// Metronome // The tempo and beat number are selected by 4 switches. Tempo: 20-180, beat:2-16 // The beat is audible and visible. // The 1st beat is 880HZ and red/green led, the other beats are 440Hz and green. // The tempo and beat are stored in EEPROM, new run starts from last set values. // PIC 16f690 //============================================================================ //#define DEBUG #include <16F690.h> //#device *=16 #use delay(clock=8000000) #ifdef DEBUG #use rs232(BAUD=9600,XMIT=PIN_A0, RCV=PIN_A1) //for debug #endif #FUSES INTRC_IO //Internal RC Osc, NO clock out //#FUSES HS //High speed Oscillator, XTAL #FUSES NOFCMEN //Fail-safe clock monitor disabled #FUSES PUT //Power Up Timer #FUSES NOWDT //No Watch Dog Timer #FUSES NOPROTECT //Code not protected from reading #FUSES BROWNOUT //Reset when brownout detected #FUSES MCLR //Master Clear pin enabled #FUSES NOCPD //No EE protection #FUSES IESO //Internal External Switch Over mode enabled //***************** Hardware setup #define LCD_TYPE 2 // 2lines * 16 char // PIC PIN functions // pickit ICSP PINs // P1 Vpp: RA3 !!!!!! // P2 VDD PIC 1 // P3 GND PIC20 // P4 DAT: RA0, xmit // P5 Clock: RA1, rcv // P6 T1G: RA4, idle // PIC PIN functions // RA_0 PIC19 XMIT // RA_1 PIC18 RCV #define FIRST_BEAT_LED PIN_A2 // PIC17 LED out for 1st beat // RA_3 PIC 4 VPP #define SOUND_OUT PIN_A4 // PIC 3 - A pwm output for sound and LED beats // LCD PINs #define LCD_ENABLE_PIN PIN_C0 // PIC16-LCD PIN6 #define LCD_RS_PIN PIN_C1 // PIC15-LCD PIN4 #define LCD_RW_PIN PIN_C2 // PIC14 - empty, (LCD PIN5:Ground - only write) // PIN_C3 PIC 7 - empty // data1 PIN_C4 PIC 6 -LCD PIN11 // data2 PIN_C5 PIC 5 -LCD PIN12 // data3 PIN_C6 PIC 8 -LCD PIN13 // data4 PIN_C7 PIC 9 -LCD PIN14 // // INPUT PINs // PIN_B4 //PIC 13 - SW1 in - Tempo DOWN // PIN_B5 //PIC 12 - SW2 in - Tempo UP // PIN_B6 //PIC 11 - SW3 in - Beat UP // PIN_B7 //PIC 10 - SW4 in - Beat DOWN // #define tempo_up PIN_B5 //switch connections #define tempo_down PIN_B4 #define beat_up PIN_B6 #define beat_down PIN_B7 #define tempo_min 20 // intervals for tempo and beat #define tempo_max 180 #define beat_min 2 #define beat_max 16 // Includes #include // for LCD write // global variables volatile int tempo, beat; volatile boolean rhytm_changed=TRUE; // set by switches, interrupt B, tested in main volatile long int sound, silence, cycle; // sound and silence in ms, sound+silene =cycle volatile boolean period_high = TRUE; // the generated pwm for sound volatile long int time_spent=0; // time spent within the cycle volatile boolean sound_active = FALSE; // to generate sound volatile int beat_no; // the actual beat number //=========================================================================== void enable_int_RB() { clear_interrupt(INT_RB); // enable_interrupts(INT_RB); enable_interrupts(GLOBAL); } void pic_init() { int temp; setup_oscillator( OSC_8MHZ ); // own 8MHz Osc // PINs init temp = input_b(); // switch to input // set_tris_c az lcd_initben } #INT_RB // setting TEMPO, BEAT by 4 switches void setting_rhytm() { delay_ms(15); // to reduce noise, debouncing if (!input(tempo_up)) if (tempo < tempo_max) tempo++; if (!input(tempo_down)) if (tempo > tempo_min) tempo--; if (!input(beat_up)) if (beat < beat_max) beat++; if (!input(beat_down)) if (beat > beat_min) beat--; rhytm_changed=TRUE; // to initiate recalculating timing } void calc_timing() // sound and silence in ms, sound+silene =cycle { cycle =(60000/tempo); sound = cycle/3; silence= cycle-sound; time_spent=0; #ifdef DEBUG // printf("\r\n cycle: %6lu \r\n", cycle); #endif } #INT_TIMER2 // void generate_sound() // generating half period high or low for sound { PERIOD_HIGH = !PERIOD_HIGH; if (PERIOD_HIGH) output_high(SOUND_OUT); else output_low(SOUND_OUT); } #INT_TIMER1 // void generate_rhytm() // generating sound and silence periods, setting frequencies { time_spent=time_spent +33; // increase with time slice if (time_spent > cycle) // cycle is over { time_spent=0; beat_no++; // next beat if (beat_no > beat) // if beat is over, 1st beat beat_no=1; } #ifdef DEBUG // printf("\r\n cycle, time_spent, beat: %6lu %6lu %2u \r\n", cycle, time_spent, beat_no); #endif if (time_spent 200) // the data aren't stored - 1st run { tempo=90; beat=4; } } void write_stored_data(int tempo, int beat) { write_eeprom (254,tempo); // storing initial values 1st run. delay_ms(10); write_eeprom (255,beat); delay_ms(10); } //=========================================================================== void main() { //****************************************************************************** //Declarations //INIT delay_ms(100); pic_init(); lcd_init(); enable_int_RB(); // enable setting tempo and beat with switches lcd_putc("\f"); // print names, the data is printed in print_data lcd_gotoxy(1,1); printf(lcd_putc,"TEMPO:"); lcd_gotoxy(1,2); printf(lcd_putc,"BEAT:"); read_stored_data(tempo, beat); // read stored last values for tempo, beat rhytm_changed=TRUE; // to enter into settings //****************************************************************************** while (TRUE) { if (rhytm_changed ) // runs at start or generated by RB interrupt changing tempo and beat { disable_interrupts(INT_RB); // no change in tempo beat disable_interrupts(INT_TIMER1); // no beating disable_interrupts(INT_TIMER2); // no sound print_data(); // tempo, beat write_stored_data(tempo,beat); // storing values calc_timing(); // calculating sound and silence time rhytm_changed=FALSE; // not to enter again without a change time_spent=0; // beginning of cycle beat_no=1; // 1st beat is coming setting_beat_time_slice(); // time slice =33 ms clear_interrupt(INT_TIMER1); enable_interrupts(INT_TIMER1); // to start beating cycle enable_interrupts(INT_RB); // enable changing tempo, beat again } } } //******************************************************************************