Notes.nxc

Krúžok Robotiky

/*
 program notes, draws noteso on the LCD display
 Programmed by Ivan Ryger

*/

#define C  523    //Hz
#define D  587
#define E  659
#define F  698
#define G  784
#define A  880
#define H  988
#define C2 1047
int freq[8]={C,D,E,F,G,A,H,C2};//array storing melody
int i;

void Note(int freq, int xPos)//draws note on LCD
{

const int R=5;//diameter of the note base
const int yShift=10;//Y shift
const int d=2*R;//differentia of arithmetical progression
 switch(freq)
 {
             case C: CircleOut(xPos,yShift,R);break;//R-diameter, k-const Ypos
             case D: CircleOut(xPos,yShift+d,R);break;
             case E: CircleOut(xPos,yShift+2*d,R);break;
             case F: CircleOut(xPos,yShift+3*d,R);break;
             case G: CircleOut(xPos,yShift+4*d,R);break;
             case A: CircleOut(xPos,yShift+5*d,R);break;
             case H: CircleOut(xPos,yShift+6*d,R);break;
             case C2:CircleOut(xPos,yShift+7*d,R);break;
 }
             
}

task Battery()   //controls battery state
{
const int BAT_LOW=3800;
if(BatteryLevel()<BAT_LOW)
PlayTone(1000,500);
Wait(500);
PlayTone(2000,500);
Wait(500);
PlayTone(1000,500);
Wait(500);
PlayTone(2000,500);
Wait(500);
TextOut(10,LCD_LINE3,"sorry, Battery is low, I go sleeping, bye");
Wait(5000);// wait a while so user can read the text
ForceOff(true);//force the NXT to off state
}

task main()
{
start Battery;
SetVolume(2);//value can be in interval 0-4

 for(i=0;i<ArrayLen(freq);i++)
 {
  PlayTone(freq[i],100);
  Note(freq[i],10*i);
  Wait(100);

 }

}