People Counter / Mbed 2 deprecated person_counter

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   mbed mbed-rtos 4DGL-uLCD-SE HC_SR04_Ultrasonic_Library

main.cpp@18:7b1d65b007ab, 2020-04-26 (annotated)

Committer:
mmarine3
Date:
Sun Apr 26 18:15:12 2020 +0000
Revision:
18:7b1d65b007ab
Parent:
17:b8b68ff5e33a
Child:
19:c78aafa613b8
Updated the allZero flag to trigger only when 2 values are non_zero to prevent noise from interfering with the system

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mmarine3 2:1ec843c95914 1 #include "mbed.h"
rmalik8 4:7d02b3f3bee6 2 #include "rtos.h"
mmarine3 17:b8b68ff5e33a 3 #include "SDFileSystem.h"
mmarine3 2:1ec843c95914 4 #include "uLCD_4DGL.h"
rmalik8 4:7d02b3f3bee6 5 #include "ultrasonic.h"
mmarine3 17:b8b68ff5e33a 6 #include "wave_player.h"
rmalik8 12:bebfef8d229f 7 #include "SongPlayer.h"
rmalik8 4:7d02b3f3bee6 8
rmalik8 3:b5cdd40e99e9 9 //#include <stdio.h>
mmarine3 2:1ec843c95914 10 #include <string>
mmarine3 2:1ec843c95914 11
rmalik8 4:7d02b3f3bee6 12
mmarine3 9:f4f03767acc0 13 uLCD_4DGL uLCD(p13, p14, p12); // Initialize uLCD serial tx, serial rx, reset pin;
mmarine3 17:b8b68ff5e33a 14 SDFileSystem sd(p5, p6, p7, p8, "sd"); //SD card
rmalik8 10:7a939a54515e 15 RawSerial blue(p9,p10); //Initialize Blutooth
rmalik8 12:bebfef8d229f 16 //Serial BT(p9,p10);
rmalik8 12:bebfef8d229f 17
rmalik8 12:bebfef8d229f 18 //waiting to figure out if sd card works
rmalik8 12:bebfef8d229f 19 //AnalogOut speaker(p18); //Initialize speaker
rmalik8 12:bebfef8d229f 20 //wave_player waver(&speaker); //Initialize Waveplayer
rmalik8 12:bebfef8d229f 21
rmalik8 10:7a939a54515e 22 Mutex serial_mutex;
mmarine3 8:c0a6a3363e43 23 Mutex dist;
mmarine3 2:1ec843c95914 24 DigitalOut MyLED(LED1);
mmarine3 2:1ec843c95914 25
rmalik8 10:7a939a54515e 26 volatile int musicChoice = 0;
rmalik8 10:7a939a54515e 27 //musicChoice can be values 0 to 3
rmalik8 11:f5d0c8bf1849 28 volatile int sdist = 0;
rmalik8 12:bebfef8d229f 29 volatile int counter = 0;
rmalik8 12:bebfef8d229f 30
rmalik8 12:bebfef8d229f 31 float note1[2]= {1568.0, 0.0
rmalik8 12:bebfef8d229f 32 };
rmalik8 13:3ba367bc16bc 33 float note2[2]= {1396.9, 0.0
rmalik8 12:bebfef8d229f 34 };
rmalik8 13:3ba367bc16bc 35 float note3[2]= {1244.5, 0.0
rmalik8 12:bebfef8d229f 36 };
rmalik8 12:bebfef8d229f 37 float duration[2]= {1, 0.0
rmalik8 12:bebfef8d229f 38 };
rmalik8 15:827fbc2e07d6 39
rmalik8 15:827fbc2e07d6 40 volatile int values[5] = {0,0,0,0,0};
rmalik8 15:827fbc2e07d6 41 volatile int index = 0;
rmalik8 15:827fbc2e07d6 42 volatile bool allZero = true;
rmalik8 15:827fbc2e07d6 43 int state = 0;
mmarine3 18:7b1d65b007ab 44 int non_zeros = 0;
rmalik8 12:bebfef8d229f 45
rmalik8 12:bebfef8d229f 46
mmarine3 9:f4f03767acc0 47 void sonar(int distance)
rmalik8 4:7d02b3f3bee6 48 {
rmalik8 4:7d02b3f3bee6 49 //put code here to execute when the sonar distance has changed
mmarine3 9:f4f03767acc0 50 dist.lock();
mmarine3 9:f4f03767acc0 51 sdist = distance;
rmalik8 15:827fbc2e07d6 52 values[index] = distance;
mmarine3 9:f4f03767acc0 53 dist.unlock();
rmalik8 15:827fbc2e07d6 54
rmalik8 16:5250c9fe0408 55 //fill array with 5 values
rmalik8 15:827fbc2e07d6 56 index++;
rmalik8 15:827fbc2e07d6 57 if (index > 4)
rmalik8 15:827fbc2e07d6 58 {
rmalik8 15:827fbc2e07d6 59 index = 0;
rmalik8 15:827fbc2e07d6 60 }
rmalik8 15:827fbc2e07d6 61
mmarine3 18:7b1d65b007ab 62 //check if more than one value is zero (noise cancellation)
rmalik8 15:827fbc2e07d6 63 allZero = true;
mmarine3 18:7b1d65b007ab 64 for (int i = 0; i < 5; i++) //Walk the list
mmarine3 18:7b1d65b007ab 65 {
mmarine3 18:7b1d65b007ab 66 if (values[i] != 0) //If value is not zero
rmalik8 15:827fbc2e07d6 67 {
mmarine3 18:7b1d65b007ab 68 ++non_zeros; //Incriment non_zero counter
mmarine3 18:7b1d65b007ab 69 //allZero = false;
mmarine3 18:7b1d65b007ab 70 if(non_zeros > 1) //If there is more than one non zero
mmarine3 18:7b1d65b007ab 71 {
mmarine3 18:7b1d65b007ab 72 allZero = false; //Change the allZero flag to false
mmarine3 18:7b1d65b007ab 73 }
rmalik8 15:827fbc2e07d6 74 }
rmalik8 15:827fbc2e07d6 75 }
mmarine3 18:7b1d65b007ab 76 non_zeros = 0;
mmarine3 18:7b1d65b007ab 77
rmalik8 12:bebfef8d229f 78 //printf("Sonar Distance:\r\n %d", sdist);
mmarine3 9:f4f03767acc0 79 }
rmalik8 4:7d02b3f3bee6 80
mmarine3 9:f4f03767acc0 81 ultrasonic mu(p30, p29, .1, 1, &sonar); //Set the trigger pin to p30 and the echo pin to p29
rmalik8 12:bebfef8d229f 82 //have updates every .1 seconds and a timeout after 1
rmalik8 12:bebfef8d229f 83 //second, and call sonar when the distance changes
mmarine3 9:f4f03767acc0 84
mmarine3 9:f4f03767acc0 85 void Sonar(void const* arguments)
mmarine3 9:f4f03767acc0 86 {
mmarine3 9:f4f03767acc0 87 mu.startUpdates();//start measuring the distance
rmalik8 12:bebfef8d229f 88 while(1) {
mmarine3 9:f4f03767acc0 89 //Do something else here
mmarine3 9:f4f03767acc0 90 mu.checkDistance(); //call checkDistance() as much as possible, as this is where
rmalik8 12:bebfef8d229f 91 //the class checks if dist needs to be called.
mmarine3 9:f4f03767acc0 92 Thread::wait(10);
rmalik8 4:7d02b3f3bee6 93 }
rmalik8 4:7d02b3f3bee6 94 }
mmarine3 2:1ec843c95914 95
mmarine3 8:c0a6a3363e43 96 //Thread to print the TOF and Sonar Values to the LCD
mmarine3 8:c0a6a3363e43 97 void LCD(void const *arguments)
mmarine3 8:c0a6a3363e43 98 {
mmarine3 8:c0a6a3363e43 99 Thread::wait(1000); //Wait for lidar and sonar setup
rmalik8 12:bebfef8d229f 100 serial_mutex.lock();
rmalik8 12:bebfef8d229f 101 uLCD.cls();
rmalik8 12:bebfef8d229f 102 uLCD.baudrate(BAUD_3000000);
rmalik8 12:bebfef8d229f 103 serial_mutex.unlock();
rmalik8 12:bebfef8d229f 104 while(1) {
rmalik8 10:7a939a54515e 105 serial_mutex.lock();
mmarine3 8:c0a6a3363e43 106 uLCD.cls();
mmarine3 8:c0a6a3363e43 107 dist.lock();
mmarine3 17:b8b68ff5e33a 108 uLCD.printf("Sonar Distance:\n %d\n Counter: %d \n Song: %d", sdist, counter, musicChoice);
mmarine3 8:c0a6a3363e43 109 dist.unlock();
rmalik8 10:7a939a54515e 110 serial_mutex.unlock();
mmarine3 17:b8b68ff5e33a 111 Thread::wait(100); //Allow time to read value before reprint
rmalik8 12:bebfef8d229f 112
rmalik8 12:bebfef8d229f 113 }
rmalik8 12:bebfef8d229f 114 }
rmalik8 12:bebfef8d229f 115
rmalik8 12:bebfef8d229f 116 void sounds(void const *arguments)
rmalik8 12:bebfef8d229f 117 {
rmalik8 12:bebfef8d229f 118 int last_counter = 0;
mmarine3 17:b8b68ff5e33a 119 //FILE *wave_file;
rmalik8 12:bebfef8d229f 120 // setup instance of new SongPlayer class, mySpeaker using pin 26
rmalik8 12:bebfef8d229f 121 // the pin must be a PWM output pin
rmalik8 12:bebfef8d229f 122 SongPlayer mySpeaker(p26);
rmalik8 12:bebfef8d229f 123 // Start song and return once playing starts
rmalik8 12:bebfef8d229f 124 //mySpeaker.PlaySong(note1,duration);
rmalik8 12:bebfef8d229f 125 while(1) {
rmalik8 12:bebfef8d229f 126 if (counter > last_counter) {
rmalik8 12:bebfef8d229f 127 switch (musicChoice) {
mmarine3 17:b8b68ff5e33a 128 case 0:
mmarine3 17:b8b68ff5e33a 129 printf("Beep\r\n");
rmalik8 12:bebfef8d229f 130 //do nothing
rmalik8 12:bebfef8d229f 131 break;
mmarine3 17:b8b68ff5e33a 132 case 1:
mmarine3 17:b8b68ff5e33a 133 //wave_file=fopen("/sd/test.wav","r");
mmarine3 17:b8b68ff5e33a 134 //if(wave_file==NULL) {printf("file open error!\n\n\r");}
mmarine3 17:b8b68ff5e33a 135 //waver.play(wave_file);
mmarine3 17:b8b68ff5e33a 136 //fclose(wave_file);
rmalik8 12:bebfef8d229f 137 mySpeaker.PlaySong(note1,duration);
rmalik8 12:bebfef8d229f 138 break;
mmarine3 17:b8b68ff5e33a 139 case 2:
rmalik8 12:bebfef8d229f 140 mySpeaker.PlaySong(note2,duration);
rmalik8 12:bebfef8d229f 141 break;
mmarine3 17:b8b68ff5e33a 142 case 3:
rmalik8 12:bebfef8d229f 143 mySpeaker.PlaySong(note3,duration);
rmalik8 12:bebfef8d229f 144 break;
rmalik8 12:bebfef8d229f 145 default:
mmarine3 17:b8b68ff5e33a 146 printf("Invalid Choice\r\n");
rmalik8 12:bebfef8d229f 147 break;
rmalik8 12:bebfef8d229f 148 }
mmarine3 17:b8b68ff5e33a 149 last_counter = counter;
rmalik8 12:bebfef8d229f 150 }
mmarine3 17:b8b68ff5e33a 151 //printf("Last Counter: %d\r\n",last_counter);
rmalik8 12:bebfef8d229f 152 Thread::wait(100);
mmarine3 8:c0a6a3363e43 153 }
mmarine3 8:c0a6a3363e43 154 }
mmarine3 8:c0a6a3363e43 155
rmalik8 10:7a939a54515e 156 void bluetooth(void const *arguments)
rmalik8 10:7a939a54515e 157 {
rmalik8 10:7a939a54515e 158 char bnum=0;
rmalik8 10:7a939a54515e 159 char bhit=0;
rmalik8 12:bebfef8d229f 160 while(1) {
rmalik8 10:7a939a54515e 161 serial_mutex.lock();
rmalik8 12:bebfef8d229f 162 if(!blue.readable()) {
rmalik8 12:bebfef8d229f 163 Thread::yield();
rmalik8 10:7a939a54515e 164 } else {
rmalik8 12:bebfef8d229f 165 if (blue.getc()=='!') {
rmalik8 12:bebfef8d229f 166 if (blue.getc()=='B') { //button data packet
rmalik8 12:bebfef8d229f 167 bnum = blue.getc(); //button number
rmalik8 12:bebfef8d229f 168 bhit = blue.getc(); //1=hit, 0=release
rmalik8 12:bebfef8d229f 169 if (blue.getc()==char(~('!' + 'B' + bnum + bhit))) { //checksum OK?
rmalik8 12:bebfef8d229f 170
rmalik8 12:bebfef8d229f 171 switch (bnum) {
rmalik8 12:bebfef8d229f 172 case '1': //number button 1
rmalik8 12:bebfef8d229f 173 if (bhit=='1') {
rmalik8 12:bebfef8d229f 174 musicChoice = 0;
rmalik8 12:bebfef8d229f 175 } else {
rmalik8 12:bebfef8d229f 176 //add release code here
rmalik8 12:bebfef8d229f 177 }
rmalik8 12:bebfef8d229f 178 break;
rmalik8 12:bebfef8d229f 179 case '2': //number button 2
rmalik8 12:bebfef8d229f 180 if (bhit=='1') {
rmalik8 12:bebfef8d229f 181 musicChoice = 1;
rmalik8 12:bebfef8d229f 182 } else {
rmalik8 12:bebfef8d229f 183 //add release code here
rmalik8 12:bebfef8d229f 184 }
rmalik8 12:bebfef8d229f 185 break;
rmalik8 12:bebfef8d229f 186 case '3': //number button 3
rmalik8 12:bebfef8d229f 187 if (bhit=='1') {
rmalik8 12:bebfef8d229f 188 musicChoice = 2;
rmalik8 12:bebfef8d229f 189 } else {
rmalik8 12:bebfef8d229f 190 //add release code here
rmalik8 12:bebfef8d229f 191 }
rmalik8 12:bebfef8d229f 192 break;
rmalik8 12:bebfef8d229f 193 case '4': //number button 4
rmalik8 12:bebfef8d229f 194 if (bhit=='1') {
rmalik8 12:bebfef8d229f 195 //add hit code here
rmalik8 12:bebfef8d229f 196 } else {
rmalik8 12:bebfef8d229f 197 //add release code here
rmalik8 12:bebfef8d229f 198 }
rmalik8 12:bebfef8d229f 199 break;
rmalik8 12:bebfef8d229f 200 case '5': //button 5 up arrow
rmalik8 12:bebfef8d229f 201 if (bhit=='1') {
rmalik8 12:bebfef8d229f 202 musicChoice = 3;
rmalik8 12:bebfef8d229f 203 } else {
rmalik8 12:bebfef8d229f 204 //add release code here
rmalik8 12:bebfef8d229f 205 }
rmalik8 12:bebfef8d229f 206 break;
rmalik8 12:bebfef8d229f 207 case '6': //button 6 down arrow
rmalik8 12:bebfef8d229f 208 if (bhit=='1') {
rmalik8 12:bebfef8d229f 209 //add hit code here
rmalik8 12:bebfef8d229f 210 } else {
rmalik8 12:bebfef8d229f 211 //add release code here
rmalik8 12:bebfef8d229f 212 }
rmalik8 12:bebfef8d229f 213 break;
rmalik8 12:bebfef8d229f 214 case '7': //button 7 left arrow
rmalik8 12:bebfef8d229f 215 if (bhit=='1') {
rmalik8 12:bebfef8d229f 216 //add hit code here
rmalik8 12:bebfef8d229f 217 } else {
rmalik8 12:bebfef8d229f 218 //add release code here
rmalik8 12:bebfef8d229f 219 }
rmalik8 12:bebfef8d229f 220 break;
rmalik8 12:bebfef8d229f 221 case '8': //button 8 right arrow
rmalik8 12:bebfef8d229f 222 if (bhit=='1') {
rmalik8 12:bebfef8d229f 223 //add hit code here
rmalik8 12:bebfef8d229f 224 } else {
rmalik8 12:bebfef8d229f 225 //add release code here
rmalik8 12:bebfef8d229f 226 }
rmalik8 12:bebfef8d229f 227 break;
rmalik8 12:bebfef8d229f 228 default:
rmalik8 12:bebfef8d229f 229 break;
rmalik8 12:bebfef8d229f 230 }
rmalik8 10:7a939a54515e 231 }
rmalik8 10:7a939a54515e 232 }
rmalik8 10:7a939a54515e 233 }
rmalik8 10:7a939a54515e 234 }
rmalik8 10:7a939a54515e 235 serial_mutex.unlock();
rmalik8 10:7a939a54515e 236 }
rmalik8 10:7a939a54515e 237 }
rmalik8 10:7a939a54515e 238
mmarine3 2:1ec843c95914 239 int main()
mmarine3 2:1ec843c95914 240 {
rmalik8 12:bebfef8d229f 241
mmarine3 7:85d42006e380 242 //wait(1.0);
mmarine3 7:85d42006e380 243
mmarine3 7:85d42006e380 244 //blu.attach(&parse_message,Serial::RxIrq);
rmalik8 12:bebfef8d229f 245 //Was used in lab 3 to interupt if reading in a blutooth command
mmarine3 7:85d42006e380 246 //Thread t#(name_of_thread_function);
mmarine3 8:c0a6a3363e43 247 Thread t1(LCD);//Initialize LCD thread
mmarine3 9:f4f03767acc0 248 Thread t2(Sonar);//Initialize Sonar thread
rmalik8 14:88c09f96bdda 249 Thread t3(sounds);//Initialize sound thread
rmalik8 14:88c09f96bdda 250 Thread t4(bluetooth);//Initialize bluetooth thread
rmalik8 12:bebfef8d229f 251
rmalik8 12:bebfef8d229f 252
mmarine3 8:c0a6a3363e43 253 /* //Code to read and play a file
mmarine3 7:85d42006e380 254 FILE *wave_file;
mmarine3 7:85d42006e380 255 //printf("Hello World");
mmarine3 7:85d42006e380 256 Thread::wait(1000);
mmarine3 7:85d42006e380 257 wave_file=fopen("/sd/test.wav","r");
mmarine3 7:85d42006e380 258 //serial_mutex.lock();
mmarine3 7:85d42006e380 259 if(wave_file==NULL) printf("file open error!\n\n\r");
mmarine3 7:85d42006e380 260 //serial_mutex.unlock();
mmarine3 7:85d42006e380 261 waver.play(wave_file);
mmarine3 7:85d42006e380 262 fclose(wave_file);
mmarine3 8:c0a6a3363e43 263 */
rmalik8 12:bebfef8d229f 264
mmarine3 8:c0a6a3363e43 265 //Loop to validate the main loop is executing
rmalik8 12:bebfef8d229f 266 while(1) {
rmalik8 15:827fbc2e07d6 267
rmalik8 15:827fbc2e07d6 268 //this 'state machine' should make sure that individuals are only counted once
rmalik8 15:827fbc2e07d6 269 if ((state != 1) && !allZero){
rmalik8 15:827fbc2e07d6 270 state = 1;
rmalik8 15:827fbc2e07d6 271 //do logic to figure out direction
rmalik8 15:827fbc2e07d6 272 //right now just adding to main counter
rmalik8 15:827fbc2e07d6 273 counter++;
rmalik8 15:827fbc2e07d6 274 }
rmalik8 15:827fbc2e07d6 275 if (state == 1 && allZero){
rmalik8 15:827fbc2e07d6 276 state = 0;
rmalik8 15:827fbc2e07d6 277 }
mmarine3 9:f4f03767acc0 278 //MyLED = !MyLED;
rmalik8 15:827fbc2e07d6 279 Thread::wait(100);
mmarine3 8:c0a6a3363e43 280 }
mmarine3 2:1ec843c95914 281 }