/* ---------------------------------------------------------------------------- | |
* ATMEL Microcontroller Software Support | |
* ---------------------------------------------------------------------------- | |
* Copyright (c) 2009, Atmel Corporation | |
* | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are 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_ */ |