diff options
Diffstat (limited to 'bsps/arm/atsam/include/libchip/include/uart_dma.h')
-rw-r--r-- | bsps/arm/atsam/include/libchip/include/uart_dma.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/bsps/arm/atsam/include/libchip/include/uart_dma.h b/bsps/arm/atsam/include/libchip/include/uart_dma.h new file mode 100644 index 0000000000..8329b6b930 --- /dev/null +++ b/bsps/arm/atsam/include/libchip/include/uart_dma.h @@ -0,0 +1,137 @@ +/* ---------------------------------------------------------------------------- */ +/* 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. */ +/* ---------------------------------------------------------------------------- */ + +/** + * \file + * + * Implementation of UART driver, transfer data through DMA. + * + */ + +#ifndef _UART_DMA_ +#define _UART_DMA_ + +/*---------------------------------------------------------------------------- + * Headers + *----------------------------------------------------------------------------*/ + +#include "chip.h" + +/*---------------------------------------------------------------------------- + * Definitions + *----------------------------------------------------------------------------*/ + +/** An unspecified error has occurred.*/ +#define UARTD_ERROR 1 + +/** UART driver is currently in use.*/ +#define UARTD_ERROR_LOCK 2 + + +#ifdef __cplusplus +extern "C" { +#endif + +/*---------------------------------------------------------------------------- + * Types + *----------------------------------------------------------------------------*/ + +/** UART transfer complete callback. */ +typedef void (*UartdCallback)(uint8_t, void *); + +/** \brief usart Transfer Request prepared by the application upper layer. + * + * This structure is sent to the UART_Send or UART_Rcv to start the transfer. + * At the end of the transfer, the callback is invoked by the interrupt handler. + */ +typedef struct { + /** Pointer to the Buffer. */ + uint8_t *pBuff; + /** Buff size in bytes. */ + uint32_t BuffSize; + /** Dma channel num. */ + uint32_t ChNum; + /** Callback function invoked at the end of transfer. */ + UartdCallback callback; + /** Callback arguments. */ + void *pArgument; + /** flag to indicate the current transfer. */ + volatile uint8_t sempaphore; + /* DMA LLI structure */ + LinkedListDescriporView1 *pLLIview; + /* DMA transfer type */ + eXdmadProgState dmaProgrammingMode; + /* DMA LLI size */ + uint16_t dmaBlockSize; + /* Flag using ring buffer or FiFo*/ + uint8_t dmaRingBuffer; +} UartChannel; + +/** Constant structure associated with UART port. This structure prevents + client applications to have access in the same time. */ +typedef struct { + /** USART Id as defined in the product datasheet */ + uint8_t uartId; + /** Pointer to DMA driver */ + sXdmad *pXdmad; + /** Pointer to UART Hardware registers */ + Uart *pUartHw; + /** Current Uart Rx channel */ + UartChannel *pRxChannel; + /** Current Uart Tx channel */ + UartChannel *pTxChannel; +} UartDma; + +/*---------------------------------------------------------------------------- + * Exported functions + *----------------------------------------------------------------------------*/ + +uint32_t UARTD_Configure(UartDma *pUartd , + uint8_t uartId, + uint32_t uartMode, + uint32_t baud, + uint32_t clk); + +uint32_t UARTD_EnableTxChannels(UartDma *pUartd, UartChannel *pTxCh); + +uint32_t UARTD_EnableRxChannels(UartDma *pUartd, UartChannel *pRxCh); + +uint32_t UARTD_DisableTxChannels(UartDma *pUartd, UartChannel *pTxCh); + +uint32_t UARTD_DisableRxChannels(UartDma *pUartd, UartChannel *pRxCh); + +uint32_t UARTD_SendData(UartDma *pUartd); + +uint32_t UARTD_RcvData(UartDma *pUartd); + +#ifdef __cplusplus +} +#endif + +#endif /* #ifndef _UART_DMA_ */ |