PROJ515 / Mbed OS ELEC-351-GROUP-E-CW

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Dependencies:   BMP280

Sampling.cpp@15:e61297f9bae9, 2018-01-06 (annotated)

Committer:
Swaggie
Date:
Sat Jan 06 22:54:42 2018 +0000
Revision:
15:e61297f9bae9
Parent:
9:ac5673cca703 
LCD Constructor seems to be working. thread, ticker and button 2 are part of the class.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Swaggie 5:bea93c8e50b7 1 #include "Sampling.h"
Swaggie 5:bea93c8e50b7 2 #include "mbed.h"
Swaggie 8:dbb57b4d5ba4 3 #include "rtos.h"
Swaggie 6:8e1795a5886b 4
mwthewsey 9:ac5673cca703 5 //Thread Sync Tools
mwthewsey 9:ac5673cca703 6 Mutex tempReadingsLock;
mwthewsey 9:ac5673cca703 7 Mutex presReadingsLock;
mwthewsey 9:ac5673cca703 8 Mutex LDRReadingsLock;
mwthewsey 9:ac5673cca703 9 Mutex timeReadingsLock;
mwthewsey 9:ac5673cca703 10
mwthewsey 9:ac5673cca703 11 //Buffers with zero inital value
mwthewsey 9:ac5673cca703 12 float tempReadings[BUFFERSIZE] = {};
mwthewsey 9:ac5673cca703 13 float presReadings[BUFFERSIZE] = {};
mwthewsey 9:ac5673cca703 14 float LDRReadings[BUFFERSIZE] = {};
mwthewsey 9:ac5673cca703 15 float timeReadings[BUFFERSIZE] = {};
mwthewsey 9:ac5673cca703 16
mwthewsey 9:ac5673cca703 17 Thread t1; //Sample Enviromental Sensor
mwthewsey 9:ac5673cca703 18 Thread t2; //Sample LDR Sensor
mwthewsey 9:ac5673cca703 19
mwthewsey 9:ac5673cca703 20 Ticker sampleRate;
mwthewsey 9:ac5673cca703 21 Timeout SampleLEDTimeout;
mwthewsey 9:ac5673cca703 22
mwthewsey 9:ac5673cca703 23 bool NewEnvSample; //Is there new data from the envirom sensor to output?
mwthewsey 9:ac5673cca703 24 bool NewLDRSample; //Is there new data from the LDR to output?
mwthewsey 9:ac5673cca703 25
Swaggie 7:bf9f92ff02e8 26 //Index
Swaggie 15:e61297f9bae9 27 volatile unsigned short nextIndex = 0;
Swaggie 15:e61297f9bae9 28 volatile unsigned short currentIndex = 0;
Swaggie 15:e61297f9bae9 29 volatile unsigned short oldestIndex = 0;
Swaggie 7:bf9f92ff02e8 30
Swaggie 7:bf9f92ff02e8 31 bool firstSample = true;
Swaggie 6:8e1795a5886b 32
Swaggie 7:bf9f92ff02e8 33 //Hardware
Swaggie 7:bf9f92ff02e8 34 BMP280 sensor(D14, D15);
mwthewsey 9:ac5673cca703 35 AnalogIn LDRSensor(A0);
mwthewsey 9:ac5673cca703 36 DigitalOut SamplingLED(PB_10);
Swaggie 6:8e1795a5886b 37
Swaggie 5:bea93c8e50b7 38 void SampleTimerISR(void)
Swaggie 5:bea93c8e50b7 39 {
Swaggie 5:bea93c8e50b7 40 //Flag Threads
Swaggie 7:bf9f92ff02e8 41 t1.signal_set(1);
Swaggie 7:bf9f92ff02e8 42 t2.signal_set(1);
Swaggie 8:dbb57b4d5ba4 43 SamplingLED = 1;
mwthewsey 9:ac5673cca703 44 SampleLEDTimeout.attach(&FlipSamplingLED,0.1); //To turn LED off
Swaggie 5:bea93c8e50b7 45 }
Swaggie 7:bf9f92ff02e8 46
Swaggie 5:bea93c8e50b7 47 void ConfigThreadsAndIR(void)
Swaggie 5:bea93c8e50b7 48 {
Swaggie 7:bf9f92ff02e8 49 NewEnvSample = false; //Reset
Swaggie 7:bf9f92ff02e8 50 NewLDRSample = false; //Reset
Swaggie 7:bf9f92ff02e8 51
Swaggie 8:dbb57b4d5ba4 52 t1.start(&ThreadSampleEnvSensor);
Swaggie 8:dbb57b4d5ba4 53 t2.start(&ThreadSampleLDR);
Swaggie 7:bf9f92ff02e8 54
mwthewsey 9:ac5673cca703 55 sampleRate.attach(&SampleTimerISR, 1); //15 second interval
Swaggie 7:bf9f92ff02e8 56 }
Swaggie 7:bf9f92ff02e8 57
Swaggie 7:bf9f92ff02e8 58 void AddTempSample(float temp)
Swaggie 7:bf9f92ff02e8 59 {
Swaggie 7:bf9f92ff02e8 60 tempReadingsLock.lock(); //Take the key
mwthewsey 9:ac5673cca703 61 tempReadings[nextIndex] = temp; //Add the sample after the most recent
Swaggie 7:bf9f92ff02e8 62 tempReadingsLock.unlock(); // Release the key
Swaggie 7:bf9f92ff02e8 63 }
Swaggie 7:bf9f92ff02e8 64
Swaggie 7:bf9f92ff02e8 65 void AddPresSample(float pres)
Swaggie 7:bf9f92ff02e8 66 {
Swaggie 7:bf9f92ff02e8 67 presReadingsLock.lock(); //Take the key
mwthewsey 9:ac5673cca703 68 presReadings[nextIndex] = pres; //Add to register
Swaggie 8:dbb57b4d5ba4 69 presReadingsLock.unlock(); //Release the key
Swaggie 6:8e1795a5886b 70 }
Swaggie 6:8e1795a5886b 71
Swaggie 7:bf9f92ff02e8 72 void ThreadSampleEnvSensor(void)
Swaggie 6:8e1795a5886b 73 {
Swaggie 7:bf9f92ff02e8 74 while (true) {
Swaggie 7:bf9f92ff02e8 75 Thread::signal_wait(1); //Wait for signal 1
Swaggie 7:bf9f92ff02e8 76 //Get readings
Swaggie 7:bf9f92ff02e8 77 float temp = sensor.getTemperature();
Swaggie 7:bf9f92ff02e8 78 float pres = sensor.getPressure();
Swaggie 7:bf9f92ff02e8 79 AddPresSample(pres); //Add value to register
Swaggie 7:bf9f92ff02e8 80 AddTempSample(temp); //Add value to register
Swaggie 7:bf9f92ff02e8 81 NewEnvSample = true; //Signal to main thread
Swaggie 7:bf9f92ff02e8 82 }
Swaggie 7:bf9f92ff02e8 83 }
Swaggie 7:bf9f92ff02e8 84
Swaggie 7:bf9f92ff02e8 85 void AddLDRSample(float LDRval)
Swaggie 7:bf9f92ff02e8 86 {
Swaggie 7:bf9f92ff02e8 87 LDRReadingsLock.lock(); //Take the key
mwthewsey 9:ac5673cca703 88 LDRReadings[nextIndex] = LDRval; //Add the sample after the most recent
Swaggie 7:bf9f92ff02e8 89 LDRReadingsLock.unlock(); // Release the key
Swaggie 6:8e1795a5886b 90 }
Swaggie 6:8e1795a5886b 91
Swaggie 7:bf9f92ff02e8 92 void ThreadSampleLDR(void)
Swaggie 6:8e1795a5886b 93 {
Swaggie 7:bf9f92ff02e8 94 while (true) {
Swaggie 7:bf9f92ff02e8 95 Thread::signal_wait(1); //Wait for signal 1
Swaggie 7:bf9f92ff02e8 96 //get readings
Swaggie 8:dbb57b4d5ba4 97 float LDRval = LDRSensor; //Read the analogue pin value
Swaggie 7:bf9f92ff02e8 98 //get time function
Swaggie 7:bf9f92ff02e8 99 AddLDRSample(LDRval);
Swaggie 7:bf9f92ff02e8 100 //add time sample
Swaggie 7:bf9f92ff02e8 101 NewLDRSample = true; //signal to main thread
Swaggie 7:bf9f92ff02e8 102 }
Swaggie 7:bf9f92ff02e8 103 }
Swaggie 7:bf9f92ff02e8 104
Swaggie 7:bf9f92ff02e8 105 void IncrementIndex(void)
Swaggie 7:bf9f92ff02e8 106 {
mwthewsey 9:ac5673cca703 107 //printf("%d %d %d %2.2f %2.2f %2.2f %2.2f %2.2f %2.2f %2.2f %2.2f\r",nextIndex, currentIndex, oldestIndex, LDRReadings[0], LDRReadings[1], LDRReadings[2], LDRReadings[3], LDRReadings[4], LDRReadings[5], LDRReadings[6], LDRReadings[7]);
mwthewsey 9:ac5673cca703 108
mwthewsey 9:ac5673cca703 109 nextIndex = IndexIncrement(nextIndex); //Increment next index
mwthewsey 9:ac5673cca703 110 if (firstSample) {
mwthewsey 9:ac5673cca703 111 firstSample = false; //During first sample, do not increment current or oldest
mwthewsey 9:ac5673cca703 112 } else {
mwthewsey 9:ac5673cca703 113 currentIndex = IndexIncrement(currentIndex);
mwthewsey 9:ac5673cca703 114 if (currentIndex == oldestIndex) { //When current index overflows, start infrementing oldest
mwthewsey 9:ac5673cca703 115 oldestIndex = IndexIncrement(oldestIndex);
Swaggie 7:bf9f92ff02e8 116 }
Swaggie 7:bf9f92ff02e8 117 }
Swaggie 7:bf9f92ff02e8 118 }
Swaggie 8:dbb57b4d5ba4 119
mwthewsey 9:ac5673cca703 120 unsigned short IndexIncrement(unsigned short thisIndex)
mwthewsey 9:ac5673cca703 121 {
mwthewsey 9:ac5673cca703 122 if (thisIndex+1 == BUFFERSIZE) {
mwthewsey 9:ac5673cca703 123 thisIndex = 0; //When index reached buffersize, reset to 0
mwthewsey 9:ac5673cca703 124 } else {
mwthewsey 9:ac5673cca703 125 thisIndex++; //Else increment
mwthewsey 9:ac5673cca703 126 }
mwthewsey 9:ac5673cca703 127 return thisIndex;
mwthewsey 9:ac5673cca703 128 }
mwthewsey 9:ac5673cca703 129
mwthewsey 9:ac5673cca703 130
Swaggie 8:dbb57b4d5ba4 131 void FlipSamplingLED(void)
Swaggie 8:dbb57b4d5ba4 132 {
Swaggie 8:dbb57b4d5ba4 133 SamplingLED = 0;
Swaggie 8:dbb57b4d5ba4 134 }
mwthewsey 9:ac5673cca703 135