/*
  sadc.h - ADC124S085 SPI ADC function declarations

  Copyright (c) 2008-2010 Micromint USA LLC
  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 Micromint USA LLC 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 THE
  COPYRIGHT HOLDER 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
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*/

#ifndef _SADC_H
#define _SADC_H

/* SPI port definitions */

/* Address of the SPI peripheral connected to the SPI ADC */
#define SADC_BASE          AT91C_BASE_SPI1
/* Peripheral ID of the SPI connected to the SPI ADC */
#define SADC_ID            AT91C_ID_SPI1
/* Chip select used for selecting SPI ADC */
#define SADC_CS            2
/* SPI peripheral pins to configure for SPI ADC access */
#define PINS_SADC          PINS_SPI1, PIN_SPI1_NPCS2

/* ADC definitions */

#define SADC0              (0 << 11)
#define SADC1              (1 << 11)
#define SADC2              (2 << 11)
#define SADC3              (3 << 11)
#define SADC4              (4 << 11)
#define SADC5              (5 << 11)
#define SADC6              (6 << 11)
#define SADC7              (7 << 11)

#define SADC_VREF          3300    /* Maximum voltage [mV] */
#define SADC_MASK          0x0FFF  /* Resolution (12-bit) */
#define SADC_MVOLTS(x)     ((SADC_VREF * x) / SADC_MASK)

/* API function declarations */
void SADC_Initialize(void);
unsigned int SADC_Read(unsigned int channel);

#endif /* _SADC_H */
