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// Knihovna pro generovani hudebnich zvuku dane frekvence a delky nebo |
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// dane noty temperovaneho ladeni a delky. |
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// |
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// Pro gnerovani pouziva casovac T0, T1 a jednotku CCP1. |
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// |
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// POZOR -- POZOR -- POZOR |
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// Pri nizsi frekvenci XTALu (nez asi 5MHz) je rezie preruseni tak velka, ze spotrebuje |
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// veskery strojovy cas a uz nedojde k ukonceni rozehraneho tonu vyssi frekvence (z oktavy 7 |
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// nebo nad cca 8KHz). Resenim je pouzit vlastni INT proceduru s minimalni rezii. |
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// |
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// (c)miho 2004, pefi 2004, |
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// |
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// Historie |
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// 1.00 Uvodni verze |
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// 1.01 Pridana podpora zapnuteho WDT |
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// Konfiguracni parametry |
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//#define SOUND_HI PIN_xx // Pozitivni vystup |
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//#define SOUND_LO PIN_xx // Komplementarni vystup |
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//#define SOUND_WDT 1 // Pokud je pouzit WDT |
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#ifndef SOUND_CLOCK |
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#define SOUND_CLOCK 4000000 // Frelvence krystalu v Hz |
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#endif |
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// Definice hudebnich tonu (not) pro proceduru SoundNote() |
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#define SOUND_C 0 |
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#define SOUND_Cis 1 |
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#define SOUND_D 2 |
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#define SOUND_Dis 3 |
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#define SOUND_E 4 |
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#define SOUND_F 5 |
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#define SOUND_Fis 6 |
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#define SOUND_G 7 |
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#define SOUND_Gis 8 |
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#define SOUND_A 9 |
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#define SOUND_Ais 10 |
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#define SOUND_H 11 |
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#define SOUND_Space 12 // Pomlka |
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// Prototypy verejnych procedur |
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void SoundBeep(unsigned int16 Frequency, unsigned int16 Duration); |
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// Predava se frekvence v Hz a doba trvani v ms (0 znamena ticho) |
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void SoundNote(unsigned int8 Note, Octave, unsigned int16 Duration); |
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// Predava se cislo noty (0 je C), posunuti v oktavach (0 nejnizsi ton, |
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// SOUND_Space je ticho), doba trvani v ms |
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// Alternativni makra pro generovani konstatnich tonu |
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// SoundBeepMacro(Frequency, Duration) - frekvence nesmi byt 0 |
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// SoundNoteMacro(Note, Octave, Duration) - nepodporuje SOUND_Space |
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// SoundSpaceMacro(Duration) - hraje ticho |
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// Privatni cast |
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#int_ccp1 |
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void IntCCP1() |
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// Preruseni od jednotky CCP1 generuje vystup |
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{ |
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volatile int1 Data; // Posledni stav vystupu |
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output_bit(SOUND_HI,Data); // Nastav vystup |
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output_bit(SOUND_LO,~Data); |
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Data=~Data; // Otoc stav vystupu |
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} |
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#if SOUND_CLOCK < (65535*32*4*2) // < 16.7 MHz |
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#define SOUND_PRESCALE 1 |
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#elif SOUND_CLOCK < (65535*32*4*2*2) // < 33.6 MHz |
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#define SOUND_PRESCALE 2 |
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#elif SOUND_CLOCK < (65535*32*4*2*4) // < 67.1 MHz |
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#define SOUND_PRESCALE 4 |
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#elif SOUND_CLOCK < (65535*32*4*2*8) // < 134 MHz |
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#define SOUND_PRESCALE 8 |
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#else |
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#error SOUND_CLOCK Frequency too high |
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#endif |
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#bit T0IF=0x0B.2 |
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void SoundBeep(unsigned int16 Frequency, unsigned int16 Duration) |
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// Predava se frekvence v Hz a doba trvani v ms (0 znamena ticho) |
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// Rozumne frekvence jsou od 32Hz |
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{ |
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unsigned int16 Time; // Pocitadlo zlomkoveho casu |
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// Inicializace casovace |
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if (Frequency!=0) // Frekvence 0 znamena ticho |
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{ |
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setup_ccp1(CCP_COMPARE_RESET_TIMER); |
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set_timer1(0); |
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(int16)CCP_1=SOUND_CLOCK/SOUND_PRESCALE/4/2/Frequency; |
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#if SOUND_PRESCALE==1 |
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setup_timer_1(T1_INTERNAL|T1_DIV_BY_1); |
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#elif SOUND_PRESCALE==2 |
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setup_timer_1(T1_INTERNAL|T1_DIV_BY_2); |
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#elif SOUND_PRESCALE==4 |
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setup_timer_1(T1_INTERNAL|T1_DIV_BY_4); |
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#elif SOUND_PRESCALE==8 |
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setup_timer_1(T1_INTERNAL|T1_DIV_BY_8); |
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#endif |
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enable_interrupts(int_ccp1); |
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enable_interrupts(global); |
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} |
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// Delka tonu merena casovacem T0 (bez preruseni) |
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Time=0; |
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setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1); |
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while (Duration) |
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{ |
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#ifdef SOUND_WDT |
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restart_wdt(); // Nuluj watchdog abychom se nezresetovali |
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#endif |
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if (T0IF) // Preteceni T0 - kazdych (1/CLK)*4*256 |
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{ |
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T0IF = 0; |
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Time += (256*4*1000*2048+SOUND_CLOCK/2)/SOUND_CLOCK; |
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} |
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if (Time>>11) |
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{ |
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Time -= 2048; |
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Duration--; |
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} |
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} |
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// Konec casovace |
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disable_interrupts(int_ccp1); |
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disable_interrupts(global); |
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} |
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// Definice casu pulperody pro nejnizsi oktavu, v kvantech casovace T1 |
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// Pulperiody tonu v dalsich oktavach se ziskavaji rotaci vpravo |
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#define SOUND_Peri_C ((30578*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 30578us |
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#define SOUND_Peri_Cis ((28862*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 28862us |
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#define SOUND_Peri_D ((27242*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 27242us |
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#define SOUND_Peri_Dis ((25713*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 25713us |
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#define SOUND_Peri_E ((24270*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 24270us |
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#define SOUND_Peri_F ((22908*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 22908us |
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#define SOUND_Peri_Fis ((21622*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 21622us |
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#define SOUND_Peri_G ((20408*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 20408us |
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#define SOUND_Peri_Gis ((19263*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 19263us |
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#define SOUND_Peri_A ((18182*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 18182us |
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#define SOUND_Peri_Ais ((17161*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 17161us |
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#define SOUND_Peri_H ((16198*(SOUND_CLOCK/1000)/1000/4/2)/SOUND_PRESCALE) // Perioda 16198us |
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// Kontrola na delku konstanty (musi byt mensi nez delka citace) |
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#if SOUND_Peri_C > 65535 |
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#error "SOUND_Peri_C too long (Note C requires delay > 65535 cycles)" |
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#endif |
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// Casove konstanty pro noty nejnizsi oktavy |
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const unsigned int16 Table[12] = |
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SOUND_Peri_C, SOUND_Peri_Cis, SOUND_Peri_D, SOUND_Peri_Dis, |
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SOUND_Peri_E, SOUND_Peri_F, SOUND_Peri_Fis, SOUND_Peri_G, |
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SOUND_Peri_Gis, SOUND_Peri_A, SOUND_Peri_Ais, SOUND_Peri_H; |
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void SoundNote(unsigned int8 Note, Octave, unsigned int16 Duration) |
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// Predava se cislo noty (0 je C), posunuti v oktavach (0 nejnizsi ton) |
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// doba trvani v ms (0 znamena ticho) |
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// Zahraje zadanou notu v zadane oktave dane delky |
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{ |
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unsigned int16 Time; // Pocitadlo zlomkoveho casu |
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// Inicializace casovace |
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if (Note!=SOUND_Space) // Pokud se ma hrat spust hrani |
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{ |
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setup_ccp1(CCP_COMPARE_RESET_TIMER); |
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set_timer1(0); |
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(int16)CCP_1=Table[Note]>>Octave; |
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#if SOUND_PRESCALE==1 |
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setup_timer_1(T1_INTERNAL|T1_DIV_BY_1); |
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#elif SOUND_PRESCALE==2 |
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setup_timer_1(T1_INTERNAL|T1_DIV_BY_2); |
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#elif SOUND_PRESCALE==4 |
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setup_timer_1(T1_INTERNAL|T1_DIV_BY_4); |
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#elif SOUND_PRESCALE==8 |
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setup_timer_1(T1_INTERNAL|T1_DIV_BY_8); |
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#endif |
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enable_interrupts(int_ccp1); |
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enable_interrupts(global); |
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} |
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// Delka tonu merena casovacem T0 (bez preruseni) |
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Time=0; |
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setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1); |
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while (Duration) |
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{ |
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if (T0IF) // Preteceni T0 - kazdych (1/CLK)*4*256 |
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{ |
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T0IF = 0; |
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Time += (256*4*1000*2048+SOUND_CLOCK/2)/SOUND_CLOCK; |
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} |
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if (Time>>11) |
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{ |
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Time -= 2048; |
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Duration--; |
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} |
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#ifdef SOUND_WDT |
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restart_wdt(); // Nuluj watchdog abychom se nezresetovali |
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#endif |
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} |
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// Konec casovace |
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disable_interrupts(int_ccp1); |
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disable_interrupts(global); |
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} |