/* ---------------------------------------------------------------------------- */
/* 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 */
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/* ---------------------------------------------------------------------------- */
/**
* \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_ */
