+/* -*- mode:c++; indent-tabs-mode: nil -*-
+ * Copyright (c) 2007, Technische Universitaet Berlin
+ * 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 Technische Universitaet Berlin nor the names
+ * of its 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.
+ */
+
+/**
+ * Implementation of coulomb counter board interface for eyesIFXv2.1
+ * @author: Andreas Koepke (koepke@tkn.tu-berlin.de)
+ */
+
+#include "Timer.h"
+
+module CoulombCounterP {
+ provides {
+ interface CoulombCounter;
+ interface Init;
+ }
+ uses {
+ interface Timer<TMilli> as Timer;
+ interface GpioInterrupt as EnergyInterrupt;
+ interface GeneralIO as EnergyPin;
+ interface GeneralIO as UsbBatSwitch;
+ interface GeneralIO as ResetBoard;
+ interface GeneralIO as UsbMonitor;
+ }
+}
+implementation {
+#define MIN_DELAY 30
+
+ uint16_t timerHighBits = 0;
+ uint32_t dur = 0;
+
+ void resetBoard() {
+ call ResetBoard.set();
+ __asm__("NOP");
+ call ResetBoard.clr();
+ }
+
+ void startMeasure() {
+ unsigned i;
+ for(i = 0; i < 7; i++) {
+ call UsbBatSwitch.set();
+ call UsbBatSwitch.clr();
+ }
+ }
+
+ void stopMeasure() {
+ call UsbBatSwitch.set();
+ call UsbBatSwitch.clr();
+ // if your board allows it: delay until supply via USB stable
+ resetBoard();
+ }
+
+ command error_t Init.init() {
+ call EnergyPin.makeInput();
+ call EnergyInterrupt.disable();
+
+ call UsbBatSwitch.makeOutput();
+ call UsbBatSwitch.clr();
+
+ call ResetBoard.makeOutput();
+ call ResetBoard.clr();
+
+ call UsbMonitor.makeInput();
+ if(!call CoulombCounter.isMeasureing()) {
+ resetBoard();
+ }
+ return SUCCESS;
+ }
+
+ async command bool CoulombCounter.isMeasureing() {
+ return call UsbMonitor.get(); // high --> disconnected --> measuremode
+ }
+
+ void startLongTimer() {
+ if(timerHighBits) {
+ timerHighBits--;
+ call Timer.startOneShot(-1);
+ }
+ else {
+ call Timer.startOneShot(dur);
+ }
+ }
+
+ command error_t CoulombCounter.startMeasurement(uint32_t delay, uint32_t duration) {
+ error_t result = SUCCESS;
+
+ timerHighBits = duration >> 22;
+ dur = duration * (uint32_t)1024;
+
+ if(call CoulombCounter.isMeasureing()) {
+ startLongTimer();
+ call EnergyInterrupt.enableFallingEdge();
+ }
+ else {
+ if((delay < MIN_DELAY) || (delay > ((uint32_t)1<<21))) {
+ result = FAIL;
+ }
+ else {
+ call Timer.startOneShot(delay * (uint32_t)1024);
+ }
+ }
+ return result;
+ }
+
+ /** Stop a measurement, returns FAIL if there is no ongoing measurement */
+ command error_t CoulombCounter.stopMeasurement() {
+ error_t result = FAIL;
+ call Timer.stop();
+ timerHighBits = 0;
+ dur = 0;
+ call EnergyInterrupt.disable();
+ if(call CoulombCounter.isMeasureing()) {
+ stopMeasure();
+ result = SUCCESS;
+ }
+ return result;
+ }
+
+ async event void EnergyInterrupt.fired() {
+ signal CoulombCounter.portionConsumed();
+ }
+
+ event void Timer.fired() {
+ if(call CoulombCounter.isMeasureing()) {
+ if(timerHighBits) {
+ startLongTimer();
+ }
+ else {
+ // measurement finished
+ call CoulombCounter.stopMeasurement();
+ }
+ }
+ else {
+ // finished waiting for delay
+ resetBoard();
+ startLongTimer();
+ call EnergyInterrupt.enableFallingEdge();
+ startMeasure();
+ }
+ }
+}