Brandon Davies / Mbed 2 deprecated eleven-x-semtech-workshop-demo

Workshop demo program

Dependencies:   PinDetect mbed LoRaWAN-lib SX1272Lib

app/app.cpp@19:31fc997c460b, 2017-05-03 (annotated)

Committer:
Brandond200
Date:
Wed May 03 16:51:28 2017 +0000
Revision:
19:31fc997c460b
Parent:
18:326069443137 
added a new timer to make sure the sending bool never gets stuck in the transmitting position. changed the uint8_t counting cycles for checkAlarm to a uint16_t

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sergei11522 7:d7cdd6804277 1 #include "main.h"
sergei11522 7:d7cdd6804277 2 #include "mbed.h"
sergei11522 7:d7cdd6804277 3 #include "DebounceIn.h"
sergei11522 7:d7cdd6804277 4 #include "PinNames.h"
Brandond200 8:fb8b53c490e1 5 #include "timer.h"
Brandond200 10:2eb7b1614bb8 6 #include <math.h>
Brandond200 8:fb8b53c490e1 7 #include "app.h"
Brandond200 8:fb8b53c490e1 8 #include "SerialDisplay.h"
sergei11522 7:d7cdd6804277 9
sergei11522 7:d7cdd6804277 10 //initialize our sensors
sergei11522 7:d7cdd6804277 11 DebounceIn button(D6);
sergei11522 7:d7cdd6804277 12 DigitalOut led(A1);
sergei11522 7:d7cdd6804277 13 AnalogIn rotary(A3); //the potentiometer/rotary sensor
sergei11522 7:d7cdd6804277 14
Brandond200 12:67fcab1e915a 15 //changable alarm threashold
Brandond200 12:67fcab1e915a 16 #define ALARM_THRESHOLD 100 /*alarm triggered over this percentage*/
Brandond200 10:2eb7b1614bb8 17
Brandond200 12:67fcab1e915a 18 //constatnts
Brandond200 10:2eb7b1614bb8 19 #define BYTE_TO_PERCENT 655.35/*divisor to convert 2 byte number into number between 0 and 100*/
Brandond200 10:2eb7b1614bb8 20 #define TWO_HUNDRED_MILLISECONDS 200 * 1000 /*200 miliseconds in microseconds */
Brandond200 12:67fcab1e915a 21
Brandond200 12:67fcab1e915a 22 //myDevies codes
Brandond200 12:67fcab1e915a 23 #define ROTATION_DATA_CHANNEL 0 /* myDevices channel to send rotation position on*/
Brandond200 10:2eb7b1614bb8 24 #define ROTATION_DATA_TYPE 2 /*2 = Analog Input */
Brandond200 12:67fcab1e915a 25 #define ALARM_DATA_CHANNEL 1 /* myDevices channel to send alarm status on*/
Brandond200 10:2eb7b1614bb8 26 #define ALARM_DATA_TYPE 0 /*0 = Digital Input */
Brandond200 12:67fcab1e915a 27
Brandond200 12:67fcab1e915a 28 //settings to not change
Brandond200 10:2eb7b1614bb8 29 #define MAX_DATA_LENGTH 64
Brandond200 10:2eb7b1614bb8 30 #define BLINK_COUNT_EVENT_TRANSMIT 1
Brandond200 10:2eb7b1614bb8 31 #define BLINK_COUNT_TIMER_TRANSMIT 2
Brandond200 10:2eb7b1614bb8 32 #define BLINK_COUNT_DOWNLINK_CONFIRMATION 3
Brandond200 12:67fcab1e915a 33 #define BLINK_COUNT_JOINED 5
Brandond200 10:2eb7b1614bb8 34
Brandond200 10:2eb7b1614bb8 35 //network variables
Brandond200 10:2eb7b1614bb8 36 bool just_joined = true; //used to determine if this is the first time through the loop
Brandond200 18:326069443137 37 volatile bool sending = false;
Brandond200 10:2eb7b1614bb8 38 uint8_t data[MAX_DATA_LENGTH] = {0}; //data that will be transmitted
Brandond200 10:2eb7b1614bb8 39 uint8_t dataLength = 0; //length of data that will be transmitted
Brandond200 10:2eb7b1614bb8 40
Brandond200 10:2eb7b1614bb8 41 //application variables
Brandond200 10:2eb7b1614bb8 42 bool button_pressed = false; //last state of the button
Brandond200 12:67fcab1e915a 43 bool alarmThresholdTriggered = false; //last state on the alarm
Brandond200 10:2eb7b1614bb8 44 uint8_t flashCount = 0; //how many more times to flash the LED
Brandond200 19:31fc997c460b 45 uint16_t checkCount = 0;
Brandond200 10:2eb7b1614bb8 46
Brandond200 10:2eb7b1614bb8 47 //timers
Brandond200 19:31fc997c460b 48 TimerEvent_t heartbeatTimer; //timer so schedule heartbeat transmissions
Brandond200 10:2eb7b1614bb8 49 TimerEvent_t ledTimer; //timer to blink LED
Brandond200 19:31fc997c460b 50 TimerEvent_t txEndTimer;
Brandond200 8:fb8b53c490e1 51
sergei11522 7:d7cdd6804277 52
sergei11522 7:d7cdd6804277 53 void onDownlinkConfirmation(){
Brandond200 10:2eb7b1614bb8 54 flashLED(BLINK_COUNT_DOWNLINK_CONFIRMATION);
Brandond200 19:31fc997c460b 55 TimerStop(&txEndTimer);
Brandond200 18:326069443137 56 sending = false;
Brandond200 18:326069443137 57 }
Brandond200 18:326069443137 58
Brandond200 18:326069443137 59 void onDownlinkUnconfirmed(){
Brandond200 19:31fc997c460b 60 TimerStop(&txEndTimer);
Brandond200 18:326069443137 61 sending = false;
sergei11522 7:d7cdd6804277 62 }
sergei11522 7:d7cdd6804277 63
sergei11522 7:d7cdd6804277 64 void start(){
Brandond200 8:fb8b53c490e1 65 //any initialization here
Brandond200 18:326069443137 66
Brandond200 10:2eb7b1614bb8 67 //initilize LED flash timer
Brandond200 8:fb8b53c490e1 68 TimerInit(&ledTimer, flashLEDCallback);
Brandond200 10:2eb7b1614bb8 69 TimerSetValue( &ledTimer, TWO_HUNDRED_MILLISECONDS );
Brandond200 19:31fc997c460b 70
Brandond200 19:31fc997c460b 71 //initilize txTimeout timer
Brandond200 19:31fc997c460b 72 TimerInit(&txEndTimer, txTimeoutCallback);
Brandond200 19:31fc997c460b 73 TimerSetValue( &txEndTimer, 1000*1000*15 );
Brandond200 19:31fc997c460b 74
sergei11522 7:d7cdd6804277 75 }
sergei11522 7:d7cdd6804277 76
sergei11522 7:d7cdd6804277 77 //this loop will start to be called as soon as the device successfully joins the network
sergei11522 7:d7cdd6804277 78 void loop(){
sergei11522 7:d7cdd6804277 79 //the loop is called as soon as the device joins. Flash the led 10 times when this happens
sergei11522 7:d7cdd6804277 80 if (just_joined){
sergei11522 7:d7cdd6804277 81 just_joined = false;
Brandond200 10:2eb7b1614bb8 82 flashLED(BLINK_COUNT_JOINED);
sergei11522 7:d7cdd6804277 83 }
sergei11522 7:d7cdd6804277 84
Brandond200 12:67fcab1e915a 85 //check if button was just pressed
Brandond200 12:67fcab1e915a 86 checkButton();
Brandond200 18:326069443137 87
Brandond200 12:67fcab1e915a 88 }
Brandond200 12:67fcab1e915a 89
Brandond200 12:67fcab1e915a 90 void checkButton(void){
sergei11522 7:d7cdd6804277 91 //button is pressed. Trigger once so that if we hold the button this block doesnt continously execute
Brandond200 10:2eb7b1614bb8 92 if (button == 1 && button_pressed == false){
sergei11522 7:d7cdd6804277 93 button_pressed = true;
Brandond200 10:2eb7b1614bb8 94 flashLED(BLINK_COUNT_EVENT_TRANSMIT);
Brandond200 10:2eb7b1614bb8 95 transmitData(rotary.read_u16());
sergei11522 7:d7cdd6804277 96 } else if (button == 0){
sergei11522 7:d7cdd6804277 97 button_pressed = false;
sergei11522 7:d7cdd6804277 98 }
Brandond200 12:67fcab1e915a 99 }
Brandond200 12:67fcab1e915a 100
Brandond200 12:67fcab1e915a 101 //check if value passed in should trigger the alarm, if so, transmit
Brandond200 12:67fcab1e915a 102 void checkAlarm(void){
Brandond200 18:326069443137 103 checkCount++;
Brandond200 18:326069443137 104 if(checkCount > 5000){
Brandond200 18:326069443137 105 checkCount = 0;
Brandond200 18:326069443137 106 uint16_t position = rotary.read_u16();
Brandond200 18:326069443137 107 //check if should trigger alarm
Brandond200 18:326069443137 108 if(position / BYTE_TO_PERCENT > (ALARM_THRESHOLD)){
Brandond200 18:326069443137 109 //if the alarm has not already been triggered
Brandond200 18:326069443137 110 if(!alarmThresholdTriggered){
Brandond200 18:326069443137 111 alarmThresholdTriggered = true;//set the alarm to triggered
Brandond200 18:326069443137 112 flashLED(BLINK_COUNT_EVENT_TRANSMIT);
Brandond200 18:326069443137 113 transmitData(position);//transmit data
Brandond200 18:326069443137 114 }
Brandond200 12:67fcab1e915a 115 }
Brandond200 18:326069443137 116 else if(position / BYTE_TO_PERCENT < (ALARM_THRESHOLD - 1)){
Brandond200 18:326069443137 117 if(alarmThresholdTriggered){
Brandond200 18:326069443137 118 //alarm just changed state to not triggered
Brandond200 18:326069443137 119 flashLED(BLINK_COUNT_EVENT_TRANSMIT);
Brandond200 18:326069443137 120 transmitData(position);//transmit data
Brandond200 18:326069443137 121 alarmThresholdTriggered = false;
Brandond200 18:326069443137 122 }
Brandond200 15:07f7e9ce7e21 123 }
Brandond200 12:67fcab1e915a 124 }
Brandond200 12:67fcab1e915a 125 }
Brandond200 12:67fcab1e915a 126
Brandond200 12:67fcab1e915a 127 //start heartbeat timer. pass in how often in seconds it should transmit
Brandond200 12:67fcab1e915a 128 void startHeartbeat(uint8_t time){
Brandond200 19:31fc997c460b 129 TimerInit(&heartbeatTimer, timerCallback);
Brandond200 19:31fc997c460b 130 TimerSetValue( &heartbeatTimer, time * 1000 * 1000);
Brandond200 19:31fc997c460b 131 TimerStart(&heartbeatTimer);
Brandond200 10:2eb7b1614bb8 132 }
Brandond200 10:2eb7b1614bb8 133
Brandond200 10:2eb7b1614bb8 134 //Transmit rotory position and alarm status
Brandond200 12:67fcab1e915a 135 void transmitData(uint16_t position){
Brandond200 18:326069443137 136 if(!sending){
Brandond200 18:326069443137 137 sending = true;
Brandond200 18:326069443137 138 addRotaryData(position); //add the rotary position to data
Brandond200 15:07f7e9ce7e21 139
Brandond200 18:326069443137 140 setDataToSend(data, dataLength); //set data to be transmitted
Brandond200 18:326069443137 141 sendLoraTransmission(); //queue transmission
Brandond200 18:326069443137 142 dataLength = 0; //reset data length so new data starts back at begining
Brandond200 19:31fc997c460b 143 TimerStart(&txEndTimer);
Brandond200 18:326069443137 144 }
Brandond200 10:2eb7b1614bb8 145 }
Brandond200 10:2eb7b1614bb8 146
Brandond200 10:2eb7b1614bb8 147 //read the rotory position and add to data to transmit
Brandond200 10:2eb7b1614bb8 148 void addRotaryData(uint16_t positionArg){
Brandond200 10:2eb7b1614bb8 149 uint16_t position = positionArg / (BYTE_TO_PERCENT / 100);
Brandond200 10:2eb7b1614bb8 150
Brandond200 10:2eb7b1614bb8 151 data[dataLength++] = ROTATION_DATA_CHANNEL;
Brandond200 10:2eb7b1614bb8 152 data[dataLength++] = ROTATION_DATA_TYPE;
Brandond200 11:88afd7663dc4 153 data[dataLength++] = position >> 8; //add the upper byte of the rotory position
Brandond200 10:2eb7b1614bb8 154 data[dataLength++] = position & 0xFF; //add the lower byte of the rotory position
Brandond200 10:2eb7b1614bb8 155 }
Brandond200 10:2eb7b1614bb8 156
Brandond200 10:2eb7b1614bb8 157 //read the rotory position and add alarm status to data to transmit
Brandond200 10:2eb7b1614bb8 158 void addAlarmData(uint16_t positionArg){
Brandond200 10:2eb7b1614bb8 159 int16_t position = positionArg / BYTE_TO_PERCENT;
Brandond200 10:2eb7b1614bb8 160
Brandond200 10:2eb7b1614bb8 161 data[dataLength++] = ALARM_DATA_CHANNEL;
Brandond200 10:2eb7b1614bb8 162 data[dataLength++] = ALARM_DATA_TYPE;
Brandond200 15:07f7e9ce7e21 163 data[dataLength++] = (uint8_t)position >= ALARM_THRESHOLD; //add binary for it alarm triggered or not
Brandond200 10:2eb7b1614bb8 164 }
Brandond200 10:2eb7b1614bb8 165
Brandond200 10:2eb7b1614bb8 166 //start flash LED
Brandond200 10:2eb7b1614bb8 167 void flashLED(uint8_t times){
Brandond200 11:88afd7663dc4 168 if(flashCount == 0){ //if it is not currently flashing
Brandond200 13:d2cccfdb615c 169 TimerStart(&ledTimer); //start timer to toggle LED state
Brandond200 11:88afd7663dc4 170 }
Brandond200 11:88afd7663dc4 171 flashCount += times; //set the number of times to flash
Brandond200 15:07f7e9ce7e21 172 //make sure it is not set to high
Brandond200 15:07f7e9ce7e21 173 if(flashCount > 10){
Brandond200 15:07f7e9ce7e21 174 flashCount = 10;
Brandond200 15:07f7e9ce7e21 175 }
Brandond200 13:d2cccfdb615c 176 led.write(1); //turn on LED
Brandond200 10:2eb7b1614bb8 177 }
Brandond200 10:2eb7b1614bb8 178
Brandond200 10:2eb7b1614bb8 179 //callback to change state of LED for blinking
Brandond200 10:2eb7b1614bb8 180 void flashLEDCallback(){
Brandond200 10:2eb7b1614bb8 181 //if the LED is on, turn it off
Brandond200 10:2eb7b1614bb8 182 if(led.read() == 1){
Brandond200 10:2eb7b1614bb8 183 led.write(0);
Brandond200 10:2eb7b1614bb8 184 flashCount--;
Brandond200 10:2eb7b1614bb8 185 //if done flashing turn off the timer
Brandond200 10:2eb7b1614bb8 186 if(flashCount <= 0){
Brandond200 10:2eb7b1614bb8 187 TimerStop(&ledTimer);
Brandond200 10:2eb7b1614bb8 188 }
Brandond200 10:2eb7b1614bb8 189 }
Brandond200 10:2eb7b1614bb8 190 //if LED is off, turn it on
Brandond200 10:2eb7b1614bb8 191 else{
Brandond200 10:2eb7b1614bb8 192 led.write(1);
Brandond200 10:2eb7b1614bb8 193 }
Brandond200 10:2eb7b1614bb8 194 }
Brandond200 10:2eb7b1614bb8 195
Brandond200 12:67fcab1e915a 196
Brandond200 12:67fcab1e915a 197 //callback for transmission timer
Brandond200 12:67fcab1e915a 198 void timerCallback(){
Brandond200 12:67fcab1e915a 199 flashLED(BLINK_COUNT_TIMER_TRANSMIT);
Brandond200 12:67fcab1e915a 200 transmitData(rotary.read_u16());
Brandond200 19:31fc997c460b 201 }
Brandond200 19:31fc997c460b 202
Brandond200 19:31fc997c460b 203 void txTimeoutCallback(){
Brandond200 19:31fc997c460b 204 sending = false;
Brandond200 19:31fc997c460b 205 TimerStop(&txEndTimer);
Brandond200 8:fb8b53c490e1 206 }