Diff: Gamepad.cpp

Revision:

1:6d25cd49059b

Parent:

0:a6288c29b936

Child:

2:ea5538fcfe2f

--- a/Gamepad.cpp	Sat Feb 04 15:31:44 2017 +0000
+++ b/Gamepad.cpp	Sat Feb 04 16:13:18 2017 +0000
@@ -1,5 +1,6 @@
 #include "Gamepad.h"
 
+//////////// constructor/destructor ////////////
 Gamepad::Gamepad()
 {
     led_1 = new PwmOut(PTA1);
@@ -24,30 +25,223 @@
     buzzer = new PwmOut(PTC10);
     pot = new AnalogIn(PTB2);
 
+    timeout = new Timeout();
+
 }
 
+Gamepad::~Gamepad()
+{
+    delete led_1,led_2,led_3,led_4,led_5,led_6;
+    delete lcd,joystick,button_A,button_B;
+    delete button_X, button_Y, button_back, button_start;
+    delete button_L, button_R, buzzer, pot, timeout;
+}
+
+///////////////// public methods /////////////////
+
 void Gamepad::init()
 {
     lcd->init();
     joystick->init();
+    leds_off();
+
+    buzzer->period(1.0/1000.0);  // 1 kHz
+
+    // clear all flags
+    a_flag=0,b_flag=0,x_flag=0,y_flag=0,l_flag=0,r_flag=0,back_flag=0,start_flag=0;
+
 }
 
 void Gamepad::leds_off()
 {
-    led_1->write(1.0);
-    led_2->write(1.0);
-    led_3->write(1.0);
-    led_4->write(1.0);
-    led_5->write(1.0);
-    led_6->write(1.0);
+    fade_leds(0.0);
 }
 
 void Gamepad::leds_on()
 {
-    led_1->write(0.0);
-    led_2->write(0.0);
-    led_3->write(0.0);
-    led_4->write(0.0);
-    led_5->write(0.0);
-    led_6->write(0.0);
+    fade_leds(1.0);
+}
+
+void Gamepad::fade_leds(float val)
+{
+    if (val < 0.0f) {
+        val = 0.0f;
+    }
+    if (val > 1.0f) {
+        val = 1.0f;
+    }
+
+    // leds are active-low, so subtract from 1.0
+    // 0.0 corresponds to fully-off, 1.0 to fully-on
+    val = 1.0f - val;
+
+    led_1->write(val);
+    led_2->write(val);
+    led_3->write(val);
+    led_4->write(val);
+    led_5->write(val);
+    led_6->write(val);
+}
+
+float Gamepad::read_pot()
+{
+    return pot->read();
+}
+
+void Gamepad::tone(float frequency, float duration)
+{
+    buzzer->period(1.0f/frequency);
+    buzzer->write(0.5);  // 50% duty cycle - square wave
+    timeout->attach(callback(this, &Gamepad::tone_off), duration );
+}
+
+bool Gamepad::a_pressed()
+{
+    // ISR must have been triggered
+    if (a_flag) {
+        a_flag = 0;  // clear flag
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Gamepad::b_pressed()
+{
+    // ISR must have been triggered
+    if (b_flag) {
+        b_flag = 0;  // clear flag
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Gamepad::x_pressed()
+{
+    // ISR must have been triggered
+    if (x_flag) {
+        x_flag = 0;  // clear flag
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Gamepad::y_pressed()
+{
+    // ISR must have been triggered
+    if (y_flag) {
+        y_flag = 0;  // clear flag
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Gamepad::l_pressed()
+{
+    // ISR must have been triggered
+    if (l_flag) {
+        l_flag = 0;  // clear flag
+        return true;
+    } else {
+        return false;
+    }
 }
+
+bool Gamepad::r_pressed()
+{
+    // ISR must have been triggered
+    if (r_flag) {
+        r_flag = 0;  // clear flag
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Gamepad::back_pressed()
+{
+    // ISR must have been triggered
+    if (back_flag) {
+        back_flag = 0;  // clear flag
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool Gamepad::start_pressed()
+{
+    // ISR must have been triggered
+    if (a_flag) {
+        a_flag = 0;  // clear flag
+        return true;
+    } else {
+        return false;
+    }
+}
+///////////////////// private methods ////////////////////////
+
+void Gamepad::tone_off()
+{
+    buzzer->write(0.0);
+}
+
+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);
+    // 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 interrupts ISRs
+void Gamepad::a_isr()
+{
+    a_flag=1;
+}
+void Gamepad::b_isr()
+{
+    b_flag=1;
+}
+void Gamepad::x_isr()
+{
+    x_flag=1;
+}
+void Gamepad::y_isr()
+{
+    y_flag=1;
+}
+void Gamepad::l_isr()
+{
+    l_flag=1;
+}
+void Gamepad::r_isr()
+{
+    r_flag=1;
+}
+void Gamepad::back_isr()
+{
+    back_flag=1;
+}
+void Gamepad::start_isr()
+{
+    start_flag=1;
+}
\ No newline at end of file