/****************************************************************************
*
*   Copyright (c) 2005 Dave Hylands
*
*   This program is free software; you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation; either version 2 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program; if not, write to the Free Software
*   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*
****************************************************************************/
/**
*
*   @file    a2d_8.c
*
*   @brief   Contains code for retrieving 8 bit A/D samples.
*
*****************************************************************************/

/* ---- Include Files ----------------------------------------------------- */

#include <avr/io.h>
#include "Config.h"
#include "Hardware.h"

/* ---- Public Variables -------------------------------------------------- */
/* ---- Private Constants and Types --------------------------------------- */
/* ---- Private Variables ------------------------------------------------- */
/* ---- Private Function Prototypes --------------------------------------- */
/* ---- Functions --------------------------------------------------------- */

/****************************************************************************/
/**
*   Reads an 8 bit A/D value.
*/

#if CFG_USE_ADC

uint8_t a2d_8( uint8_t Channel )
{
    // Select the channel
    ADMUX = Channel | ( 1 <<  ADLAR  );

    // Start the conversion
    ADCSR = ADCSR | ( 1 << ADSC );

    // Wait for it to complete
    while ( ADCSR & ( 1 << ADSC ));

    // We only need the top 8 bits (left-adjusted)
    return ADCH;

} // a2d _8

#endif  // CFG_USE_ADC