Diff: Gamepad.cpp

Revision:

21:da0b4e14c867

Parent:

18:e0a4f15a7750

Child:

22:72357412608d

--- a/Gamepad.cpp	Wed Apr 26 13:58:10 2017 +0000
+++ b/Gamepad.cpp	Mon Jan 27 12:31:15 2020 +0000
@@ -5,58 +5,72 @@
 //////////// constructor/destructor ////////////
 Gamepad::Gamepad()
     :
-    _led1(new PwmOut(PTA1)),
-    _led2(new PwmOut(PTA2)),
-    _led3(new PwmOut(PTC2)),
-    _led4(new PwmOut(PTC3)),
-    _led5(new PwmOut(PTC4)),
-    _led6(new PwmOut(PTD3)),
+    _led1(new PwmOut(PTA2)),
+    _led2(new PwmOut(PTC2)),
+    _led3(new PwmOut(PTC3)),
+    _led4(new PwmOut(PTA1)),
+    _led5(new PwmOut(PTC10)),
+    _led6(new PwmOut(PTC11)),
 
-    _button_A(new InterruptIn(PTB9)),
-    _button_B(new InterruptIn(PTD0)),
-    _button_X(new InterruptIn(PTC17)),
-    _button_Y(new InterruptIn(PTC12)),
-    _button_L(new InterruptIn(PTB18)),
-    _button_R(new InterruptIn(PTB3)),
-    _button_back(new InterruptIn(PTB19)),
-    _button_start(new InterruptIn(PTC5)),
-    _button_joystick(new InterruptIn(PTC16)),
+    _button_A(new InterruptIn(PTC7)),
+    _button_B(new InterruptIn(PTC9)),
+    _button_X(new InterruptIn(PTC5)),
+    _button_Y(new InterruptIn(PTC0)),
+    _button_start(new InterruptIn(PTC8)),
 
-    _vert(new AnalogIn(PTB10)),
-    _horiz(new AnalogIn(PTB11)),
+    _vert(new AnalogIn(PTB11)),
+    _horiz(new AnalogIn(PTB10)),
 
-    _buzzer(new PwmOut(PTC10)),
-    _pot(new AnalogIn(PTB2)),
-
-    _timeout(new Timeout()),
-
-    _event_state(0),
+    _pot1(new AnalogIn(PTB2)),
+    _pot2(new AnalogIn(PTB3)),
+    
+    dac(new AnalogOut(DAC0_OUT)),
+    ticker(new Ticker),
+    timeout(new Timeout),
+    note_timeout(new Timeout),
 
     _x0(0),
     _y0(0)
 {}
 
-Gamepad::~Gamepad()
-{
-    delete _led1,_led2,_led3,_led4,_led5,_led6;
-    delete _button_A,_button_B,_button_joystick,_vert,_horiz;
-    delete _button_X,_button_Y,_button_back,_button_start;
-    delete _button_L,_button_R, _buzzer, _pot, _timeout;
-}
 
 ///////////////// public methods /////////////////
 
 void Gamepad::init()
 {
     leds_off();
-    init_buttons();
 
     // read centred values of joystick
     _x0 = _horiz->read();
     _y0 = _vert->read();
 
-    // clear all flags
-    _event_state = 0;
+    // Set all buttons to PullUp
+    _button_A->mode(PullUp);
+    _button_B->mode(PullUp);
+    _button_X->mode(PullUp);
+    _button_Y->mode(PullUp);
+    _button_start->mode(PullUp);
+
+    // Set up interrupts for the fall of buttons
+    _button_A->fall(callback(this,&Gamepad::A_fall_interrupt));
+    _button_B->fall(callback(this,&Gamepad::B_fall_interrupt));
+    _button_X->fall(callback(this,&Gamepad::X_fall_interrupt));
+    _button_Y->fall(callback(this,&Gamepad::Y_fall_interrupt));
+    _button_start->fall(callback(this,&Gamepad::start_fall_interrupt));
+
+    // initalise button flags
+    reset_buttons();
+    
+    // number of samples
+    _n = 16;
+    _sample_array = new float[_n];
+
+    // create sample array for one period between 0.0 and 1.0
+    for (int i = 0; i < _n ; i++) {
+        _sample_array[i] = 0.5f + 0.5f*sin(i*2*PI/_n);
+        //printf("y[%i] = %f\n",i,_sample_array[i]);
+    }
+
 }
 
 void Gamepad::leds_off()
@@ -92,7 +106,7 @@
 
 void Gamepad::led(int n,float val) const
 {
-    // ensure they are within vlaid range
+    // ensure they are within valid range
     if (val < 0.0f) {
         val = 0.0f;
     }
@@ -126,28 +140,16 @@
     }
 }
 
-float Gamepad::read_pot() const
+float Gamepad::read_pot1() const
 {
-    return _pot->read();
+    return _pot1->read();
 }
 
-void Gamepad::tone(float frequency, float duration)
+float Gamepad::read_pot2() const
 {
-    _buzzer->period(1.0f/frequency);
-    _buzzer->write(0.5);  // 50% duty cycle - square wave
-    _timeout->attach(callback(this, &Gamepad::tone_off), duration );
+    return _pot2->read();
 }
 
-bool Gamepad::check_event(GamepadEvent const id)
-{
-    // Check whether event flag is set
-    if (_event_state[id]) {
-        _event_state.reset(id);  // clear flag
-        return true;
-    } else {
-        return false;
-    }
-}
 
 // this method gets the magnitude of the joystick movement
 float Gamepad::get_mag()
@@ -194,79 +196,78 @@
     return d;
 }
 
-///////////////////// private methods ////////////////////////
+void Gamepad::reset_buttons() {
+    A_fall = B_fall = X_fall = Y_fall = start_fall = false;
+}
 
-void Gamepad::tone_off()
-{
-    // called after timeout
-    _buzzer->write(0.0);
+bool Gamepad::A_pressed() {
+    if (A_fall) {
+        A_fall = false;
+        return true;
+    } else {
+        return false;
+    }
 }
 
-void Gamepad::init_buttons()
-{
-    // turn on pull-downs as other side of button is connected to 3V3
-    // button is 0 when not pressed and 1 when pressed
-    _button_A->mode(PullDown);
-    _button_B->mode(PullDown);
-    _button_X->mode(PullDown);
-    _button_Y->mode(PullDown);
-    _button_back->mode(PullDown);
-    _button_start->mode(PullDown);
-    _button_L->mode(PullDown);
-    _button_R->mode(PullDown);
-    _button_joystick->mode(PullDown);
-    // therefore setup rising edge interrupts
-    _button_A->rise(callback(this,&Gamepad::a_isr));
-    _button_B->rise(callback(this,&Gamepad::b_isr));
-    _button_X->rise(callback(this,&Gamepad::x_isr));
-    _button_Y->rise(callback(this,&Gamepad::y_isr));
-    _button_L->rise(callback(this,&Gamepad::l_isr));
-    _button_R->rise(callback(this,&Gamepad::r_isr));
-    _button_start->rise(callback(this,&Gamepad::start_isr));
-    _button_back->rise(callback(this,&Gamepad::back_isr));
-    _button_joystick->rise(callback(this,&Gamepad::joy_isr));
+bool Gamepad::B_pressed() {
+    if (B_fall) {
+        B_fall = false;
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Gamepad::X_pressed() {
+    if (X_fall) {
+        X_fall = false;
+        return true;
+    } else {
+        return false;
+    }
 }
 
-// button interrupts ISRs
-// Each of these simply sets the appropriate event bit in the _event_state
-// variable
-void Gamepad::a_isr()
-{
-    _event_state.set(A_PRESSED);
+bool Gamepad::Y_pressed() {
+    if (Y_fall) {
+        Y_fall = false;
+        return true;
+    } else {
+        return false;
+    }
 }
-void Gamepad::b_isr()
-{
-    _event_state.set(B_PRESSED);
-}
-void Gamepad::x_isr()
-{
-    _event_state.set(X_PRESSED);
-}
-void Gamepad::y_isr()
-{
-    _event_state.set(Y_PRESSED);
+
+bool Gamepad::start_pressed() {
+    if (start_fall) {
+        start_fall = false;
+        return true;
+    } else {
+        return false;
+    }
 }
-void Gamepad::l_isr()
-{
-    _event_state.set(L_PRESSED);
+
+bool Gamepad::A_held() {
+    // Buttons are configured as PullUp hence the not
+    return !_button_A->read();
 }
-void Gamepad::r_isr()
-{
-    _event_state.set(R_PRESSED);
+
+bool Gamepad::B_held() {
+    return !_button_B->read();
 }
-void Gamepad::back_isr()
-{
-    _event_state.set(BACK_PRESSED);
+
+bool Gamepad::X_held() {
+    return !_button_X->read();
 }
-void Gamepad::start_isr()
-{
-    _event_state.set(START_PRESSED);
+
+bool Gamepad::Y_held() {
+    return !_button_Y->read();
 }
-void Gamepad::joy_isr()
-{
-    _event_state.set(JOY_PRESSED);
+
+bool Gamepad::start_held() {
+    return !_button_start->read();
 }
 
+///////////////////// private methods ////////////////////////
+
 // get raw joystick coordinate in range -1 to 1
 // Direction (x,y)
 // North     (0,1)
@@ -300,7 +301,7 @@
     float x = coord.x*sqrt(1.0f-pow(coord.y,2.0f)/2.0f);
     float y = coord.y*sqrt(1.0f-pow(coord.x,2.0f)/2.0f);
 
-    Vector2D mapped_coord = {x,y};
+    Vector2D mapped_coord = {-x,-y};
     return mapped_coord;
 }
 
@@ -338,4 +339,104 @@
 
     Polar p = {mag,angle};
     return p;
-}
\ No newline at end of file
+}
+
+// ISRs for buttons
+void Gamepad::A_fall_interrupt() {
+    A_fall = true;
+}
+void Gamepad::B_fall_interrupt() {
+    B_fall = true;
+}
+void Gamepad::X_fall_interrupt() {
+    X_fall = true;
+}
+void Gamepad::Y_fall_interrupt() {
+    Y_fall = true;
+}
+void Gamepad::start_fall_interrupt() {
+    start_fall = true;
+}
+
+void Gamepad::set_bpm(float bpm)
+{
+    _bpm = bpm;
+}
+
+void Gamepad::tone(float frequency,float duration)
+{
+    // calculate time step between samples
+    float dt = 1.0f/(frequency*_n);
+    // start from beginning of LUT
+    _sample = 0;
+
+    // setup ticker and timeout to stop ticker
+
+    // the ticker repeats every dt to plat each sample in turn
+    ticker->attach(callback(this, &Gamepad::ticker_isr), dt);
+    // the timeout stops the ticker after the required duration
+    timeout->attach(callback(this, &Gamepad::timeout_isr), duration );
+}
+
+void Gamepad::play_melody(int length,const int *notes,const int *durations,float bpm,bool repeat)
+{
+    // copy arguments to member variables
+    _bpm = bpm;
+    _notes = notes;  // pointer for array
+    _durations = durations;  // pointer for array
+    _melody_length = length;
+    _repeat = repeat;
+
+    _note = 0;  // start from first note
+
+    play_next_note(); // play the next note in the melody
+}
+
+
+void Gamepad::play_next_note()
+{
+    // _note is the note index to play
+
+    // calculate the duration and frequency of the note
+    float duration = 60.0f/(_bpm*_durations[_note]);
+    float frequency = float(_notes[_note]);
+    //printf("[%i] f = %f d = %f\n",_note,frequency,duration);
+
+    // check if the note is not a space and if not then play the note
+    if (frequency > 0) {
+        tone(frequency,duration);
+    }
+
+    // the timeout goes to the next note in the melody
+    // double the duration to leave a bit of a gap in between notes to be better
+    // able to distinguish them
+    note_timeout->attach(callback(this, &Gamepad::note_timeout_isr), duration*2.0f );
+}
+
+// called when the next note needs playing
+void Gamepad::note_timeout_isr()
+{
+    _note++; // go onto next note
+
+    // if in repeat mode then reset the note counter when get to end of melody
+    if (_repeat && _note == _melody_length) {
+        _note=0;
+    }
+
+    // check if note is within the melody
+    if (_note < _melody_length) {
+        play_next_note();
+    }
+}
+
+void Gamepad::ticker_isr()
+{
+    dac->write(_sample_array[_sample%_n]);  // use modulo to get index to play
+    _sample++;  // increment the sample ready for next time
+}
+
+void Gamepad::timeout_isr()
+{
+    // stops the ticker to end the note
+    ticker->detach();
+}