如何制作 function 以在 Arduino 蜂鸣器上保存和重放音调？

Question

i have a question about my project in Arduino, i have this array of frequencies for notes:

int note[] = {261, 293, 329, 349, 392, 440, 494, 523};

and this function for play notes if one of pushbuttons is pressed:

void play(float U_ADC0){ 


        if(U_ADC0 >= 4.80) { // ADC conversion (Voltage value)  PB1
            BUZZ (0.1 , note[0]) ; _delay_ms (100) ;  //  buzz
            lcd_clear();
            lcd_write("C4");  // lcd display 

        }
        
        if(U_ADC0 < 4.80 && U_ADC0 >= 4.70){ //PB2
            BUZZ (0.1 , note[1]) ; _delay_ms (100) ;
            lcd_clear();
            lcd_write("D4");
        }
        
        if(U_ADC0 < 4.72 && U_ADC0 >= 4.65){ //PB3
            BUZZ (0.1 , note[2]) ; _delay_ms (100) ;
            lcd_clear();
            lcd_write("E4");
        }
        
        if(U_ADC0 < 4.60 && U_ADC0 >= 4.50){  //PB4
            BUZZ (0.1 , note[3]) ; _delay_ms (100) ;
            lcd_clear();
            lcd_write("F4");
        }
        
        if(U_ADC0 < 4.20 && U_ADC0 >= 4.05){ //PB5
            BUZZ (0.1 , note[4]) ; _delay_ms (100) ;
            lcd_clear();
            lcd_write("G4");
        }
        
        if(U_ADC0 < 3.80 && U_ADC0 >= 3.70){ //PB6
            BUZZ (0.1 , note[5]) ; _delay_ms (100) ;
            lcd_clear();
            lcd_write("A4");
        }
        
        if(U_ADC0 < 3.55 && U_ADC0 >= 3.30){ //PB7
            BUZZ (0.1 , note[6]) ; _delay_ms (100) ;
            lcd_clear();
            lcd_write("B4");
        }
        
        if(U_ADC0 < 2.55 && U_ADC0 >= 2.45){ //PB8
            BUZZ (0.1 , note[7]) ; _delay_ms (100) ;
            lcd_clear();
            lcd_write("C5");

        }

}

so, how can i make new field of frequencies in order by pressed pushbuttons so i could save and replay my melody on buzzer? I used all my ideas but doesn't work and i don't have new ones. So if somebody have idea, can you help me?

Answer 1

I would use one button (let's call it the record button ) to switch between play & record and only play . In this way, whenever you push buttons that get those buzzer frequencies will not save, but when you like the melody and want to save you can click the record button and start to save. For making this happen, follow the algorithm below:

After your first function, create a function for record button . In this function, you need call your first function (void play) you have already written and add one more snippet of code for assigning the value of pushed button into the int array you will create at the beginning of your code (let's call it int recorded[] ).

One more step remains and that's to check (if the record button is pushed) the switch button, so it will toggle between record & play and play and call the corresponding function. Finally, you can add one more button to play the melody from your int recorded[] .