Ferry Musters / Mbed 2 deprecated Clap_Unit

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Dependencies:   mbed

main.cpp@2:6b15e2363f00, 2015-07-03 (annotated)

Committer:
Ferryy
Date:
Fri Jul 03 09:42:38 2015 +0000
Revision:
2:6b15e2363f00
Parent:
1:df9d6f3886f6 
Final Version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Ferryy 2:6b15e2363f00 1 //**************************************************//
Ferryy 2:6b15e2363f00 2 // Clap_unit.cpp //
Ferryy 0:6c254e376969 3 //**************************************************//
Ferryy 0:6c254e376969 4 // Application to switch a light or other output //
Ferryy 0:6c254e376969 5 // whenever the correct handclapping pattern is //
Ferryy 1:df9d6f3886f6 6 // detected. An external handclap detection board //
Ferryy 1:df9d6f3886f6 7 // is used (works as a SR-latch). //
Ferryy 2:6b15e2363f00 8 //
Ferryy 2:6b15e2363f00 9 // The programmed pattern can be demonstrated by //
Ferryy 2:6b15e2363f00 10 // using SW3. An clapping pattern can be //
Ferryy 2:6b15e2363f00 11 // programmed by pressing switch SW2. //
Ferryy 0:6c254e376969 12 // //
Ferryy 2:6b15e2363f00 13 // Board: FRDM-K64F (using mbed IDE) //
Ferryy 0:6c254e376969 14 // Ferry Musters & Thom Grasso - 26/06/2015 //
Ferryy 0:6c254e376969 15 // Electrical Engineering - Hogeschool Utrecht //
Ferryy 0:6c254e376969 16 //**************************************************//
Ferryy 2:6b15e2363f00 17
Ferryy 0:6c254e376969 18
Ferryy 0:6c254e376969 19 #include "mbed.h"
Ferryy 0:6c254e376969 20
Ferryy 1:df9d6f3886f6 21 void BlinkLed(char color, float time);
Ferryy 1:df9d6f3886f6 22
Ferryy 1:df9d6f3886f6 23 //-------------------[ Parameters ]------------------
Ferryy 2:6b15e2363f00 24 const int timeout_ms = 2000; //
Ferryy 1:df9d6f3886f6 25 const int allowedError = 200; //Allowed time difference between clap and set clap pattern
Ferryy 1:df9d6f3886f6 26
Ferryy 2:6b15e2363f00 27 int clapPattern[100] = {0, 300, 900}; //initial clap pattern (in ms). Can be changed by user
Ferryy 2:6b15e2363f00 28 int clapPatternSize = 3; //initial clap pattern size (to indicate which portion of the array is used)
Ferryy 0:6c254e376969 29 //-------------------[ Variables ]-------------------
Ferryy 0:6c254e376969 30 DigitalOut led_red(LED_RED);
Ferryy 0:6c254e376969 31 DigitalOut led_blue(LED_BLUE);
Ferryy 0:6c254e376969 32 DigitalOut led_green(LED_GREEN);
Ferryy 2:6b15e2363f00 33 InterruptIn learningSwitch(SW2);
Ferryy 2:6b15e2363f00 34 InterruptIn demoSwitch(SW3);
Ferryy 2:6b15e2363f00 35
Ferryy 2:6b15e2363f00 36 PwmOut lamp(A5);
Ferryy 0:6c254e376969 37
Ferryy 1:df9d6f3886f6 38
Ferryy 1:df9d6f3886f6 39 DigitalOut boardGnd(D4); //pins
Ferryy 0:6c254e376969 40 DigitalOut boardVcc(D5);
Ferryy 0:6c254e376969 41 //InterruptIn boardClap(SW2);
Ferryy 0:6c254e376969 42 InterruptIn boardClap(D6);
Ferryy 0:6c254e376969 43 DigitalOut boardReset(D7);
Ferryy 0:6c254e376969 44
Ferryy 0:6c254e376969 45 Serial output(USBTX, USBRX);
Ferryy 1:df9d6f3886f6 46 Timer timer; //global timer
Ferryy 1:df9d6f3886f6 47 int clapData[100]; //buffer to save clap times
Ferryy 0:6c254e376969 48 int currentClap = 0; //counter to keep track of current clap in buffer
Ferryy 0:6c254e376969 49 int printedClap = 0; //counter to keep track of printf'ed claps
Ferryy 2:6b15e2363f00 50 bool learning = false; //flag to indicate if the system is learning a new clap pattern
Ferryy 0:6c254e376969 51
Ferryy 1:df9d6f3886f6 52 //-------------------[ Interrupts ]-------------------
Ferryy 1:df9d6f3886f6 53 void ClapDetected(void) //interrupt function for boardClap pin
Ferryy 0:6c254e376969 54 {
Ferryy 1:df9d6f3886f6 55 clapData[currentClap++] = timer.read_ms(); //save clap time and increment counter
Ferryy 0:6c254e376969 56 boardReset = 1; //reset the clap detecter board with a reset pulse
Ferryy 2:6b15e2363f00 57 BlinkLed('b',0.05); //wait to show led and also avoid handclap 'bounces'
Ferryy 0:6c254e376969 58 boardReset = 0;
Ferryy 1:df9d6f3886f6 59 }
Ferryy 1:df9d6f3886f6 60
Ferryy 2:6b15e2363f00 61 void DemoPattern(void) //interrupt function for userSwitch pin. Demonstrates
Ferryy 1:df9d6f3886f6 62 {
Ferryy 1:df9d6f3886f6 63 const float demoBlinkLength = 0.05; //led blink length in ms
Ferryy 1:df9d6f3886f6 64 wait(0.3);
Ferryy 1:df9d6f3886f6 65 BlinkLed('r', demoBlinkLength); //blink the first clap
Ferryy 2:6b15e2363f00 66 for(int i = 1; i < clapPatternSize; i++) { //blink the second and next claps
Ferryy 1:df9d6f3886f6 67 float delaytime = (clapPattern[i]-clapPattern[i-1])/1000.0 - demoBlinkLength;
Ferryy 1:df9d6f3886f6 68 output.printf("Blinking clap %d for %.2f second\r\n", i, delaytime);
Ferryy 2:6b15e2363f00 69 //output.printf("clapPattern[i] = %d\r\n", clapPattern[i]);
Ferryy 2:6b15e2363f00 70 //output.printf("clapPattern[i-1] = %d\r\n", clapPattern[i-1]);
Ferryy 1:df9d6f3886f6 71 wait(delaytime);
Ferryy 1:df9d6f3886f6 72 BlinkLed('r', demoBlinkLength);
Ferryy 1:df9d6f3886f6 73 }
Ferryy 1:df9d6f3886f6 74 }
Ferryy 1:df9d6f3886f6 75
Ferryy 2:6b15e2363f00 76 void StartLearning(void) //when switch is pressed, system goes into learning mode.
Ferryy 2:6b15e2363f00 77 {
Ferryy 2:6b15e2363f00 78 output.printf("--- Starting Learning Mode! Enter clap pattern");
Ferryy 2:6b15e2363f00 79 led_red = 0;
Ferryy 2:6b15e2363f00 80 learning = true;
Ferryy 2:6b15e2363f00 81 }
Ferryy 2:6b15e2363f00 82
Ferryy 1:df9d6f3886f6 83 //-------------------[ Functions ]-------------------
Ferryy 1:df9d6f3886f6 84 void Initialize()
Ferryy 1:df9d6f3886f6 85 {
Ferryy 1:df9d6f3886f6 86 timer.start();
Ferryy 1:df9d6f3886f6 87 boardVcc = 1;
Ferryy 1:df9d6f3886f6 88 boardGnd = 0;
Ferryy 1:df9d6f3886f6 89 boardReset = 0;
Ferryy 1:df9d6f3886f6 90 led_red = 1;
Ferryy 1:df9d6f3886f6 91 led_green = 1;
Ferryy 1:df9d6f3886f6 92 led_blue = 1;
Ferryy 2:6b15e2363f00 93 lamp.period_ms(1);
Ferryy 1:df9d6f3886f6 94 boardClap.rise(&ClapDetected);
Ferryy 2:6b15e2363f00 95 demoSwitch.rise(&DemoPattern);
Ferryy 2:6b15e2363f00 96 learningSwitch.rise(&StartLearning);
Ferryy 0:6c254e376969 97 }
Ferryy 0:6c254e376969 98
Ferryy 1:df9d6f3886f6 99 void PrintClaps()
Ferryy 1:df9d6f3886f6 100 {
Ferryy 1:df9d6f3886f6 101 if(printedClap < currentClap) { //if the last clap isn't printed yet
Ferryy 1:df9d6f3886f6 102 output.printf("* Detected clap %d: %d\r\n", ++printedClap, clapData[printedClap]); //debug the clap
Ferryy 1:df9d6f3886f6 103 }
Ferryy 1:df9d6f3886f6 104 }
Ferryy 0:6c254e376969 105
Ferryy 1:df9d6f3886f6 106 bool CheckTimeout() //check if clap timeout occurs(when last clap is more then x seconds ago)
Ferryy 1:df9d6f3886f6 107 {
Ferryy 2:6b15e2363f00 108 return ((currentClap > 0) && (timer.read_ms() > (clapData[currentClap-1] + timeout_ms)));
Ferryy 2:6b15e2363f00 109 }
Ferryy 2:6b15e2363f00 110
Ferryy 2:6b15e2363f00 111 void SavePattern()
Ferryy 2:6b15e2363f00 112 {
Ferryy 2:6b15e2363f00 113 for(int i = 0; i < currentClap; i++) clapPattern[i] = clapData[i]; //save clapped buffer as new pattern
Ferryy 2:6b15e2363f00 114 clapPatternSize = currentClap; //save pattern size (amount of claps)
Ferryy 2:6b15e2363f00 115 led_red = 1; //turn off red 'recording' LED
Ferryy 2:6b15e2363f00 116 }
Ferryy 2:6b15e2363f00 117
Ferryy 2:6b15e2363f00 118 bool CheckClapPattern() //check if clapped pattern matches
Ferryy 2:6b15e2363f00 119 {
Ferryy 2:6b15e2363f00 120 if(clapPatternSize != currentClap) return false; //if nr of claps is not equal return mismatch
Ferryy 2:6b15e2363f00 121
Ferryy 2:6b15e2363f00 122 bool mismatch = false; //variable to keep track if any mismatch is found
Ferryy 2:6b15e2363f00 123
Ferryy 2:6b15e2363f00 124 for(int i = 1; i < clapPatternSize; i++) { //check for each clap (each time interval between claps
Ferryy 2:6b15e2363f00 125 int realClapDelta = clapData[i] - clapData[i-1]; //measured clap pattern
Ferryy 2:6b15e2363f00 126 int requiredClapDelta = clapPattern[i] - clapPattern[i-1]; //set clap pattern
Ferryy 2:6b15e2363f00 127
Ferryy 2:6b15e2363f00 128 int maxClapDelta = requiredClapDelta + allowedError;
Ferryy 2:6b15e2363f00 129 int minClapDelta = requiredClapDelta - allowedError;
Ferryy 2:6b15e2363f00 130
Ferryy 2:6b15e2363f00 131 if((realClapDelta < minClapDelta) || (realClapDelta > maxClapDelta)) {
Ferryy 2:6b15e2363f00 132 mismatch = true;
Ferryy 2:6b15e2363f00 133 break;
Ferryy 2:6b15e2363f00 134 }
Ferryy 2:6b15e2363f00 135 }
Ferryy 2:6b15e2363f00 136 return !mismatch; //return if clap pattern matches (true) or not (false)
Ferryy 1:df9d6f3886f6 137 }
Ferryy 1:df9d6f3886f6 138
Ferryy 1:df9d6f3886f6 139 void ResetMeasurement() //reset counters to start new measurement
Ferryy 1:df9d6f3886f6 140 {
Ferryy 1:df9d6f3886f6 141 output.printf("--- Timeout. %d claps and took %.2fs in total ---\r\n", currentClap, (clapData[currentClap-1] - clapData[0])/1000.0);
Ferryy 2:6b15e2363f00 142 currentClap = 0; //reset clap counters
Ferryy 1:df9d6f3886f6 143 printedClap = 0;
Ferryy 1:df9d6f3886f6 144 }
Ferryy 1:df9d6f3886f6 145
Ferryy 2:6b15e2363f00 146 void BlinkLed(char color, float time) //Blink led ('r', 'g' or 'b'. 'p'urple, 'y'ellow, 'c'yan or 'w'hite) for given time (float in sec)
Ferryy 1:df9d6f3886f6 147 {
Ferryy 2:6b15e2363f00 148 if(color=='r' || color=='w' || color=='y' || color=='p') led_red = 0;
Ferryy 2:6b15e2363f00 149 if(color=='g' || color=='w' || color=='y' || color=='c') led_green = 0;
Ferryy 2:6b15e2363f00 150 if(color=='b' || color=='w' || color=='p' || color=='c') led_blue = 0;
Ferryy 2:6b15e2363f00 151 wait(time);
Ferryy 2:6b15e2363f00 152 if(color=='r' || color=='w' || color=='y' || color=='p') led_red = 1;
Ferryy 2:6b15e2363f00 153 if(color=='g' || color=='w' || color=='y' || color=='c') led_green = 1;
Ferryy 2:6b15e2363f00 154 if(color=='b' || color=='w' || color=='p' || color=='c') led_blue = 1;
Ferryy 1:df9d6f3886f6 155 }
Ferryy 1:df9d6f3886f6 156
Ferryy 0:6c254e376969 157
Ferryy 0:6c254e376969 158 //-------------------[ Main ]-------------------
Ferryy 0:6c254e376969 159 int main()
Ferryy 0:6c254e376969 160 {
Ferryy 2:6b15e2363f00 161 Initialize(); //initialize all required components and interrupts(!)
Ferryy 0:6c254e376969 162
Ferryy 0:6c254e376969 163 while (true) {
Ferryy 1:df9d6f3886f6 164 PrintClaps(); //update the serial terminal to print all detected claps
Ferryy 0:6c254e376969 165
Ferryy 2:6b15e2363f00 166 if(learning) { //learning state can be enabled by interrupt by switch on devboard
Ferryy 2:6b15e2363f00 167 if( CheckTimeout() ) { // if timeout happened -> clap pattern ended
Ferryy 2:6b15e2363f00 168 SavePattern(); //save clapped pattern as the new reference pattern
Ferryy 2:6b15e2363f00 169 learning = false; //disable learning state
Ferryy 2:6b15e2363f00 170 }
Ferryy 2:6b15e2363f00 171 } else {
Ferryy 1:df9d6f3886f6 172 bool clapMatches = CheckClapPattern(); //check if claps match set pattern
Ferryy 2:6b15e2363f00 173 if(clapMatches) {
Ferryy 2:6b15e2363f00 174 wait(0.2); //give a delay to make UI feel better
Ferryy 2:6b15e2363f00 175 lamp = 1 - lamp; //switch lamp on or off
Ferryy 2:6b15e2363f00 176 BlinkLed('g', 0.5); //pattern match -> blink green
Ferryy 2:6b15e2363f00 177 ResetMeasurement();
Ferryy 2:6b15e2363f00 178 } else if( CheckTimeout() ) { //give the user some time to enter additional claps, else a timeout will happen.
Ferryy 2:6b15e2363f00 179 BlinkLed('r', 0.5); //pattern mismatch -> blink red
Ferryy 2:6b15e2363f00 180 ResetMeasurement();
Ferryy 2:6b15e2363f00 181 }
Ferryy 0:6c254e376969 182 }
Ferryy 0:6c254e376969 183 }
Ferryy 1:df9d6f3886f6 184 }