_BIE | - XDMAC_CIE_DIE | - XDMAC_CIE_FIE | - XDMAC_CIE_RBIE | - XDMAC_CIE_WBIE | - XDMAC_CIE_ROIE); - } else if (pUsartRx->dmaProgrammingMode == XDMAD_LLI) { - - /* Setup RX Link List */ - LLI_Size = pUsartRx->dmaBlockSize; - pBuff = pUsartRx->pBuff; - - if (pUsartRx->pLLIview != NULL) { - free(pUsartRx->pLLIview); - pUsartRx->pLLIview = NULL; - } - - pUsartRx->pLLIview = malloc(sizeof(LinkedListDescriporView1) * LLI_Size); - - if (pUsartRx->pLLIview == NULL) { - TRACE_ERROR(" Can not allocate memory to Rx LLI"); - return USARTD_ERROR; - } - - xdmadRxCfg.mbr_cfg = XDMAC_CC_TYPE_PER_TRAN | - XDMAC_CC_MBSIZE_SIXTEEN | - XDMAC_CC_DSYNC_PER2MEM | - XDMAC_CC_MEMSET_NORMAL_MODE | - XDMAC_CC_CSIZE_CHK_1 | - XDMAC_CC_DWIDTH_BYTE | - XDMAC_CC_SIF_AHB_IF1 | - XDMAC_CC_DIF_AHB_IF1 | - XDMAC_CC_SAM_FIXED_AM | - XDMAC_CC_DAM_INCREMENTED_AM | - XDMAC_CC_PERID(XDMAIF_Get_ChannelNumber - (pUsart->usartId, XDMAD_TRANSFER_RX)); - xdmadRxCfg.mbr_bc = 0; - - for (i = 0; i < LLI_Size; i++) { - pUsartRx->pLLIview[i].mbr_ubc = XDMA_UBC_NVIEW_NDV1 | - XDMA_UBC_NSEN_UNCHANGED | - XDMA_UBC_NDEN_UPDATED | - ((i == LLI_Size - 1) ? ( - (pUsartRx->dmaRingBuffer) ? - XDMA_UBC_NDE_FETCH_EN : 0) : - XDMA_UBC_NDE_FETCH_EN) | - pUsartRx->BuffSize; - pUsartRx->pLLIview[i].mbr_sa = (uint32_t)&pUsartHwRx->US_RHR; - pUsartRx->pLLIview[i].mbr_da = (uint32_t)pBuff; - pUsartRx->pLLIview[i].mbr_nda = (i == (LLI_Size - 1)) ? - ((pUsartRx->dmaRingBuffer) ? (uint32_t)pUsartRx->pLLIview : 0) - : (uint32_t)&pUsartRx->pLLIview[ i + 1 ]; - pBuff += pUsartRx->BuffSize; - } - - SCB_CleanDCache_by_Addr((uint32_t *)(pUsartRx->pLLIview), - sizeof(LinkedListDescriporView1)*LLI_Size); - xdmaCndc = XDMAC_CNDC_NDVIEW_NDV1 | - XDMAC_CNDC_NDE_DSCR_FETCH_EN | - XDMAC_CNDC_NDSUP_SRC_PARAMS_UPDATED | - XDMAC_CNDC_NDDUP_DST_PARAMS_UPDATED; - xdmaInt = ((pUsartRx->dmaRingBuffer) ? XDMAC_CIE_BIE : XDMAC_CIE_LIE); - } else - return 1; - - if (XDMAD_ConfigureTransfer( - pXdmadRx, pUsartRx->ChNum, &xdmadRxCfg, xdmaCndc, - (uint32_t)pUsartRx->pLLIview, xdmaInt)) - return USARTD_ERROR; - - return 0; -} - -/** - * \brief Configure the USART tx DMA source with Linker List mode. - * - * \param UsartChannel Pointer to USART dma channel - * \returns 0 if the dma multibuffer configuration successfully; otherwise returns - * USARTD_ERROR_XXX. - */ -static uint8_t _configureTxDma(UsartDma *pUsart, UsartChannel *pUsartTx) -{ - sXdmadCfg xdmadTxCfg; - uint32_t xdmaCndc, xdmaInt, LLI_Size, i; - uint8_t *pBuff = 0; - Usart *pUsartHwTx = pUsart->pUsartHw; - sXdmad *pXdmadTx = pUsart->pXdmad; - - /* Setup TX Link List */ - - if (pUsartTx->dmaProgrammingMode < XDMAD_LLI) { - /* Number of Data */ - xdmadTxCfg.mbr_ubc = pUsartTx->BuffSize; - /* Source and Destination address of DMA */ - xdmadTxCfg.mbr_sa = (uint32_t)pUsartTx->pBuff; - xdmadTxCfg.mbr_da = (uint32_t)&pUsartHwTx->US_THR; - /* DMA Channel configuration */ - xdmadTxCfg.mbr_cfg = XDMAC_CC_TYPE_PER_TRAN | - XDMAC_CC_MBSIZE_SIXTEEN | - XDMAC_CC_DSYNC_MEM2PER | - XDMAC_CC_CSIZE_CHK_1 | - XDMAC_CC_DWIDTH_BYTE | - XDMAC_CC_SIF_AHB_IF1 | - XDMAC_CC_DIF_AHB_IF1 | - XDMAC_CC_SAM_INCREMENTED_AM | - XDMAC_CC_DAM_FIXED_AM | - XDMAC_CC_PERID(XDMAIF_Get_ChannelNumber - (pUsart->usartId, XDMAD_TRANSFER_TX)); - - xdmadTxCfg.mbr_bc = 0; - - if (pUsartTx->dmaProgrammingMode == XDMAD_MULTI) - xdmadTxCfg.mbr_bc = pUsartTx->dmaBlockSize; - - xdmadTxCfg.mbr_sus = 0; - xdmadTxCfg.mbr_dus = 0; - xdmadTxCfg.mbr_ds = 0; - xdmaCndc = 0; - /* Enable End of Block; Read Bus error; Write Bus Error; - Overflow Error interrupt */ - xdmaInt = (XDMAC_CIE_BIE | - XDMAC_CIE_RBIE | - XDMAC_CIE_WBIE | - XDMAC_CIE_ROIE); - } else if (pUsartTx->dmaProgrammingMode == XDMAD_LLI) { - LLI_Size = pUsartTx->dmaBlockSize; - pBuff = pUsartTx->pBuff; - - /* If channel's LLI is already configured and application - want to reconfigured it, free before re-allocating memory */ - if (pUsartTx->pLLIview != NULL) { - free(pUsartTx->pLLIview); - pUsartTx->pLLIview = NULL; - } - - pUsartTx->pLLIview = malloc(sizeof(LinkedListDescriporView1) * LLI_Size); - - if (pUsartTx->pLLIview == NULL) { - TRACE_ERROR(" Can not allocate memory to Tx LLI"); - return USARTD_ERROR; - } - - xdmadTxCfg.mbr_cfg = XDMAC_CC_TYPE_PER_TRAN | - XDMAC_CC_MBSIZE_SIXTEEN | - XDMAC_CC_DSYNC_MEM2PER | - XDMAC_CC_MEMSET_NORMAL_MODE | - XDMAC_CC_CSIZE_CHK_1 | - XDMAC_CC_DWIDTH_BYTE | - XDMAC_CC_SIF_AHB_IF1 | - XDMAC_CC_DIF_AHB_IF1 | - XDMAC_CC_SAM_INCREMENTED_AM | - XDMAC_CC_DAM_FIXED_AM | - XDMAC_CC_PERID(XDMAIF_Get_ChannelNumber - (pUsart->usartId, XDMAD_TRANSFER_TX)); - xdmadTxCfg.mbr_bc = 0; - - for (i = 0; i < LLI_Size; i++) { - pUsartTx->pLLIview[i].mbr_ubc = XDMA_UBC_NVIEW_NDV1 | - XDMA_UBC_NSEN_UPDATED | - XDMA_UBC_NDEN_UNCHANGED | - ((i == LLI_Size - 1) ? ((pUsartTx->dmaRingBuffer) - ? XDMA_UBC_NDE_FETCH_EN : 0) : - XDMA_UBC_NDE_FETCH_EN) | pUsartTx->BuffSize; - pUsartTx->pLLIview[i].mbr_sa = (uint32_t)pBuff; - pUsartTx->pLLIview[i].mbr_da = (uint32_t)&pUsartHwTx->US_THR; - pUsartTx->pLLIview[i].mbr_nda = (i == (LLI_Size - 1)) ? - ((pUsartTx->dmaRingBuffer) ? (uint32_t)pUsartTx->pLLIview : 0) - : (uint32_t)&pUsartTx->pLLIview[ i + 1 ]; - pBuff += pUsartTx->BuffSize; - } - - SCB_CleanDCache_by_Addr((uint32_t *)(pUsartTx->pLLIview), - sizeof(LinkedListDescriporView1)*LLI_Size); - xdmaCndc = XDMAC_CNDC_NDVIEW_NDV1 | - XDMAC_CNDC_NDE_DSCR_FETCH_EN | - XDMAC_CNDC_NDSUP_SRC_PARAMS_UPDATED | - XDMAC_CNDC_NDDUP_DST_PARAMS_UPDATED; - xdmaInt = ((pUsartTx->dmaRingBuffer) ? XDMAC_CIE_BIE : XDMAC_CIE_LIE); - } else { - TRACE_ERROR("DmaProgState is incorrect \n\r"); - return 1; - } - - if (XDMAD_ConfigureTransfer(pXdmadTx, pUsartTx->ChNum, - &xdmadTxCfg, xdmaCndc, (uint32_t)pUsartTx->pLLIview, xdmaInt)) - return USARTD_ERROR; - - return 0; -} - -/*---------------------------------------------------------------------------- - * Exported functions - *----------------------------------------------------------------------------*/ -/** - * \brief Initializes the USARTDma structure and the corresponding USART & DMA . - * hardware select value. - * The driver will uses DMA channel 0 for RX and DMA channel 1 for TX. - * The DMA channels are freed automatically when no USART command processing. - * - * \param pUSARTD Pointer to a UsartDma instance. - * \param pUsartHw Associated USART peripheral. - * \param usartId USART peripheral identifier. - * \param UsartClk USART clock. - * \param pXdmad Pointer to a Dmad instance. - */ -uint32_t USARTD_Configure(UsartDma *pUsartd , - uint8_t usartId, - uint32_t UsartMode, - uint32_t BaudRate, - uint32_t UsartClk) -{ - /* Enable the peripheral clock in the PMC*/ - PMC_EnablePeripheral(usartId); - - /* Initialize the USART structure */ - pUsartd->usartId = usartId; - - if (usartId == ID_USART0) - pUsartd->pUsartHw = USART0; - - if (usartId == ID_USART1) - pUsartd->pUsartHw = USART1; - - if (usartId == ID_USART2) - pUsartd->pUsartHw = USART2; - - - /* Enable the USART Peripheral ,Execute a software reset of the USART, - Configure USART in Master Mode*/ - USART_Configure (pUsartd->pUsartHw, UsartMode, BaudRate, UsartClk); - - /* Check if DMA IRQ is enable; if not clear pending IRQs in init it */ - if (!(NVIC_GetActive(XDMAC_IRQn))) - NVIC_ClearPendingIRQ(XDMAC_IRQn); - - return 0; -} - -/** - * \brief This function initialize the appropriate DMA channel for Rx channel - * of USART - * \param pUsartd Pointer to a UsartDma instance. - * \param pRxCh Pointer to TxChannel configuration - * \returns 0 if the transfer has been started successfully; - * otherwise returns USARTD_ERROR_LOCK is the driver is in use, or - * USARTD_ERROR if the command is not valid. - */ -uint32_t USARTD_EnableRxChannels(UsartDma *pUsartd, UsartChannel *pRxCh) -{ - uint32_t Channel; - - assert(pRxCh); - /* Init USART Rx Channel. */ - pUsartd->pRxChannel = pRxCh; - - /* Enables the USART to receive data. */ - USART_SetReceiverEnabled (pUsartd->pUsartHw , ENABLE); - - - /* Allocate a DMA channel for USART0/1 RX. */ - Channel = XDMAD_AllocateChannel(pUsartd->pXdmad, pUsartd->usartId, - XDMAD_TRANSFER_MEMORY); - - if (Channel == XDMAD_ALLOC_FAILED) - return USARTD_ERROR; - - pRxCh->ChNum = Channel; - - /* Setup callbacks for USART RX */ - if (pUsartd->pRxChannel->callback) { - XDMAD_SetCallback(pUsartd->pXdmad, pRxCh->ChNum, - (XdmadTransferCallback)pRxCh->callback, pRxCh->pArgument); - } else { - XDMAD_SetCallback(pUsartd->pXdmad, pRxCh->ChNum, - (XdmadTransferCallback)USARTD_Rx_Cb, pUsartd); - } - - - if (XDMAD_PrepareChannel(pUsartd->pXdmad, pRxCh->ChNum)) - return USARTD_ERROR; - - if (_configureRxDma(pUsartd , pUsartd->pRxChannel)) - return USARTD_ERROR_LOCK; - - /* Check if DMA IRQ is enable; if not Enable it */ - if (!(NVIC_GetActive(XDMAC_IRQn))) { - /* Enable interrupt */ - NVIC_EnableIRQ(XDMAC_IRQn); - } - - return 0; -} - -/** - * \brief This function initialize the appropriate DMA channel for Tx channel - * of USART - * \param pUsartd Pointer to a USARTDma instance. - * \param pTxCh Pointer to TxChannel configuration - * \returns 0 if the transfer has been started successfully; - * otherwise returns USARTD_ERROR_LOCK is the driver is in use, or - * USARTD_ERROR if the command is not valid. - */ -uint32_t USARTD_EnableTxChannels(UsartDma *pUsartd, UsartChannel *pTxCh) -{ - - uint32_t Channel; - - assert(pTxCh); - - /* Init USART Tx Channel. */ - pUsartd->pTxChannel = pTxCh; - - /* Enables the USART to transfer data. */ - USART_SetTransmitterEnabled (pUsartd->pUsartHw , ENABLE); - - /* Allocate a DMA channel for USART0/1 TX. */ - Channel = XDMAD_AllocateChannel(pUsartd->pXdmad, XDMAD_TRANSFER_MEMORY, - pUsartd->usartId); - - if (Channel == XDMAD_ALLOC_FAILED) - return USARTD_ERROR; - - pTxCh->ChNum = Channel; - - /* Setup callbacks for USART0/1 TX */ - if (pUsartd->pTxChannel->callback) { - XDMAD_SetCallback(pUsartd->pXdmad, pTxCh->ChNum, - (XdmadTransferCallback)pTxCh->callback, pTxCh->pArgument); - } else - XDMAD_SetCallback(pUsartd->pXdmad, pTxCh->ChNum, - (XdmadTransferCallback)USARTD_Tx_Cb, pUsartd); - - if (XDMAD_PrepareChannel(pUsartd->pXdmad, pTxCh->ChNum)) - return USARTD_ERROR; - - if (_configureTxDma(pUsartd , pUsartd->pTxChannel)) - return USARTD_ERROR_LOCK; - - /* Check if DMA IRQ is enable; if not Enable it */ - if (!(NVIC_GetActive(XDMAC_IRQn))) { - /* Enable interrupt */ - NVIC_EnableIRQ(XDMAC_IRQn); - } - - return 0; -} - -/** - * \brief This function disables the appropriate DMA channel for Rx channel of - * USART - * \param pUsartd Pointer to a UsartDma instance. - * \param pRxCh Pointer to TxChannel configuration - * \returns 0 if the transfer has been started successfully; - * otherwise returns USARTD_ERROR_LOCK is the driver is in use, or - * USARTD_ERROR if the command is not valid. - */ -uint32_t USARTD_DisableRxChannels(UsartDma *pUsartd, UsartChannel *pRxCh) -{ - assert(pRxCh); - - /* Enables the USART to transfer data. */ - USART_SetReceiverEnabled (pUsartd->pUsartHw , DISABLE); - - XDMAD_StopTransfer(pUsartd->pXdmad, pRxCh->ChNum); - - XDMAD_SetCallback(pUsartd->pXdmad, pRxCh->ChNum, NULL, NULL); - - /* Free allocated DMA channel for USART TX. */ - if (XDMAD_FreeChannel(pUsartd->pXdmad, pRxCh->ChNum) != XDMAD_OK) - return USARTD_ERROR; - - if (pRxCh->dmaProgrammingMode == XDMAD_LLI) { - free(pRxCh->pLLIview); - pRxCh->pLLIview = NULL; - } - - pRxCh->dmaProgress = 1; - return 0; -} - -/** - * \brief This function disables the appropriate DMA channel for Tx channel of - * USART - * \param pUsartd Pointer to a USARTDma instance. - * \param pTxCh Pointer to TxChannel configuration - * \returns 0 if the transfer has been started successfully; - * otherwise returns USARTD_ERROR_LOCK is the driver is in use, or - * USARTD_ERROR if the command is not valid. - */ - -uint32_t USARTD_DisableTxChannels(UsartDma *pUsartd, UsartChannel *pTxCh) -{ - assert(pTxCh); - - /* Enables the USART to transfer data. */ - USART_SetTransmitterEnabled (pUsartd->pUsartHw , DISABLE); - - XDMAD_StopTransfer(pUsartd->pXdmad, pTxCh->ChNum); - - XDMAD_SetCallback(pUsartd->pXdmad, pTxCh->ChNum, NULL, NULL); - - /* Free allocated DMA channel for USART TX. */ - if (XDMAD_FreeChannel(pUsartd->pXdmad, pTxCh->ChNum) != XDMAD_OK) - return USARTD_ERROR; - - if (pTxCh->dmaProgrammingMode == XDMAD_LLI) { - free(pTxCh->pLLIview); - pTxCh->pLLIview = NULL; - } - - pTxCh->dmaProgress = 1; - return 0; -} - -/** - * \brief Starts a USART master transfer. This is a non blocking function. It - * will return as soon as the transfer is started. - * - * \param pUSARTD Pointer to a USARTDma instance. - * \returns 0 if the transfer has been started successfully; otherwise returns - * USARTD_ERROR_LOCK is the driver is in use, or USARTD_ERROR if the command is - * not valid. - */ -uint32_t USARTD_SendData(UsartDma *pUsartd) -{ - /* Start DMA 0(RX) && 1(TX) */ - pUsartd->pTxChannel->dmaProgress = 0; - SCB_CleanDCache_by_Addr((uint32_t *)pUsartd->pTxChannel->pBuff, - pUsartd->pTxChannel->BuffSize); - - if (XDMAD_StartTransfer(pUsartd->pXdmad, pUsartd->pTxChannel->ChNum)) - return USARTD_ERROR_LOCK; - - return 0; -} - -/** - * \brief Starts a USART master transfer. This is a non blocking function. It will - * return as soon as the transfer is started. - * - * \param pUSARTD Pointer to a USARTDma instance. - * \returns 0 if the transfer has been started successfully; otherwise returns - * USARTD_ERROR_LOCK is the driver is in use, or USARTD_ERROR if the command is not - * valid. - */ -uint32_t USARTD_RcvData(UsartDma *pUsartd) -{ - /* Start DMA 0(RX) && 1(TX) */ - pUsartd->pRxChannel->dmaProgress = 0; - - if (XDMAD_StartTransfer(pUsartd->pXdmad, pUsartd->pRxChannel->ChNum)) - return USARTD_ERROR_LOCK; - - return 0; -} - |