qdn_dma.h

/**************************************************************************
 *
 * Copyright (c) 2013, Qromodyn 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:
 *
 * 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.
 *
 * 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 THE COPYRIGHT OWNER 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.
 *
 * The views and conclusions contained in the software and documentation are those
 * of the authors and should not be interpreted as representing official policies,
 * either expressed or implied, of the FreeBSD Project.
 **************************************************************************/

#ifndef _QDN_DMA_H_
#define _QDN_DMA_H_

// #include "qdn_gpio.h"

class QDN_ADC;
class QDN_SPI;

class QDN_DMA
{
public:
    QDN_DMA(QDN_ADC& spi);
    QDN_DMA(QDN_SPI& spi, bool tx = false);
#if 1
    void Init();
    QDN_DMA& SetCallback(ISR_t callback, uint8_t preemptionPriority, uint8_t subPriority);
    QDN_DMA& SetMemory(volatile uint16_t* dst, uint32_t numTransfers, uint32_t unitSize);
    void Enable();
    void Disable();
    void DisableAndRearm();
    void DisableAndRearm(volatile void* dest);

private:
    friend QDN_ADC;
    DMA_TypeDef* dma;
    DMA_Channel_TypeDef* dmaChannel;
    DMA_InitTypeDef DMA_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
    uint16_t counter;
#endif
};

#endif