mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-08 23:08:29 +00:00
111 lines
4.3 KiB
C
111 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 2008 Swedish Institute of Computer Science
|
|
* 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 the copyright holders nor the names of
|
|
* 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 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.
|
|
*/
|
|
/**
|
|
* \file
|
|
*
|
|
* \brief
|
|
* Functions to control the ADC of the MCU. This is used to read the
|
|
* joystick.
|
|
*
|
|
* \author
|
|
* Mike Vidales mavida404@gmail.com
|
|
*
|
|
*/
|
|
|
|
#ifndef __ADC_H__
|
|
#define __ADC_H__
|
|
|
|
#include <avr/io.h>
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#define adc_conversion_ongoing (ADCSRA |= (1<<ADSC))
|
|
#define adc_conversion_done (!(ADCSRA |= (1<<ADSC)))
|
|
|
|
/** \brief Lists the different ways in which the ADC can be triggered. */
|
|
typedef enum {
|
|
ADC_TRIG_FREE_RUN = ((0<<ADTS2)|(0<<ADTS1)|(0<<ADTS0)),
|
|
ADC_TRIG_ANACOMP = ((0<<ADTS2)|(0<<ADTS1)|(1<<ADTS0)),
|
|
ADC_TRIG_EXTINT0 = ((0<<ADTS2)|(1<<ADTS1)|(0<<ADTS0)),
|
|
ADC_TRIG_TIM0_COMPA = ((0<<ADTS2)|(1<<ADTS1)|(1<<ADTS0)),
|
|
ADC_TRIG_TIM0_OVF = ((1<<ADTS2)|(0<<ADTS1)|(0<<ADTS0)),
|
|
ADC_TRIG_TIM1_COMPB = ((1<<ADTS2)|(0<<ADTS1)|(1<<ADTS0)),
|
|
ADC_TRIG_TIM1_OVF = ((1<<ADTS2)|(1<<ADTS1)|(0<<ADTS0)),
|
|
ADC_TRIG_TIM1_CAPT = ((1<<ADTS2)|(1<<ADTS1)|(1<<ADTS0))
|
|
} adc_trig_t;
|
|
|
|
/** \brief Lists a variety of prescalers used with the ADC. */
|
|
typedef enum {
|
|
ADC_PS_2 = ((0<<ADPS2)|(0<<ADPS1)|(1<<ADPS0)),
|
|
ADC_PS_4 = ((0<<ADPS2)|(1<<ADPS1)|(0<<ADPS0)),
|
|
ADC_PS_8 = ((0<<ADPS2)|(1<<ADPS1)|(1<<ADPS0)),
|
|
ADC_PS_16 = ((1<<ADPS2)|(0<<ADPS1)|(0<<ADPS0)),
|
|
ADC_PS_32 = ((1<<ADPS2)|(0<<ADPS1)|(1<<ADPS0)),
|
|
ADC_PS_64 = ((1<<ADPS2)|(1<<ADPS1)|(0<<ADPS0)),
|
|
ADC_PS_128 = ((1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0))
|
|
} adc_ps_t;
|
|
|
|
/**
|
|
* \brief Lists the ways in which the voltage reference can be configured
|
|
* for use with the ADC.
|
|
*/
|
|
typedef enum {
|
|
ADC_REF_AREF = ((0<<REFS1)|(0<<REFS0)),
|
|
ADC_REF_AVCC = ((0<<REFS1)|(1<<REFS0)),
|
|
ADC_REF_INT = ((1<<REFS1)|(1<<REFS0))
|
|
} adc_ref_t;
|
|
|
|
/** \brief Lists each channel's mask value for the ADC MUX. */
|
|
typedef enum {
|
|
ADC_CHAN_ADC0 = ((0<<MUX4)|(0<<MUX3)|(0<<MUX2)|(0<<MUX1)|(0<<MUX0)),
|
|
ADC_CHAN_ADC1 = ((0<<MUX4)|(0<<MUX3)|(0<<MUX2)|(0<<MUX1)|(1<<MUX0)),
|
|
ADC_CHAN_ADC2 = ((0<<MUX4)|(0<<MUX3)|(0<<MUX2)|(1<<MUX1)|(0<<MUX0)),
|
|
ADC_CHAN_ADC3 = ((0<<MUX4)|(0<<MUX3)|(0<<MUX2)|(1<<MUX1)|(1<<MUX0)),
|
|
ADC_CHAN_ADC4 = ((0<<MUX4)|(0<<MUX3)|(1<<MUX2)|(0<<MUX1)|(0<<MUX0)),
|
|
ADC_CHAN_ADC5 = ((0<<MUX4)|(0<<MUX3)|(1<<MUX2)|(0<<MUX1)|(1<<MUX0)),
|
|
ADC_CHAN_ADC6 = ((0<<MUX4)|(0<<MUX3)|(1<<MUX2)|(1<<MUX1)|(0<<MUX0)),
|
|
ADC_CHAN_ADC7 = ((0<<MUX4)|(0<<MUX3)|(1<<MUX2)|(1<<MUX1)|(1<<MUX0))
|
|
} adc_chan_t;
|
|
|
|
/** \brief Lists the two ADC adjustment values. */
|
|
typedef enum {
|
|
ADC_ADJ_RIGHT = 0,
|
|
ADC_ADJ_LEFT = 1
|
|
} adc_adj_t;
|
|
|
|
int adc_init(adc_chan_t chan, adc_trig_t trig, adc_ref_t ref, adc_ps_t prescale);
|
|
void adc_deinit(void);
|
|
int adc_conversion_start(void);
|
|
int16_t adc_result_get(adc_adj_t adjust);
|
|
|
|
#endif /* __ADC_H__ */
|
|
|