dma.nc

来自「Develop Zigbee network real-time Os」· NC 代码 · 共 69 行

/*
 * Copyright (c) 2007 University of Copenhagen
 * 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 following disclaimer.
 * - 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.
 * - Neither the name of University of Copenhagen nor the names of
 *   its contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 STANFORD
 * UNIVERSITY OR ITS 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,
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 *
 * @author Marcus Chang <[e-mail]>
 */

typedef struct {
   uint16_t SRCADDR;
   uint16_t DESTADDR;

   uint16_t LEN      : 13;
   uint16_t VLEN     : 3;

   uint8_t TRIG      : 5;
   uint8_t TMODE     : 2;
   uint8_t WORDSIZE  : 1;

   uint8_t PRIORITY  : 2;
   uint8_t M8        : 1;
   uint8_t IRQMASK   : 1;
   uint8_t DESTINC   : 2;
   uint8_t SRCINC    : 2;
} dma_config_t;


interface Dma {

  command dma_config_t * getConfig();
    
  command error_t armChannel();
  command error_t disarmChannel();
  command bool isArmed();
  command error_t startTransfer();
  command error_t stopTransfer();

  async event void transferDone();
}