PayloadV1.cpp

00001 /** IoT Gateway RFM12B payload V1 format handling
00002  *
00003  * @author Andrew Lindsay
00004  *
00005  * @section LICENSE
00006  *
00007  * Copyright (c) 2012 Andrew Lindsay (andrew [at] thiseldo [dot] co [dot] uk)
00008  *
00009  * Permission is hereby granted, free of charge, to any person obtaining a copy
00010  * of this software and associated documentation files (the "Software"), to deal
00011  * in the Software without restriction, including without limitation the rights
00012  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00013  * copies of the Software, and to permit persons to whom the Software is
00014  * furnished to do so, subject to the following conditions:
00015 
00016  * The above copyright notice and this permission notice shall be included in
00017  * all copies or substantial portions of the Software.
00018  * 
00019  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00020  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00021  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00022  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00023  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00024  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00025  * THE SOFTWARE.
00026  * 
00027  * @section DESCRIPTION
00028  * 
00029  * 
00030  */
00031 
00032 #include "mbed.h"
00033 #include "RF12B.h"
00034 #include "PayloadV1.h"
00035 
00036 
00037 // Constructors for a new V1 payload
00038 PayloadV1::PayloadV1( ) : PayloadDef() {}
00039 PayloadV1::PayloadV1( uint8_t *pptr, short plen ): PayloadDef( pptr, plen ) {
00040     readingCount = (short) (payloadBuffer[2] - 1) / 3;
00041 }
00042 
00043 short PayloadV1::numReadings() {
00044     return readingCount;
00045 }
00046 
00047 int PayloadV1::reading( short readingNum ) {
00048 short reading = (payloadBuffer[6 + (readingNum * 3)] << 8) + payloadBuffer[5 + (readingNum * 3)];
00049     return (int)(reading);
00050 }
00051 
00052 short PayloadV1::sensorId( short readingNum ) {
00053     return (short)(payloadBuffer[4 + (readingNum * 3)]);
00054 }