Marek Vitula / GoalCounter

This library provides simple interface for the table football goal counter based on a IR LED or laser diode and phototransistor.

Dependents:   goal_counter_project

GoalCounter.cpp@1:eb4ee5706587, 2019-01-13 (annotated)

Committer:
nxf46245
Date:
Sun Jan 13 14:23:14 2019 +0000
Revision:
1:eb4ee5706587
Parent:
0:d00bd73d08f8
Child:
2:cb1c7db56434
Fix NonCopyable issue

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nxf46245 0:d00bd73d08f8 1 #include "GoalCounter.h"
nxf46245 0:d00bd73d08f8 2
nxf46245 1:eb4ee5706587 3 /** GoalCounter class.
nxf46245 1:eb4ee5706587 4 * Simple implementation of goal counter for table football using laser diode
nxf46245 1:eb4ee5706587 5 * and phototransistor. Output of the phototransistor is connected to the digital
nxf46245 1:eb4ee5706587 6 * input pin of MCU. When the laser beam is interrupted by ball passing the the cage
nxf46245 1:eb4ee5706587 7 * Timer starts counting and measuring width of the pulse and if the duration of pulse
nxf46245 1:eb4ee5706587 8 * is not longer than two seconds, goal is detected and _score variable is incremented.
nxf46245 1:eb4ee5706587 9 *
nxf46245 1:eb4ee5706587 10 * Pulse duration is also used for the calculation of ball passing speed. However,
nxf46245 1:eb4ee5706587 11 * measurement is not precise.
nxf46245 1:eb4ee5706587 12 *
nxf46245 1:eb4ee5706587 13 * Example:
nxf46245 1:eb4ee5706587 14 * @code
nxf46245 1:eb4ee5706587 15 * #include "mbed.h"
nxf46245 1:eb4ee5706587 16 * #include "GoalCounter.h"
nxf46245 1:eb4ee5706587 17 *
nxf46245 1:eb4ee5706587 18 * GoalCounter gc(D2);
nxf46245 1:eb4ee5706587 19 * TODO
nxf46245 1:eb4ee5706587 20 *
nxf46245 1:eb4ee5706587 21 * @endcode
nxf46245 1:eb4ee5706587 22 *
nxf46245 1:eb4ee5706587 23 * @param pin PinName of the pin where is phototransistor connected
nxf46245 1:eb4ee5706587 24
nxf46245 1:eb4ee5706587 25 **/
nxf46245 1:eb4ee5706587 26 GoalCounter::GoalCounter(PinName pin, Timer * t) : _t(t) {
nxf46245 0:d00bd73d08f8 27
nxf46245 1:eb4ee5706587 28 InterruptIn *_interrupt = new InterruptIn(pin);
nxf46245 1:eb4ee5706587 29
nxf46245 1:eb4ee5706587 30 _interrupt->fall(callback(this, &GoalCounter::tstart));
nxf46245 1:eb4ee5706587 31 _interrupt->rise(callback(this, &GoalCounter::tstop));
nxf46245 0:d00bd73d08f8 32
nxf46245 1:eb4ee5706587 33 _score = 0;
nxf46245 1:eb4ee5706587 34 _time = 0;
nxf46245 1:eb4ee5706587 35 is_goal = 0;
nxf46245 0:d00bd73d08f8 36 }
nxf46245 0:d00bd73d08f8 37
nxf46245 1:eb4ee5706587 38 void GoalCounter::tstart() {
nxf46245 1:eb4ee5706587 39 _t->start();
nxf46245 0:d00bd73d08f8 40 }
nxf46245 0:d00bd73d08f8 41
nxf46245 1:eb4ee5706587 42 void GoalCounter::tstop() {
nxf46245 1:eb4ee5706587 43 _t->stop();
nxf46245 1:eb4ee5706587 44 _time = _t->read();
nxf46245 1:eb4ee5706587 45 _t->reset();
nxf46245 0:d00bd73d08f8 46
nxf46245 1:eb4ee5706587 47 if ( _time > 0 && _time < 2 && _score < 10) {
nxf46245 1:eb4ee5706587 48 _score++;
nxf46245 1:eb4ee5706587 49 _balltimes[_score] = _time;
nxf46245 1:eb4ee5706587 50 is_goal = 1;
nxf46245 0:d00bd73d08f8 51 }
nxf46245 0:d00bd73d08f8 52 }
nxf46245 0:d00bd73d08f8 53
nxf46245 0:d00bd73d08f8 54
nxf46245 0:d00bd73d08f8 55 uint8_t GoalCounter::get_score() {
nxf46245 1:eb4ee5706587 56 return _score;
nxf46245 0:d00bd73d08f8 57 }
nxf46245 0:d00bd73d08f8 58
nxf46245 0:d00bd73d08f8 59 float GoalCounter::get_balltime(uint8_t score) {
nxf46245 0:d00bd73d08f8 60 if (score <= 10 && score > 0)
nxf46245 1:eb4ee5706587 61 return _balltimes[score];
nxf46245 0:d00bd73d08f8 62 else
nxf46245 0:d00bd73d08f8 63 return -1;
nxf46245 0:d00bd73d08f8 64 }
nxf46245 0:d00bd73d08f8 65
nxf46245 0:d00bd73d08f8 66 float GoalCounter::get_balltime() {
nxf46245 1:eb4ee5706587 67 return _balltimes[_score];
nxf46245 0:d00bd73d08f8 68
nxf46245 0:d00bd73d08f8 69 }
nxf46245 0:d00bd73d08f8 70
nxf46245 0:d00bd73d08f8 71 float GoalCounter::get_ballspeed(uint8_t score) {
nxf46245 0:d00bd73d08f8 72 if (score <= 10 && score > 0) {
nxf46245 1:eb4ee5706587 73 float speed = 0.034f/_balltimes[score]*3.6f;
nxf46245 0:d00bd73d08f8 74 return speed;
nxf46245 0:d00bd73d08f8 75 }
nxf46245 0:d00bd73d08f8 76 else
nxf46245 0:d00bd73d08f8 77 return -1;
nxf46245 0:d00bd73d08f8 78 }
nxf46245 0:d00bd73d08f8 79
nxf46245 0:d00bd73d08f8 80 float GoalCounter::get_ballspeed() {
nxf46245 1:eb4ee5706587 81 float speed = 0.034f/_balltimes[_score]*3.6f;
nxf46245 0:d00bd73d08f8 82 return speed;
nxf46245 0:d00bd73d08f8 83 }
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