94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* ADC functions.
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* \author
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* Nicolas Tsiftes <nvt@sics.se>
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*/
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#include "contiki.h"
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#include "contiki-msb430.h"
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void
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adc_init(void)
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{
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ADC12CTL0 = SHT0_15 | SHT1_15 | MSC;
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/*
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* SHP: sampling timer
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* CONSEQ3: repeat sequence of channels
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* CSTARTADD: conversion start address 0
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*/
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ADC12CTL1 = SHP | CONSEQ_3 | CSTARTADD_0;
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/* P60: A0 */
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ADC12MCTL0 = INCH_0 | SREF_0;
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ADC12MCTL1 = INCH_1 | SREF_0;
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ADC12MCTL2 = INCH_2 | SREF_0;
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/* P61: A1 */
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ADC12MCTL3 = ADC12MCTL4 = ADC12MCTL5 = INCH_1 | SREF_0;
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/* P62: A2 */
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ADC12MCTL6 = ADC12MCTL7 = ADC12MCTL8 = ADC12MCTL9 = INCH_2 | SREF_0;
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/* P63: A3 */
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ADC12MCTL10 = INCH_3 | SREF_0;
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/* P64: A4 */
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ADC12MCTL11 = INCH_4 | SREF_0;
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/* P65: A5 */
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ADC12MCTL12 = INCH_5 | SREF_0;
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/* INCH10: Temperature sensor. */
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ADC12MCTL13 = INCH_10 | SREF_0 | EOS;
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}
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void
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adc_on(void)
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{
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ADC12CTL0 |= ADC12ON;
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clock_delay(20000);
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ADC12CTL0 |= ENC;
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ADC12CTL0 |= ADC12SC;
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}
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void
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adc_off(void)
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{
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ADC12CTL0 &= ~ENC;
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clock_delay(20000);
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ADC12CTL0 &= ~ADC12ON;
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}
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