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// $Id: BlinkConfigC.nc,v 1.7 2010-06-29 22:07:40 scipio Exp $
/*
* Copyright (c) 2000-2006 The Regents of the University of
* California. 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
* 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 HOLDER 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.
*/
/**
* Application to demonstrate the ConfigStorageC abstraction. A timer
* period is read from flash, divided by two, and written back to
* flash. An LED is toggled each time the timer fires.
*
* @author Prabal Dutta <prabal@cs.berkeley.edu>
*/
#include <Timer.h>
module BlinkConfigC {
uses {
interface Boot;
interface Leds;
interface ConfigStorage as Config;
interface Mount as Mount;
interface Timer<TMilli> as Timer0;
}
}
implementation {
typedef struct config_t {
uint16_t version;
uint16_t period;
} config_t;
enum {
CONFIG_ADDR = 0,
CONFIG_VERSION = 1,
DEFAULT_PERIOD = 1024,
MIN_PERIOD = 128,
MAX_PERIOD = 1024
};
uint8_t state;
config_t conf;
event void Boot.booted() {
conf.period = DEFAULT_PERIOD;
if (call Mount.mount() != SUCCESS) {
// Handle failure
}
}
event void Mount.mountDone(error_t error) {
if (error == SUCCESS) {
if (call Config.valid() == TRUE) {
if (call Config.read(CONFIG_ADDR, &conf, sizeof(conf)) != SUCCESS) {
// Handle failure
}
}
else {
// Invalid volume. Commit to make valid.
call Leds.led1On();
if (call Config.commit() == SUCCESS) {
call Leds.led0On();
}
else {
// Handle failure
}
}
}
else{
// Handle failure
}
}
event void Config.readDone(storage_addr_t addr, void* buf,
storage_len_t len, error_t err) __attribute__((noinline)) {
if (err == SUCCESS) {
memcpy(&conf, buf, len);
if (conf.version == CONFIG_VERSION) {
conf.period = conf.period/2;
conf.period = conf.period > MAX_PERIOD ? MAX_PERIOD : conf.period;
conf.period = conf.period < MIN_PERIOD ? MAX_PERIOD : conf.period;
}
else {
// Version mismatch. Restore default.
call Leds.led1On();
conf.version = CONFIG_VERSION;
conf.period = DEFAULT_PERIOD;
}
call Leds.led0On();
call Config.write(CONFIG_ADDR, &conf, sizeof(conf));
}
else {
// Handle failure.
}
}
event void Config.writeDone(storage_addr_t addr, void *buf,
storage_len_t len, error_t err) {
// Verify addr and len
if (err == SUCCESS) {
if (call Config.commit() != SUCCESS) {
// Handle failure
}
}
else {
// Handle failure
}
}
event void Config.commitDone(error_t err) {
call Leds.led0Off();
call Timer0.startPeriodic(conf.period);
if (err == SUCCESS) {
// Handle failure
}
}
event void Timer0.fired() {
call Leds.led2Toggle();
}
}
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