dmaarray.h

tinyos2.0版本驱动

/*
 * Copyright (c) 2005 Yale University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgement:
 *       This product includes software developed by the Embedded Networks
 *       and Applications Lab (ENALAB) at Yale University.
 * 4. Neither the name of the University nor that of the Laboratory
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY YALE UNIVERSITY 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 REGENTS
 * 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.
 *
 */ 
 /**
 * @brief dma array operations
 * @author Andrew Barton-Sweeney ([e-mail])
 * @author Thiago Teixeira
 */
 /**                                         
 * Modified and ported to tinyos-2.x.
 * 
 * @author Brano Kusy ([e-mail])
 * @version October 25, 2007
 */
#ifndef _DMA_ARRAY_H
#define _DMA_ARRAY_H

typedef struct {
    uint32_t DDADR;
    uint32_t DSADR;
    uint32_t DTADR;
    uint32_t DCMD;
} DMADescriptor_t;


#define MAX_DESC_TRANSFER  8184		// max is 8K-1, CIF requires a multiple of 8	//8192

// ----------------------------------------------
#define DescArray_NBR_DESC         20//8
#define DescArray_BYTE_ALLIGNMENT  16
#define DescArray_BUFFER_SIZE      (DescArray_NBR_DESC*sizeof(DMADescriptor_t) + DescArray_BYTE_ALLIGNMENT)

typedef struct DescArray
{
    uint8_t data[DescArray_BUFFER_SIZE];   // The data is alligned from data[baseIndex]
} DescArray;

#endif //_DMA_ARRAY_H