/* *****************************************************************************
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 *
 *  Created: 12/18/09 02:41:55
 *  Copyright (c) 2009 Perry L. Hung. All rights reserved.
 *
 * ****************************************************************************/

/**
 *  @file wiring_analog.c
 *
 *  @brief 
 */

#include "libmaple.h"
#include "wiring.h"
#include "adc.h"

/* Indexed by pins A[0-15]  */
uint32_t PIN_TO_ADC[NR_ANALOG_PINS] = {
    10,                     // A0/D14    ADC10
    11,                     // A1/D15    ADC11
    12,                     // A2/D16    ADC12
    13,                     // A3/D17    ADC13
    14,                     // A4/D18    ADC14
    15,                     // A5/D19    ADC15
     3,                     // A6/D0     ADC3
     2,                     // A7/D1     ADC2
     0,                     // A8/D2     ADC0
     1,                     // A9/D3     ADC1
     4,                     // A10/D10   ADC4
     7,                     // A11/D11   ADC7
     6,                     // A12/D12   ADC6
     5,                     // A13/D13   ADC5
     8,                     // A14/D26   ADC8
     9,                     // A15/D11   ADC9
};

/* Assumes that the ADC has been initialized and
 * that the pin is set to ANALOG_INPUT */
uint32_t analogRead(uint8_t pin) {
    if (pin >= NR_ANALOG_PINS)
        return 0;

    return adc_read(PIN_TO_ADC[pin]);
}