TLMFrame.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2015 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "TLMFrame.h"
00018 
00019 TLMFrame::TLMFrame(uint8_t  tlmVersionIn,
00020                    uint16_t tlmBatteryVoltageIn,
00021                    uint16_t tlmBeaconTemperatureIn,
00022                    uint32_t tlmPduCountIn,
00023                    uint32_t tlmTimeSinceBootIn) :
00024     tlmVersion(tlmVersionIn),
00025     lastTimeSinceBootRead(0),
00026     tlmBatteryVoltage(tlmBatteryVoltageIn),
00027     tlmBeaconTemperature(tlmBeaconTemperatureIn),
00028     tlmPduCount(tlmPduCountIn),
00029     tlmTimeSinceBoot(tlmTimeSinceBootIn)
00030 {
00031 }
00032 
00033 void TLMFrame::setTLMData(uint8_t tlmVersionIn)
00034 {
00035     /* According to the Eddystone spec BatteryVoltage is 0 and
00036      * BeaconTemperature is 0x8000 if not supported
00037      */
00038     tlmVersion           = tlmVersionIn;
00039     tlmBatteryVoltage    = 0;
00040     tlmBeaconTemperature = 0x8000;
00041     tlmPduCount          = 0;
00042     tlmTimeSinceBoot     = 0;
00043 }
00044 
00045 void TLMFrame::constructTLMFrame(uint8_t *rawFrame)
00046 {
00047     size_t index = 0;
00048     rawFrame[index++] = EDDYSTONE_UUID[0];                    // 16-bit Eddystone UUID
00049     rawFrame[index++] = EDDYSTONE_UUID[1];
00050     rawFrame[index++] = FRAME_TYPE_TLM;                       // Eddystone frame type = Telemetry
00051     rawFrame[index++] = tlmVersion;                           // TLM Version Number
00052     rawFrame[index++] = (uint8_t)(tlmBatteryVoltage >> 8);    // Battery Voltage[0]
00053     rawFrame[index++] = (uint8_t)(tlmBatteryVoltage >> 0);    // Battery Voltage[1]
00054     rawFrame[index++] = (uint8_t)(tlmBeaconTemperature >> 8); // Beacon Temp[0]
00055     rawFrame[index++] = (uint8_t)(tlmBeaconTemperature >> 0); // Beacon Temp[1]
00056     rawFrame[index++] = (uint8_t)(tlmPduCount >> 24);         // PDU Count [0]
00057     rawFrame[index++] = (uint8_t)(tlmPduCount >> 16);         // PDU Count [1]
00058     rawFrame[index++] = (uint8_t)(tlmPduCount >> 8);          // PDU Count [2]
00059     rawFrame[index++] = (uint8_t)(tlmPduCount >> 0);          // PDU Count [3]
00060     rawFrame[index++] = (uint8_t)(tlmTimeSinceBoot >> 24);    // Time Since Boot [0]
00061     rawFrame[index++] = (uint8_t)(tlmTimeSinceBoot >> 16);    // Time Since Boot [1]
00062     rawFrame[index++] = (uint8_t)(tlmTimeSinceBoot >> 8);     // Time Since Boot [2]
00063     rawFrame[index++] = (uint8_t)(tlmTimeSinceBoot >> 0);     // Time Since Boot [3]
00064 }
00065 
00066 size_t TLMFrame::getRawFrameSize(void) const
00067 {
00068     return FRAME_SIZE_TLM + EDDYSTONE_UUID_SIZE;
00069 }
00070 
00071 void TLMFrame::updateTimeSinceBoot(uint32_t nowInMillis)
00072 {
00073     tlmTimeSinceBoot      += (nowInMillis - lastTimeSinceBootRead) / 100;
00074     lastTimeSinceBootRead  = nowInMillis;
00075 }
00076 
00077 void TLMFrame::updateBatteryVoltage(uint16_t tlmBatteryVoltageIn)
00078 {
00079     tlmBatteryVoltage = tlmBatteryVoltageIn;
00080 }
00081 
00082 void TLMFrame::updateBeaconTemperature(uint16_t tlmBeaconTemperatureIn)
00083 {
00084     tlmBeaconTemperature = tlmBeaconTemperatureIn;
00085 }
00086 
00087 void TLMFrame::updatePduCount(void)
00088 {
00089     tlmPduCount++;
00090 }
00091 
00092 uint16_t TLMFrame::getBatteryVoltage(void) const
00093 {
00094     return tlmBatteryVoltage;
00095 }
00096 
00097 uint16_t TLMFrame::getBeaconTemperature(void) const
00098 {
00099     return tlmBeaconTemperature;
00100 }
00101 
00102 uint8_t TLMFrame::getTLMVersion(void) const
00103 {
00104     return tlmVersion;
00105 }