154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
/*
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* Copyright (c) 2010, 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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*
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* Author : Joakim Eriksson
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* Created : 2010-02-02
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* Updated : $Date: 2010/11/05 10:31:57 $
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* $Revision: 1.3 $
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*/
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#include "contiki.h"
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#include "lib/sensors.h"
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#include "dev/z1-phidgets.h"
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static uint8_t adc_on;
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static uint8_t active;
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/*---------------------------------------------------------------------------*/
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static void
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sensors_activate(uint8_t type)
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{
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uint8_t pre = adc_on;
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adc_on |= type;
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if(pre == 0 && adc_on > 0) {
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P6DIR = 0xff;
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P6OUT = 0x00;
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P6SEL |= 0x8b; /* bit 7 + 3 + 1 + 0 */
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/* if nothing was started before, start up the ADC system */
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/* Set up the ADC. */
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ADC12CTL0 = REF2_5V + SHT0_6 + SHT1_6 + MSC; /* Setup ADC12, ref., sampling time */
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ADC12CTL1 = SHP + CONSEQ_3 + CSTARTADD_0; /* Use sampling timer, repeat-sequenc-of-channels */
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/* convert up to MEM4 */
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ADC12MCTL4 |= EOS;
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ADC12CTL0 |= ADC12ON + REFON;
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ADC12CTL0 |= ENC; /* enable conversion */
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ADC12CTL0 |= ADC12SC; /* sample & convert */
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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sensors_deactivate(uint8_t type)
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{
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adc_on &= ~type;
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if(adc_on == 0) {
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/* stop converting immediately, turn off reference voltage, etc. */
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/* wait for conversion to stop */
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ADC12CTL0 &= ~ENC;
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/* need to remove CONSEQ_3 if not EOS is configured */
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ADC12CTL1 &= ~CONSEQ_3;
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while(ADC12CTL1 & ADC12BUSY);
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ADC12CTL0 = 0;
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ADC12CTL1 = 0;
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P6DIR = 0x00;
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P6OUT = 0x00;
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P6SEL = 0x00;
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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/* ADC0 corresponds to the port under the logo, ADC1 to the port over the logo,
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ADC2 and ADC3 corresponds to port on the JCreate bottom expansion port) */
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switch(type) {
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case PHIDGET5V_1:
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return ADC12MEM0;
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case PHIDGET5V_2:
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return ADC12MEM1;
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case PHIDGET3V_1:
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return ADC12MEM2;
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case PHIDGET3V_2:
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return ADC12MEM3;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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switch(type) {
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case SENSORS_ACTIVE:
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case SENSORS_READY:
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return active;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int c)
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{
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switch(type) {
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case SENSORS_ACTIVE:
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if(c) {
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if(!status(SENSORS_ACTIVE)) {
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/* SREF_1 is Vref+ */
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/* MemReg6 == P6.0/A0 == 5V 1 */
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ADC12MCTL0 = (INCH_0 + SREF_0);
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/* MemReg7 == P6.3/A3 == 5V 2 */
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ADC12MCTL1 = (INCH_3 + SREF_0);
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/* MemReg8 == P6.1/A1 == 3V 1 */
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ADC12MCTL2 = (INCH_1 + SREF_0);
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/* MemReg9 == P6.7/A7 == 3V_2 */
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ADC12MCTL3 = (INCH_7 + SREF_0);
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sensors_activate(0x0F);
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active = 1;
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}
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} else {
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sensors_deactivate(0x0F);
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active = 0;
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}
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(phidgets, "Phidgets", value, configure, status);
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