File content as of revision 10:2b0a9fc39109:

/*----------------------------------------------//------------------------------
    student   : m-moore
    class     : rtos
    directory : RTOS_HW_07
    file      : main.cpp
----description---------------------------------//------------------------------
-----includes-----------------------------------//----------------------------*/
    #include "mbed.h"                           // mbed class.
    #include "rtos.h"                           // rtos class.
    #include "C12832_lcd.h"                     // LCD  class.
//---defines------------------------------------//------------------------------
    #define LCD1 lcd.locate(0, 0);              // LCD line 1.
    #define LCD2 lcd.locate(0,11);              // LCD line 2.
    #define LCD3 lcd.locate(0,22);              // LCD line 3.
       

    #define DEBOUNCE         0.16               // debounce pause duration in S.
//--global_definitions--------------------------//------------------------------
//--global_variables----------------------------//------------------------------ 
//--global_instances----------------------------//------------------------------ 
    C12832_LCD   lcd;                           // LCD object.
    
    InterruptIn  iJoyStickUp    (p15);          // joystick up rising edge.
    InterruptIn  iJoyStickDown  (p12);          // joystick down rising edge.
    InterruptIn  iJoyStickLeft  (p13);          // joystick left rising edge.
    InterruptIn  iJoyStickRight (p16);          // joystick right rising edge.
    InterruptIn  iJoyStickCenter(p14);          // 1 if joystick middle pressed.

    DigitalOut  led3(LED1);                     // leftmost LED.
    
    Ticker      tickerMetronome;                // blinking LED.
    Ticker      tickerLCD;                      // display ticker.
    Timeout     timeoutDutyCycle;               // LED duty cycle delay.
    Timeout     timeoutMetronome;
//-------prototypes-----------------------------//------------------------------
    void initialization();                      // initialize settings.
//==============================================//==============================
    int main(void) 
    {
      iJoyStickUp.rise   (&ISR_up);             // metronome stop.
      iJoyStickDown.rise (&ISR_down);           // metronome start.
      
      iJoyStickLeft.rise (&ISR_left_rising);    // increase BPM.
      iJoyStickLeft.fall (&ISR_left_falling);   // anti-bounce.
      
      iJoyStickRight.rise(&ISR_right_rising);   // decrease BPM.
      iJoyStickRight.fall(&ISR_right_falling);  // anti-bounce.
      
      iJoyStickCenter.rise(&ISR_center);        // 60BPM.
      
      initialization();                         // initialize variables.
      
                                                // metronome ticker.
      tickerMetronome.attach(&interrupt_service_M,fMetroDelay);
      
                                                // LCD ticker.
      tickerLCD.attach(&lcd_display,LCDSAMPLERATE);  
      
      while(1)                                  // all timer/interrupt driven.
      {
        wait(10.0);
      }
    }       
/*----------------------------------------------//----------------------------*/
    void initialization(void)                   // program initializations.
    {

    }
/*----------------------------------------------//----------------------------*/
    void ISR_left_rising(void)                  // increase BPM.
    {
      __disable_irq();                          // anti-bounce.

      dMetroBPM++;                              // increase BPM.
      
                                                // saturate metronome BPM.
      if (dMetroBPM > METROMAX) dMetroBPM = METROMAX;
      if (dMetroBPM < METROMIN) dMetroBPM = METROMIN;
      fMetroDelay = 60.0 / (float) (dMetroBPM); // calculate Ticker delay time.
      
      wait(DEBOUNCE);                           // debounce time.
      
      __enable_irq();                           // safe by now.
    }
/*----------------------------------------------//----------------------------*/
    void ISR_left_falling(void)                 // ignore rising after falling edge.
    {
      __disable_irq();                          // anti-bounce.
      
      wait(DEBOUNCE);                           // debounce time.
      
      __enable_irq();                           // safe by now.
    }
/*----------------------------------------------//----------------------------*/
    void ISR_right_rising(void)                 // decrease BPM.
    {
      __disable_irq();                          // anti-bounce.

      dMetroBPM--;                              // decrease BPM.
      
                                                // saturate metronome BPM.
      if (dMetroBPM > METROMAX) dMetroBPM = METROMAX;
      if (dMetroBPM < METROMIN) dMetroBPM = METROMIN;
      fMetroDelay = 60.0 / (float) (dMetroBPM); // calculate Ticker delay time.
      
      wait(DEBOUNCE);                           // debounce time.
      
      __enable_irq();                           // safe by now.
    }
/*----------------------------------------------//----------------------------*/
    void ISR_right_falling(void)                // ignore rising after falling edge.
    {
      __disable_irq();                          // anti-bounce.
      
      wait(DEBOUNCE);                           // debounce time.
      
      __enable_irq();                           // safe by now.
    }
/*----------------------------------------------//----------------------------*/
    void ISR_up(void)                           // turn off metronome.
    {
      cMetronomeOn = 0;
    }
/*----------------------------------------------//----------------------------*/
    void ISR_down(void)                         // metronome on with timeout.
    {
      cMetronomeOn = 1;
      timeoutMetronome.detach();
      timeoutMetronome.attach(&turn_off_metronome,METROTIME);
    }
/*----------------------------------------------//----------------------------*/
    void ISR_center(void)                       // set BPM = 60.
    {
      dMetroBPM = 60;
      fMetroDelay = 60.0 / (float) (dMetroBPM); // calculate Ticker delay time.
      tickerMetronome.detach();                 // change BPM immediately.
      tickerMetronome.attach(&interrupt_service_M,fMetroDelay);
    }
/*----------------------------------------------//----------------------------*/