RP6Control M32: Tonfrequenzen

**Dirk** · 08.10.2009, 23:44

Hallo Leute,

beim RP6 wird mit Timer2 gepiepst:

Code:

void beep(uint8_t pitch, uint16_t time)
{
	controlStatus.beep = true;
	sound_timer = time;
	OCR2 = 255-pitch;
	TCCR2 =  (1 << WGM21) | (1 << COM20) | (1 << CS22) | (1 << CS21);
}

Das müßte dann ja Fast PWM mit TOP OCR2 sein?
Als Teiler ist wohl 256 vorgesehen (bei 16 MHz).

Wie muss ich dann den pitch berechnen?

Wäre das so richtig: pitch = 255 - (16000000 / 256 / f[Hz] / 2) ?

Gruß Dirk

**Dirk** · 10.10.2009, 16:28

So,- wen's interessiert:

Das sind die mit dem Beeper der M32 erreichbaren Töne:

Code:

// Define tone frequencies (well temperament):

// Great Octave
#define Tone_H      2       //123Hz

// Small Octave
#define Tone_c      16      //131Hz
#define Tone_cis    30      //139Hz
#define Tone_d      42      //147Hz
#define Tone_dis    54      //156Hz
#define Tone_e      65      //165Hz
#define Tone_f      76      //175Hz
#define Tone_fis    86      //185Hz
#define Tone_g      96      //196Hz
#define Tone_gis    105     //208Hz
#define Tone_a      113     //220Hz
#define Tone_ais    121     //233Hz
#define Tone_h      128     //247Hz

// ' Octave
#define Tone_C1     136     //262Hz
#define Tone_Cis1   142     //277Hz
#define Tone_D1     149     //294Hz
#define Tone_Dis1   155     //311Hz
#define Tone_E1     160     //330Hz
#define Tone_F1     166     //349Hz
#define Tone_Fis1   171     //370Hz
#define Tone_G1     175     //392Hz
#define Tone_Gis1   180     //415Hz
#define Tone_A1     184     //440Hz
#define Tone_Ais1   188     //466Hz
#define Tone_H1     192     //494Hz

// '' Octave
#define Tone_C2     195     //523Hz
#define Tone_Cis2   199     //554Hz
#define Tone_D2     202     //587Hz
#define Tone_Dis2   205     //622Hz
#define Tone_E2     208     //659Hz
#define Tone_F2     210     //698Hz
#define Tone_Fis2   213     //740Hz
#define Tone_G2     215     //784Hz
#define Tone_Gis2   217     //831Hz
#define Tone_A2     219     //880Hz
#define Tone_Ais2   221     //932Hz
#define Tone_H2     223     //988Hz

// ''' Octave
#define Tone_C3     225     //1047Hz
#define Tone_Cis3   227     //1109Hz
#define Tone_D3     228     //1175Hz
#define Tone_Dis3   230     //1245Hz
#define Tone_E3     231     //1319Hz
#define Tone_F3     233     //1397Hz
#define Tone_Fis3   234     //1480Hz
#define Tone_G3     235     //1568Hz
#define Tone_Gis3   236     //1661Hz
#define Tone_A3     237     //1760Hz
#define Tone_Ais3   238     //1865Hz
#define Tone_H3     239     //1976Hz

// '''' Octave
#define Tone_C4     240     //2093Hz
#define Tone_Cis4   241     //2217Hz
#define Tone_D4     242     //2349Hz
#define Tone_Dis4   242     //2489Hz
#define Tone_E4     243     //2637Hz
#define Tone_F4     244     //2794Hz
#define Tone_Fis4   244     //2960Hz
#define Tone_G4     245     //3136Hz
#define Tone_Gis4   246     //3322Hz
#define Tone_A4     246     //3520Hz
#define Tone_Ais4   247     //3729Hz
#define Tone_H4     247     //3951Hz

// ''''' Octave
#define Tone_C5     248     //4186Hz

Ab der 4. Oktave kann man nicht mehr jeden Ton darstellen. Viel Spaß beim Piepsen!

Gruß Dirk